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Efficient Power Allocation for Multiuser Cognitive Radio Networks

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Abstract

Cognitive radio has been recently considered as a flexible spectrum usage model to improve the spectrum efficiency. In this paper, we develop a new power allocation approach by geometric programming (GP) to realize the coexistence of a primary user (PU) and multiple cognitive users (CUs) in the same frequency band. The objective is to minimize the total power consumption of CUs while guaranteeing the not only protection of PU but also the quality of service (QoS) of multiple CUs, which is different from previous works. In order to facilitate the centralized computation, a distributed algorithm is developed to adaptively adjust the transmit power of each CU. Numerical results are provided to show the effectiveness of the proposed algorithm in power saving.

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Authors and Affiliations

  1. Faculty of Information Technology, Macau University of Science and Technology, Avenida Wai Long, Taipa, Macau, China

    Dong Li

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  1. Dong Li
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Correspondence to Dong Li.

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Li, D. Efficient Power Allocation for Multiuser Cognitive Radio Networks. Wireless Pers Commun 59, 589–597 (2011). https://doi.org/10.1007/s11277-010-9926-6

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  • DOI: https://doi.org/10.1007/s11277-010-9926-6

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