Compressive slow-varying wideband power spectrum sensing for cognitive radio

Liu, Yipeng; Wan, Qun

doi:10.1007/s12243-013-0414-3

Cited by 2 publications

(1 citation statement)

References 31 publications

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“…With the development of digital signal processing technology, electronic warfare receivers are widely used to be digitalized and realized by software [1], [2]. As a structure of digital receivers, digital channelized receiver has some advantages of large instantaneous bandwidth, large dynamic range, high sensitivity and processing simultaneous arrival signals [3].…”

Section: Introductionmentioning

confidence: 99%

Design and FPGA Implementation of a Novel Efficient FRM-Based Channelized Receiver Structure

et al. 2019

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The main application of the filter bank in radar signal processing is the wideband digital channelized receiver. In order to save hardware resources of the field programmable gate array (FPGA), the efficient channelized receiver structure using polyphase filter has been designed. However, when the number of channels is greatly increased or the transition bandwidth of the filter bank (FB) becomes very narrow, it still consumes large amounts of hardware resources. Therefore, a novel efficient channelized receiver structure based on frequency response masking (FRM) and modulation filter bank is proposed in this paper. The proposed novel structure has less computational complexity in implementing FB with narrow transition bandwidth (NTB). Compared with other efficient FRM-based structures, the proposed novel structure is more suitable for wideband digital channelization receiver. The proposed novel structure is verified correctly by Matlab simulation. The FPGA implementation of the polyphase channelized receiver structure and the proposed novel efficient FRM-based channelized receiver structure are completed by Xilinx System Generator. The result shows that the proposed novel efficient FRM-based channelized receiver structure can save 48.09% of the DSP48E1 hardware resources compared with the polyphase channelized receiver structure and has low group delay characteristic. INDEX TERMS Frequency response masking, narrow transition bandwidth, channelized receiver, field programmable gate array. II. REVIEW OF POLYPHASE STRUCTURE FOR CHANNELIZED RECEIVER A. MODULATION FILTER BANK

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Section: Introductionmentioning

confidence: 99%

Design and FPGA Implementation of a Novel Efficient FRM-Based Channelized Receiver Structure

et al. 2019

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A novel channelized FB architecture with narrow transition bandwidth based on CEM FRM

Chen

Zhang

et al. 2015

Ann. Telecommun.

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The two key requirements of channelized filter bank in the design of a digital receiver are low computational complexity and reconfigurability. Modulated discrete Fourier transform (MDFT) filter bank permits sub-channel with linear phase characteristics and provides high degree of computational efficiency. However, with sub-channel exhibiting narrow transition bandwidth in MDFT filter bank, the length of the prototype filter becomes long prohibitively, which can reduce the computational efficiency. It is well known that the frequency response masking (FRM) provides an attractive technique for the realization of digital filters with very narrow transition bandwidth. In this paper, the FRM digital filter design technique and another important technique named complex-exponential modulation (CEM) are exploited and applied to the design of a novel cascaded channelized filter bank to realize selective sub-channel with very narrow transition bandwidth. A simulation is provided to illustrate the design of the proposed CEM filter bank. It is shown that the resulting filter bank entails less computational complexity substantially and reduces multiplier resource consumption comparing to the conventional MDFT filter bank.

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Compressive slow-varying wideband power spectrum sensing for cognitive radio

Cited by 2 publications

References 31 publications

Design and FPGA Implementation of a Novel Efficient FRM-Based Channelized Receiver Structure

Design and FPGA Implementation of a Novel Efficient FRM-Based Channelized Receiver Structure

A novel channelized FB architecture with narrow transition bandwidth based on CEM FRM

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