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Interference cancellation scheme for uplink cognitive radio systems

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This paper investigates the interference cancellation (IC) scheme for uplink cognitive radio systems, using the spectrum underlay strategy where the primary users (PUs) and the secondary users (SUs) coexist and operate in the same spectrum. Joint MMSE-based parallel interference cancellation (PIC) and Turbo decoding scheme is proposed to reduce the interference to the PUs, as well as to the SUs, in which the minimum mean square estimation (MMSE) filter is only employed in the first iteration, regarded as the "weakest link" of the whole detection process, to improve the quality of the preliminary detections results before they are fed to the Turbo decoder. Simulation results show that the proposed scheme can efficiently eliminate the interference to the PUs, as well as to the SUs.

cognitive radioparallel interference cancellation (PIC)Turbo decodingminimum mean square estimation (MMSE)spectrum underlay

WU Zhuo、YAN Li-jia

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Key Laboratory of Speciality Fiber Optics and Optical Access Networks, School of Communication and Information Engineering, Shanghai University, Shanghai 200072, P. R. China

国家自然科学基金Development Foundation of the Education Commission of Shanghai MunicipalityShanghai Pujiang ProgramScience and Technology Commission of Shanghai Municipality

6097205509CG4008PJ1405710220710300

2011

10.1007/s11741-011-0683-2

上海大学学报(英文版)
上海大学

上海大学学报(英文版)

影响因子：0.196
ISSN：1007-6417
年,卷(期)：2011.15(1)
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