Optimum receiver design for OFDM-based broadband transmission .II. A case study

Abstract

Abstract-This paper details on the design of OFDM receivers. Special attention is paid to the OFDM-specific receiver functions necessary to demodulate the received signal and deliver soft information to the outer receiver for decoding. In Part I of the paper, the effects of nonideal transmission conditions have been thoroughly analyzed. To show the impact of the synchronization algorithms-which are most critical in OFDM-on system performance and complexity we consider the design of a complete receiver consisting of symbol synchronization, carrier/sampling clock synchronization and channel estimation. The performance of the algorithms is analyzed and a qualitative estimate of the resulting complexity is given. This allows to draw conclusions concerning the achievable system performance under realistic complexity assumptions.

Low Complexity OFDM Detector for Underwater Acoustic Channels

“…[1]). When Doppler distortion is caused by motion, such an assumption is justified only in narrowband systems, where the signal bandwidth B is much smaller than the center frequency.…”

Asynchronous multicarrier multiple access: Optimal and sub-optimal detection and decoding

“…A technique for compensating time and frequency misalignments based on feedback control in a DMT-MA system is presented in [45]. On the other hand, a rich body of literature can be found on the study of receivers for DMT modulation in single-user applications in the presence of timing errors, frequency offsets, and multipath fading, e.g., [30,31] and associated references. An overview of equalization methods for DMT transceivers is presented in [28].…”

Energy efficient error-correcting coding for wireless systems

“…Generally it is a two-dimensional interpolation problem but it can be separated into a one-dimensional interpolation in time and in frequency for a low-complexity system implementation [76]. There are several types of interpolation algorithms, e.g.…”