Title :
Transmission performance improvement with burst error reduction method in CDMA systems
Author :
Tokuda, Kiyohito ; Shiraki, Yuichi ; Kawakami, Eiichiro ; Suzuki, Takao
Author_Institution :
Lab. of Electron. & Commun. Syst., Oki Electr. Ind. Co. Ltd., Tokyo, Japan
Abstract :
This paper presents performance evaluation results of a burst error reduction method (BERM) used in CDMA systems based on direct sequence spread spectrum (DS/SS). The BERM is used with anti-fading technologies including diversity reception, transmitting power control (PC) and interleavers and the de-interleavers for error control. Compared with the case of 1 path diversity (PD) branch and the normalized low PC rate of 10, a fading range suppression effect of 25 dB for baseband demodulated signals is obtained with 3 PD branches, a normalized PC rate of 100 and a PC step of 1 dB. A 1/15 reduction effect of the average fade duration of -10 dB is also achieved with an interleaver length of 5 msec and a PC step of 0.5 dB
Keywords :
code division multiple access; demodulation; diversity reception; error correction codes; fading; interleaved codes; power control; pseudonoise codes; spread spectrum communication; telecommunication control; CDMA systems; DS-SS; antifading technologies; average fade duration; baseband demodulated signals; burst error reduction method; deinterleavers; direct sequence spread spectrum; diversity reception; error control; fading range suppression effect; interleaver length; interleavers; path diversity; transmission performance; transmitting power control; Degradation; Diversity reception; Error correction; Fading; Frequency; Interleaved codes; Multiaccess communication; Multipath channels; Power control; Signal to noise ratio;
Conference_Titel :
Universal Personal Communications. 1995. Record., 1995 Fourth IEEE International Conference on
Conference_Location :
Tokyo
Print_ISBN :
0-7803-2955-4
DOI :
10.1109/ICUPC.1995.496895
