Second-Order Optimality of Generalized Spatial Modulation for MIMO Channels With No CSI

Author

Takeuchi, Keigo

Author_Institution

Dept. of Commun. Eng. & Inf., Univ. of Electro-Commun., Tokyo, Japan

Volume

4

Issue

6

fYear

2015

Firstpage

613

Lastpage

616

Abstract

Generalized spatial modulation (GSM) is investigated for Rayleigh block-fading multiple-input multiple-output (MIMO) channels with no channel state information (CSI). Under a condition for coherence time, GSM with quadrature phase-shift keying (QPSK) is proved to achieve a transmission rate that is equal to the capacity of the MIMO channels up to second order in the low signal-to-noise ratio regime, regardless of the number of simultaneously activated transmit antennas and of whether CSI is available at the receiver or not. This implies that QPSK GSM is second-order optimal for the MIMO channels in terms of information-theoretical energy efficiency.

Keywords

MIMO communication; Rayleigh channels; antenna arrays; channel capacity; energy conservation; information theory; quadrature phase shift keying; radio receivers; telecommunication power management; transmitting antennas; CSI; MIMO channel capacity; QPSK; Rayleigh block-fading multiple-input multiple-output channels; channel state information; generalized spatial modulation second-order optimality; information-theoretical energy efficiency; low signal-to-noise ratio regime; quadrature phase-shift keying; receiver; transmit antennas; Fading; GSM; MIMO; Phase shift keying; Signal to noise ratio; Transmitting antennas; Spatial modulation; energy efficiency; information theory; multiple-input multiple output (MIMO) systems; multiple-input multiple-output (MIMO) systems; no channel state information (CSI);

fLanguage

English

Journal_Title

Wireless Communications Letters, IEEE

Publisher

ieee

ISSN

2162-2337

Type

jour

DOI

10.1109/LWC.2015.2475742

Filename

7236875