发明名称 |
Cross-polarization crosstalk canceller |
摘要 |
A cross-polarization crosstalk canceller is equipped to receive two polarized waves which are orthogonally crossing each other. The cross-polarization interference is eliminated by multiplying the signal received on one side by a compensating coefficient and adding the resulting product to the signal received on the other side. A discrimination error represents the difference between the reception signal after compensation and the identified value thereof. An adder and a subtractor supplies the sum and the difference between the real part and the imaginary part of the discrimination error. A discriminator detects equality between the absolute values of the real part and the imaginary part of the signal received on the interfering polarized wave side and supplies a control signal depending on the quadrant to which the signal belongs. A switch combines and varies a combination of the signs of the outputs of the adder and subtractor in response to the control signal supplied by the discriminator. A low-pass filter smooths the output of the switching in order to give the compensation coefficient.
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申请公布号 |
US4479258(A) |
申请公布日期 |
1984.10.23 |
申请号 |
US19820416112 |
申请日期 |
1982.09.09 |
申请人 |
NIPPON ELECTRIC CO., LTD. |
发明人 |
NAMIKI, JUNJI |
分类号 |
H04B7/00;H04L27/06;(IPC1-7):H04B1/12 |
主分类号 |
H04B7/00 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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