Theory and applications of ofdm and cdma wideband wireless communications phần 5 ppsx

... 162 OFDM 0 50 100 150 200 250 300 350 400 450 50 0 50 –40 –30 –20 (a) ( b ) –10 0 10 Normalized frequency fT Power spectrum (linear) 0 50 100 150 200 250 300 350 400 450 50 0 50 –40 –30 –20 –10 0 10 Normalized ... (b) and the amplitude (c) of an OFDM signal of average power one. –3 –2 .5 –2 –1 .5 –1 –0 .5 0 0 .5 1 1 .5 2 0.001 0.003 0.01 0.02 0. 05 0.10 0. 25 0 .50 0...

Ngày tải lên: 09/08/2014, 19:22

... (1.17) Theory and Applications of OFDM and CDMA Wideband Wireless Communications Henrik Schulze and Christian L ¨ uders Both of Fachhochschule S¨udwestfalen Meschede, Germany x PREFACE and modulation. ... examples of CDMA applications we discuss the most important systems already mentioned, namely, GPS, cdmaOne (IS- 95) , cdma2 000 and UMTS with its two tran...

Ngày tải lên: 09/08/2014, 19:22

... code signals. We Theory and Applications of OFDM and CDMA Henrik Schulze and Christian L ¨ uders  20 05 John Wiley & Sons, Ltd 266 CDMA      t T c T S g k (t) Figure 5. 1 Signature pulse ... highly −40 − 35 −30 − 25 −20 − 15 −10 5 0 5 10 10 −2 10 −1 10 0 X [dBm] p(SIR ≤ X ) no PC PC Figure 5. 17 Probability function of the uplink SIR with and without p...

Ngày tải lên: 09/08/2014, 19:22

... fluctuations of the received time signal for ν max = 50 Hz, corresponding for example, to a transmit signal at 900 MHz for a vehicle Theory and Applications of OFDM and CDMA Henrik Schulze and Christian ... independent, so that their pdfs can be factorized. MOBILE RADIO CHANNELS 53 –2 .5 –2 –1 .5 –1 –0 .5 0 0 .5 1 1 .5 2 2 .5 –2 –1 .5 –1 –0 .5 0 0 .5 1 1 .5 I-com...

Ngày tải lên: 09/08/2014, 19:22

... is often convenient to work with code words of finite length, but it is not necessary, and the length is not determined by the code. Theory and Applications of OFDM and CDMA Henrik Schulze and ... in the OFDM system DRM (Digital Radio Mondiale). The iterative decoding of a convolutionally coded QAM system with OFDM will be discussed in Subsection 4 .5. 2. 3.1 .5 Log-...

Ngày tải lên: 09/08/2014, 19:22

... 0, 1, 2, 3, 4, 5, 6 is defined by the addition table + 123 456 1 23 456 0 2 3 456 01 3 456 012 4 56 0123 5 601234 6 0123 45 and the multiplication table 123 456 2461 35 36 251 4 4 152 63 53 1642 654 321 Note that ... matched to the channel and parallelize the given data stream in an appropriate way. Theory and Applications of OFDM and CDMA Henrik Schulze and Chris...

Ngày tải lên: 09/08/2014, 19:22

... 2 K = 153 6, L = 80 OFDM with 16-QAM and R c = 0 .5 CE ideal CE real Figure 4.67 Simulation of a wideband OFDM system with 16-QAM for a moderately fast and frequency nonselective channel. OFDM 241 0 ... t m /∆ = 0.0417 B/f corr = 0 .5 T F /t corr = 0.8 K = 48, L = 80 OFDM with 16- QAM and R c = 0 .5 Figure 4.74 Simulation of narrowband OFDM for a slow and flat channe...

Ngày tải lên: 09/08/2014, 19:22

... in Figure 5. 17. CDMA 299 2 3 4 5 6 7 8 9 10 0 0 .5 1 1 .5 2 2 .5 H SHO [dB] B = 40 dB B = 30 dB Fraction of connections in SHO mode Mean number of BSs per connections Figure 5. 23 Soft handover ... number of base stations involved in a soft handover should be kept small. To illustrate this soft handover effort, Figure 5. 23 shows the fraction of connections involved in a...

Ngày tải lên: 09/08/2014, 19:22

... ssc 1,14 ssc 1, 15 psc 2 ssc 2,1 ssc 2,2 ssc 2,14 ssc 2, 15 psc 8 ssc 8,1 ssc 8,2 ssc 8,14 ssc 8, 15 psc 51 2 ssc 51 2,1 ssc 51 2,2 ssc 51 2,14 ssc 51 2, 15 psc 50 5 ssc 50 5,1 ssc 50 5,2 ssc 50 5,14 ssc 50 5, 15 Scrambling ... While the WCDMA and TD -CDMA- based modes use a chip rate of 3.84 Mchip/s and a carrier separation of about 5 MHz, the chip rate for...

Ngày tải lên: 09/08/2014, 19:22

... INDEX Nyquist base, 9 criterion, 10 pulse, 9 OFDM, 1, 1 45 OFDM and nonlinearities, 166 symbol, 159 OFDM with convolutional coding, 208, 213 OFDM with QAM, 213 OFDM with QPSK, 208 Omni cell, 270 Open-loop ... 384, 391 Channel coding, 93, 2 45 Theory and Applications of OFDM and CDMA Henrik Schulze and Christian L ¨ uders  20 05 John Wiley & Sons, Ltd Channel...

Ngày tải lên: 09/08/2014, 19:22