A New Approach for Fast Generalized Complex Sphere Decoding Algorithm in MIMO Systems

Author

Liu, Chao

Author_Institution

Sch. of Commun. Eng., Hangzhou Dianzi Univ., Hangzhou

fYear

2007

fDate

21-25 Sept. 2007

Firstpage

342

Lastpage

345

Abstract

A fast generalized complex sphere decoder (GCSD) is proposed in this paper. This GCSD can be used to solve the under-determined MIMO systems. Moreover, it can handle not only the QAM and PSK constellations, but also the arbitrary complex constellations. The basic idea is to partition the transmitted signal vector into two sub-vectors. After some transformations, we can use a search scheme which is similar to sphere decoding and a conventional complex sphere decoder to solve these two sub-vectors respectively. Simulation results show that the complexity of our GSCD is significantly lower than the exhaustive search scheme on the under-determined part of the transmitted signal vectors.

Keywords

MIMO communication; decoding; phase shift keying; quadrature amplitude modulation; MIMO Systems; PSK constellations; QAM constellations; arbitrary complex constellations; exhaustive search scheme; fast generalized complex sphere decoding algorithm; sub-vectors; transmitted signal vector; Constellation diagram; Lattices; MIMO; Maximum likelihood decoding; Maximum likelihood detection; Maximum likelihood estimation; Phase shift keying; Quadrature amplitude modulation; Receiving antennas; Wireless communication;

fLanguage

English

Publisher

ieee

Conference_Titel

Wireless Communications, Networking and Mobile Computing, 2007. WiCom 2007. International Conference on

Conference_Location

Shanghai

Print_ISBN

978-1-4244-1311-9

Type

conf

DOI

10.1109/WICOM.2007.92

Filename

4339867