On ASER Analysis of Energy Efficient Modulation Schemes for a Device-to-Device MIMO Relay Network

Abstract

In this paper, we investigate the performance of a device-to-device (D2D) multiple-input and multiple-output (MIMO) communications using an amplify-and-forward relaying for various energy-efficient modulation schemes. For analysis, transmit antenna selection strategy is employed at the transmitter to select the best transmit antenna which maximizes the received signal power. In the analysis, we optimized the relay location to obtain the lowest outage probability possible and derived the generalized upper-bound average symbol error rate expressions of energy-efficient futuristic modulation schemes such as square quadrature amplitude modulation (QAM), rectangular QAM, cross QAM, and hexagonal QAM for D2D network. Further, we have derived the ergodic capacity expression to calculate the achievable rates. Comparative analysis of different QAM schemes for various constellation orders is also presented. Furthermore, the impact of the relative position of relay, path loss, and the number of antennas are also highlighted. Finally, the derived analytical results are verified through Monte-Carlo simulations.

Different QAM schemes analyses for ARS fading channels

“…Notable efforts have been made to work the error performance of various systems employing QAM schemes for different fading channels 19‐35 . In Reference 19, the authors presented error performance for maximal ratio combining (MRC) receiver with cross‐QAM (XQAM) techniques over composite fading channels.…”

“…The same QAM scheme for MIMO TAS/MRC system over Weibull channels was studied in Reference 24. Most recently, the error performance of HQAM, RQAM, or XQAM for different systems has been investigated in References 25‐29. As the authors in Reference 25 examined the ASER performance of HQAM, RQAM, and XQAM for multi‐relay amplify‐and‐forward (AF) cooperative networks over Nakagami‐ m fading channels, the ASER performance of QAM schemes for two‐ray multiple relay systems with imperfect channel state information (CSI) was presented 26 .…”

“…As the authors in Reference 25 examined the ASER performance of HQAM, RQAM, and XQAM for multi‐relay amplify‐and‐forward (AF) cooperative networks over Nakagami‐ m fading channels, the ASER performance of QAM schemes for two‐ray multiple relay systems with imperfect channel state information (CSI) was presented 26 . In Reference 27 ,the ASER analysis of the device‐to‐device MIMO relay system was investigated. While Reference 28 proposed the effect of imperfect CSI for the MIMO TAS/MRC cooperative relay system with HQAM over Nakagami‐ m channels.…”

“…Although the results from References 19‐35 are insightful, these studies fall short in analyzing the QAM schemes for body‐centric communications and in modeling bimodality characteristics in a wireless link. Moreover, as a significant fading model, the alternate Rician shadowed (ARS) fading environments in a system has not been investigated in the aforementioned literature.…”

Energy Efficient Constellation for Wireless Connectivity of IoT Devices

“…In [ 21 ], a symbol-level precoding for multiuser multiple-input single-output (MISO) to minimize the peak transmission energy over symbol time slots in downlink scenario is described. In [ 22 ], performance of a device-to-device (D2D) multiple-input and multiple-output (MIMO) communications using an amplify-and-forward relaying for various energy-efficient modulation schemes is investigated. In [ 23 ], a quadrature space-frequency index modulation (QSF-IM) scheme for 5G system energy-efficiency is proposed, while in [ 24 ] implementation scenarios of spatial modulation (SM) techniques for spectral and energy efficiency of 5G wireless networks are discussed.…”