Polarized Spatial Scattering Modulation

Abstract

In this letter, a novel polarized spatial scattering modulation (PSSM), which exploits the available degree of freedom in the polarization domain in addition to the spatial scattering and signal domains to increase the spectral efficiency, is proposed. At the receiver, the maximum likelihood algorithm is applied to detect received signals. A tight union upper bound on the average bit error probability (ABEP) is derived in a closedform. For the sake of fast system evaluation and comparison, an asymptotic bound on the ABEP is derived. Numerical results show that the proposed PSSM outperforms the conventional spatial scattering modulation and maximum beamforming systems in terms of the ABEP.

Performance Evaluation of Spatial Scattering Modulation in the Indoor Environment

“…To transmit the first stream, Tx generates a pencil beam steering to a selected MP component. In this process, channel state information (CSI) is assumed to be known at the transmitter following the setup of typical SSM systems [3]- [6], [8]. If R mp bits are transmitted in this stream, the Tx array select one MP component out of N s =2 Rmp candidate MP components with N s ≤ N ts .…”

“…Denote the output signal of RF chains as z. Then, the output signal of the k ′ -th RF chain, z(k ′ ), is computed by combining ( 9) and (8).…”

“…• All elements in the Tx and Rx arrays are assumed to be omnidirectional and vertically polarized. • CSI is assumed to be known at the transmitter as in typical SSM systems [3]- [8]. It is worth noting that breaking each of the above assumptions deserves a comprehensive study.…”

“…Massive multiple-input-multiple-output (MIMO) technologies have been widely employed in wireless communication systems [1]. As a strong candidate for B5G modulation systems with massive MIMO antenna arrays at both the transmitter and the receiver, spatial scattering modulation (SSM) has been proposed and widely investigated to minimize power consumption as it requires only one radio frequency (RF)chain at the transmitter [2]- [8]. In the SSM system, the information bits are separated into two streams.…”

“…In most existing works, channel gains of MP components are assumed to be independent and identically distributed (i.i.d.) complex Gaussian variables [2]- [8]. However, This research was a part of KTP project -"Massive MIMO Beamforming for 5G", which is funded by UKRI through Innovate UK.…”