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

Reneau, Jason; Adhami, Reza R.

doi:10.2528/pierb18082006

Cited by 4 publications

(1 citation statement)

References 35 publications

(37 reference statements)

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“…In some cases, this assumption may not be true and the envelope of the received signal needs to be aligned before decoding. The initial system design for a phase-coded linear frequency modulated continuous wave (PC-LFMCW) radar was introduced at [15], [16], without considering the coded beat frequency shifts due to different target delays. As emphasized in the literature, the misalignment of the returned signal is an important issue and this needs to be corrected to achieve the best SNR.…”

Section: Introductionmentioning

confidence: 99%

Phase-Coded FMCW Automotive Radar: System Design and Interference Mitigation

Uysal

2020

IEEE Trans. Veh. Technol.

102

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A frequency-modulated continuous-wave (FMCW) radar takes advantage of stretch processing (dechirping, deramping) to reduce the sampling requirements of radar systems such as automotive radars. When applying phase coding into FMCW radar systems for interference mitigation or joint communication, preservation of this benefit is not possible, due to the nature of this process. This paper proposes a new phase coded FMCW system as well as a processing strategy based on a groupdelay filter to deal with unaligned phase-coded radar return signals. Moreover, this paper proposes an improved interference mitigation method based on a phase-coded linear-frequencymodulated (LFM) continuous waveform and points out the improvements in the signal-to-interference ratio (SIR). In the proposed mitigation technique, unlike the traditional approach where RF spectrum spreads, the beat frequency spectrum of the FMCW radar spreads, thus the bandwidth of RF hardware stays the same as a classical LFM continuous wave radar. The success of the proposed phase coded frequency-modulated continuous-wave (PC-FMCW) radar is illustrated in simulations and increased interference mitigation performance is validated by experiments.

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Section: Introductionmentioning

confidence: 99%

Phase-Coded FMCW Automotive Radar: System Design and Interference Mitigation

Uysal

2020

IEEE Trans. Veh. Technol.

102

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A Compound ECCM Technique for FMCW Radars

2023

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This paper presents a compound electronic counter-countermeasure (ECCM) technique for frequency-modulated continuous-wave (FMCW) radars to counter electronic countermeasure (ECM) techniques such as coherent spoofing, non-coherent spoofing, and digital radio frequency memory (DRFM) jamming. The proposed technique is based on phase coding in slow time and checking the initial phase of the baseband return signal. A measurement setup was built and operated between 4.3-4.5 GHz for experimental validation. An RF cable of length 12 m was used to emulate the target. The experimental results were analyzed using MATLAB to demonstrate the effectiveness of the ECCM technique in different jamming scenarios. The results indicate that the proposed ECCM technique using phase coding can provide a satisfactory performance in different jamming scenarios. The proposed ECCM technique offers several advantages over existing methods. First, the technique does not entail any frequency bin changes in slow time period, thereby conferring processing benefits. Second, it poses challenges to jammer system in terms of predicting the initial phase of the beat signal. The proposed technique is expected to provide better protection against malicious attacks for FMCW radars.INDEX TERMS Coherent spoofing, digital radio frequency memory (DRFM), electronic counter-counter measure (ECCM), frequency-modulated continuous-wave (FMCW) radar, phase coding.

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