Introduction to OFDM Receiver Design and Simulation

This practical book is an accessible introduction to Orthogonal frequencydivision multiplexing (OFDM) receiver design, a technology that allows digitized data to be carried by multiple carriers. It offers a detailed simulation study of an OFDM algorithm for Wi-Fi and 4G cellular that can be used to understand other OFDM waveforms. Extensive simulation studies are included using the transmission waveform given by the IEEE 802.11 standard; Scrambler, error-correcting codes, interleaver and radio-wave propagation model are included; OFDM waveform characteristics, signal acquisition, synchronization issues, channel estimation and tracking, hard and soft decision decoding are all covered; Detailed derivations leading to the final formula for any algorithm are given, which allows the reader to clearly understand the approximations and conditions behind the formulas and apply them appropriately; The algorithms are selected not just for the best performance from simulation study but also for easy implementation. An example is a unique algorithm for signal acquisition using the principle of maximum likelihood detection. This practical book is an accessible introduction to Orthogonal frequency-division multiplexing (OFDM) receiver design, a technology that allows digitized data to be carried by multiple carriers. It offers a detailed simulation study of an OFDM algorithm for Wi-Fi and 4G cellular that can be used to understand other OFDM waveforms. Wi-Fi digital communications are based on several IEEE 802.11 standards. Extensive simulation studies are included using the transmission waveform given by the IEEE 802.11a standard. Shift register sequence for the scrambler, block codes, cyclic codes and convolutional codes are presented. Punctured convolutional codes for error corrections, large scale and small-scale propagation model are also included. Detailed derivations leading to the final formula for any algorithm are given, which allows the reader to clearly understand the approximations and conditions behind the formulas and apply them appropriately. Dedication Contents Preface 1 Discrete Time Signals and Discrete Fourier Transform 2 Single-Carrier Modulation 3 Multicarrier Modulation 4 OFDM Transmission 5 Shift Register Sequence and Data Scrambler 6 Radio-Wave Propagation Model 7 Error-Correcting Codes and Interleaver 8 Signal Acquisition 9 Synchronization 10 Channel Estimation and Tracking 11 Data Decoding 12 Simulation Study of a Multipath Channel on OFDM About the Author Index