Title :
Constructing Coset Codes With Optimal Same-Symbol Weight for Detecting Narrowband Interference in
-FSK Systems
Author :
Versfeld, Daniel J J ; Vinck, A.J.H. ; Ridley, James N. ; Ferreira, Hendrik C.
Author_Institution :
Sch. of Electr. & Inf. Eng., Univ. of the Witwatersrand, Johannesburg, South Africa
Abstract :
Narrowband interference can cause undetected errors when M-FSK data is encoded with an algebraic code containing the all-e codewords. This is due to the fact that the narrowband interferer will cause the output of the M-FSK demodulator to correspond to one of the all- e codewords. One possible solution is to use a coset code of a code containing the repetition code. The choice of the coset leader should be such that the resulting coset code has minimum same-symbol weight. We give a general construction for generating coset codes with minimum same-symbol weight and present results where an optimal coset code for an (n, k) Reed-Solomon code is applied in an M-FSK environment with narrowband interference. From the results it is evident that the optimal coset codes outperform linear codes when narrowband interference is present.
Keywords :
Reed-Solomon codes; algebraic codes; frequency shift keying; M-FSK demodulator; M-FSK systems; Reed-Solomon code; algebraic code; all-e codewords; coset codes; narrowband interference; optimal same-symbol weight; repetition code; Demodulation; Interference; Linear code; Modulation; Narrowband; Reed-Solomon codes; Coset codes; Reed-Solomon codes; minimum same-symbol weight;
Journal_Title :
Information Theory, IEEE Transactions on
DOI :
10.1109/TIT.2010.2079013