Coherent Hybrid DS-FFH CDMA with Adaptive Interference Cancelling for Cellular Mobile Communications (Special Issue on Adaptive Signal Processing in Mobile Radio Communications)

概要

論文の詳細を見る
This paper proposes Coherent-HYBrid Direct-Sequence Fast-Frequency-Hopping (CHYB-DS-FFH) CDMA with Adaptive Interference Cancelling (AIC) for cellular mobile communications. The features of CHYB-DS-FFH are symbol-by-symbol frequency diversity and low chip-rate DS multiplexing; both of which are based on a coherent FFH modulation and demodulation scheme. The combination of coherent FFH, space diversity, and AIC is very effective for reducing the performance degradation due to interference. Computer simulations demonstrate BER performance of a 2 hop 500-kHz-interval frequency hopping system using (i) a linear canceller or (ii) a nonlinear canceller. Both systems employ the two branch space diversity reception of 10 kb/s QPSK with FFH over a 1 MHz system bandwidth. In quasi-static channels, the average BER performance is 10^<-2> with average E_b/N_o less than 8dB. In dynamic fading channels under full interference conditions, CHYB-DS-FFH with the linear adaptive interference canceller realizes a BER of 10^<-2> at the average E_b/N_o of 15 dB with maximum Doppler frequency f_D of 5 Hz, whereas CHYB-DS-FFH with the non-linear adaptive interference canceller achieves the same BER at the average E_b/N_o of 15 dB with f_D equal to 30 Hz.
社団法人電子情報通信学会の論文
1994-05-25