Title :
On the capacity of DS-CDMA systems in a Nakagami multipath channel
Author :
Eng, Thomas ; Milstein, Laurence B.
Author_Institution :
Dept. of Electr. Comput. Eng., California Univ., San Diego, La Jolla, CA, USA
Abstract :
The coherence reception of direct-sequence/code-division multiple-access (DS/CDMA) signals in a multipath fading channel is considered. The channel model assumes independent paths with Nakagami fading statistics; this model includes the Rayleigh channel as a special case and is a reasonable model for a frequency-selective fading channel. The bit error rate (BER) performance of a RAKE receiver under various multipath fading conditions is derived and evaluated. The results indicate that, when channel coding is used, over 40 users may access the channel (assuming a processing gain of 127) simultaneously under typical fading conditions, and can achieve a BER of 0.001 with an average received signal-to-noise ratio (SNR) per bit of 5 dB
Keywords :
channel capacity; code division multiple access; fading; mobile radio systems; spread spectrum communication; telecommunication channels; BER performance; DS-CDMA systems; Nakagami multipath channel; RAKE receiver; Rayleigh channel; SNR; bit error rate; channel coding; coherence reception; frequency-selective fading channel; mobile communications; multipath fading; spread spectrum communications; Bit error rate; Channel coding; Fading; Frequency; Multiaccess communication; Multipath channels; Random variables; Rayleigh channels; Statistics; Transmitters;
Conference_Titel :
Military Communications Conference, 1992. MILCOM '92, Conference Record. Communications - Fusing Command, Control and Intelligence., IEEE
Conference_Location :
San Diego, CA
Print_ISBN :
0-7803-0585-X
DOI :
10.1109/MILCOM.1992.244080
