基于空时分组码的Pre-RAKE算法

Pre-RAKE Algorithm Based on Space Time Block Coding

为克服无线传输中多径衰落效应以及简化接收机的设计,针对TDDCDMA的特点,提出了将Pre-RAKE技术与空时分组码STBC(spacetimeblockcode)结合的方法,并进行了理论分析和仿真,研究了移动速度对误码率BER性能的影响,结果证明了Pre-RAKE可以显著地提高STBC在多径衰落下的BER性能,而与RAKE方案相比,性能差别不大.

An enhanced STBC algorithm by Pre-Rake technique is proposed for the time-division duplex (TDD) CDMA system. By theoretical analysis and simulation, the new algorithm achieves both transmit diversity gain and multipath diversity gain. Further more, Pre-RAKE simplifies the receiver of mobile unit, it also reduce the multiple-access interference. The effects of vehicular speed are also presented in the paper. Simulation results show that Pre-RAKE scheme gives a close performance to the RAKE combiner.