发明名称 |
Leakage signal cancellation apparatus |
摘要 |
A quadrature modulator divides a part of a transmitted signal to generate a cancel signal. A signal comparator compares the amplitude and phase of the cancel signal which is generated by the quadrature modulator with those of a received signal, and outputs signals corresponding to the comparison results to the quadrature modulator. The quadrature modulator generates the cancel signal on the basis of the output signals of the signal comparator, and these components perform feedback control such that the cancel signal has the same amplitude as the leakage signal and is in phase with the leakage signal. A combiner combines the cancel signal with an antiphase cancel signal, which is made to be in opposite phase with the cancel signal outputted from the quadrature modulator, to cancel out the leakage signal.
|
申请公布号 |
US7899142(B2) |
申请公布日期 |
2011.03.01 |
申请号 |
US20060065808 |
申请日期 |
2006.07.28 |
申请人 |
MITSUBISHI ELECTRIC CORPORATION |
发明人 |
HAYASHI RYOJI;TAKAYAMA NAOHISA;SHIMOZAWA MITSUHIRO |
分类号 |
H03D1/04;H03D1/06;H03K5/01;H03K6/04;H04B1/10;H04L1/00;H04L25/08 |
主分类号 |
H03D1/04 |
代理机构 |
|
代理人 |
|
主权项 |
|
地址 |
|