Estimation of Sidelobe Level Variations of Phased Codes in Presence of Random Interference for Bistatic Wideband Noise Radar

We discuss the importance of using the sidelobe level of the cross-correlation function as a criterion to implement a noise radar based on the transmission of wideband binary waveforms. Theoretical expressions are introduced for the parameters Peak-Sidelobe, Secondary-Sidelobe, and Integrated-Sidelo...

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Bibliographic Details
Published inInternational journal of antennas and propagation Vol. 2015; no. 2015; pp. 1 - 11
Main Authors Vazquez Alejos, Ana, Mohammed, Habeeb Ur-Rahman, Dawood, Muhammad
Format Journal Article
LanguageEnglish
Published Cairo, Egypt Hindawi Publishing Corporation 01.01.2015
Hindawi Limited
Wiley
Subjects
Ambiguity
Bandwidths
Codes
Colleges & universities
Computer engineering
Doppler effect
Golay codes
Modulation
Noise
Product introduction
Radar
Radar systems
Receivers & amplifiers
Sidelobes
UHF
Waveforms
Wideband
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Summary:We discuss the importance of using the sidelobe level of the cross-correlation function as a criterion to implement a noise radar based on the transmission of wideband binary waveforms. Theoretical expressions are introduced for the parameters Peak-Sidelobe, Secondary-Sidelobe, and Integrated-Sidelobe levels for both Golay and pseudorandom binary sequences in presence of additive white Gaussian noise, relating the sequence length M to the spectral power N0 of the interfering noise. These expressions offer a valuable method for adaptive radar waveform design in order to determine sequence requirements which allow facing the noise present in the frequency band of interest. We also show a comparison of the ambiguity functions for Golay and PRBS sequences to analyze their performance in terms of Doppler and range accuracy. We describe a practical implementation of a pseudonoise waveform-based bistatic radar with reduced sidelobe level due to the use of Golay codes in combination with single side band modulation and operation at UHF band. Experimental measurements were performed in actual scenarios for ranging test of single and double targets. Linear polarizations were combined with different length sequences to determine their influence on the sounder performance under field test conditions.
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ISSN:1687-5869
1687-5877
DOI:10.1155/2015/297823