A new multiplex-access scheme based on the diversity of autocorrelation

Based on a new diversity, the diversity of autocorrelation, a new multiple-access scheme, called A-CDMA, is presented here. Like WCDMA, it packs high-density information into transmitted signals. Unlike WCDMA, it can block all the ISI and MAI completely under all noise level. The simulation supports the theory and shows that the total interference due to ISI and MAI is reduced to 1% when SNR varies from 1 to 11. By comparison, it outperforms WCDMA by a factor of 9 in the reduction of ISI and MAI. Its overall performance, as measured by BER is better than WCDMA in general, and by 10-20 dB when SNR ranges from 9 dB to 11 dB.