Title :
A practical RAKE combining scheme for synchronous CDMA systems
Author :
Li, Wei ; Yang, Hong-Chuan ; Gulliver, T. Aaron
Author_Institution :
Dept. of Electr. & Comput. Eng., Victoria Univ., BC, Canada
Abstract :
In this paper we consider the performance of a RAKE receiver in a code division multiple access (CDMA) system employing maximal-ratio combining. A simple select and combine algorithm is introduced in which the RAKE receiver combines only the synchronization path and those resolvable paths with a signal-to-noise ratio (SNR) larger than a given threshold. We analyze its performance based on moment generating functions of the SNR of the combined signal. We study the cases with equal and unequal average SNR for different diversity paths. In particular, closed-form expressions for the average combined SNR and symbol error probability with the proposed RAKE receiver over block fading channels are derived. We also study the outage probability of the system and the number of channels estimated. Numerical results are given to illustrate the analytical results.
Keywords :
channel estimation; code division multiple access; diversity reception; error statistics; fading channels; radio receivers; synchronisation; RAKE receiver; SNR; block fading channels; channel estimation; code division multiple access; diversity paths; maximal-ratio combining; moment generating functions; outage probability; performance; resolvable paths; select and combine algorithm; signal-to-noise ratio; symbol error probability; synchronization path; synchronous CDMA systems; Code division multiplexing; Diversity reception; Fading; Multiaccess communication; Multipath channels; Performance analysis; Signal analysis; Signal generators; Signal resolution; Signal to noise ratio;
Conference_Titel :
Wireless Communications and Networking Conference, 2005 IEEE
Print_ISBN :
0-7803-8966-2
DOI :
10.1109/WCNC.2005.1424617
