WCDMA中两种天线闭环发分集模式的性能分析

Performance Analysis of Two Closed Loop Antenna Transmit Diversity Modes for WCDMA

本文推导了有精确信道估计时 ,各种常见分集方法在平坦瑞利衰落信道中的理论性能 ,通过对有效信噪比的简单替换我们将这些结论推广到考虑实际信道估计误差的情况 ,仿真结果验证了这些公式的正确性 .据此我们可得到两种闭环发分集模式的理论性能界 。

Simple close form expressions for different diversity methods′ theoretical performance are derived in this paper under the assumption of perfect channel estimation.When channel estimation error should be considered,we can simply substitute the original Es/No in each expression with a new effective value.Simulation results validate the correction of this method.Based on the performance bounds determined by these new expressions,we study the performance of the two closed loop modes with different Doppler frequency and different processing methods at the UE (user equipment).