Performance comparison of dual-function systems embedding phase-modulated signals in FH radar

Indu Priya Eedara; Moeness G. Amin

doi:10.1117/12.2558264

19 May 2020 Performance comparison of dual-function systems embedding phase-modulated signals in FH radar

Indu Priya Eedara, Moeness G. Amin

Proceedings Volume 11423, Signal Processing, Sensor/Information Fusion, and Target Recognition XXIX; 114230U (2020) https://doi.org/10.1117/12.2558264
Event: SPIE Defense + Commercial Sensing, 2020, Online Only

Abstract

In this paper, we compare the performance of diﬀerent phase modulated frequency hopping (FH) multiple-input multiple-output (MIMO) radar waveforms. The communication symbols are embedded into the FH waveforms under the auspices of dual-function (DF) radar and communications system. In the proposed scheme, each embedded symbol is represented by a sequence of phases. The phase modulated sequence is embedded through multiplication with the radar hops and is transmitted through a MIMO radar platform. Using this scheme, we consider information embedding in MIMO FH radar implementing diﬀerent types of phase modulated sequence, including phase shift keying (PSK), diﬀerential phase shift keying (DPSK) and continuous phase modulation (CPM). We analyze the corresponding ambiguity functions (AFs) in terms of reducing or increasing range and Doppler sidelobes compared to the FH radar without any signal embedding. The spectral sidelobe levels and the complexity of the demodulator at the communication receiver are also examined. It is shown the proposed embedding scheme for DPSK and CPM minimizes the frequency leakage outside the radar signal bandwidth. To demonstrate the effectiveness of proposed scheme, we compare its performance with existing embedding schemes, all for FH radars. It is shown that our approach, in its significant reductions of range sidelobes, permits high data rate transmission. This is made possible because the FH radar can now afford using duplicate hopping code values without the penalty of incurring high correlations, or range sidelobe levels.

Conference Presentation

Citation Download Citation

Indu Priya Eedara and Moeness G. Amin "Performance comparison of dual-function systems embedding phase-modulated signals in FH radar", Proc. SPIE 11423, Signal Processing, Sensor/Information Fusion, and Target Recognition XXIX, 114230U (19 May 2020); https://doi.org/10.1117/12.2558264

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