A Sub-Nyquist Radar Prototype: Hardware and Software
نویسندگان
چکیده
We introduce a full hardware implementation and demo of a sub-Nyquist radar receiver. Our system demonstrates pulse-Doppler radar transmission and reception at sub-Nyquist rates. Specifically, we sample the received radar signal at 1/20 the Nyquist rate, while still perfectly detecting the targets in the delayDoppler plane. In addition our system filters clutter interference from the sub-Nyquist samples by implementing a clutter rejection algorithm, with all the processing done at the low rate. In this prototype system, we use the Xampling framework in order to reduce the sampling rate at the ADC. After sampling, the entire signal, recovery process and clutter filtering are performed on the low rate samples without having to return to the Nyquist rate. With our hardware and algorithm we are able to obtain good detection performance even in low SNR. To our best knowledge this is the first sub-Nyquist radar system illustrating delay-Doppler detection implemented in hardware. .
منابع مشابه
A Sub-Nyquist Radar Prototype: Hardware and Algorithms
Traditional radar sensing typically involves matched filtering between the received signal and the shape of the transmitted pulse. Under the confinement of classic sampling theorem this requires that the received signals must first be sampled at twice the baseband bandwidth, in order to avoid aliasing. The growing demands for target distinction capability and spatial resolution imply significan...
متن کاملSub-Nyquist Radar: Principles and Prototypes
In the past few years, new approaches to radar signal processing have been introduced which allow the radar to perform signal detection and parameter estimation from much fewer measurements than that required by Nyquist sampling. These systems referred to as sub-Nyquist radars model the received signal as having finite rate of innovation and employ the Xampling framework to obtain low-rate samp...
متن کاملSUMMeR: Sub-Nyquist MIMO Radar
Multiple input multiple output (MIMO) radar exhibits several advantages with respect to traditional radar array systems in terms of flexibility and performance. However, MIMO radar poses new challenges for both hardware design and digital processing. In particular, achieving high azimuth resolution requires a large number of transmit and receive antennas. In addition, the digital processing is ...
متن کاملNyquist Folding Receiver for the Interception of Frequency Agile Radar Signal
This work was carried out to improve the probability of interception of frequency sweep and lower the system complexity of non-sweep mode of the electronic intelligence system for frequency agile radar signal. A low complexity receiver structure and its associated demodulation algorithm with high probability of intercept are also presented. Moreover, the applicability of this structure for the ...
متن کاملA Survey on Sub-Nyquist Sampling
This paper gives a survey of sub-Nyquist sampling. Sub-Nyquist sampking is of great interest in the environment that sampling by Nyquist rate is infeasible due to either hardware or software limitation. The survey summarizes a number of recent important researches on sub-Nyquist sampling (compressive sensing). In addition to the basics of sub-Nyquist sampleing, including the fundamental theory ...
متن کامل