Title :
New bounds on RAKE structures for DS-CDMA over frequency-selective Rayleigh fading channels
Author :
Calvo, Sergio ; Vazquez, Gregori
Author_Institution :
Dept. of Signal Theory & Commun., Polytech. Univ. of Catalonia, Barcelona, Spain
Abstract :
An upper bound is derived for the probability of error in an asynchronous binary direct-sequence spread-spectrum multiple-access communications system operating over frequency selective Rayleigh fading channels. A coherent RAKE receiver with predetection selective diversity combining is considered. The performance of a multipath-combining receiver is determined for the case of multiple interfering transmitters. Furthermore, the performance of the system is determined in terms of parameters of the signature sequences. These parameters can be used as guides in selecting sequences for the system. The bounds agree with the exponential portion of a normal distribution in which the interfering interference components subtract from the signal amplitude. The results obtained are verified by simulation
Keywords :
Rayleigh channels; code division multiple access; diversity reception; error statistics; fading; multipath channels; normal distribution; probability; pseudonoise codes; radio receivers; radio transmitters; radiofrequency interference; signal detection; spread spectrum communication; DS-CDMA; RAKE structures; asynchronous binary DS-SS; coherent RAKE receiver; direct-sequence spread-spectrum; error probability bound; frequency-selective Rayleigh fading channels; interfering interference components; multipath-combining receiver performance; multiple interfering transmitters; multiple-access communications system; normal distribution; predetection selective diversity combining; signal amplitude; signature sequences; simulation; system performance; Diversity reception; Fading; Frequency; Gaussian distribution; Multiaccess communication; Multipath channels; RAKE receivers; Spread spectrum communication; Transmitters; Upper bound;
Conference_Titel :
Statistical Signal and Array Processing, 1996. Proceedings., 8th IEEE Signal Processing Workshop on (Cat. No.96TB10004
Conference_Location :
Corfu
Print_ISBN :
0-8186-7576-4
DOI :
10.1109/SSAP.1996.534928
