New full-diversity high-rate space-time block codes based on selective power scaling

Author

Das, Sushanta ; Al-Dhahir, Naofal ; Calderbank, Robert ; Chui, Jimmy

Author_Institution

Dept. of Electr. Eng., Univ. of Texas at Dallas, Richardson, TX, USA

fYear

2006

fDate

4-8 Sept. 2006

Firstpage

1

Lastpage

5

Abstract

We design a new rate-5/4 full-diversity orthogonal STBC for QPSK and 2 transmit antennas by enlarging the signalling set from the set of quaternions used in the Alamouti [1] code. Selective power scaling of information symbols is used to guarantee full-diversity while maximizing the coding gain and minimizing the transmitted signal peak-to-minimum power ratio. The optimum power scaling factor is derived using two equivalent criteria and shown to outperform schemes based on only constellation rotation while still enjoying a low-complexity ML decoding algorithm. Extensions to the case of 4 transmit antennas are reported in [4].

Keywords

block codes; maximum likelihood decoding; quadrature phase shift keying; transmitting antennas; Alamouti code; QPSK; coding gain; constellation rotation; full-diversity high-rate space-time block code; information symbol; low-complexity ML decoding algorithm; maximum likelihood decoding algorithm; optimum power scaling factor; orthogonal STBC; peak-to-minimum power ratio; quadrature phase shift keying; quaternion set; selective power scaling; transmit antenna; Abstracts; Matched filters;

fLanguage

English

Publisher

ieee

Conference_Titel

Signal Processing Conference, 2006 14th European

Conference_Location

Florence

ISSN

2219-5491

Type

conf

Filename

7071028