High capacity high spectral efficiency transmission techniques in wireless broadband systems

... HIGH CAPACITY HIGH SPECTRAL EFFICIENCY TRANSMISSION TECHNIQUES IN WIRELESS BROADBAND SYSTEMS ZHOU KAINAN (B Eng., Beijing University of Posts and Telecommunications., P R China) A THESIS ... extensive study on the high capacity high spectral efficiency transmission techniques in wireless broadband systems supporting multiclass services In Chapter 2, w...

Ngày tải lên: 15/09/2015, 17:11

... ADAPTIVE TRANSMISSION TECHNIQUES IN WIRELESS FADING CHANNELS CHEN XUN A THESIS SUBMITTED FOR THE DEGREE OF MASTER OF ENGINEERING DEPARTMENT OF ELECTRICAL & COMPUTER ENGINEERING NATIONAL ... two independent cataloging mechanisms are set up The type of the fading is said to be frequency-selective fading or flat fading based on delay spread, while it is said to be fast fading...

Ngày tải lên: 26/09/2015, 11:07

... DCS (17 10 -18 80 MHz), PCS (18 50 -19 90 MHz), UMTS 210 0 (19 20- 217 0 MHz), WLAN + Bluetooth (2400-2480 MHz), WiMAX (2500-2690 MHz), HiperLAN/2 in Europe ( 515 0-5350 / 5470-5725 MHz) and IEEE 802 .11 a in ... Between 802 .16 e & 802 .11 s Tarek Bchini and Mina Ouabiba 295 297 Inter-Domain Handover in WiMAX Networks Using Optimized Fast Mobile IPv6 319 Seyyed Masoud Seyyedoshohad...

Ngày tải lên: 20/06/2014, 23:20

... 1600–3000 58.5, 1 620 29 60 58 .2, 1630 29 70 7.5, 4880– 526 0 5.8, 5180–5490 16.1, 5040–5 920 Fig 15(b) 26 26 26 2 20 20 20 - 6.0 8.0 10 61.4, 1570 29 60 49.4, 1600 26 50 51 .2, 1570 26 50 13 .2, 520 0–5935 10.0, ... 3.3 2. 3 3.3 2. 9 3.5 1.6 1.8 1.1 1.8 1.3 2. 2 2. 1 Table Summarized results of the antenna gains Antenna Gain (dBi) Iteration 3.1 2. 5 3.3 2. 1 3.3 2. 8 3.5 1.5...

Ngày tải lên: 20/06/2014, 23:20

... the reflector and the feed line is influential in determining the operating frequency of the antenna If the height is larger than 52 Advanced Transmission Techniques in WiMAX its optimized height, ... results in different gain and HPBW By turning ON the first switch of the EBRS, gain and HPBW of 4.85 dB and -65° to 70° are obtained respectively, as shown in figure 3( a) While...

Ngày tải lên: 20/06/2014, 23:20

... 300 40 0 500 600 Time(sec) 700 800 900 1000 (3.1) 86 Advanced Transmission Techniques in WiMAX -9 14 jitter mean x 10 mean over 64 seconds 12 10 me -2 -4 -6 2000 40 00 6000 8000 10000 12000 140 00 ... oscillating frequency controlling algorithm  84 Advanced Transmission Techniques in WiMAX 3.2 Clock reference controlling scheme The controlling scheme is a hybrid one...

Ngày tải lên: 20/06/2014, 23:20

... Amplitude Modulation Single Input Multiple Output Single Input Single Output Spatial Multiplexing Signal To Noise Ratio 1 26 STBC TACS TDD UPA ZF Advanced Transmission Techniques in WiMAX Space-Time ... because both of them are required for 4TX combining 138 Advanced Transmission Techniques in WiMAX Symbol level Buffer Subpacket Combining Soft Bit demapping    h0 s ...

Ngày tải lên: 20/06/2014, 23:20

... multiplied with a part of the frame This frame can be 218 Advanced Transmission Techniques in WiMAX in Gaussian shape, cosine, Kaiser or Hanning window, respectively In companding method the OFDM ... signal into digital format and then expands it The companding method has application in speech processing where high peaks occur infrequently In PTS, by partitioning the input...

Ngày tải lên: 20/06/2014, 23:20

... defined in OFHS instead of reactive mode defined in the RFC5270 The semi-predictive mode procedure is shown in Fig Fig OFHS Handover Procedure, Semi-Predictive Mode Inter-Domain Handover in WiMAX ... receiving the FBack, the mobile node link layer is signalled by its network layer through a LSW to manage handover by sending a Mobile 326 Advanced Transmission Techniques in W...

Ngày tải lên: 20/06/2014, 23:20

... Uptake of prevention of mother to child transmission interventions in Kenya: health systems are more influential than stigma John Kinuthia1§, James N Kiarie1,5, Carey Farquhar2,3,5, ... systems in non -uptake of prevention of mother to child transmission (PMTCT) of HIV-1 interventions: we conducted cross-sectional assessment of all con...

Ngày tải lên: 20/06/2014, 08:20

... EURASIP Journal on Wireless Communications and Networking Precoding in Wireless Systems, and Optimization Techniques for Scheduling in Wireless Systems Three papers are included in each of the first ... approach Optimization Techniques for Precoding and Beamforming in Wireless Systems In this part, it is demonstrated how the optimization techniques can be used for...

Ngày tải lên: 21/06/2014, 22:20

... exploiting multiuser diversity gain In order to achieve such an increase in throughput, radio resources need to be managed in an efficient way by adapting to the instantaneous conditions of radio links ... variable for user l in BS n using modulation q on subcarrier k n is omitted in single-cell or distributed systems; k is omitted in single carrier systems; q is omitted in...

Ngày tải lên: 10/09/2015, 15:49

... teachers of English at Tam Duong high school, the investigator can see clearly the current situation of teaching and learning English Listening skills are by both the teachers and the students considered ... skills At the end of the research, the investigator proposed some suggestions to improve the learning and teaching listening skill at...

Ngày tải lên: 15/07/2015, 12:55

... specifically aims at: - Investigating the present situation of teaching reading comprehension including the pre- reading stage of the 12th form students in reading lessons at Xuan Truong B High school ... pre- reading stage aims at introducing and arousing interest in the topic, motivating learners by giving a reason for reading and providing...

Ngày tải lên: 16/07/2015, 08:43