GSM Channel Equalization Algorithm - Modern DSP Coprocessor Approach
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The paper presents basic equations of efficient GSM Viterbi equalizer algorithm based on approximation of GMSK modulation by linear superposition of amplitude modulated pulses. This approximation allows to use Ungerboeck form of channel equalizer with significantly reduced arithmetic complexity. Proposed algorithm can be effectively implemented on the Viterbi and Filter coprocessors of new Motorola DSP56305 digital signal processor. Short overview of coprocessor features related to the proposed algorithm is included.
KeywordsGSM channel equalization, GMSK modulation, derotation technique, DSP coprocessors, Viterbi algorithm
Document typePeer reviewed
Document versionFinal PDF
SourceRadioengineering. 1999, vol. 8, č. 4, s. 26-31. ISSN 1210-2512
- 1999/4