高数据率无线个域网超宽带接收机性能分析
Performance Analysis of Ultra Wideband Receivers for High Data Rate Wireless Personal Area Network System
摘要：
针对高数据率的超宽带通信系统，本文对Rake、MMSE和Rake-MMSE接收机的性能进行了比较。进一步对Rake-MMSE时域均衡器进行了详细的研究，考虑了所有重要的参数，如Rake指和均衡器抽头的数量对出错率性能的影响。该接收机通过同时利用Rake和均衡器结构来对抗符号间干扰。在IEEE 802.15.3a定义的UWB信道模型上，利用MATLAB仿真研究了该算法的出错率性能。仿真结果表明，Rake-MMSE接收机的误比特率出错率明显优于Rake接收机和MMSE均衡器。对非视距室内信道模型的研究表明，与CM 4信道模型相比，具有较小扩展的CM 3模型的Rake-MMSE（LE和DFE）的比特出错率性能得到改善。研究表明，对于工作在中低信噪比的MMSE均衡器，Rake分支数目是提高系统性能的主要因素，而在高信噪比时，均衡器抽头数目对降低出错率起着更为重要的作用。
英文摘要：
For high data rate ultra wideband communication system, performance comparison of Rake, MMSE and Rake-MMSE receivers is attempted in this paper. Further a detail study on Rake-MMSE time domain equalizers is carried out taking into account all the important parameters such as the effect of the number of Rake fingers and equalizer taps on the error rate performance. This receiver combats inter-symbol interference by taking advantages of both the Rake and equalizer structure. The bit error rate performances are investigated using MATLAB simulation on IEEE 802.15.3a defined UWB channel models. Simulation results show that the bit error rate probability of Rake-MMSE receiver is much better than Rake receiver and MMSE equalizer. Study on non-line of sight indoor channel models illustrates that bit error rate performance of Rake-MMSE (both LE and DFE) improves for CM3 model with smaller spread compared to CM4 channel model. It is indicated that for a MMSE equalizer operating at low to medium SNR values, the number of Rake fingers is the dominant factor to improve system performance, while at high SNR values the number of equalizer taps plays a more significant role in reducing the error rate.
机构、总结、中文摘要均由AI分析而来，可能存在错误，请以论文正文为准。
