Reception of OFDM Signals with Convolutional Coding in Channels with Dispersion and Fast Fading

Abstract

The paper discusses the problem of coherent reception of signals with orthogonal frequency multiplexing (OFDM) in a channel with memory using convolutional coding. For a comparative analysis of the effectiveness of the reception “a whole” with element-wise decision (RWED) with a convolutional code, two different channels are modeled in the OFDM system – a channel with constant parameters and a fast fading channel. The analysis is carried out with different modulations - QPSK modulation and QAM modulation. The use of the algorithm of RWED makes it possible to abandon the use of prefixes and postfixes in the structure of the OFDM symbol, which leads to an increase in throughput.