Phase-Coded Waveforms and Their Design

“…The polyphase code continuous wave signals have the characteristics of phase jump and the time frequency characteristic like the LFMCW signal [1]. The polyphase code signals (i.e.…”

Section: Introductionmentioning

confidence: 99%

Parameter Estimation of Polyphase Code Signals Based on Periodic FRFT

Zhu¹,

Jia²,

Wei³

et al. 2016

Proceedings of the 2016 International Conference on Artificial Intelligence and Engineering Applications

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Abstract. In order to improve the ability to intercepting polyphase code continuous wave signals for the radar reconnaissance receiver, a polyphase code continuous wave signals detection algorithm based on Periodic Fractional Fourier transform (Periodic FRFT, PFRFT) is proposed. In this paper, the PFRFT and its properties of linear frequency modulated continuous wave signals are studied. And the characteristics of linear frequency modulated continuous wave (LFMCW) signals of polyphase code continuous wave signals is analyzed. According to the similarity between the polyphase code continuous wave signals and the linear frequency modulated continuous wave signals, a polyphase code continuous wave signals detection algorithm based on PFRFT is proposed, also the realization process is given, and then the detection performance and parameter estimation performance are analyzed. Simulation results show that, compared with other existing algorithms, the proposed algorithm has better ability to detecting weak signal, and the minimum detectable signal to noise ratio (SNR) can be reduced by at least 6 dB, which is further reduced with the observation time extended.

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“…In designing a family of orthogonal spread spectrum waveform derived from digital chaotic circuits [1], recognition of the PAPR's impact on system implementation trades led to generalization of the Gaussian distributed "chaos waveform," to a phase coherent constant amplitude zero autocorrelation (CAZAC) waveform [2,3] and amplitude varying spreading sequence characteristics that retain the core benefits of random phase signals [4]. This paper presents an integrated model for a set of "percent Gaussian" waveforms, using an amplitude scaling parameter Ȗ that ranges from 0% (constant amplitude) to 100% (Gaussian distributed amplitude).…”

Section: Introductionmentioning

confidence: 99%

Performance of Percent Gaussian Orthogonal Signaling Waveforms

Michaels¹,

Lau

2014

2014 IEEE Military Communications Conference

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Recent developments of secure digital chaotic spread spectrum communication systems have been based on the generalized ideals of maximum channel capacity and maximal entropy/security, which result in a Gaussian-distributed noiselike signal that is indistinguishable from naturally occurring (bandlimited) thermal noise. An implementation challenge associated with these waveforms is that the signal peak-toaverage power ratio (PAPR) is approximately that of an i.i.d Gaussian distributed random sequence; with infinite tails in the Gaussian distribution, modeled practically by a Gaussian distribution truncated to ±4.8ı, the peak excursions of the output can be 13-15 dB over that of the average signal power. To address this PAPR constraint, a series of "percent Gaussian" orthogonal signaling waveforms were developed, allowing parameterized waveform selection that compactly trade PAPR improvements with cyclostationary feature content; these waveforms are bounded by the Gaussian distributed digital chaos signal and a constant amplitude zero autocorrelation (CAZAC) signal, all of which deliver security advantages over traditional direct sequence spread spectrum (DSSS) waveforms. This paper presents an underlying model for these "percent Gaussian" waveforms, derives a generalized set of symbol error rate metrics. Discussion of the performance bounds is also presented.

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Phase-Coded Waveforms and Their Design

Cited by 101 publications

References 46 publications

On integer-valued zero autocorrelation sequences

On integer-valued zero autocorrelation sequences

Parameter Estimation of Polyphase Code Signals Based on Periodic FRFT

Performance of Percent Gaussian Orthogonal Signaling Waveforms

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