Title :
Coherent DS-CDMA performance in Nakagami multipath fading
Author :
Eng, T. ; Milstein, L.B.
Author_Institution :
Dept. of Electr. & Comput. Eng., California Univ., San Diego, La Jolla, CA, USA
Abstract :
The coherent 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 os 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 over 50 users may access the channel (assuming 127 chips per bit) simultaneously under typical fading conditions, and can achieve an uncoded BER of 0.01 with an average received signal-to-noise ratio per bit of 10 dB.<>
Keywords :
Rayleigh channels; code division multiple access; coherence; error statistics; fading; multipath channels; pseudonoise codes; receivers; signal detection; spread spectrum communication; Nakagami multipath fading; RAKE receiver; Rayleigh channel; bit error rate performance; coherent DS-CDMA performance; coherent reception; direct sequence-code division multiple access; frequency-selective fading channel; multipath fading; signal-to-noise ratio; Bit error rate; Frequency-selective fading channels; Multiaccess communication; Multipath channels; Rayleigh channels; Signal to noise ratio; Statistics;
Journal_Title :
Communications, IEEE Transactions on
