The book concludes with two chapters providing an in-depth coverage of the estimation and compensation algorithms. Chapter three then uses this information to explore what happens when the topics introduced in the first two chapters are merged. The first chapter is a comprehensive introduction to the emerging wireless standards which is followed by a detailed description of the front-end non-idealities in chapter two. The book is organized to allow the reader to gradually absorb the important information and vast quantity of material on this subject. In particular, system strategies for joint estimation of synchronization and front-end non-ideality parameters are emphasized. It covers in detail the digital compensation of many non-idealities, for a wide class of emerging broadband standards and with a system approach in the design of the receiver algorithms. 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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