摘要： In this letter, we proposed a novel spectrum and energy cooperation strategy in a hierarchical cognitive radio (HCR) cellular network. In our design, the primary receiver (PR) is equipped with a time-splitting energy harvesting (EH) device such that the primary system (PS) can share its spectrum to the secondary system (SS) and harvest the radiation for charging from the secondary base station (SB) in return. To achieve such a win-win strategy, the SB's precoder and the time-splitting factor are jointly optimized by maximizing the SS's information rate, providing that the PS's information rate and harvested energy are guaranteed. The design problem is equivalently formulated and solved via a semidefinite relaxation (SDR) optimization approach. Simulation results show the promising performance of the proposed cooperation strategy. 其他題名： LWC 出版者： Piscataway: IEEE 出版日期： 2016-06-01 出處： IEEE Wireless Communications Letters, 2016-06, Vol.5 (3), p.252-255 資源來源： IEEE Electronic Library (IEL) 版權： Copyright The Institute of Electrical and Electronics Engineers, Inc. (IEEE) 2016 識別號： ISSN: 2162-2337 識別號： EISSN: 2162-2345 識別號： DOI: 10.1109/LWC.2016.2531078 識別號： CODEN: IWCLAF
