Code Division Multiple Access (CDMA) phần 10 pot

... busy tone multiple access (DBTMA)—a multiple access control scheme for ad hoc networks,” IEEE Transactions on Communications, vol. 50, pp. 975–985, June 2002.doi :10. 1109 /TCOMM.2002 .101 0617 [18] ... correlation between the lth path of the kth user and the mth path of 10 20 30 40 50 60 70 80 90 10 - 6 10 - 5 10 - 4 10 - 3 10 - 2 10 - 1 10 0 Probability of bit error...

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... MOBK023-Buehrer.cls September 28, 2006 15:54 SPREAD SPECTRUM TECHNIQUES FOR CODE DIVISION MULTIPLE ACCESS 47 0 5 10 15 20 25 30 10 −4 10 −3 10 −2 10 −1 10 0 E b / N o (dB) Probability of bit error AWGN Rayleigh−−exact ... 2006 15:54 44 CODE DIVISION MULTIPLE ACCESS (CDMA) 0 0.5 1 1.5 2 2.5 3 3.5 4 10 −8 0 0.5 1 1.5 2 2.5 3 3.5 4 10 −8 0 0.5 1 1.5 2 2.5 3 3...

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... along with FER-based power control [103 , 106 , 107 ]. P1: IML/FFX P2: IML MOBK023-05 MOBK023-Buehrer.cls September 28, 2006 15:56 142 CODE DIVISION MULTIPLE ACCESS (CDMA) decreasing received signal ... intervals. P1: IML/FFX P2: IML MOBK023-05 MOBK023-Buehrer.cls September 28, 2006 15:56 146 CODE DIVISION MULTIPLE ACCESS (CDMA) where p = [P 1 , P 2 , P K ] and X k,m...

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... 64 2.8 Multiple Access Performance of Frequency-Hopped Code Division Multiple Access 67 2.9 Summary 71 3. Cellular Code Division Multiple Access 73 3.1 Principles of Cellular Code Division Multiple ... 22 2. Spread Spectrum Techniques for Code Division Multiple Access 23 2.1 Forms of Code Division Multiple Access 23 2.2 Direct Sequence Code Divisio...

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... MOBK023-Buehrer.cls September 28, 2006 15:54 16 CODE DIVISION MULTIPLE ACCESS (CDMA) 1.2.1 ALOHA The most common contention-based methods are random access methods. The first random access method was developed by ... Techniques for Code Division Multiple Access In the previous chapter, we reviewed the basic concepts of multiuser communications and the multiple access...

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... TECHNIQUES FOR CODE DIVISION MULTIPLE ACCESS 57 0 5 10 15 10 - 7 10 - 6 10 - 5 10 - 4 10 - 3 10 - 2 10 - 1 10 0 Probability of error E b / N 0 (dB) Rayleigh result B = CW tone B = 25MHz B = 100 MHz B ... MOBK023-Buehrer.cls September 28, 2006 15:54 52 CODE DIVISION MULTIPLE ACCESS (CDMA) 0 5 10 15 20 25 30 10 - 6 10 - 5 10 - 4 10 - 3 10 - 2...

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... IML MOBK023-03 MOBK023-Buehrer.cls September 28, 2006 15:55 CELLULAR CODE DIVISION MULTIPLE ACCESS 77 10 - 1 10 0 10 1 10 2 10 3 10 - 3 10 - 2 10 - 1 10 0 SIR Probability that SIR exceeds abscissa Simulated Log-normal ... IML MOBK023-02 MOBK023-Buehrer.cls September 28, 2006 15:54 68 CODE DIVISION MULTIPLE ACCESS (CDMA) 10 15 20 25 30 35 10 - 6 10...

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... MOBK023-Buehrer.cls September 28, 2006 15:55 100 CODE DIVISION MULTIPLE ACCESS (CDMA) 10 12 14 16 18 20 22 24 26 10 - 5 10 - 4 10 - 3 10 - 2 10 - 1 10 0 Number of CEs Probability of blocking Load ... IML MOBK023-03 MOBK023-Buehrer.cls September 28, 2006 15:55 104 CODE DIVISION MULTIPLE ACCESS (CDMA) 0 0.2 0.4 0.6 0.8 1 1.2 1.4 1.6 1.8 2 10 - 2 10 -...

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... MOBK023-Buehrer.cls September 28, 2006 15:55 114 CODE DIVISION MULTIPLE ACCESS (CDMA) Node 1 Node 2 Node 3 Node 4 Node 5 Node 6 Node 7 Common code Common code C o d e # 4 C o d e # 2 Primary collision Secondary collision FIGURE ... MOBK023-Buehrer.cls September 28, 2006 15:55 118 CODE DIVISION MULTIPLE ACCESS (CDMA) indicator of the success or failure of packet...

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... MOBK023-Buehrer.cls September 28, 2006 15:56 158 CODE DIVISION MULTIPLE ACCESS (CDMA) 0 1 2 3 4 5 6 7 8 9 10 10 - 6 10 - 5 10 - 4 10 - 3 10 - 2 10 - 1 E b /N 0 (dB) Probability of error Conventional Decorrelator SIC PIC MMSE Decision ... MOBK023-Buehrer.cls September 28, 2006 15:56 162 CODE DIVISION MULTIPLE ACCESS (CDMA) 0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0...

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