![]() Digital Compensation for Analog Front-Ends provides a systematic approach to designing a digital communication system. It enables the wireless systems and chip designers to more effectively trade the communication performance with the production cost. Consequently the joint design of the analog front-end and of the digital baseband algorithms has become an important field of research. ![]() The desire to build lower cost analog front-ends has triggered interest in a new domain of research. It is shown, that the compensation of the quasi-linear impairments is sufficient and complex deconvolutive IQ-regeneration procedures are not stringently required to obtain sufficient signal qualities. With the consideration of practical variations of amplitude and phase impairments, the influence of only the frequency-dependent portions of the impairments is investigated. The analysis is valid for both, direct conversion and intermediate frequency (IF) reception. A closed representation of arbitrary signals being processed by an arbitrary imbalanced analog front-end is provided. In this article, the frequency-selective imbalance of the in-phase and quadrature-phase signals is addressed. On the other hand, more digital signal processing is required to compensate for the spurious effects of the front-end. On the one hand, the analog front-ends become less complex. ![]() Within current implementations of mobile terminals, more and more analog components are replaced by appropriate digital processing. ![]()
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