Energy Efficient Power Allocation for OFDM-Based Cognitive Radio Systems with Partial Intersystem CSI | Zendy

Yunli Chen | Zendy; Zhengguang Zheng | Zendy; Yibin Hou | Zendy; Yong Li | Zendy; Shan Jin | Zendy

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Energy Efficient Power Allocation for OFDM-Based Cognitive Radio Systems with Partial Intersystem CSI

Author(s) -

Yunli Chen,

Zhengguang Zheng,

Yibin Hou,

Yong Li,

Shan Jin

Publication year - 2014

Publication title -

mathematical problems in engineering

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.262

H-Index - 62

eISSN - 1026-7077

pISSN - 1024-123X

DOI - 10.1155/2014/781528

Subject(s) - cognitive radio , orthogonal frequency division multiplexing , intersystem crossing , channel state information , interference (communication) , computer science , efficient energy use , energy (signal processing) , channel (broadcasting) , power (physics) , mathematical optimization , electronic engineering , algorithm , telecommunications , wireless , mathematics , engineering , electrical engineering , statistics , quantum mechanics , nuclear physics , singlet state , excited state , physics

This paper investigates energy efficient power allocation for orthogonal frequency division multiplexing- (OFDM-) based cognitive radio (CR) systems with partial intersystem channel state information (CSI) available. The goal is to maximize energy efficiency (EE) while ensuring the minimum rate of secondary user (SU) and keeping the average interference power (AIP) introduced to primary user (PU) within a target probability level. We propose a suboptimal algorithm to solve this optimization problem based on classic water-filling (WF) technique. Moreover, we first address the relation between EE and water level. In order to reduce complexity, a simplified algorithm with closed-form solution is also proposed. Numerical results are provided to corroborate our theoretical analysis and to demonstrate the effectiveness of the proposed schemes.

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