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High Performance Viterbi Decoder for OFDM Systems

Summary: High Performance Viterbi Decoder for
OFDM Systems
Enis Akay and Ender Ayanoglu
Center for Pervasive Communications and Computing
Department of Electrical Engineering and Computer Science
The Henry Samueli School of Engineering
University of California, Irvine
Irvine, California 92697-2625
Email: eakay@uci.edu ayanoglu@uci.edu
Abstract-- It is well-known that, for systems that deploy
conventional convolutional codes, a Viterbi decoder is the best
solution in maximum likelihood sense to decode an information
sequence. Typically, a Viterbi decoder uses Euclidean or Ham-
ming distance as a metric. The use of a conventional metric
leads to a high performance for systems that are employed for
frequency nonselective channels (e.g., additive white Gaussian
noise (AWGN), or Rayleigh fading). However, if the system is
based on orthogonal frequency division multiplexing (OFDM)
and the channel has frequency selective multipath fading, then
the performance can be further improved. In this paper we


Source: Ayanoglu, Ender - Department of Electrical and Computer Engineering, University of California, Irvine


Collections: Engineering