Code Division Multiple Access (CDMA) phần 6 docx

... September 28, 20 06 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 - 1 10 0 Fast Rayleigh fading channel 0 0.2 0.4 0 .6 0.8 1 1.2 1.4 1 .6 1.8 2 0 1 2 3 Transmit ... September 28, 20 06 15:55 CELLULAR CODE DIVISION MULTIPLE ACCESS 103 0 0.2 0.4 0 .6 0.8 1 1.2 1.4 1 .6 1.8 2 10 - 2 10 - 1 10 0 Slow Rayleigh fading ch...

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... IML/FFX P2: IML MOBK023-05 MOBK023-Buehrer.cls September 28, 20 06 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 0.9 1 10 - 3 10 - 2 10 - 1 10 0 Standard deviation ... IML/FFX P2: IML MOBK023-05 MOBK023-Buehrer.cls September 28, 20 06 15: 56 158 CODE DIVISION MULTIPLE ACCESS (CDMA) 0 1 2 3 4 5 6 7 8 9 10 10 - 6 10 - 5 10 -...

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... Spectrum 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 ... September 28, 20 06 15:54 CONTENTS vii 2 .6 Multiple Access Performance of Direct Sequence Code Division Multiple Access 56 2 .6. 1 Gaussia...

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... MOBK023-Buehrer.cls September 28, 20 06 15:54 10 CODE DIVISION MULTIPLE ACCESS (CDMA) 1 3 5 4 5 4 7 2 6 6 3 5 7 3 4 2 6 7 2 1 1 1 1 1 1 7 6 5 2 3 4 6 5 7 FIGURE 1.4: Classic frequency reuse for ... MOBK023-Buehrer.cls September 28, 20 06 15:54 16 CODE DIVISION MULTIPLE ACCESS (CDMA) 1.2.1 ALOHA The most common contention-based methods are random access me...

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... 28, 20 06 15:54 SPREAD SPECTRUM TECHNIQUES FOR CODE DIVISION MULTIPLE ACCESS 33 TABLE 2.1: Code length N and the number of m-sequences N p (n). nN= 2 n − 1 N p (n) 231 372 415 2 531 6 663 6 7 127 ... IML MOBK023-02 MOBK023-Buehrer.cls September 28, 20 06 15:54 42 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 7 0 0.2 0.4 0 .6 0...

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... P2: IML MOBK023-02 MOBK023-Buehrer.cls September 28, 20 06 15:54 62 CODE DIVISION MULTIPLE ACCESS (CDMA) 0 2 4 6 8 10 12 14 16 18 20 10 - 6 10 - 5 10 - 4 10 - 3 10 - 2 10 - 1 10 0 E b / N o (dB) Probability ... this becomes Z k,i =  (i+1)T+τ k iT+τ k r(t)a k (t −τ k ) cos(ω c t +φ k ) dt (2 .63 ) P1: IML/FFX P2: IML MOBK023-02 MOBK023-Buehrer.cls September 28, 20 06 15:5...

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... September 28, 20 06 15:55 82 CODE DIVISION MULTIPLE ACCESS (CDMA) 3.1.4 Statistical Multiplexing The final fundamental CDMA concept that we will discuss in this section is termed statistical multiplexing, ... IML MOBK023-03 MOBK023-Buehrer.cls September 28, 20 06 15:55 74 CODE DIVISION MULTIPLE ACCESS (CDMA) 0 500 1000 1500 0 0.002 0.004 0.0 06 0.008 0.01 0.012 0.014...

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... 1 (3 .66 a) lim ( I ic +I oc ) →0 η UL = 0 (3 .66 b) P1: IML/FFX P2: IML MOBK023-03 MOBK023-Buehrer.cls September 28, 20 06 15:55 108 CODE DIVISION MULTIPLE ACCESS (CDMA) Now, rearranging (3 .64 ), ... MOBK023-Buehrer.cls September 28, 20 06 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...

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... MOBK023-Buehrer.cls September 28, 20 06 15:55 1 26 P1: IML/FFX P2: IML MOBK023-05 MOBK023-Buehrer.cls September 28, 20 06 15: 56 138 CODE DIVISION MULTIPLE ACCESS (CDMA) 5.4 NON-LINEAR SUB-OPTIMAL RECEIVERS: DECISION ... intervals. P1: IML/FFX P2: IML MOBK023-05 MOBK023-Buehrer.cls September 28, 20 06 15: 56 1 46 CODE DIVISION MULTIPLE ACCESS (CDMA) where p = [P...

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... 2, pp. 36 38, 1998.doi:10.1109/4234 .66 07 96 P1: IML/FFX P2: IML/FFX QC: IML/FFX T1: IML MOBK023-BIB MOBK023-Buehrer.cls September 28, 20 06 17:14 178 CODE DIVISION MULTIPLE ACCESS (CDMA) [69 ] Z. ... MOBK023-Buehrer.cls September 28, 20 06 15: 56 164 CODE DIVISION MULTIPLE ACCESS (CDMA) to make symbol decisions and the received signal can have at most 64 ×4 = 2...

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