Extended Receive Antenna Shift Keying

Abstract

Abstract-The new spatial modulation schemes that appeared in the early twenty-first century allow for a new exploitation of the space to an increase in the spectral efficiency of MIMO systems. These new schemes commonly referred to as spatial modulations use the index of the transmit (resp. the receive) antenna to transmit additional data. We concentrate our study on the spatial modulations at the receiver side named Receive Antenna Shift Keying (RASK) where the new or additional data is provided by the index of the antenna towards which the transmit antennas concentrate the signal energy. A classical RASK scheme with Nr receive antennas allows for the transmission of log 2 Nr additional bits per symbol duration. We propose a novel scheme Extended RASK where the amount of additional bits is equal to Nr. The theoretical performance of the proposed ERASK scheme is validated through simulations and compared to the performance of RASK.

Performance analysis of the maximum ratio transmission preprocessing for extended receive antenna shift keying

“…A generalization of the RSM principle, further referred to as GPSM (Generalised Pre-coding aided Spatial Modulation), is proposed in [7] where the transmit antennas concentrate the signal energy towards a fixed and constant number of receive antennas to increase the spectral efficiency. In [8], an extended model of RASK is also presented, referred to as ERASK, where all combinations of different numbers of targeted antennas are used. The ZF preprocessing was employed, supposing a perfect channel estimation at the transmitter side.…”

“…In this paper, the ERASK scheme with MRT preprocessing is evaluated. The equation of the received signal was derived to find the analytical performance using the same detection algorithm used in [8]. The ZF-ERASK is demonstrated to outperform the MRT-ERASK but at the expense of a higher complexity making MRT-ERASK more suitable for systems with high number of transmit antennas.…”

Extended Receive Spatial Modulation MIMO Scheme for Higher Spectral Efficiency

“…This leads to a SE of log 2 (N r ) [9]. Such SE can be increased up to N r by the use of the Extended RASK (ERASK) scheme which allows 0 ≤ N a ≤ N r antennas to be simultaneously targeted [12]. At the transmitter side, a group of β s = N r bits is mapped onto a spatial symbol X ∈ N N R ×1 which is written as:…”

“…Opposed to conventional SM where a subset of RF chains is deployed, here all TAs and RAs are active. Finally, an extended model of RASK is introduced in [12], referred to as ERASK, where all possible combinations of targeted RAs are used, even that one where zero RA is targeted, i.e. no signal is emitted.…”

Hardware designs and analysis for variant receive space modulation techniques

“…Transmit preprocessing in RSM aiming to reduce complexity at the transmitter while minimizing bit error rate (BER) performance are explored in other works. 13,[16][17][18] The impact of imperfect channel knowledge at the transmitter and the receiver in RSM is studied in the work of Stavridis et al 19 Other schemes focus on extending the spectral efficiency of RSM from log 2 (N r ) to N r as in the works of Mokh et al [20][21][22] Yet, such an enhancement in spectral efficiency is attained at the cost of calibration to determine the threshold voltage at each receive antenna. Besides, each receive antenna must be connected to an RF chain to decode a modulated signal.This paper contributes to existing theories by proposing receiver designs for the variant RSMTs including receive space shift keying (RSSK), 13,19 RSM,13,19 receive quadrature SSK (RQSSK), 23 and receive quadrature SM (RQSM).…”