Circuit Design for Wireless Communications: Improved Techniques
for Image Rejection in Wideband Quadrature Receivers is the first
book focusing on the subject of image rejection in wireless
receiver design, which has never been so important as high level of
integration is highly demanded in the current and next generation
mobile terminals.
In this book, the image rejection problems in various receiver
architectures which are suitable for high level of integration,
including image-reject, direct conversion and low IF architectures,
are studied. The fundamental source of the limitation of the image
rejection in these receivers is the imbalance between their
in-phase (I) and quadrature (Q) channels, which becomes more
problematic when the receivers are of wideband. Besides traditional
methods, this book provides novel solutions to the problem, which
falls into two broad types. The first type refers to new circuits
that produce less I/Q imbalance. This includes high performance
switched-capacitor Hilbert transformers and precise quadrature
sampling circuits. The second type is to compensate the I/Q
imbalance, which is possibly frequency-dependent, in digital domain
by calibration or signal processing techniques. Design examples
have been included.
Circuit Design for Wireless Communications: Improved Techniques
for Image Rejection in Wideband Quadrature Receivers serves as a
very useful reference for wireless design engineers who want to
improve the image rejection of their wireless receivers and
researchers and students who are interested in this subject.
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