VLSI Implementation of the List Sphere Algorithm

Author

Wenk, M. ; Burg, A. ; Zellweger, M. ; Studer, C. ; Fichtner, W.

Author_Institution

Integrated Syst. Lab., Swiss Fed. Inst. of Technol., Zurich

fYear

2006

fDate

Nov. 2006

Firstpage

107

Lastpage

110

Abstract

Sphere decoding (SD) is widely considered as one of the most promising detection schemes for multiple-input multiple-output (MIMO) communication systems. The recently proposed list sphere-decoding (LSD) algorithm is an extension of the original SD algorithm that improves the error rate performance of wireless communication systems considerably by providing soft-outputs instead of binary decisions. This paper addresses the VLSI implementation of the LSD algorithm. To this end, algorithm optimizations suitable for efficient hardware implementations are developed. The implemented circuits achieve a gain of up to 3 dB in SNR compared to hard output SDs and a throughput of up to 272 Mbps at 20 dB SNR in a 0.25 mum technology for 4times4 MIMO systems with 16-QAM modulation

Keywords

MIMO communication; VLSI; integrated circuit design; wireless channels; 0.25 micron; MIMO systems; QAM modulation; VLSI; binary decisions; detection schemes; list sphere-decoding algorithm; multiple-input multiple-output communication systems; wireless communication systems; Bit error rate; Decoding; Detectors; Error analysis; Hardware; MIMO; Signal processing algorithms; Throughput; Vectors; Very large scale integration;

fLanguage

English

Publisher

ieee

Conference_Titel

Norchip Conference, 2006. 24th

Conference_Location

Linkoping

Print_ISBN

1-4244-0772-9

Type

conf

DOI

10.1109/NORCHP.2006.329255

Filename

4126958