摘要
在OFDM系统中,时域均衡器用来抵消因循环前缀长度不足而引起的码间串扰。本文提出了一种新的时域均衡器的设计方法,该方法同时考虑了码间串扰和噪声对传输速率的影响。最佳均衡器的系数通过快速傅立叶变换在频域进行计算,并可通过求取矩阵的特征向量来获得。仿真结果表明所提出来的方法能有效地提高系统传输速率。
Time-domain equalizer (TEQ) is an effective technique to combat ISI caused by inadequate circular prefix (CP) length in OFDM systems. In this paper, a new method for the design of TEQ is proposed. By means of this method, both the inter-symbol interference (ISI) and the noise power are minimized. The optimal filter coefficients are calculated in the frequency domain by FFT and are derived from an eigenvector of a matrix. Simulation results show that the bit rate can be increased by the proposed method.
出处
《电路与系统学报》
CSCD
2004年第6期109-112,共4页
Journal of Circuits and Systems
基金
教育部科学技术研究重点资助项目(03035)
国家自然科学基金项目(60372097)
关键词
时域均衡器
OFDM
码间串扰
time domain equalizer
OFDM
inter-symbol interference
