Communication capacity of TD-SCDMA systems

This paper shows that the capacity of TD-SCDMA system can be enlarged further, by adopting time-switching array antennas. The TD-SCDMA systems needn´t have spatial coding, since the spatial coding causes frequent spatial handoff problem. Analyzing the array pattern, we show that the interference of other sectors, also to be MAI, can be effectively suppressed by the array antennas for a sectored TD-SCDMA system. The capacity calculation based on WLS multiuser detector in the TD-SCDMA systems is presented. Simulations show that a TD-SCDMA system with a triply-sectored uplink channel can give a SINR (signal to interference plus noise ratio) and a BER (bit error rate) better than those in non-sectored systems with 10 times as many users.