Method and apparatus for compensating for IQ mismatch in radio frequency receivers

摘要

A receiver including a physical layer module, a function module, a residual module, an IQ mismatch module, and a compensation module. The physical layer module is configured to (i) receive a signal, and (ii) downconvert the signal to generate a downconverted signal, wherein the downconverted signal has IQ mismatch. The function module is configured to determine (i) a first value based on a first function and a resultant signal, and (ii) a second value based on a second function. The residual module is configured to estimate a residual IQ mismatch based on the first value and the second value. The IQ mismatch module is configured to estimate an IQ mismatch coefficient based on the estimate of the residual IQ mismatch. The compensation module is configured to compensate for the IQ mismatch of the downconverted signal including generating the resultant signal based on the estimate of the IQ mismatch.

主权项

1. A receiver comprising:
a physical layer module configured to (i) receive a signal, and (ii) downconvert the signal to generate a downconverted signal, wherein the downconverted signal has in-phase and quadrature phase (IQ) mismatch; a function module configured to determine (i) a first value based on a first function and a resultant signal, and (ii) a second value based on a second function; a residual module configured to estimate a residual IQ mismatch based on the first value and the second value; an IQ mismatch module configured to estimate an IQ mismatch coefficient based on the estimate of the residual IQ mismatch; and a compensation module configured to compensate for the IQ mismatch of the downconverted signal including generating the resultant signal based on the estimate of the IQ mismatch.