نویسندگان
1 دانشگاه تربیت دبیر شهید رجائی تهران - دانشکده مهندسی برق
2 دانشگاه تربیت دبیر شهید رجائی تهران - آزمایشگاه تحقیقاتی پردازش سیگنالهای مخابراتی دیجیتال
چکیده
کلیدواژهها
عنوان مقاله [English]
نویسندگان [English]
The main objective of this paper is to jointly estimate three parameters, power, frequency and location of primary users in cognitive radio communications based on cooperative compressed sensing. First, in addition to representing the fundamentals of compressive sensing and system model, three sub-Nyquist reconstruction methods (OMP, CoSaMP and IHT) are described which are based on compressive sensing. Using integrated and separate reconstructions on final decision-making, it is shown that OMP offers higher performance with respect to two other ones in noisy channels. Moreover, a new method for separate reconstruction is proposed which is based on majority decision manner. The new method shows higher performance for estimating three above-mentioned parameters compared to separate method with averaging and integrated one for noisy channels with shadowing. Furthermore, it is shown that it needs lower computational complexity compared to integrated decision-making and approximately the same complexity with respect to separate decision-making with averaging.
کلیدواژهها [English]
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