专利快速检索-快速检索全球专利，免费商用专利数据库-IPRDB

1. 发明授权

US4090137A System for compensating cross-polarized waves to attenuate crosstalk 失效
标题翻译：用于补偿交叉极化波以衰减串扰的系统
公开(公告)号：US4090137A
公开(公告)日：1978-05-16
申请号：US663221
申请日：1976-03-03
申请人： Shoji Soma , Ikuro Sato
发明人： Shoji Soma , Ikuro Sato
IPC分类号： H04J11/00 , H04B7/00 , H04B1/00
CPC分类号： H04B7/002
摘要： Polarization distortion experienced by cross-polarized waves is corrected to reduce crosstalk by transmission of pilot signals representing each of the cross-polarized waves, reception of the pilot signals and, based upon their vector values, adjustment of variable phase shifter circuits and variable attenuator circuits to minimize crosstalk effect. Received cross-polarized waves initially undergo phase compensation and are thereafter separated, amplified and then undergo a selected amount of attenuation, based on the received pilot signals, whereupon the attenuated signal of one polarized wave is mixed with the other polarized wave to eliminate the crosstalk components from each of the polarized waves. An additional phase shift adjustment may also be provided for after the cross-polarized waves undergo preamplification. The phase shifting circuits are also adjusted by the control circuits in accordance with the values of the received pilot signals.Preadjustment of cross-polarized waves may be undertaken prior to transmission thereof so that the overall effect of the adjustment of phase and amplitude prior to transmission and the polarization distortion occurring as a result of transmission offset one another to thereby deliver cross-polarized signals to a receiver in which cross-talk is substantially attenuated without further treatment of the cross-polarized waves at the receiver end. The level of phase and amplitude preadjustment at the transmitter is determined by the receipt of pilot signals from the transmitter of the remote transmitter-receiver in communication therewith.
摘要翻译：校正由交叉极化波经历的极化失真，以通过传输代表每个交叉极化波的导频信号，导频信号的接收以及根据它们的矢量值来调节可变移相器电路和可变衰减器电路来减少串扰以减少串扰效应。接收的交叉极化波最初进行相位补偿，然后根据接收到的导频信号进行分离，放大然后进行选定量的衰减，由此将一个极化波的衰减信号与另一个极化波混合以消除串扰来自每个偏振波的分量。在交叉极化波经过预放大之后，还可以提供附加的相移调整。移相电路也根据接收到的导频信号的值由控制电路进行调整。

IPRDB

热门服务

关于我们

友情链接

联系方式