摘要
在多通道接收机中,通道的幅相一致性是支持算法性能得到发挥的重要指标。变频通道各级的相位不一致,都会影响通道群时延一致性。级联对时延影响的机理更加复杂,控制各通道之间的时延一致性比较困难。研究电路影响群时延的机理和控制群时延指标,是多通道接收机设计的关键技术之一。因此,分析通道中影响群时延的关键参数,提出了加强电路级间阻抗匹配、结合本振移相网络以及对中频滤波器进行相位校正等改善通道群时延一致性的方法。
In multi-channel receivers, amplitude and phase consistency of channels is an important indicator in supporting of the algorithm performance. Phase inconsistency at every stage in down-converter receiver would affect consistency of the channel group delay. The mechanism of cascade influence on delay is more complicated, and to control the delay consistency between channels becomes fairly difficult. Exploration on the mechanism of group delay and the control of group delay performance is the key to multi-channel receiver design. Therefore, the key parameters in the channel that affect the group delay are analyzed, and the method to improve the consistency of group delay in the channel by enhancing impedance matching
作者
王晓光
WANG Xiao-guang(No.10 Institute of CETC,Chengdu Sichuan 610036,China)
出处
《通信技术》
2018年第10期2297-2304,共8页
Communications Technology
关键词
相位
通带
多通道接收机
移相网络
一致性
phase
passband
multi-channel receiver
phase-shifter network
channel consistency
