WIRELESS TECHNOLOGYProtocols, Standards, and Techniques pdf phần 10 pdf

P1: FDJ book CRC-Wireless November 18, 2001 14:38 Char Count= 264 required. Their Walsh codes are not predetermined and are assigned on a demand basis. In the description of the channels, a signal point mapping block is present in all channel structures. The signal point mapping block maps the binary levels 0 and 1 onto +1 and −1, respectively. 9.10.1 Forward Pilot Channel TheF-PICHisanunmodulated,direct-sequencespreadspectrumsignaltrans- mitted continuously by each base station, unless the base station is classified as a hopping pilot beacon base station. The F-PICH prior to Walsh spreading contains a sequence of zeros. Such a sequence is combined with the Walsh code 0, length 64 (W 64 0 ), which also encompasses a sequence of zeros. The F-PICH allows a mobile station to acquire the timing of the forward CDMA channel, provides a phase reference for coherent demodulation, and provides means for signal strength comparisons between base stations for handoff pur- poses. Only one F-PICH is used per forward CDMA channel for both SR 1 and SR 3. Figure 9.16 depicts the F-PICH structure for both SR 1 and SR 3. The outputs S I and S Q shown in Figure 9.16 constitute the inputs of the DEMUX blocks shown in Figure 9.8, for SR 1, and Figure 9.11, for SR 3. 9.10.2 Forward Transmit Diversity Pilot Channel The F-TDPICH is an unmodulated, direct-sequence spread spectrum signal transmitted continuously by a CDMA base station. It is used to support forward-link transmit diversity. F-PICH and F-TDPICH provide phase ref- erences for coherent demodulation of those forward-link CDMA channels deploying transmit diversity. The transmission of F-TDPICH does not imply a decrease of the transmit power of F-PICH. On the contrary, the base station should continue to use sufficient power on the F-PICH to ensure that a mobile station is able to acquire and estimate the forward CDMA channel without Signal Point Mapping and Gain All 0s Pilot Channels Data 0 FIGURE 9.16 Forward pilot channels structure. © 2002 by CRC Press LLC E:\Java for Engineers\VP Publication\Java for Engineers.vp Thursday, April 25, 2002 9:27:36 AM Color profile: Disabled Composite Default screen P1: FDJ book CRC-Wireless November 18, 2001 14:38 Char Count= 264 using energy from the F-TDPICH. F-TDPICH is transmitted with Walsh code 16, length 128 (W 128 16 ). Only one F-TDPICH is used per forward CDMA chan- nel, with this channel provided in SR 1 and not in SR 3. Its configuration is the same as that shown in Figure 9.16. 9.10.3 Forward Auxiliary Pilot Channel The F-APICH is used for forward-link spot beam-forming purposes in net- works with smart antennas. The utilization of F-APICH provides for high data rate applications in specific locations. It is used as a phase reference for co- herent demodulation of those forward-link CDMA channels associated with it. Zero or more F-APICHs can be transmitted by the base station on an active forward CDMA channel. An F-APICH can be shared by a number of dis- tinct mobiles in the same spot beam. The locations served by F-APICHs may vary, as required. Spot beams can be used to increase coverage of a particular geographic point or to increase capacity of hot spots. Systems making use of such an option must provide for separate forward-link channels for the specific area. F-APICHs are code-multiplexed with other forward-link chan- nels. This obviously reduces the number of Walsh codes available for traffic. To reduce this effect, long Walsh codes are used for these channels. The F- APICH is transmitted with Walsh code n, length N (W N n ), where N ≤ 512 and 1 ≤ n ≤ N − 1. The Walsh code number and Walsh code length are deter- mined by the base station. This channel is used in SR 1 and in SR 3, with the number of them per forward CDMA channel not specified. Its configuration is the same as that shown in Figure 9.16. 9.10.4 Forward Auxiliary Transmit Diversity Pilot Channel The F-ATDPICH is a transmit diversity pilot channel associated with an F- APICH. F-ATDPICH and F-APICH provide phase references for coherent demodulation of those forward-link CDMA channels associated with the F-APICH. F-ATDPICH is transmitted with Walsh code n + N/2, length N (W N n + N/2 ), where N ≤ 512 and 1 ≤ n ≤ N − 1. The Walsh code number and Walsh code length are determined by the base station. This channel is used in SR 1 and not in SR 3, with the number per forward CDMA channel not specified. Its configuration is the same as that shown in Figure 9.16. 9.10.5 Forward Dedicated Auxiliary Pilot Channel The F-DAPICH is anoptional auxiliary pilot channel usedon a dedicated basis for a given mobile station. It is an unmodulated, direct-sequence spread spec- trum signal transmitted continuously by a CDMA base station. F-DAPICH is code-multiplexed with other forward-link channels. Its Walsh code number © 2002 by CRC Press LLC E:\Java for Engineers\VP Publication\Java for Engineers.vp Thursday, April 25, 2002 9:27:36 AM Color profile: Disabled Composite Default screen P1: FDJ book CRC-Wireless November 18, 2001 14:38 Char Count= 264 and the corresponding Walsh code length are determined by the base station. F-DAPICH is employed aiming at antenna beam-forming applications and beam-steering techniques to increase the coverage or date rate for a particular mobile station. Note that F-DAPICH cannot be considered a common channel. This channel is used for periodic channel estimations so that the forward-link antenna pattern can be adequately adjusted for better performance. 9.10.6 Forward Synchronization Channel TheF-SYNCHisacodechannelconveyingthesynchronizationmessage.Such a message is used by the mobile station to acquire initial time synchroniza- tion. F-SYNCH is implemented in cdma2000 as it is in cdmaOne. F-SYNCH is a low-powered, low-rate channel (1.2 kbit/s) that contains a single, re- peating message referred to as the sync channel message. This message is continuously broadcast by the cell and contains parameters, such as system identification number, network identification number, cell or sector Short PN offset, system time, long code state, and paging channel data rate. This chan- nel is transmitted with Walsh code 32, length 64 (W 64 32 ) for both SR 1 and SR 3, one per forward CDMA channel. The F-SYNCH structure is depicted in Figure 9.17. 9.10.7 Forward Paging Channel The F-PCH is a code channel used for transmission of control information and pages from a base station to the mobile stations. It conveys system overhead Signal Point Mapping and Gain 4.8 ksymb/s I S Q S 0 (SR1) Block Interleaver (16x8) Symbol Repetition (x2) Convolutional Encoder (1/2, 9) 1.2 kbit/s 32 bits/ 26.666 ms frame Sync Channel Data Modulation Symbol (SR3) To Forward Transmission Block i i = 1, 2, 3 or FIGURE 9.17 Forward synchronization channel structure. © 2002 by CRC Press LLC E:\Java for Engineers\VP Publication\Java for Engineers.vp Thursday, April 25, 2002 9:27:36 AM Color profile: Disabled Composite Default screen P1: FDJ book CRC-Wireless November 18, 2001 14:38 Char Count= 264 Paging Channel Data Convolutional Encoder (1/2, 9) 4.8 ksymb/s 9.6 ksymb/s Symbol Repetition (x2) (x1) Block Interleaver (24x16) + 9.6 ksymb/s 19.2 ksymb/s 19.2 ksymb/s Long Code Generator Decimator 64:1 1.2288 Mchip/s Long Code Mask for Paging Channel k 19.2 ksymb/s Signal Point Mapping and Gain I S Q S 0 Modulation Symbol 96 bits/20 ms 192 bits/20 ms FIGURE 9.18 Forward paging channel structure. information and mobile station specific messages. It is identical to the paging channel of cdmaOne. F-PCH transmits in the slotted mode, each slot with 80 ms of duration. Mobile stations, on the other hand, may operate in either the slotted mode or nonslotted mode. Paging and control messages for a mo- bile station operating in the nonslotted mode can be conveyed in any of the F-PCH slots. Therefore, the nonslotted mode of operation requires the mo- bile station to monitor all the slots. The slotted mode of operation requires the assignment of a specific slot to the mobile station; this feature is used to save battery. There may be as many as seven F-PCHs per forward CDMA in SR 1. SR 3 does provide for F-PCH. The primary F-PCH is assigned Walsh code number 1, length 64 (W 64 1 ), with the remaining F-PCHs of the same length and numbered sequentially from 2 to 7 (W 64 2−7 ). These channels operate at full rate (9.6 kbit/s) and at half rate (4.8 kbit/s). The F-PCH is illustrated in Figure 9.18. 9.10.8 Forward Broadcast Control Channel The F-BCCH is a code channel used for transmission of control information from a base station to the mobile stations. It conveys broadcast overhead mes- sages and short message service broadcast messages. (Mobile specific mes- sages are not sent on this channel, but on the F-CCCH.) There may be as many aseightF-BCCHsperforwardCDMAinbothSR1andSR3.ThespecificWalsh code used is determined by the base station and such information is conveyed by the F-SYNCH. In both SR 1 and SR 3, 744 bits are transmitted in slots of 40, 80, or 160 ms. The 744 bits together with 16 quality indicator bits and eight encoder tail bits lead to data rates of, respectively, 19.2, 9.6, and 4.8 kbit/s. Different Walsh codes are used for the different F-BCCH structures. The F-BCCH structure is illustrated in Figure 9.19. © 2002 by CRC Press LLC E:\Java for Engineers\VP Publication\Java for Engineers.vp Thursday, April 25, 2002 9:27:36 AM Color profile: Disabled Composite Default screen P1: FDJ book CRC-Wireless November 18, 2001 14:38 Char Count= 264 Broadcast Control Channel Data (744 bits per 40, 80, or 160 ms) Encoder Tail (+8 bits) Convolutional Encoder 19.2, 9.6, or 4.8 ksymb/s Long Code Generator Long Code Mask + Block Interleaver Sequence Repetition (x1, x2, or x4) Signal Point Mapping and Gain Scrambling Bit Extractor Scrambling Bit Repetition Modulation Symbol S Frame Quality Indicator (+16 bits) FIGURE 9.19 Forward broadcast control channel structure. F-BCCH for SR 1 The long code generator for the SR 1 F-BCCH operates with a chip rate of 1.2288 Mchip/s. The I/Q Scrambling Bit Extractor block extracts the I and Q pairs at a rate given by the modulation symbol rate divided by twice the scrambling bit repetition factor. The scrambling repetition factor, in the scram- bling repetition bit block, is equal to 1 for the non-TD mode and 2 for the TD mode. Two operation options can be found for the F-BCCH, depend- ing on the convolutional encoder used. One of the options uses a 1/4-rate convolutional encoder with constraint length of 9. The other option uses a 1/2-rate convolutional encoder with constraint length of 9. In the first case, the block interleaver is of 3,072 symbols, whereas in the second case the block interleaver is of 1,535 symbols. The modulation symbol rates (rate af- ter the block interleaver) are, respectively, 76.8 and 38.4 ksymb/s. The Walsh codes in the respective cases are numbered n with lengths 32 (W 32 n ) and 64 (W 64 n ). F-BCCH for SR 3 The long code generator for the SR 3 F-BCCH operates with a chip rate of 3.6864 Mchip/s. The I/Q scrambling bit extractor block extracts the I and Q pairs at a rate given by the modulation symbol rate divided by the scram- bling bit repetition factor multiplied by 6. The scrambling repetition factor, in the scrambling repetition bit block, is equal to 3. A 1/3-rate convolutional encoder with constraint length of 9 is used, in which case the block interleaver © 2002 by CRC Press LLC E:\Java for Engineers\VP Publication\Java for Engineers.vp Thursday, April 25, 2002 9:27:36 AM Color profile: Disabled Composite Default screen P1: FDJ book CRC-Wireless November 18, 2001 14:38 Char Count= 264 operates with 2,304 symbols. The modulation symbol rate (rate after the block interleaver) is, therefore, 57.6 ksymb/s. The Walsh codes are numbered n with lengths 128 (W 128 n ). 9.10.9 Forward Quick Paging Channel The F-QPCH is an uncoded, spread, and on-off-keying modulated spread spectrum signal used in support of the operation of F-PCH and F-CCCH. It is sentbythebasestationtoinformmobilestationsoperatingintheslottedmode whether to receive the F-PCH or the F-CCCH starting in their respective next frames. The use of F-QPCH reduces the time a mobile station needs to process received data, resulting in increased battery life. This is because the mobile does not have to activate its processors to understand the messages of the channel. Indicators are used to facilitate the task. These indicators are recog- nized by threshold-based detection. Therefore, if there is no new message for the mobile station in the F-PCH or in the F-CCCH, it does not have to activate its processors to decode the message in the assigned slot. Data rates of 4.8 and 2.4 ksymb/s can be used. Slots of 80 ms are specified to convey two indicators per mobile in each slot. The resulting indicator rates are, respectively, 9.6 and 4.8 ksymb/s. The F-QPCH slots are aligned to initiate 20 ms before the start of the zero-offset pilot PN sequence. In SR 1, the symbols are repeated two or four times to yield a constant rate of 19.2 ksymb/s. In SR 3, the repetition fac- tors are, respectively, 3 and 6, leading to a transmission rate of 28.8 ksymb/s. One of the indicators, the paging indicator, serves the purpose of instructing a slotted mode mobile station to monitor the F-PCH or the F-CCCH starting in the next frame. The other indicator, the configuration change indicator, serves the purpose of instructing a slotted-mode mobile station to monitor the F-PCH, the F-CCCH, and the F-BCCH, after an idle handoff has been per- formed. This is carried out to determine whether the mobile station should update its stored parameters, in case the cell configuration parameters have changed. There may be up to three F-QPCHs per forward CDMA both in SR 1 and SR 3. These channels are assigned the Walsh codes numbered 48, 80, and 112, and length 128 (W 128 48 , W 128 80 , and W 128 112 , respectively). The F-QPCH structure is illustrated in Figure 9.20. 9.10.10 Forward Common Control Channel The F-CCCH conveys Layer 3 and MAC control messages from a base station to one or more mobile stations. The coding parameters are identical to those of F-PCH. It essentially replaces the F-PCHs for higher data rate configurations carrying mobile station specific messages. Therefore, F-CCCHs are effectively paging channels optimized for packet services, in which case F-PCHs are not © 2002 by CRC Press LLC E:\Java for Engineers\VP Publication\Java for Engineers.vp Thursday, April 25, 2002 9:27:36 AM Color profile: Disabled Composite Default screen P1: FDJ book CRC-Wireless November 18, 2001 14:38 Char Count= 264 Signal Point Mapping and Gain S Symbol Repetition Indicator Rate 9.6 or 4.8 ksymb/s Data Rate 4.8 or 2.4 ksymb/s Quick Paging Channel Data FIGURE 9.20 Forward quick paging channel structure. used. An F-CCCH contains slots of 80-ms duration accommodating 20-, 10-, or 5-ms frames. Paging and control messages for a mobile station operating in the nonslotted mode can be conveyed in any of the F-CCCH slots. Therefore, the nonslotted mode of operation requires the mobile station to monitor all the slots. The slotted mode of operation requires the assignment of a specific slot to the mobile station, a feature used to save battery. Although the data rate of the F-CCCHs may vary from frame to frame, for any given frame transmitted to the mobile station the data rate of that frame is previously known to that mobile station. There may be as many as seven F-CCCHs per forward CDMA in both SR 1 and SR 3. The specific Walsh code used is determined by the base station and such information is conveyed by the F-SYNCH. In both SR 1 and SR 3, three data rates are possible: 9.6, 19.2, and 38.4 kbit/s. The F-CCCH structure is illustrated in Figure 9.21. Common Control Channel Data Encoder Tail (+8 bits) Convolutional Encoder Long Code Generator Long Code Mask + Block Interleaver Signal Point Mapping and Gain Scrambling Bit Extractor Scrambling Bit Repetition Modulation Symbol S Frame Quality Indicator (+bits) E A B C D FIGURE 9.21 Forward common control channel structure. © 2002 by CRC Press LLC E:\Java for Engineers\VP Publication\Java for Engineers.vp Thursday, April 25, 2002 9:27:36 AM Color profile: Disabled Composite Default screen P1: FDJ book CRC-Wireless November 18, 2001 14:38 Char Count= 264 F-CCCH for SR 1 The long code generator for the SR 1 F-CCCH operates with a chip rate of 1.2288 Mchip/s. The I/Q scrambling bit extractor block extracts the I and Q pairs at a rate given by the modulation symbol rate divided by twice the scrambling bit repetition factor. The scrambling repetition factor, in the scram- bling repetition bit block, is equal to one for the non-TD mode and two for the TD mode. Two operation options can be found for the F-BCCH, depending on the convolutional encoder used. One of the options uses a 1 /4-rate convo- lutional encoder with constraint length of 9. The other option uses a 1/2-rate convolutional encoder with constraint length of 9. The Walsh codes in the respective cases for the respective transmission rates are W 16 n , W 32 n , and W 64 n , and W 32 n , W 64 n , and W 128 n . The various parameters for the points (A, B, C, D, E) shown in Figure 9.21 are specified in Table 9.9. F-CCCH for SR 3 The long code generator for the SR 3 F-CCCH operates with a chip rate of 3.6864 Mchip/s. The I/Q scrambling bit extractor block extracts the I and Q pairs at a rate given by the modulation symbol rate divided by the scram- bling bit repetition factor multiplied by 6. The scrambling repetition factor, TABLE 9.9 Forward Common Control Channel Parameters ABC D E Configuration (bits/ms) (bits) (kbit/s) (symbols) (ksymb/s) SR1 172/5 12 38.4 768 153.6 1/4 rate 172/10 12 19.2 768 76.8 360/10 16 38.4 1536 153.6 172/20 12 9.6 768 38.4 360/20 16 19.2 1536 76.8 744/20 16 38.4 3072 153.6 SR1 172/5 12 38.4 384 76.8 1/2 rate 172/10 12 19.2 384 38.4 360/10 16 38.4 768 76.8 172/20 12 9.6 384 19.2 360/20 16 19.2 768 38.4 744/20 16 38.4 1536 76.8 SR3 172/5 12 38.4 576 115.2 172/10 12 19.2 576 57.6 360/10 16 38.4 1152 115.2 172/20 12 9.6 576 28.8 360/20 16 19.2 1152 57.6 744/20 16 38.4 2304 115.2 © 2002 by CRC Press LLC E:\Java for Engineers\VP Publication\Java for Engineers.vp Thursday, April 25, 2002 9:27:36 AM Color profile: Disabled Composite Default screen P1: FDJ book CRC-Wireless November 18, 2001 14:38 Char Count= 264 in the scrambling repetition bit block, is equal to 3. A 1/3-rate convolu- tional encoder with constraint length of 9 is used. The Walsh codes for the three transmission rates are, respectively, W 64 n , W 128 n , and W 256 n . The various parameters for the points (A, B, C, D, E) shown in Figure 9.21 are specified in Table 9.9. 9.10.11 Forward Common Assignment Channel The F-CACH is used by the base station to acknowledge a mobile station accessing the R-EACH. In the reservation access mode, it is used to convey the address of an R-CCCH and the associated R-CPCSCH. This is the case in which the mobile station requests a channel for longer messaging. The mobile station then is informed of R-CCCH on the F-CACH. Concomitantly, an R-CPCSCH is also assigned for closed-loop power control purposes. The F-CACHprovidesrapidreverse-linkchannelassignmentstosupportrandom- access packet data transmission. The base station may choose not to support F-CACHs, in which case F-BCCHs may be used instead. There may be as many as seven F-CACHs per forward CDMA in both SR 1 and SR 3. The 32 channel bits per 5 ms frame together with eight quality indicator bits and eight encoder tail bits lead to a data rate of 9.6 kbit/s. The F-CACH structure is illustrated in Figure 9.22. The signal point mapping block in this case maps the binary levels 0 and 1 onto +1 and −1, respectively, in the presence of a message, or onto 0, in the absence of a message. FIGURE 9.22 Forward common assignment channel structure. © 2002 by CRC Press LLC E:\Java for Engineers\VP Publication\Java for Engineers.vp Thursday, April 25, 2002 9:27:36 AM Color profile: Disabled Composite Default screen P1: FDJ book CRC-Wireless November 18, 2001 14:38 Char Count= 264 F-CACH for SR 1 The long code generator for the SR 1 F-CACH operates with a chip rate of 1.2288 Mchip/s. The I/Q scrambling bit extractor block extracts the I and Q pairs at a rate given by the modulation symbol rate divided by twice the scrambling bit repetition factor. The scrambling repetition factor, in the scram- bling repetition bit block, is equal to one for the non-TD mode and two for the TD mode. Two operation options can be found for the F-BCCH, depend- ing on the convolutional encoder used. One of the options uses a 1/4-rate convolutional encoder with constraint length of 9. The other option uses a 1/2-rate convolutional encoder with constraint length of 9. In the first case, the block interleaver is of 192 symbols, whereas in the second case the block interleaver is of 96 symbols. The modulation symbol rates (rate after the block interleaver) are, respectively, 38.4 and 19.2 ksymb/s. The Walsh codes in the respective cases are W 64 32 and W 128 32 . F-CACH for SR 3 The long code generator for the SR 3 F-BCCH operates with a chip rate of 3.6864 Mchip/s. The I/Q scrambling bit extractor block extracts the I and Q pairs at a rate given by the modulation symbol rate divided by the scram- bling bit repetition factor multiplied by 6. The scrambling repetition factor, in the scrambling repetition bit block, is equal to 3. A 1/3-rate convolutional encoder with constraint length of 9 is used, in which case the block interleaver operates with 144 symbols. The modulation symbol rates (rate after the block interleaver) is, therefore, 28.8 ksymb/s. The Walsh code is W 256 32 . 9.10.12 Forward Common Power Control Channel The F-CPCCH conveys power control bits (PCBs) to multiple mobile sta- tions operating in one of the following modes: power controlled access mode (PCAM), reservation access mode (RAM), or designated access mode (DAM). In PCAM, the mobile station accesses the R-EACH to transmit an enhanced access preamble, an enhanced access header, and enhanced access data in the enhanced access probe using closed-loop power control. In RAM, the mobile station accesses R-EACH and R-CCCH. On R-EACH, it transmits an enhanced access preamble and an enhanced access header in the enhanced access probe. On R-CCCH, it transmits the enhanced access data using closed- loop power control. In DAM, the mobile station responds to requests received on F-CCCH. Each PCB, known as common power control subchannel, con- sists of one common power control bit. These PCBs are used to adjust the power levels of R-CCCH and R-EACH. The base station may support opera- tion on one to four F-CPCCHs. The PCBs (subchannels) are time-multiplexed on the F-CPCCH. Each subchannel controls an R-CCCH or an R-EACH. The © 2002 by CRC Press LLC E:\Java for Engineers\VP Publication\Java for Engineers.vp Thursday, April 25, 2002 9:27:36 AM Color profile: Disabled Composite Default screen [...]... structures of R-PICH and R-PCSCH are illustrated in Figure 9.30 9.11.5 Reverse Fundamental Channel and Reverse Supplemental Code Channel R-FCH and R-SCCH operate jointly as specified in RC 1 and RC 2 of SR 1 Such a combination provides higher data rate services and backward compatibility with cdmaOne RC 1 and RC 2, respectively, support Rate Set 1 and Rate Set 2 of cdmaOne One R-FCH and as many as seven... Default screen Composite P1: FDJ book CRC -Wireless November 18, 2001 14:38 Char Count= 264 FIGURE 9.31 Reverse fundamental channel and reverse supplemental code control channel structure for RC 1 and RC 2 of SR 1 9.11.6 Reverse Fundamental Channel and Reverse Supplemental Channel R-FCH and R-SCH operate jointly as specified in RC 3 and RC 4 for SR 1, and in RC 5 and RC 6 for SR 3 These channels use frame... for F-SCCHs, but only for F-FCHs 9 .10. 14 Forward Fundamental Channel and Forward Supplemental Channel F-FCH and F-SCH operate jointly as specified in RC 3, RC 4, and RC 5, for SR 1, and in RC 6, RC 7, RC 8, and RC 9, for SR 3 These channels use frame structures in multiples of 20 ms A 5-ms frame can also be utilized but only by F-FCH (not by F-SCH) In the same way, 40- and the 80-ms frames are used only... April 25, 2002 9:27:36 AM Color profile: Disabled Default screen Composite P1: FDJ book CRC -Wireless November 18, 2001 14:38 Char Count= 264 TABLE 9.17 RC Characteristics for Forward Traffic Channel and Control Channel Data Rates (kbit/s) 38.4 76.8 153.6 307.2 614.4 307.2 614.4 1228.8 921.6 Bits 102 4 102 4 102 4 102 4 102 4 2048 2048 2048 3072 Slots 16 8 4 2 1 4 2 1 2 Coding Rate 1/5 1/5 1/5 1/5 1/3 1/3 1/3... the box present only in RC 5 and RC 9 In Table 9.11, n is the length of the frame in multiples of 20 ms In Figure 9.25, the long code generator runs at a chip rate of 1.2288 Mchip/s for RC 3, RC 4, and RC 5 for SR 1, and at chip rate of 3.6864 Mchip/s for RC 6, RC 7, RC 8, and RC 9 for SR 3 For RC 3, RC 4, and RC 5, the I/Q scrambling bit extractor block extracts the I and Q pairs at a rate given by... Mask u D Decimator 64:1 PCB Gain 800 bit/s M U X SI 0 SQ Decimator 24:1 FIGURE 9.24 Forward fundamental channel and forward supplemental code control channel structure for RC 1 and RC 2 of SR 1 with cdmaOne RC 1 and RC 2, respectively, support Rate Set 1 and Rate Set 2 of cdmaOne One F-FCH and up to seven F-SCCH can be used simultaneously for a forward traffic channel These channels transmit at variable... transmission of higher-level data, control information, and power control information It operates in RC 3, RC 4, and RC 5 for SR 1, and in RC 6, RC 7, RC 8, and RC 9 for SR 3, supporting data rates from 1.05 to 14.4 ksymb/s, depending on the RC There may be one F-DCCH per forward traffic channel It uses frames of 64 128 64 128 256 5 or 20 ms for any of the RCs and Walsh codes Wn , Wn , Wn , Wn , Wn , 128 256... specified in Table 9.12 In Figure 9.26, the long code generator runs at a chip rate of 1.2288 Mchip/s for RC 3, RC 4, and RC 5 for SR 1, and at a chip rate of 3.6864 Mchip/s for RC 6, RC 7, RC 8, and RC 9 for SR 3 For RC 3, RC 4, and RC 5, the I/Q scrambling bit extractor block extracts the I and Q pairs at a rate given by the modulation symbol rate © 2002 by CRC Press LLC E:\Java for Engineers\VP Publication\Java... header (EAH), and the enhanced access data (EAD) Depending on how the access probe is transmitted, three modes of operation are defined: basic access mode (BAM), power-controlled access mode (PCAM), and reservation access mode (RAM) In BAM, the access probe comprises EAP and EAD In PCAM, the access probe consists of three elements: EAP, EAH, and EAD In RAM, the access probe encompasses EPA and EAH To facilitate... (ksymb/s) SR1 172/5 360 /10 172 /10 744/20 360/20 172/20 12 16 12 16 16 12 38.4 38.4 19.2 38.4 19.2 9.6 1× 1× 2× 1× 2× 4× 768 1536 1536 3072 3072 3072 153.6 153.6 153.6 153.6 153.6 153.6 SR3 172/5 360 /10 172 /10 744/20 360/20 172/20 12 16 12 16 16 12 38.4 38.4 19.2 38.4 19.2 9.6 1× 1× 2× 1× 2× 4× 768 1536 1536 3072 3072 3072 153.6 153.6 153.6 153.6 153.6 153.6 Configuration uses a random-access protocol . F-FCHs. 9 .10. 14 Forward Fundamental Channel and Forward Supplemental Channel F-FCH and F-SCH operate jointly as specified in RC 3, RC 4, and RC 5, for SR 1, and in RC 6, RC 7, RC 8, and RC 9,. channel and forward supplemental code control channel structure for RC1andRC2ofSR1. with cdmaOne. RC 1 and RC 2, respectively, support Rate Set 1 and Rate Set 2 of cdmaOne. One F-FCH and up to. 3, RC 4, and RC 5 for SR 1, and at a chip rate of 3.6864 Mchip/s for RC 6, RC 7, RC 8, and RC 9 for SR 3. For RC 3, RC 4, and RC 5, the I/Q scrambling bit extractor block extracts the I and Q pairs