Design and Implementation of Digital Channelized Receiver in Multi-FPGA

Xu, Sai; Liu, Guoman; Gao, Meiguo

doi:10.1109/icise.2009.461

Cited by 11 publications

(4 citation statements)

References 2 publications

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“…The output SNR is improved approximately

times. Finally, the channelization receiver can be implemented in a parallel processing architecture, consequently it is able to tackle real-time processing on hardware platforms [ 29 , 30 ]. In virtue of these advantages, the proposed channelization-based method shows a better performance over the conventional ISM and TOPS methods.…”

Section: The Proposed Methodsmentioning

confidence: 99%

A Channelization-Based DOA Estimation Method for Wideband Signals

Guo

Zhang

Lin

et al. 2016

Sensors

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Abstract:In this paper, we propose a novel direction of arrival (DOA) estimation method for wideband signals with sensor arrays. The proposed method splits the wideband array output into multiple frequency sub-channels and estimates the signal parameters using a digital channelization receiver. Based on the output sub-channels, a channelization-based incoherent signal subspace method (Channelization-ISM) and a channelization-based test of orthogonality of projected subspaces method (Channelization-TOPS) are proposed. Channelization-ISM applies narrowband signal subspace methods on each sub-channel independently. Then the arithmetic mean or geometric mean of the estimated DOAs from each sub-channel gives the final result. Channelization-TOPS measures the orthogonality between the signal and the noise subspaces of the output sub-channels to estimate DOAs. The proposed channelization-based method isolates signals in different bandwidths reasonably and improves the output SNR. It outperforms the conventional ISM and TOPS methods on estimation accuracy and dynamic range, especially in real environments. Besides, the parallel processing architecture makes it easy to implement on hardware. A wideband digital array radar (DAR) using direct wideband radio frequency (RF) digitization is presented. Experiments carried out in a microwave anechoic chamber with the wideband DAR are presented to demonstrate the performance. The results verify the effectiveness of the proposed method.

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“…The output SNR is improved approximately

Section: The Proposed Methodsmentioning

confidence: 99%

A Channelization-Based DOA Estimation Method for Wideband Signals

Guo

Zhang

Lin

et al. 2016

Sensors

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show abstract

“…The non-ideal characteristics of the finite order lowpass filter cause the monitor blind spots between adjacent channels, which will result in the loss of signals. A method to avoid this effect is to make the passband of the lowpass filter cover the entire channel and allow the transitional band to extend to adjacent channels [3]. Taking four subchannels for example, the frequency division of the whole coverage band is shown in Fig.…”

Section: Lowpass Filter and Decimationmentioning

confidence: 99%

“…When α = π/2, the architecture of the channelized receiver shown in Fig. 4 becomes the architecture in the Fourier domain as described in [3]. So the architecture of the channelized receiver in the FRFD can be regarded as a generalization of that in the traditional Fourier domain.…”

Section: Channelized Implementation Based On Polyphase Filter For The...mentioning

confidence: 99%

“…Its attractive characteristics include broadband instantaneous frequency coverage, good sensitivity and dynamic range, simultaneous signal detection, as described in [1]. The design and implementation of digital channelized receivers in the traditional Fourier domain were extensively studied, and it was demonstrated that the receiver designed in the Fourier domain had a good effect on the stationary signal, but not on the nonstationary signal [2,3].…”

Section: Introductionmentioning

confidence: 99%

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Design and simulation of digital channelized receivers in fractional Fourier domain

Tang

Yuan

Bao

et al. 2013

J. of Syst. Eng. Electron.

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An approach is proposed to realize a digital channelized receiver in the fractional Fourier domain (FRFD) for signal intercept applications. The presented architecture can be considered as a generalization of that in the traditional Fourier domain. Since the linear frequency modulation (LFM) signal has a good energy concentration in the FRFD, by choosing an appropriate fractional Fourier transform (FRFT) order, the presented architecture can concentrate the broadband LFM signal into only one sub-channel and that will prevent it from crossing several sub-channels. Thus the performance of the signal detection and parameter estimation after the sub-channel output will be improved significantly. The computational complexity is reduced enormously due to the implementation of the polyphase filter bank decomposition, thus the proposed architecture can be realized as efficiently as in the Fourier domain. The related simulation results are presented to verify the validity of the theories and methods involved in this paper.

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The reception and separation of simultaneous signals with broadband

Liu

Zhao

et al. 2012

2012 5th International Congress on Image and Signal Processing

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Design and Implementation of Digital Channelized Receiver in Multi-FPGA

Cited by 11 publications

References 2 publications

A Channelization-Based DOA Estimation Method for Wideband Signals

A Channelization-Based DOA Estimation Method for Wideband Signals

Design and simulation of digital channelized receivers in fractional Fourier domain

The reception and separation of simultaneous signals with broadband

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