Reconstruction and Reciprocal Filter of OFDM Waveforms for DVB-T2 Based Passive Radar

Bok, Dominik

doi:10.1109/radar.2018.8557339

Cited by 4 publications

(4 citation statements)

References 11 publications

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“…The relation ( 18) is thereby only range (τ) dependent with u = max(0, τ − α) outside of the guard duration α [25]. Its derivation is given in Appendix A.…”

Section: Implication Of a Linear Target Movement In Batched Range-dopmentioning

confidence: 99%

“…The implementation has to consider that this technique requires an interpolation of every fast-time sub-carrier so that the effort increases proportional to this count. A DVB-T2 waveform can for example incorporate up to 27,841 active sub-carriers in one 32k OFDM symbol duration of T u = 3.5 ms in 8 MHz channels [25,40]. Depending on the interpolation method, this can lead to a significant amount of added latency.…”

Section: Common Time-scale Analysis Implementation Techniques For Batmentioning

confidence: 99%

“…A proper identification is then required to associate detections for compensation correctly (Section 6.3) and also to estimate the target speed with its prospective movement for tracking. The remaining Gross Doppler induced frequency sensitivity Loss PC Equation (18) will need special attention in batched pulse compression schemes because this loss can become severe for a long block duration T b even for small effective velocities [25]. Strong clutter or targets present in adjacent unambiguous windows will defocus but these can still overlay the returns in the currently processed window.…”

Section: Remaining Limitations Of Velocity Spread Compensation On Thementioning

confidence: 99%

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Effects of Movement for High Time-Bandwidths in Batched Pulse Compression Range-Doppler Radar

Bok

O’Hagan

Knott

2021

Sensors

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Radar detection and track building performance is an essential part of a radar system. A high realized coherent integration gain often contributes to an improved performance. This is essential to the successful detection and tracking of weak moving targets. However, the actual movement within the coherent processing interval can introduce range walk effects. The processing will then result in range and Doppler frequency resolutions that become finer than a single moving point scatterer’s spread over range and—often not considered—over Doppler frequency. In particular for a wide instantaneous bandwidth, the impact on the achievable integration gain can become severe already for a constant effective velocity. Therefore, high desired integration gains as required in passive radar are not easily achieved against relatively fast moving targets. The main intent of this article is to present the movement effects on a classical range-Doppler analysis to give an insight on the achievable performance and to quantify otherwise appearing degradations. Interestingly, a classical analysis of experimental datasets evaluated from a DVB-T based passive radar measurement campaign even resolved the fluctuation of a target response within the instantaneously processed bandwidth. The findings strengthen the need for advanced processing methods that can at least partly address individual implications of fast moving targets in real-time applications properly.

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“…The relation ( 18) is thereby only range (τ) dependent with u = max(0, τ − α) outside of the guard duration α [25]. Its derivation is given in Appendix A.…”

Section: Implication Of a Linear Target Movement In Batched Range-dopmentioning

confidence: 99%

Section: Common Time-scale Analysis Implementation Techniques For Batmentioning

confidence: 99%

Section: Remaining Limitations Of Velocity Spread Compensation On Thementioning

confidence: 99%

See 1 more Smart Citation

Effects of Movement for High Time-Bandwidths in Batched Pulse Compression Range-Doppler Radar

Bok

O’Hagan

Knott

2021

Sensors

Self Cite

View full text Add to dashboard Cite

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“…There has been emerging interest in exploiting the external non-radar transmitters for PBR. The available transmissions include frequency modulation (FM) (Colone et al, 2013;Martelli et al, 2018), analogue television (ATV) (Zaimbashi, 2017;Chen et al, 2018), digital television (DTV) (Bournaka et al, 2017;Bok, 2018), the Global System for Mobile communication (GSM) (Lu et al, 2007;Tabassum et al, 2016), Long-Term Evolution (LTE) (Salah et al, 2013;Abdullah et al, 2016), wireless fidelity (Wi-Fi) (Milani et al, 2018), and the Global Navigation Satellite System (GNSS) (Clemente and Soraghan, 2014;Ma et al, 2018).…”

Section: Introductionmentioning

confidence: 99%

Robust mismatched filtering algorithm for passive bistatic radar using worst-case performance optimization

Chen

Wang

2020

Front Inform Technol Electron Eng

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Passive bistatic radar detects targets by exploiting available local broadcasters and communication transmissions as illuminators, which are not designed for radar. The signal usually contains a time-varying structure, which may result in high-level range ambiguity sidelobes. Because the mismatched filter is effective in suppressing sidelobes, it can be used in a passive bistatic radar. However, due to the low signal-to-noise ratio in the reference signal, the sidelobe suppression performance seriously degrades in a passive bistatic radar system. To solve this problem, a novel mismatched filtering algorithm is developed using worst-case performance optimization. In this algorithm, the influence of the low energy level in the reference signal is taken into consideration, and a new cost function is built based on worst-case performance optimization. With this optimization, the mismatched filter weights can be obtained by minimizing the total energy of the ambiguity range sidelobes. Quantitative evaluations and simulation results demonstrate that the proposed algorithm can realize sidelobe suppression when there is a low-energy reference signal. Its effectiveness is proved using real data.

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OFDM Waveform Synchronisation for Multistatic Radar and DVB-T2 Illumination

Bok

Heckenbach

2019

2019 International Radar Conference (RADAR)

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Reconstruction and Reciprocal Filter of OFDM Waveforms for DVB-T2 Based Passive Radar

Cited by 4 publications

References 11 publications

Effects of Movement for High Time-Bandwidths in Batched Pulse Compression Range-Doppler Radar

Effects of Movement for High Time-Bandwidths in Batched Pulse Compression Range-Doppler Radar

Robust mismatched filtering algorithm for passive bistatic radar using worst-case performance optimization

OFDM Waveform Synchronisation for Multistatic Radar and DVB-T2 Illumination

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