Complementary phase coded LFM waveform for SAR

Seleym, Ashraf

doi:10.1109/icnsurv.2016.7486346

Cited by 4 publications

(2 citation statements)

References 4 publications

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“…Several methods are used for sidelobe reduction: In [ 10 ], the complementary method was applied for LFM waveform to completely remove the sidelobes, where sequential complementary codes (pulse-to-pulse) are transmitted sequentially. However, this method has many barriers in real applications [ 11 , 12 ].…”

Section: Introductionmentioning

confidence: 99%

Design and Implementation of an Enhanced Matched Filter for Sidelobe Reduction of Pulsed Linear Frequency Modulation Radar

Azouz

Abosekeen

Nassar

et al. 2021

Sensors

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Pulse compression techniques are commonly used in linear frequency modulated (LFM) waveforms to improve the signal-to-noise ratios (SNRs) and range resolutions of pulsed radars, whose detection capabilities are affected by the sidelobes. In this study, a sidelobe reduction filter (SRF) was designed and implemented using software defined radio (SDR). An enhanced matched filter (EMF) that combines a matched filter (MF) and an SRF is proposed and was implemented. In contrast to the current commonly used approaches, the mathematical model of the SRF frequency response is extracted without depending on any iteration methods or adaptive techniques, which results in increased efficiency and computational speed for the developed model. The performance of the proposed EMF was verified through the measurement of four metrics, including the peak sidelobe ratio (PSLR), the impulse response width (IRW), the mainlobe loss ratio (MLR), and the receiver operational characteristics (ROCs) at different SNRs. The ambiguity function was then used to characterize the Doppler effect on the designed EMF. In addition, the detection of single and multiple targets using the proposed EMF was performed, and the results showed that it overcame the masking problem due to its effective reduction of the sidelobes. Hence, the practical application of the EMF matches the performance analysis. Moreover, when implementing the EMF proposed in this paper, it outperformed the common MF, especially when detecting targets moving at low speeds and having small radar cross-sections (RCS), even under severe masking conditions.

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Section: Introductionmentioning

confidence: 99%

Design and Implementation of an Enhanced Matched Filter for Sidelobe Reduction of Pulsed Linear Frequency Modulation Radar

Azouz

Abosekeen

Nassar

et al. 2021

Sensors

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“…Examples of these types of waveforms include multi-frequency carrier OFDM [5][6][7], combined LFM/Barker codes [8,9] and combined LFM/PRN phase codes [10,11]. Traditional radar applications for these type of complex waveforms include marine radar [11], synthetic aperture radar (SAR) [12] and collision avoidance radar [13]. Non-traditional applications of these types of complex modulations include ultrasound imaging [14] and combined radarcommunication waveforms [7].…”

Section: Introductionmentioning

confidence: 99%

Design of a Short Range Continuous Wave Compound Phase Coded Linear Frequency Modulation Radar Sensor

Reneau¹,

Adhami²

2018

PIER B

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The design of a low cost, short range radar sensor based upon a novel phase coded linear frequency waveform is discussed in this paper. The radar sensor utilizes a novel waveform that is produced using digital frequency synthesis techniques. Digital frequency synthesis techniques enable the generation of repeatable, highly linear frequency sweeps and provide a means for accurate application of phase codes to linear frequency modulations. The work presented contains analysis of the component linear frequency and phase code modulations that form the compound phase coded linear frequency modulation. The resulting compound phase coded linear frequency modulation is compared with the component modulations to demonstrate the performance improvement that can be achieved by the combining of radar waveform modulations enabled by modern digital frequency synthesis techniques. The compound phase coded linear frequency modulation waveform shows improved range resolution and suppression of range sidelobes over the individual component waveforms. The phase coded linear frequency modulation shows an improvement of 13 dB over the linear frequency modulation and is only 2 dB less than the phase code. It also achieves a 5 and 10 nanosecond narrower mainlobe autocorrelation peak than the phase code and linear frequency modulation, respectively. A notional signal processing architecture of the waveform is simulated to demonstrate the ability to process the compound waveform. Experimental data collected from a direct digital frequency synthesis based arbitrary waveform generator is compared with the simulated waveform. The compound waveform model and the experimental results show good agreement.

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Novel Sidelobe cancellation for Compound-Barker Combined with LFM or Polyphase Waveform

Azouz

2020

2020 12th International Conference on Electrical Engineering (ICEENG)

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Complementary phase coded LFM waveform for SAR

Cited by 4 publications

References 4 publications

Design and Implementation of an Enhanced Matched Filter for Sidelobe Reduction of Pulsed Linear Frequency Modulation Radar

Design and Implementation of an Enhanced Matched Filter for Sidelobe Reduction of Pulsed Linear Frequency Modulation Radar

Design of a Short Range Continuous Wave Compound Phase Coded Linear Frequency Modulation Radar Sensor

Novel Sidelobe cancellation for Compound-Barker Combined with LFM or Polyphase Waveform

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