LAS-CDMA multi-code detection based on soft demodulation

Next generation mobile communication networks appeal to data and multimedia communications, and require high efficiency and reliability. Multiple transmitting and multiple receiving BLAST system, advanced by Bell Laboratory, was combined with LAS-CDMA multiple access codes, possessing interference free windows IFW. This compound system will greatly increase parallel transportation channels and realize high-speed data transmission. In multi-cell networking circumstances, however, there exists severe inter-antenna interference and adjacent cell interference. To overcome the interferences, the receiver will combine uniform code joint detection with multi-code detection based on soft demodulation to divide the signals effectively. LAS-CDMA parallel transmitting system can realize large capacity and high reliability transportation in two-cell networking. It is an ideal solution for future mobile communication networks.