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Spectrum sensing is a crucial measure for cognitive radio networks (CRN) to protect transmission of primary users. Cooperative spectrum sensing is regarded as the most promising method to improve the reliability of spectrum sensing. However, such cooperation also introduces overhead traffic of control signaling and result transmission which consumes more power in battery-operated mobile terminals...
Motivated by [1], we consider the problem of simultaneous message transmission and state estimation over Gaussian broadcast channels. In particular, two independent messages are transmitted over a state dependent Gaussian broadcast channel with noncausal side information at the transmitter. The receivers, in addition to decode their own messages, also try to estimate the state information. Using squared-error...
In cognitive radio networks, secondary users (SUs) opportunistically exploit the spectrum unutilized by primary users (PUs). In this paper, we study the secondary communication where secondary transmitters and receivers have different available spectrum. Considering the spectrum diversity and the space distance between different PUs, we introduce cognitive relay node into the secondary communication...
The special bistatic space based radar (BiSBR) system, which is composed of an illuminator on a geostationary satellite and a receiver on an airship, can be operated for area surveillance. It is anticipant for the realization of detection and tracking capabilities to moving targets that the high signal-to-noise ratio (SNR) is distributed uniformly in the theater area. In this paper, based on three...
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