关键词:长期演进;信道估计;频域均衡;探测参考信号;频选技术 ABSTRACT As LTE been determined the candidate technologies for 4G by ITU(International Telecommunications Union), it has drawn a growing concern and research. Within 20MHz limited spectrum bandwidth, LTE can reach 50Mbps uplink peak rate and downlink 100Mbps peak rate. With the features of fast transfer rates, High system reliability and low equipment complexity, this technology gets the favor of most of the Western main operators and has