Frequency Comb Generation for High Range Resolution OFDM Radar

Quint, Alexander; Nuß, Benjamin; Diewald, Axel; Zwick, Thomas

doi:10.23919/eurad50154.2022.9784574

Cited by 4 publications

(7 citation statements)

References 10 publications

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“…The frequency comb generation in the baseband is performed by approximating the frequency comb in the time domain with a rectangular-shaped function [1]. Every time period of the ideal frequency comb is divided into n = 4 sections with a constant voltage level as shown in Fig.…”

Section: Frequency Comb Generation In the Basebandmentioning

confidence: 99%

“…This has two reasons. The first reason is the transfer function of the analog multiplier [13] and the second reason is the difference in the magnitudes of the frequency comb generated with the circuit presented in [1]. During the digital signal processing, a phase and magnitude calibration of the different subbands is performed and the magnitude differences can be corrected.…”

Section: Transmittermentioning

confidence: 99%

“…The frequency comb is generated in the baseband and consists of a DC voltage and frequency components at 200 MHz and 400 MHz. The mathematical description of the baseband frequency comb in the transmitter is [1] x…”

Section: Considerations Regarding the Frequency Combmentioning

confidence: 99%

“…An earlier version of this paper was presented at the 18th European Radar Conference (EuRAD 2021) and was published in its proceedings [1].…”

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

System architecture for a compact high range resolution frequency comb OFDM radar

Quint

Nuß

Diewald

et al. 2023

Int. J. Microw. Wireless Technol.

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With increasing demands on resolution and flexibility in current and future radar applications, the focus is moving to digital radar systems such as orthogonal frequency-division multiplexing (OFDM) radars. To achieve high bandwidths and consequently a high range resolution, high sampling rates are needed. To overcome this constraint, an approach called frequency comb OFDM radar has been developed. This paper presents a novel, hardware efficient implementation of such a frequency comb OFDM radar including a novel way of comb generation. Special attention is put on the suppression of unwanted frequency components. Measurements which demonstrate the functionality of the hardware efficient radar system in combination with the frequency comb OFDM technique are presented.

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Section: Frequency Comb Generation In the Basebandmentioning

confidence: 99%

Section: Transmittermentioning

confidence: 99%

Section: Considerations Regarding the Frequency Combmentioning

confidence: 99%

“…An earlier version of this paper was presented at the 18th European Radar Conference (EuRAD 2021) and was published in its proceedings [1].…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

System architecture for a compact high range resolution frequency comb OFDM radar

Quint

Nuß

Diewald

et al. 2023

Int. J. Microw. Wireless Technol.

Self Cite

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“…An alternative method to generate the required frequency combs and to subsequently upconvert the narrowband OFDM signals is presented in [23].…”

Section: Frequency Comb Generationmentioning

confidence: 99%

Frequency comb MIMO OFDM radar demonstrator with high unambiguous velocity

Nuß

Oliveira

Zwick

2023

Int. J. Microw. Wireless Technol.

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Digital radar waveforms such as orthogonal frequency-division multiplexing (OFDM) often have the disadvantage that they require high sampling rates if fine range resolutions have to be achieved. The frequency comb OFDM radar scheme offers a possibility to overcome this drawback and to improve the range resolution without increasing the sampling rate. Simultaneously, the high unambiguous velocity, which is one of the advantages of digital radar waveforms, is retained and due to the simple generation of orthogonal transmit signals, it is well suited for multiple-input multiple-output (MIMO) applications. To prove all these features of the frequency comb OFDM radar scheme, a suitable 4 × 4 MIMO demonstrator including frequency comb generation as well as up- and downconversion with these combs has been set up. Its functionality has been validated with real measurements in an anechoic chamber in conjunction with a radar target simulator to emulate very high velocities.

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