摘要
在室内密集多径环境下,超宽带信号会产生严重的时间弥散,信号的的传输性能将会下降,R ake接收是提高超宽带接收机性能的重要手段。然而如何确定接收机的叉指数目成为接收机设计过程中的关键问题,基于IEEE 802.15.3a室内超宽带多径信道模型,采用二进制相移键控(BPSK)调制方式时,选用最大比合并(M RC)方式的R ake接收机的超宽带通信系统的性能进行了仿真。仿真得出了最佳的合并叉指数目,结果表明在最佳的合并叉指数目情况下的系统性能较其它叉指数情况下的系统性能更为优越,验证了选取此叉指数目的有效性。此方法大大有利于R ake接收机的设计。
In indoor environments, ultra-wide band signals suffer from dense muhipath propagation and severer time dispersion ,the transmission performance of signals will be undermined. RAKE reception is an important way to boost the performance of ultra-wide band receivers. But how to determine the fingers of receiver becomes a critical issue in receiver design. Based on the indoor multipath channel model of the IEEE 802. 15. 3a, performance of RAKE receiver in UWB communication system under BPSK modulation using MRC is simulated. The optimum finger is obtained by computer simulation. Simulation result shows that it can get better performance using the optimum finger than others. The validity by choosing the optimum finger is validated. This method is more beneficial to the device of RAKE receiver.
出处
《桂林电子科技大学学报》
2006年第6期425-429,共5页
Journal of Guilin University of Electronic Technology
