Power Control for Space–Time-Coded MIMO Systems With Imperfect Feedback Over Joint Transmit–Receive-Correlated Channel

Abstract

In this paper, power adaptation strategies for minimizing bit error rate (BER) subject to an average power constraint for orthogonal space-time coded multiple-input multipleoutput (MIMO) systems with mean and covariance feedback over joint transmit-receive correlated channels are presented. We first develop an optimal spatial-only power control (PC) based on an approximated BER bound, which can include the mean feedback only and covariance feedback only as special cases. Using a newly defined fuzzy signal-to-noise ratio (FSNR) criterion, a suboptimal spatial PC scheme with a closed-form expression is derived. This FSNR-based power adaptation not only has the computational complexity less than but also obtain the BER performance close to that of the optimal spatial-only PC scheme. Second, the degrees of freedom in temporal and spatial domains are exploited to derive a joint spatio-temporal PC with the use of FSNR strategy to minimize the average BER subject to a long term average power constraint with mean and covariance feedback. Simulation results show that the proposed two spatial-only PC schemes can provide BER lower than that of the equal power allocation, and obtain almost the same performance as the existing spatial-only optimal scheme but have lower computational complexity. Moreover, they outperform the PC schemes with mean or covariance feedback only. Most importantly, the new joint spatio-temporal PC scheme substantially outperforms all the spatial-only PC schemes.

Beamforming and Transmit Power Design for Intelligent Reconfigurable Surface-aided Secure Spatial Modulation

“…proposed in [2] whose main idea was to carry additive bit information via antenna indices [3]. Different from the two typical forms of MIMO, Bell Laboratories Layer Space-Time (BLAST) [4] and space time coding (STC) [5], SM may strike a good balance between spatial multiplexing and diversity and is called the third way between BLAST and STC. Compared to BLAST and STC, SM becomes more attractive due to its advantages of no inter-channel interference (ICI) , interantenna synchronization (IAS) [6] and the use of less active radio frequency (RF) chains.…”

Precoding and Transmit Antenna Subarray Selection for Secure Hybrid Spatial Modulation

“…As an essential key technique for future generation wireless communications like 6G and WiFi 7, multiple-input-multipleoutput (MIMO) has obtained a continuous extensive and intensive huge amount of research activities from the end of the last century, which can greatly improve the system performance in wireless communications. Two typical forms of MIMO are bell laboratories layer space-time (BLAST) in [1] and space time coding (STC) in [2]. They make their effort to strike a good balance between spatial multiplexing and diversities in MIMO systems.…”

High-Performance Power Allocation Strategies for Secure Spatial Modulation

“…In multiple-input-multiple-output (MIMO) systems, spatial modulation (SM) [1] was proposed as the third method to strike a good balance between spatial multiplexing and diversities while Bell Laboratories Layer Space-Time (BLAST) in [2] and space time coding (STC) in [3] were the first two ways. Unlike BLAST and STC, SM exploits both indices of activated antenna and modulation symbols to transmit information, which can increase the spectral efficiency and reduce the complexity and cost of multiple-antenna schemes without deteriorating the end-to-end system performance and still guaranteeing good data rates [4].…”