Title :
A study on quasi-synchronous CDMA based on selected PN signature sequences
Author :
Kuno, Seiji ; Yamazato, Takaya ; Katayama, Masaaki ; Ogawa, Akira
Author_Institution :
Dept. of Inf. Electron., Nagoya Univ., Japan
Abstract :
The performance of quasi-synchronous CDMA (QS-CDMA) system, which can allow an increased timing error in synchronized access, is discussed. The QS-sequences are selected from an M-sequence set or a Gold-sequence set considering the cross-correlation property, and the average BER is calculated for the system with QS-sequences. As a result, the average BER of the system with QS-sequences is improved considerably compared with asynchronous CDMA when the access timing error is within a few chip durations
Keywords :
code division multiple access; error statistics; pseudonoise codes; spread spectrum communication; synchronisation; Gold-sequence; M-sequence; PN signature sequences; QS-CDMA; QS-sequences; average BER; chip durations; cross-correlation; quasi-synchronous CDMA; spread spectrum modulation; synchronized access; timing error; Additive white noise; Base stations; Bit error rate; Code division multiplexing; Degradation; Fading; Interchannel interference; Modulation coding; Multiaccess communication; Timing;
Conference_Titel :
Spread Spectrum Techniques and Applications, 1994. IEEE ISSSTA '94., IEEE Third International Symposium on
Conference_Location :
Oulu
Print_ISBN :
0-7803-1750-5
DOI :
10.1109/ISSSTA.1994.379539
