Orthogonal Frequency Diversity Waveform with Range-Doppler Optimization for MIMO Radar

Gao, Caicai; Teh, Kah Chan; Liu, Aifei

doi:10.1109/lsp.2014.2329944

Cited by 30 publications

(15 citation statements)

References 12 publications

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“…The nulls of the first term depend on the parameter ߙ in (6). In order to nullify the grating lobes, the positions of the nulls should be coincided with them.…”

Section: A Autocorrelation Functionmentioning

confidence: 99%

“…The frequency sequences are optimized by the simulated annealing algorithm and the genetic algorithm in [4] and [5], respectively. A modified DFCW waveform with LFM signal (MDFCW-LFM) was proposed in [6] by changing the contiguous sub-pulses to an inconsecutive pulse train to eliminate the effect between the neighboring sub-pulses. It has been shown in [6] that both the ASP and the cross-correlation peak (CP) are reduced to below -30 dB.…”

Section: Introductionmentioning

confidence: 99%

“…A modified DFCW waveform with LFM signal (MDFCW-LFM) was proposed in [6] by changing the contiguous sub-pulses to an inconsecutive pulse train to eliminate the effect between the neighboring sub-pulses. It has been shown in [6] that both the ASP and the cross-correlation peak (CP) are reduced to below -30 dB. An OFDM chirp waveform with random matrix modulation for the MIMO SAR was proposed in [7].…”

Section: Introductionmentioning

confidence: 99%

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Frequency diversity waveform with NLFM signals

Gao

Teh

Liu

2015

2015 10th International Conference on Information, Communications and Signal Processing (ICICS)

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In this paper, we propose a frequency coding waveform with a nonlinear frequency modulation (NLFM) signal for the multiple-input multiple-output (MIMO) radar. The transmitted signal of each transmitting antenna is a pulse train, of which, the sub-pulses are NLFM signals with different carrier frequencies. The frequency sequence and the parameter of the nonlinear frequency function are optimized to reduce the autocorrelation sidelobe and cross-correlation peaks. Compared to the existing frequency coding waveforms, the autocorrelation sidelobes and the cross-correlation level of the proposed waveform are improved significantly. In addition, with this new waveform, the ambiguity functions with sharp shape are achieved and the cross ambiguity functions have good Doppler tolerance.

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“…The nulls of the first term depend on the parameter ߙ in (6). In order to nullify the grating lobes, the positions of the nulls should be coincided with them.…”

Section: A Autocorrelation Functionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Frequency diversity waveform with NLFM signals

Gao

Teh

Liu

2015

2015 10th International Conference on Information, Communications and Signal Processing (ICICS)

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“…To address the current needs, many advanced array design ideas have appeared in the literature. They include time modulated array (TMA) [9], frequency diverse array (FDA) [10], frequency diversity based multiple-input multiple-output (MIMO) [11]- [13], and waveform diversity array (WDA) [14]- [16]. By connecting and disconnecting the elements from the feed network, TMA can create a beampattern with low sidelobes.…”

Section: Introductionmentioning

confidence: 99%

An Overview on Time/Frequency Modulated Array Processing

Wang

Farina³

2017

IEEE J. Sel. Top. Signal Process.

197

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Time and frequency modulated arrays have numerous application areas including radar, navigation and communications. Specifically, a time modulated array can create a beampattern with low sidelobes via connecting and disconnecting the antenna elements from the feed network, while the frequency modulated frequency diverse array produces a range-dependent pattern. In this paper, we aim to introduce these advanced arrays to the signal processing community so that more investigations in terms of theory, methods and applications, can be facilitated. The research progress of time/frequency modulated array studies is reviewed and the most recent advances are discussed. Moreover, potential applications in radar and communications are presented, along with their technical challenges, especially in signal processing aspects.Index Terms-Time modulated array, frequency modulated array, frequency diverse array, array signal processing, phasedarray, range-dependent beamforming, multiple-input multipleoutput (MIMO) radar.

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“…Replacing the constant frequency with linear frequency modulation in the DFCW is also extensive investigated [16][17][18]. However, the basis of the above mentioned orthogonal coding waveforms [11][12][13][14][15][16][17][18] depends on frequency diversity advantage, which can only provide limited orthogonality in frequency domain.…”

Section: Introductionmentioning

confidence: 99%