4 Contributo in Atti di Convegno (Proceeding)

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Multi-Frequency Radar Sounder Design and RFSoC Implementation for Lunar Subsurface Exploration

Future lunar exploration requires advanced multi-frequency radar sounders capable of mapping geological structures and detecting volatiles. This paper presents the design of a compact, fully-digital radar sounder and the implementation of its demonstrator on the Xilinx ZCU111 Radio Frequency System-on-Chip (RFSoC) platform. Exploiting the device's Direct RF capabilities, we propose a parallelized, multiplier-free digital waveform generation architecture capable of synthesizing coherent Linear...

Radar Frequency-Comparison Monopulse Validation Using FPGA-Generated Wideband Chirp Waveforms

In this paper, we introduce a frequency-based Direction of Arrival (DoA) estimation technique for wideband radar systems employing Linear Frequency Modulated (LFM) signals. Conventional phase-comparison monopulse is subject to estimation ambiguities, especially in the case of a large baseline distance. In contrast, the proposed frequency-comparison monopulse leverages the time-to-frequency mapping property of LFM signals, enabling unambiguous DoA estimation for any antenna spacing. By leverag...

Experimental Validation of Low-PAPR OFDM Waveforms for JRC Using Pilot-Aided Golay Sequences

This study investigates the use of pilot-aided Golay sequences to reduce the Peak-to-Average Power Ratio (PAPR) in Orthogonal Frequency Division Multiplexing (OFDM) waveforms for joint radar and communication (JRC) systems. OFDM, widely adopted in radar and communication applications, suffers from high PAPR, which limits radar performance, especially for detecting low Radar Cross Section (RCS) targets. While Golay sequences offer a maximum PAPR of 3 dB, integrating pilot tones-essential f or ...

Preliminary Experimental Results for a Multi-channel Forward Scatter Radar

This paper reports preliminary experimental tests for a multi-channel Forward Scatter Radar (FSR), namely a FSR system equipped with multiple receiving channels connected to closely spaced antennas. While the majority of the technical literature on FSR focuses on single-channel FSR and exploits signal processing schemes operating in time domain, multichannel FSR has been recently shown to allow target detection and direction of arrival (DoA) estimation by exploiting the signal amplitude modul...

Experimental validation of supervised DPCA reciprocal filter in OFDM radar on moving platforms

In this paper, we present the experimental validation of a supervised reciprocal filter-enabled Displaced Phase Center Antenna (DPCA) technique for OFDM radar systems onboard moving platforms. Our setup features a two-channel receiving array installed on a vehicle and employs an onboard OFDM transmitter as a radar illuminator. The experiments were conducted in a parking area, capturing the radar echoes from stationary and moving scatterers to assess the target detection and clutter cancellati...

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