Spatial Modulation Scheme With Two Activated Transmit Antennas

Spatial Modulation (SM) is a candidate modulation scheme for beyond 5G communications systems due to its reduced hardware complexity and good trade-off between energy and spectral efficiency. This paper proposes two Machine Learning based solutions for easing the implementation of adaptive SM systems. On the one hand, a shallow neural network is shown to be an accurate and simple method for obtaining the capacity of SM. On the other hand, a deep neural network is proposed to select the coding rate in practical adaptive SM systems.

Download Full-text

A Novel Spatial Modulation Scheme for MIMO System

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.198-199.1573 ◽

2012 ◽

Vol 198-199 ◽

pp. 1573-1577 ◽

Cited By ~ 1

Author(s):

Yao Yuan Zhang ◽

Zi Sheng Zhang ◽

Ya Fei Lian ◽

Qian Ding

Keyword(s):

Rayleigh Fading ◽

Mimo System ◽

Spectrum Efficiency ◽

Spatial Modulation ◽

Modulation Scheme ◽

Channel Correlation ◽

Optimal Detector ◽

Shift Keying ◽

Correlated Channel ◽

Symbol Duration

A novel spatial modulation scheme based on Space-Shift Keying (SSK) modulation is introduced for MIMO system. The proposed scheme doubles the spectrum efficiency of SSK by assigning unique symbols to different combinations of antenna indexes per symbol duration, while retaining the SSK’s inherent advantages. The optimal detector is utilized at the receiver simultaneously. Analytical and simulation results show: 1) in Rayleigh fading channel scenario，the obtained gains in SNR for the same spectral efficiency of the proposed scheme over amplitude/phase modulation (APM), vertical Bell Labs layered structure (V-BLAST) and spatial modulation (SM) systems are obvious; 2) under the correlated channel assumption, the new one still outperforms SM and V-BLAST clearly, which indicates the new one is more robust in the presence of channel correlation.

Download Full-text

Two-Source Asymmetric Turbo-Coded Cooperative Spatial Modulation Scheme with Code Matched Interleaver

Electronics ◽

10.3390/electronics9010169 ◽

2020 ◽

Vol 9 (1) ◽

pp. 169

Author(s):

Chunli Zhao ◽

Fengfan Yang ◽

Rahim Umar ◽

Shoaib Mughal

Keyword(s):

Cooperative Communication ◽

Vital Role ◽

Wireless Channel ◽

Spatial Modulation ◽

Modulation Scheme ◽

Destination Node ◽

Turbo Decoding ◽

Cooperative Scheme ◽

First Time ◽

Ber Performance

This paper proposes, for the first time, a two-source asymmetric turbo-coded-cooperative spatial modulation (SM) scheme over the slow Rayleigh fading channel. As in any coded cooperative communication, the interleaver plays a vital role in mitigating the harsh effect of the wireless channel. Therefore, the code matched interleaver (CMI) is effectively used in the proposed design. The simulated results reveal that the bit error rate (BER) performance of the proposed coded cooperative communication system outperforms the asymmetric turbo-coded non-cooperative scheme under identical conditions. This prominent performance improvement has been made possible due to the joint asymmetric turbo decoding at the destination node. Furthermore, to check the effectiveness of the proposed scheme, we have also developed a two-source asymmetric turbo-coded cooperative scheme based on the vertical bell labs layered space-time (VBLAST), incorporating the CMI as the suitable benchmark. It is observed that the proposed scheme employing SM has a better BER performance than the VBLAST scheme under identical conditions.

Download Full-text