Title :
Interference cancellation method for DS-CDMA multicode-packet transmission
Author :
Suzuki, Yasuo ; Kobayashi, Kiyoshi
Author_Institution :
NTT Wireless Syst. Labs., Kanagawa, Japan
Abstract :
Multicode transmission has been proposed for high-speed DS-CDMA packet-data transmission systems. Transmission performance of such systems is degraded by multipath propagation because the cross-correlation values between the multiple codes are not zero. Although interference cancellers are very effective in this situation, the conventional methods require a great deal of calculation. We propose a fast channel-estimation method and a low-calculation-effort interference cancellation method for the slotted ALOHA multicode-packet transmission system. Computer simulations are performed in the frequency-selective Rayleigh fading model. The channel-estimation ability, the interference cancellation effect, the sufficient cancellation-stage number, and the error correction effect are clarified
Keywords :
Rayleigh channels; access protocols; code division multiple access; interference suppression; multipath channels; packet radio networks; radiofrequency interference; spread spectrum communication; DS-CDMA multicode-packet transmission; channel-estimation method; cross-correlation; error correction effect; frequency-selective Rayleigh fading model; high-speed DS-CDMA packet-data transmission; interference cancellation method; interference cancellers; multipath propagation; multiple codes; slotted ALOHA multicode-packet transmission system; sufficient cancellation-stage number; Amplitude estimation; Computer simulation; Data communication; Degradation; Fading; Frequency; Interference cancellation; Multiaccess communication; Parameter estimation; Signal processing;
Conference_Titel :
Global Telecommunications Conference, 1998. GLOBECOM 1998. The Bridge to Global Integration. IEEE
Conference_Location :
Sydney,NSW
Print_ISBN :
0-7803-4984-9
DOI :
10.1109/GLOCOM.1998.775965
