UTRA TDD模式与时间切换波束形成相结合的WCDMA系统容量

his paper shows that the capacity of WCDMA system can be enlarged further, by combining UTRA（Universal Terrestrial Radio Access） TDD (Time Division Duplex) Mode with time-switching array antennas. If WCDMA systems adopt spatial coding, it will lead to frequent spatial handoff problem. The approach presented by the paper can avoid the 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 UTRA TDD of WCDMA system. The capacity calculating based on WLS multiuser detector in the WCDMA systems is presented. Simulations show that a sectored WCDMA system can be of better SINR and BER performance when the systems are of large number of users.