Error Performance of Wireless Powered Cognitive Relay Networks with Interference Alignment
Sultangali Arzykulov, Galymzhan Nauryzbayev, Theodoros A. Tsiftsis,, Mohamed Abdallah
TL;DR
This paper analyzes the error performance of a wireless powered cognitive relay network employing interference alignment, focusing on energy harvesting, beamforming design, and BER under perfect and imperfect CSI conditions.
Contribution
It introduces a novel analysis of BER performance in a cognitive relay system with interference alignment and energy harvesting, considering CSI imperfections.
Findings
BER performance improves with accurate CSI
CSI mismatch significantly degrades system performance
Beamforming design is crucial for optimizing error rates
Abstract
This paper studies a two-hop decode-and-forward underlay cognitive radio system with interference alignment technique. An energy-constrained relay node harvests the energy from the interference signals through a power-splitting (PS) relaying protocol. Firstly, the beamforming matrices design for the primary and secondary networks is demonstrated. Then, a bit error rate (BER) performance of the system under perfect and imperfect channel state information (CSI) scenarios for PS protocol is calculated. Finally, the impact of the CSI mismatch parameters on the BER performance is simulated.
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