摘要
TD-LTE接入方式、可变大带宽等新技术的运用,对测试仪表接收端性能提出了很高的要求,特别是如何在大带宽下提高接收灵敏度成为设计重点和难点。基于本振馈通抵消技术,设计了一种高灵敏度TD-LTE通信接收机,降低了本振信号馈通,避免了本振馈通引起的杂散、噪声等问题,从而提升了接收机的灵敏度和动态范围。对接收机的测试和理论对比表明,该接收机具有结构简单、易仿真、高指标等特点,可以推广到各种通信制式的测试设备、基站等产品中,具有广泛应用前景。
With the new techniques'application,such as TD-LTE access and variable wide bandwidth technique etc.,it requests the high performance of test instrument receiver.How to improve the receiver's sensitivity,especially under condition of wide bandwidth,becomes to the crucial and difficult points of its design.Based on the local oscillator(LO)feed-through offset technique,we have designed a high sensitivity receiver for TD-LTE communication,which can decrease feed-through of LO signal,avoid the spurious and noise problems produced by LO feed-through.Thus,it can promote the sensitivity and dynamic range greatly.The results of tests and theory analysis indicate that it can be extend to use for various modes communication test equipment and will have a great application prospect,because of its characters such as simple structure,easy to simulate,high performance and so on.
作者
凌云志
LING Yun-zhi(The 41th Research Inztitute of CETC,Bengbu 233006,China)
出处
《微波学报》
CSCD
北大核心
2012年第6期84-88,共5页
Journal of Microwaves
基金
国家科技重大专项(2011ZX03001-003-01)
关键词
TD—LTE通信
超外差接收机
本振馈通抵消技术
射频输入动态范围
射频带宽
接收灵敏度
TD-SCDMA long term evolution communication
super heterodyne receiver
LO feed-through offset technique
RF dynamic input range
RF bandwidth
receiving sensitivity
