Daniel J. J. Versfeld

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Reliability information derived from the channel output in the form of a Log Likelihood Ratio or a Distance Metric (DM) have been proposed in literature for M-ary Quadrature Amplitude Modulation systems. Reliable soft information from the channel output improves the performance of the forward error correction decoding algorithm. This paper proposes an(More)
Narrowband interference can cause undetected errors when M-FSK data is encoded with an algebraic code containing the all-<i>e</i> 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- <i>e</i> codewords. One possible solution is to use a coset code of a code(More)
We derive a simple formula to generate a wide-sense systematic generator matrix <i>B</i> for a Reed-Solomon code. Specifically, we generate the generator matrix <i>B</i> such that the columns with indices ¿<sub>1</sub>, ¿<sub>2</sub>,..., ¿<i>k</i> are the columns of the identity matrix <i>Ik</i>. One possible application of these wide-sense matrices is(More)
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