IF digitization receiver of wideband digital array radar test-bed

Li, Weixing; Zhang, Yue; Lin, Jianzhi; Chen, Zengping

doi:10.1117/12.2067205

Cited by 2 publications

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“…Digital electronics play a key role in a radar’s ability to handle complex environments. Additional dynamic range is achieved by moving these digital components as close to the receiver as possible [ 41 ]. The core components of the SAS system consist of the Pentek downconverters and analog-to-digital converters (ADCs).…”

Section: Spectrum Analysis Solution (Sas) System Design Consideratmentioning

confidence: 99%

The Spectrum Analysis Solution (SAS) System: Theoretical Analysis, Hardware Design and Implementation

Narayanan

Pooler

Martone

et al. 2018

Sensors

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This paper describes a multichannel super-heterodyne signal analyzer, called the Spectrum Analysis Solution (SAS), which performs multi-purpose spectrum sensing to support spectrally adaptive and cognitive radar applications. The SAS operates from ultrahigh frequency (UHF) to the S-band and features a wideband channel with eight narrowband channels. The wideband channel acts as a monitoring channel that can be used to tune the instantaneous band of the narrowband channels to areas of interest in the spectrum. The data collected from the SAS has been utilized to develop spectrum sensing algorithms for the budding field of spectrum sharing (SS) radar. Bandwidth (BW), average total power, percent occupancy (PO), signal-to-interference-plus-noise ratio (SINR), and power spectral entropy (PSE) have been examined as metrics for the characterization of the spectrum. These metrics are utilized to determine a contiguous optimal sub-band (OSB) for a SS radar transmission in a given spectrum for different modalities. Three OSB algorithms are presented and evaluated: the spectrum sensing multi objective (SS-MO), the spectrum sensing with brute force PSE (SS-BFE), and the spectrum sensing multi-objective with brute force PSE (SS-MO-BFE).

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Section: Spectrum Analysis Solution (Sas) System Design Consideratmentioning

confidence: 99%

The Spectrum Analysis Solution (SAS) System: Theoretical Analysis, Hardware Design and Implementation

Narayanan

Pooler

Martone

et al. 2018

Sensors

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“…With the development of high-speed ADCs, direct sample to wideband intermediate frequency (IF) signal conversion is possible. Recently, the Science and Technology for Automatic Target Recognition (ATR) Laboratory developed a digital array radar (DAR) test-bed using direct wideband radio frequency (RF) digitization [ 19 , 20 ]. The test-bed works at the IF of 0.6–3.0 GHz.…”

Section: Introductionmentioning

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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IF digitization receiver of wideband digital array radar test-bed

Cited by 2 publications

References 0 publications

The Spectrum Analysis Solution (SAS) System: Theoretical Analysis, Hardware Design and Implementation

The Spectrum Analysis Solution (SAS) System: Theoretical Analysis, Hardware Design and Implementation

A Channelization-Based DOA Estimation Method for Wideband Signals

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