Doppler Shift Tolerance of Accumulation and Outer Coding in MIMO-PMCW Radar

Oliveira, Lucas Giroto de; Bekker, Elizabeth; Bhutani, Akanksha; Diewald, Axel; Nuß, Benjamin; Antes, Theresa; Zwick, Thomas

doi:10.1109/lmwc.2021.3123691

Cited by 11 publications

(10 citation statements)

References 21 publications

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“…In order for Golay sequences A and B to be separately transmitted, a multiplexing strategy has to be chosen, being the most common one time-division multiplexing (TDM). Although CDM, e.g., with Hadamard codes, could be used and still keep the aforementioned complementary sequences binary, it would result in an even longer measurement time [8,16,23]. To avoid mutual interference between those sequences, it is henceforth assumed that cyclic prefixs (CPs) of length N Golay CP are pretended to each of them before their successive transmission.…”

Section: Golay Sequencesmentioning

confidence: 99%

“…Defining a frequency resolution ∆ f = F s /N PRBS for the considered SISO-PMCW radar system, which follows the same principle of subcarrier frequency spacing or bandwidth in OFDM-based systems, one can define a normalized Doppler shift parameter as f D /∆ f [23]. Besides the static case, where f D /∆ f = 0 is experienced, two important points in the f D /∆ f axis are | f D /∆ f | = 0.1, which is usually assumed as the maximum tolerable normalized Doppler shift in OFDM-based radar and communication systems [24,35], and | f D /∆ f | = 0.5, which is associated with the maximum unambiguous velocity of the considered SISO-PMCW radar system given by v max,unamb = (0.5∆ f )c 0 /(2 f c ).…”

Section: Evaluation Of Doppler Shift Distortion Of Range Profilesmentioning

confidence: 99%

“…It is worth highlighting that although using shorter CP lengths would yield less PPLR degradation and higher maximum unambiguous velocity, it would also reduce the maximum unambiguous range. For a more detailed description of the non-coherent accumulation effect, the reader is referred to the analysis in a previous study [23].…”

Section: Peak Power Loss Ratiomentioning

confidence: 99%

“…An analysis of the Doppler shift tolerance of the oversampled PACFs of the aforementioned PRBSs for different sequence lengths. For this analysis, a normalized Doppler shift parameter introduced in a previous article [23] was adopted and sequences that achieve similar maximum unambiguous range were compared by using peak power loss ratio (PPLR), peak sidelobe level ratio (PSLR), and integrated-sidelobe level ratio (ISLR) as metrics.…”

mentioning

confidence: 99%

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Doppler Shift Tolerance of Typical Pseudorandom Binary Sequences in PMCW Radar

Oliveira

Antes

Nuß

et al. 2022

Sensors

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In the context of all-digital radar systems, phase-modulated continuous wave (PMCW) based on pseudorandom binary sequences (PRBSs) appears to be a prominent candidate modulation scheme for applications such as autonomous driving. Among the reasons for its candidacy are its simplified transmitter architecture and lower linearity requirements (e.g., compared to orthogonal-frequency division multiplexing radars), as well as its high velocity unambiguity and multiple-input multiple-output operation capability, all of which are characteristic of digital radars. For appropriate operation of a PMCW radar, choosing a PRBS whose periodic autocorrelation function (PACF) has low sidelobes and high robustness to Doppler shifts is paramount. In this sense, this article performs an analysis of Doppler shift tolerance of the PACFs of typically adopted PRBSs in PMCW radar systems supported by simulation and measurement results. To accurately measure the Doppler-shift-induced degradation of PACFs, peak power loss ratio (PPLR), peak sidelobe level ratio (PSLR), and integrated-sidelobe level ratio (ISLR) were used as metrics. Furthermore, to account for effects on targets whose ranges are not multiples of the range resolution, oversampled PACFs are analyzed.

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Section: Golay Sequencesmentioning

confidence: 99%

Section: Evaluation Of Doppler Shift Distortion Of Range Profilesmentioning

confidence: 99%

Section: Peak Power Loss Ratiomentioning

confidence: 99%

mentioning

confidence: 99%

See 2 more Smart Citations

Doppler Shift Tolerance of Typical Pseudorandom Binary Sequences in PMCW Radar

Oliveira

Antes

Nuß

et al. 2022

Sensors

Self Cite

View full text Add to dashboard Cite

show abstract

“…• An analysis of the Doppler shift tolerance of the oversampled PACFs of the aforementioned PRBSs for different sequence lengths. For this analysis, a normalized Doppler shift parameter introduced in a previous article [23] was adopted and sequences that achieve similar maximum unambiguous range were compared using peak power loss ratio (PPLR), peak sidelobe level ratio (PSLR), and integrated-sidelobe level ratio (ISLR) as metrics.…”

Section: Introductionmentioning

confidence: 99%

Doppler Shift Tolerance of Typical Pseudorandom Binary Sequences in PMCW Radar

Oliveira¹,

Antes²,

Nuß³

et al. 2022

Preprint

View full text Add to dashboard Cite

In the context of all-digital radar systems, phase-modulated continuous wave (PMCW) based on pseudorandom binary sequences (PRBSs) appears a prominent candidate modulation scheme for applications such as autonomous driving. Among the reasons for that are its simplified transmitter architecture and lower linearity requirements, e.g., compared to orthogonal-frequency division multiplexing radars, as well as its high velocity unambiguity and multiple-input multiple-output operation capability that are characteristic of digital radars. For appropriate operation of a PMCW radar, choosing a PRBS whose periodic autocorrelation function (PACF) has low sidelobes and high robustness to Doppler shifts is paramount. In this sense, this article performs an analysis of Doppler shift tolerance of the PACFs of typically adopted PRBSs in PMCW radar systems supported by simulation and measurement results. To accurately measure the Doppler-shift-induced degradation of PACFs, peak power loss ratio (PPLR), peak sidelobe level ratio (PSLR), and integrated-sidelobe level ratio (ISLR) were used as metrics. Furthermore, to account for effects on targets whose ranges are not multiples of the range resolution, oversampled PACFs are analyzed.

show abstract