Title :
Performance analysis of CDMA mobile systems using antenna arrays and multi-user detection
Author :
Mohamed, Nermin A. ; Dunham, James G.
Author_Institution :
Dept. of Electr. Eng., Southern Methodist Univ., Dallas, TX, USA
Abstract :
An antenna array-based receiver for wireless direct sequence-CDMA with coherent multi-user detection has been studied. The receiver consists of a front-end beamformer for every user in the cell and has knowledge of all users´ signature sequences. The beamformer uses the existing code-filtering approach to estimate the desired user channel vector, enhancing its signal and reducing the co-channel interference from other directions. The average uncoded bit error rate (BER) as a function of the number of active users, the average antenna signal-to-noise ratio (SNR), and the number of receiving antennas is examined in a Rayleigh fading channel. Analysis show an increase in system capacity proportional to the number of antennas.
Keywords :
Rayleigh channels; antenna arrays; array signal processing; cellular radio; cochannel interference; error statistics; interference suppression; radio receivers; receiving antennas; signal detection; spread spectrum communication; BER; CDMA mobile systems; Rayleigh fading channel; SNR; antenna array-based receiver; average uncoded bit error rate; cellular radio; co-channel interference reduction; code-filtering; coherent multi-user detection; front-end beamformer; performance analysis; signal processing; signal-to-noise ratio; system capacity; user channel vector; users signature sequences; wireless direct sequence-CDMA; Antenna arrays; Bit error rate; Fading; Interchannel interference; Mobile antennas; Multiaccess communication; Multiuser detection; Performance analysis; Receiving antennas; Signal to noise ratio;
Conference_Titel :
Signals, Systems & Computers, 1998. Conference Record of the Thirty-Second Asilomar Conference on
Conference_Location :
Pacific Grove, CA, USA
Print_ISBN :
0-7803-5148-7
DOI :
10.1109/ACSSC.1998.751640
