Abstract:
Mitigating channel fading and transceiver impairments
are desirable for high-speed terahertz (THz) wireless
links. This paper analyzes the performance of a multi-antenna
THz wireless system by considering the combined effect of
pointing errors and fluctuating two-ray (FTR) fading model.
We provide a statistical characterization of the maximal ratio
combining (MRC) receiver over independent and nonidentical
(i.ni.d.) channel conditions in terms of multi-variate Fox’s H
by deriving density and distribution functions of the signal-tonoise
ratio (SNR) of a single-link THz link using incomplete
Gamma function. We develop exact analytical expressions of
outage probability, average bit-error-rate (BER), and ergodic
capacity for both single-antenna and MRC receivers. We also
present the diversity order of the system by deriving asymptotic
expressions for outage probability and average BER at high SNR
to obtain insights into the system performance. We validate our
derived analytical expressions with Monte-Carlo simulations and
demonstrate the effect of various system and channel parameters
on the performance of single and multi-antenna THz wireless
communications.