Smoothed Phase-Coded FMCW: Waveform Properties and Transceiver Architecture

Kumbul, Utku; Petrov, Nikita; Vaucher, C.S.; Yarovoy, Alexander

doi:10.1109/taes.2022.3206173

Cited by 9 publications

(19 citation statements)

References 29 publications

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“…To eliminate this unwanted effect, the phase lag compensation (PLC) is performed on the transmitted phase-coded signal before transmission. Such a PLC filter can be written as [17]:…”

Section: Phase Lag Compensated Group Delay Filter Receivermentioning

confidence: 99%

“…Then, the group delay filter ( 12) is applied to the spectrum of (10) and the resulting signal in the time domain becomes [17]:…”

Section: Phase Lag Compensated Group Delay Filter Receivermentioning

confidence: 99%

“…As a result, the delay term τ 0 is eliminated, and each coded beat signal is perfectly aligned. Subsequently, the decoding can be performed by multiplying with the complex conjugate of reference code, and the decoded signal can be obtained as [17]:…”

Section: Phase Lag Compensated Group Delay Filter Receivermentioning

confidence: 99%

“…Consider an automotive radar transmits the PC-FMCW waveform at a carrier frequency f c = 77 GHz with chirp duration T = 25.6 µs and chirp bandwidth B = 300 MHz. In this study, we consider Gaussian Minimum Shift Keying (GMSK) for the phase modulation of communication signal s(t) as it can provide low spectral broadening [17]. We utilize the random code sequences and set the time-bandwidth product of GMSK coding to 0.3.…”

Section: Performance Assessmentmentioning

confidence: 99%

“…As a consequence, the range sidelobe levels increases, especially for a code with large bandwidth due to imperfection in decoding [16]. This undesired effect of the group delay filter receiver is addressed by performing phase lag compensation to the transmitted phase-coded signal before transmission [17]. However, the impact of phase lag compensated group delay filter on the recovery of communication data and the communication performance of such a receiver have not been investigated yet.…”

Section: Introductionmentioning

confidence: 99%

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Performance Analysis of Phase-Coded FMCW for Joint Sensing and Communication

Kumbul

Petrov

Vaucher

et al. 2023

2023 24th International Radar Symposium (IRS)

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Phase-coded frequency modulated continuous wave (PC-FMCW) radars for joint sensing and communication are considered. The sensing and communication performance of the two signal processing methods, phase lag compensated group delay filter and filter bank receivers, are compared. It is demonstrated that the phase lag compensated group delay receiver provides better sensing performance and requires less computational complexity than the filter bank receiver. The application of the former receiver is, however, limited by the bit error rate degradation with the communication signal bandwidth.

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“…To eliminate this unwanted effect, the phase lag compensation (PLC) is performed on the transmitted phase-coded signal before transmission. Such a PLC filter can be written as [17]:…”

Section: Phase Lag Compensated Group Delay Filter Receivermentioning

confidence: 99%

“…Then, the group delay filter ( 12) is applied to the spectrum of (10) and the resulting signal in the time domain becomes [17]:…”

Section: Phase Lag Compensated Group Delay Filter Receivermentioning

confidence: 99%

Section: Phase Lag Compensated Group Delay Filter Receivermentioning

confidence: 99%

Section: Performance Assessmentmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Performance Analysis of Phase-Coded FMCW for Joint Sensing and Communication

Kumbul

Petrov

Vaucher

et al. 2023

2023 24th International Radar Symposium (IRS)

Self Cite

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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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