  Millimeter-wave and Terahertz frequencies, while promising high throughput
and abundant spectrum, are highly susceptible to hardware non-idealities like
phase-noise, which degrade the system performance and make transceiver
implementation difficult. While several phase-noise compensation techniques
have been proposed, there are limited results on the post-compensation system
performance. Consequently, in this paper, a generalized reference-signal (RS)
aided low-complexity phase-noise compensation technique is proposed for
high-frequency, multi-carrier systems. The technique generalizes several
existing solutions and involves an RS that is transmitted in each symbol,
occupies adjacent sub-carriers, and is separated from the data by null
sub-carriers. A detailed theoretical analysis of the post-phase-noise
compensation performance is presented for an analog beamforming receiver under
an arbitrary phase-noise model. Using this analysis, the performance-impact of
several system parameters is examined and the throughput-optimal designs for
the RS sequence, RS bandwidth, power allocation, number of null sub-carriers,
and the number of estimated phase-noise spectral components are also derived.
Simulations performed under 3GPP compliant settings suggest that the proposed
scheme is robust to phase-noise modeling errors and can, with the optimized
parameters, achieve better performance than several existing solutions.
