Efficient implementation of sphere demodulation

We provide new results on the sphere demodulator (SD) and its new variant, the list sphere demodulator (LSD). A new reduced complexity SD algorithm is presented. We suggest implementing the necessary sorting of constellation symbols through a look up table. In addition, we propose the use of a modif...

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Bibliographic Details
Published in2003 IEEE 4th Workshop on Signal Processing Advances in Wireless Communications pp. 36 - 40
Main Authors Wiesel, A., Mestre, X., Pages, A., Fonollosa, J.R.
Format Conference Proceeding
LanguageEnglish
Published IEEE 2003
Subjects
Additive noise
Ambient intelligence
Communication systems
Demodulation
Fading
Frequency
Maximum likelihood estimation
Modems
Sorting
Vectors
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ISBN9780780378582
078037858X
DOI10.1109/SPAWC.2003.1318917

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Summary:We provide new results on the sphere demodulator (SD) and its new variant, the list sphere demodulator (LSD). A new reduced complexity SD algorithm is presented. We suggest implementing the necessary sorting of constellation symbols through a look up table. In addition, we propose the use of a modified QR algorithm which tries to begin the search in the layers which are "easier to demodulate". These improvements also apply to the recently published soft output LSD, in which we implement the list using the heap structure.
ISBN:9780780378582
078037858X
DOI:10.1109/SPAWC.2003.1318917