Approaches for specifying RF ASICs on which mobile systems are built.Nonlinearity effect analyses involving intermodulation, interferer blocking, spectrum regrowth and modulation.Frequency planning, system link budgeting, and performance evaluation of transmitters and receivers.Coverage of superheterodyne, direct-conversion, low-IF, and band-pass sampling radio architectures.Fundamental information on communications, signal and system theories.The book is filled with detailed wireless systems design information, and addresses specifications that are critical for the design process. Its focus on mobile station transmitter and receiver system design also applies to transceiver design of other wireless systems such as WLAN. The author develops systematic methods for RF systems design, complete with a comprehensive set of design formulas. RF System Design of Transceivers for Wireless Communications is for RF Engineers and, in particular, those engineers focusing mostly on RF systems and RFIC design. Presents a global, systematic approach to the joint design of the analog front-end compensation, channel estimation, synchronization and of the digital baseband algorithms Describes in depth the main front-end non-idealities such as phase noise, IQ imbalance, non-linearity, clipping, quantization, carrier frequency offset, sampling clock offset and their impact on the modulation Explains how the non-idealities introduced by the analog front-end elements can be compensated digitally Methodologies are applied to the emerging Wireless Local Area Network and outdoor Cellular communication systems, hence covering OFDM(A), SC-FDE and MIMO Written by authors with in-depth expertise developed in the wireless research group of IMEC and projects covering the main broadband wireless standards. It will also be of interest to researchers in industry and academia, graduate students and wireless network operators. This book is a valuable reference for wireless system architects and chip designers as well as engineers or managers in system design and development. 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.