Release Time:2019-03-12  Hits:

Indexed by: Journal Article

Date of Publication: 2017-01-26

Journal: IET COMMUNICATIONS

Included Journals: Scopus、EI、SCIE

Volume: 11

Issue: 2

Page Number: 249-257

ISSN: 1751-8628

Key Words: space-time block codes; phase shift keying; phase coding; orthogonal codes; trellis coded modulation; spectral efficiency; super-orthogonal space-time trellis code; STBC-SM; M-ary phase shift keying; space-time block coded spatial modulation; modified codeword design

Abstract: Two kinds of modified codewords for space-time block coded spatial modulation (STBC-SM) are presented in this study. The first modified codeword introduces a concept of flexible coefficients into the M-ary phase shift keying STBC-SM. A method is proposed to obtain the optimal flexible coefficients. Moreover, the first modified codewords can also be applied to the systems developed from the STBC-SM. In the second provided codewords, super-orthogonal space-time trellis codes are applied in STBC-SM. Therefore, a higher spectral efficiency is obtained compared with the original STBC-SM. Finally, the simulation results and theoretical analysis demonstrate these performance advantages of the two kinds of modified codewords for STBC-SM.