Joint Resource Allocation for OFDMA based Overlay Cognitive Radio Networks under Stochastic Rate Constraint

TL;DR

This paper develops joint resource allocation algorithms for multi-user OFDM overlay cognitive radio networks, optimizing subcarrier, power, and bit allocations under primary user and power constraints, with validated numerical results.

Contribution

It introduces closed-form expressions and algorithms for joint subcarrier, power, and bit allocation in overlay cognitive radio networks, addressing primary user constraints.

Findings

Optimal and suboptimal algorithms improve resource utilization.

Numerical simulations demonstrate effectiveness of proposed schemes.

Algorithms meet primary user throughput and power constraints.

Abstract

This work presents joint subcarrier, power and bit allocation schemes for multi-user OFDM based overlay cognitive radio under constraints on primary user throughput loss and total secondary user transmitted power. Closed form for expressions for the optimal power and bit allocations are initially derived. Subsequently, optimal and suboptimal algorithms to realise the joint subcarrier, power and bit allocations are introduced. Numerical simulations are used to evaluate the performance of the joint resource allocation algorithms.