OFDM Waveform Synchronisation for Multistatic Radar and DVB-T2 Illumination

Bok, Dominik; Heckenbach, Jörg

doi:10.1109/radar41533.2019.171330

Cited by 2 publications

(2 citation statements)

References 13 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Long covered timespans and high instantaneous bandwidths lead to increased demands regarding stability, linearity and intermodulation requirements that have to be properly addressed. Furthermore, the synchronisation to the received signal stream [32] will influence the accuracy and capability of target ranging.…”

Section: Discussion Of Findings and Consideration For Processing Apprmentioning

confidence: 99%

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

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.

show abstract

Section: Discussion Of Findings and Consideration For Processing Apprmentioning

confidence: 99%

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

show abstract

“…Several articles on radar systems have addressed the issue of synchronization. For example, in Bok and Heckenbach [21] and Haglund and others [22], synchronization has been examined in the structure of multistatic radars. In Karami and Bahramgiri [23], in passive radar synchronization, three criteria have been presented, and their performance has been investigated in two stages: fine timing synchronization and coarse timing synchronization.…”

Section: Introductionmentioning

confidence: 99%

Joint synchronization and parameter estimation in OFDM signaling

Karami

Bahramgiri

2022

ETRI Journal

View full text Add to dashboard Cite

Challenges in cognitive radio and tactical communications include recognizing anonymously received signals and estimating parameters in a blind or semiblind manner. In this paper, we examine this issue for orthogonal frequency division multiplexing (OFDM) signaling. There are several parameters in OFDM signaling, and the blind receiver must extract and consider the synchronization issue. We assume that the blind receiver is aware of modulation type, OFDM, and not aware of chip duration and the length of cyclic prefix. First, we present new criteria based on kurtosis to estimate these parameters and compare their performance at different levels of additive white Gaussian noise with methods based on correlation, kurtosis, maximum likelihood, and matched filter. Then, we perform synchronization and estimate the start time based on these criteria and several new criteria in two steps: fine and coarse synchronization. Finally, in a more practical setup, we present the idea of jointly estimating the mentioned parameters and the signal start time as coarse synchronization. We compare different criteria and show that one of the proposed criteria has the highest efficiency.

show abstract

OFDM Waveform Synchronisation for Multistatic Radar and DVB-T2 Illumination

Cited by 2 publications

References 13 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

Joint synchronization and parameter estimation in OFDM signaling

Contact Info

Product

Resources

About