Pulse Compression Analysis for OFDM-Based Radar-Radio Systems

Tian, Xuanxuan; Zhang, Tingting; Zhang, Qinyu; Xu, Huining; Song, Zhaohui

doi:10.1007/978-3-319-73447-7_42

Cited by 2 publications

(3 citation statements)

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“…Improvement of frequency analysis using the advantages of high-speed computational algorithms is given in [16]. Ways to improve the quality of frequency measurements were considered in [17,18], but the issues of statistical analysis of the possibility of taking into account fluctuations in the signal phase structure under the above conditions require further research.…”

Section: Literature Review and Problem Statementmentioning

confidence: 99%

“…Therefore, the analysis is performed for coherent packets of (8…16) radar pulses, which are widely used in radar practice. According to [1,17,21], the influence of the above factors of phase fluctuations distorts the correlation interval of these fluctuations τ=(0.1…1) s. The variance of phase fluctuations for estimating their impact is chosen within ( ) 2 0.01 10 ϕ σ = … rad 2 depending on the radar range. The estimation should be performed for the resolution coefficient K r =10lg(q 2 /2) of 17-27 db.…”

Section: Estimation Of the Values Of Statistical Characteristics Of Phase Fluctuations Of Radio Pulses Of The Received Packet To Be Consimentioning

confidence: 99%

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Development of an optimization method for measuring the Doppler frequency of a packet taking into account the fluctuations of the initial phases of its radio pulses

Yevseiev

Kuznietsov

Herasimov

et al. 2021

EEJET

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The necessity of estimating the decrease in the accuracy of measuring the informative parameters of a radar signal in real conditions of its propagation and reflection has been substantiated. The results of the estimation determine the requirements for optimizing this measurement to achieve the required efficiency. A numerical analysis of the decrease in the accuracy of measuring the Doppler frequency of a coherent packet is presented, depending on the statistical characteristics of fluctuations of the initial phases of its radio pulses. Expressions are given for calculating the fluctuation component of the measurement error of radio pulse packet frequency for various coefficients of interpulse correlation of phase fluctuations. An assessment is made of the possibility of increasing the accuracy of Doppler frequency measurement, which can be ensured by statistical optimization of the algorithm for time-frequency processing of a given radar signal by taking into account its phase fluctuations. The conditions for the multiplicative influence of phase fluctuations of radio pulses of the received packet are substantiated, which determine the efficiency of optimization of Doppler frequency measurement. Based on the results of the study, an optimization method for measuring the Doppler frequency of the packet taking into account fluctuations in the initial phases of its radio pulses is proposed. The accuracy of Doppler frequency measurement under the influence of both the internal noise of the radar receiver and the correlated phase fluctuations of its radio pulses is estimated. The efficiency of optimization of measuring the Doppler frequency of the packet is estimated taking into account fluctuations of the initial phases of its radio pulses by means of computer simulation. It is proved that, under the influence of phase fluctuations, the accuracy of Doppler frequency measurement can be increased due to the performed optimization from 1.86 to 6.29 times. This opens the way to improving the existing algorithms for measuring the higher time range derivatives to improve the quality of tracking complex maneuvering aerodynamic objects. This explains the importance and usefulness of the work for the radar theory.

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Section: Literature Review and Problem Statementmentioning

confidence: 99%

Section: Estimation Of the Values Of Statistical Characteristics Of Phase Fluctuations Of Radio Pulses Of The Received Packet To Be Consimentioning

confidence: 99%

Development of an optimization method for measuring the Doppler frequency of a packet taking into account the fluctuations of the initial phases of its radio pulses

Yevseiev

Kuznietsov

Herasimov

et al. 2021

EEJET

View full text Add to dashboard Cite

show abstract

“…The flexibility with which OFDM sub‐carrier coefficients can be selected affords adjustments of the resultant signal's characteristics, e.g. in [21, 22] the authors propose to form a monopulse‐type signal with multiple OFDM symbols, and apply phase coding to OFDM, respectively, to achieve higher data rates, while also addressing high‐resolution ranging and target velocity determination. Using OFDM will also allow for some measure of LPI/LPD in the form of sub‐carrier nulling where jamming/interference occurs [23]; it allows for optimised power allocation among the sub‐carriers to reduce the overall emission levels [24]; and it will provide additional security via sub‐carrier coefficient randomisation [25].…”

Section: Introductionmentioning

confidence: 99%