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In order to deal with the problem when the bandwidth of the passive radars and wideband digital receivers are getting bigger and bigger, causing that the traditional signal detection methods need a high sampling rate and a large number of sampling points. This paper extends the modulated wideband converter (MWC) which is recently proposed compressed sensing techniques to discrete-time domain in order...
For the problem that the sensitivity greatly reduces when the bandwidth of wideband digital receivers increases and the problem of cross-channel signal caused by uniform channelized wideband digital receivers, a new receiver based on modulated wideband converter (MWC) discrete compressed sampling structure is proposed and the proposed structure is improved to compressively sample radar signals and...
As energy saving and environmental protection become an inevitable trend, researchers need to shift their focus to “green” oriented architecture design. Recent advances in the area of cognitive radio (CR) have significant potential towards “green” communications. One of the critical challenges for operating CRs in a wireless mesh network is how to efficiently allocate transmission powers and frequency...
For WPAN (Wireless Personal Area Network) applications, a low-power low-noise IF (Intermediate-Frequency) circuit is proposed for GFSK (Gauss Frequency Shift Keying) low-IF receivers. The proposed IF system is realized by an all-analog architecture, which is composed of a couple of LAs (Limiting Amplifiers) and RSSIs (Received Signal Strength Indicators), a couple of BPFs (Band-Pass Filters), a FD...
In this paper, we analyze the challenges of the interference environment in a hybrid network that consists of the device-to-device (D2D communication based ad-hoc connections and conventional cellular connections. Accordingly, time hopping (TH) based radio resource allocation schemes aiming to improve the robustness of the hybrid network are proposed. The performance improvement even with the simple...
In a cellular network system one way to increase its capacity is to allow direct communication between closely located user devices when they are communicating with each other instead of conveying data from one device to the other via the radio and core network. The problem is then when the network shall assign direct communication mode and when not. In previous works the decision has been done individually...
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