Fully integrated self-tuned image rejection downconversion system
作者： Yuanjin Zheng
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摘要: A feedback image rejection downconversion system is described, which can be used in low IF receivers with good performance and completely integrated. In the forward path of system, quadrature mixers complex filters are for frequency separation RF signal from signal. path, a correlator, gain mismatch estimator two VGAs have been to detect, estimate compensate amplitude phase between I Q signals. The whole self-tuned operate both closed open loop mode. very high robust ratio (over 60 dB) has achieved.
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