Potential applications of noise radar technology and related waveform diversity

Galati, Gaspare; Pavan, Gabriele; Palo, Francesco De; Stove, A.G.

doi:10.1109/irs.2016.7497329

Cited by 13 publications

(11 citation statements)

References 15 publications

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“…In fact, using NRT the interfered radar perceives and treats the interference as a kind of noise [ 5 , 6 ]. This feature will be more and more important in the developments of marine radars, due to their use of solid-state transmitters, having much greater “duty cycle” (longer pulses) than the legacy magnetron [ 7 ], as well as in automotive applications, [ 8 ] because of the more and increasing number of used automotive radars, causing a high spatial density of these particular radar sets.…”

Section: Introductionmentioning

confidence: 99%

Introduction to Noise Radar and Its Waveforms

Palo¹,

Galati

Pavan

et al. 2020

Sensors

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In the system-level design for both conventional radars and noise radars, a fundamental element is the use of waveforms suited to the particular application. In the military arena, low probability of intercept (LPI) and of exploitation (LPE) by the enemy are required, while in the civil context, the spectrum occupancy is a more and more important requirement, because of the growing request by non-radar applications; hence, a plurality of nearby radars may be obliged to transmit in the same band. All these requirements are satisfied by noise radar technology. After an overview of the main noise radar features and design problems, this paper summarizes recent developments in “tailoring” pseudo-random sequences plus a novel tailoring method aiming for an increase of detection performance whilst enabling to produce a (virtually) unlimited number of noise-like waveforms usable in different applications.

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Section: Introductionmentioning

confidence: 99%

Introduction to Noise Radar and Its Waveforms

Palo¹,

Galati

Pavan

et al. 2020

Sensors

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“…Noise radar technology (NRT) [15,[31][32][33][34][35] makes use of pseudo-random waveforms that are realizations of a Gaussian band-limited random process or transformations of it. These "pure noise" realizations, once generated and stored, are not strictly random anymore as they act as deterministic signals with known PSLR, Range resolution and ambiguity function.…”

Section: Random Waveforms: Noise Radar Technologymentioning

confidence: 99%

Waveform Design and Related Processing for Multiple Target Detection and Resolution

Galati¹,

Pavan²

2018

Topics in Radar Signal Processing

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The performance of modern radar systems mostly depends on the radiated waveforms, whose design is the basis of the entire system design. Today's coherent, solidstate radars (either of the phased array type or of the single-radiator type as air traffic control or marine radars) transmit a set of deterministic signals with relatively large duty cycles, an order of 10%, calling for pulse compression to get the required range resolution. Often, power budget calls for different pulse lengths (e.g., short, medium, and long waveforms with a rectangular envelope) to cover the whole radar range. The first part of the chapter includes the topic of mitigating the effect of unwanted side lobes, inherent to every pulse compression, which is achieved both by a careful and optimal design of the waveform and by a (possibly mismatched) suitable processing. The second part of the chapter deals with the novel noise radar technology, not yet used in commercial radar sets but promising: (1) to prevent radar interception and exploitation by an enemy part and (2) to limit the mutual interferences of nearby radars, as in the marine environment. In this case, the design includes a tailoring of a set of pseudo-random waveforms, generally by recursive processing, to comply with the system requirements.

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“…Noise Radar Technology (NRT) [29][30][31][32][33][34][35] may be a valid alternative to overcome the high-power amplitude modulation issue. NRT makes use of pseudo-random waveforms that are realizations of a Gaussian band-limited random process [24].…”

Section: Noise Radar Technologymentioning

confidence: 99%

Chirp Signals and Noisy Waveforms for Solid-State Surveillance Radars

2017

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Since the advent of "pulse compression" radar, the "chirp" signal (Linear Frequency Modulation, LFM) has been one of the most widely used radar waveforms. It is well known that, by changing its modulation into a Non-Linear Frequency Modulation (NLFM), better performance in terms of Peak-to-Sidelobes Ratio (PSLR) can be achieved to mitigate the masking effect of nearby targets and to increase the useful dynamic range. Adding an appropriate amplitude modulation, as occurs in Hybrid-NLFM (HNLFM), the PSLR can reach very low values (e.g., PSLR < −60 dB), comparable to the two-way antenna sidelobes in azimuth. On the other hand, modern solid-state power amplifier technology, using low-power modules, requires them to be combined at the Radio Frequency (RF) stage in order to achieve the desired transmitted power. Noise Radar Technology (NRT) represents a valid alternative to deterministic waveforms. It makes use of pseudo-random waveforms-realizations of a noise process. The higher its time-bandwidth (or BT) product, the higher the (statistical) PSLR. With practical BT values, the achievable PSLR using pure random noise is generally not sufficient. Therefore, the generated pseudorandom waveforms can be "tailored" (TPW: Tailored Pseudorandom Waveforms) at will through suitable algorithms in order to achieve the desired sidelobe level, even only in a limited range interval, as shown in this work. Moreover, the needed high BT, i.e., the higher time duration T having fixed the bandwidth B, matches well with the low power solid-state amplifiers of Noise Radar. Focusing the interest on (civil) surveillance radar applications, such as ATC (Air Traffic Control) and marine radar, this paper proposes a general review of the two classes of waveforms, i.e., HNLFM and TPW.

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Potential applications of noise radar technology and related waveform diversity

Cited by 13 publications

References 15 publications

Introduction to Noise Radar and Its Waveforms

Introduction to Noise Radar and Its Waveforms

Waveform Design and Related Processing for Multiple Target Detection and Resolution

Chirp Signals and Noisy Waveforms for Solid-State Surveillance Radars

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