A comparison of two methods for erasure generation in frequency-hop communications with partial-band interference and Rayleigh fading

Abstract

The erasure of unreliable symbols prior to decoding can significantly improve the performance of frequency-hop communications with Reed-Solomon decoding. Two methods are consideTed in this paper for obtaining side information which can be used to deciare erasures. One method declares erasures based on the number of errors made in demodulating a known sequence of test symbols. The second method, which is a special form of concatenated coding, attaches a parity check symbol to subsets of code symbols and declares erasures when errors are detected by the parity check code. The performance of each of these methods is evaluated for frequency-hop communications over channels with Rayleigh fading, partial-band interference, and thermal noise.

Error and Erasure Decoding Scheme for RS Codes in MFSK based FH/SSMA Communication

“…They are well described in [1][2]. Recent Publications on the performance of coded frequency-hopped spread-spectrum communications consider mainly the RS coding with errors-only decoding, erasure-only decoding and errors and erasures decoding [3][4].…”

An Effect of Erasure Decoding Scheme in FH/SSMA Systems with RS Codes and M-ary FSK Signaling

“…Hence, the combination of block coding and error-erasure decoding can enhance the performance substantially in frequency-hopped multiple-access communication systems if a good method is employed to decide which symbols should be erased [3] [4].…”