2 research outputs found
Spatial Scattering Modulation with Multipath Component Aggregation Based on Antenna Arrays
In this paper, a multipath component aggregation (MCA) mechanism is
introduced for spatial scattering modulation (SSM) to overcome the limitation
in conventional SSM that the transmit antenna array steers the beam to a single
multipath (MP) component at each instance. In the proposed MCA-SSM system,
information bits are divided into two streams. One is mapped to an
amplitude-phase-modulation (APM) constellation symbol, and the other is mapped
to a beam vector symbol which steers multiple beams to selected strongest MP
components via an MCA matrix. In comparison with the conventional SSM system,
the proposed MCA-SSM enhances the bit error performance by avoiding both low
receiving power due to steering the beam to a single weak MP component and
inter-MP interference due to MP components with close values of angle of
arrival (AoA) or angle of departure (AoD). For the proposed MCA-SSM, a union
upper bound (UUB) on the average bit error probability (ABEP) with any MCA
matrix is analytically derived and validated via Monte Carlo simulations. Based
on the UUB, the MCA matrix is analytically optimized to minimize the ABEP of
the MCA-SSM. Finally, numerical experiments are carried out, which show that
the proposed MCA-SSM system remarkably outperforms the state-of-the-art SSM
system in terms of ABEP under a typical indoor environment