Radar communications via random sequence encoding

Kellett, Daniel; Garmatyuk, Dmitriy; Morton, Yu; Mudaliar, Saba

doi:10.23919/irs.2017.8008137

Cited by 10 publications

(3 citation statements)

References 7 publications

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“…Following the principle of spread spectrum techniques, some researchers intended to facilitate the separation of multiple uses for joint system using complete complementary code family [149]. Finally, encoding the data of radar and communication onto a parameter of a particular random distribution for embedding the data in one single waveform was investigated in OFDM pulses [150].…”

Section: Co-designmentioning

confidence: 99%

Joint radar and communication: A survey

et al. 2020

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Joint radar and communication (JRC) technology has become important for civil and military applications for decades. This paper introduces the concepts, characteristics and advantages of JRC technology, presenting the typical applications that have benefited from JRC technology currently and in the future. This paper explores the state-of-the-art of JRC in the levels of coexistence, cooperation, co-design and collaboration. Compared to previous surveys, this paper reviews the entire trends that drive the development of radar sensing and wireless communication using JRC. Specifically, we explore an open research issue on radar and communication operating with mutual benefits based on collaboration, which represents the fourth stage of JRC evolution. This paper provides useful perspectives for future researches of JRC technology.

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Section: Co-designmentioning

confidence: 99%

Joint radar and communication: A survey

et al. 2020

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“…Hence, interference mitigation techniques such as those proposed in [20] are required for effective spectrum sharing between radar and communication systems. Garmatyuk et al proposed the use of random sequence encoding where a single waveform is utilized for both the radar and communication [21]. The performance of these waveforms from the perspectives of both low probability of intercept (LPI) and low probability of detection (LPD) is discussed in [22].…”

Section: Introductionmentioning

confidence: 99%

Simultaneous Radar-Communication Systems Using Controlled Chaos-Based Frequency Modulated Waveforms

2020

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With the increase in demand for spectral resources and bandwidth constraints, efficient solutions for the coexistence of radar and communication systems are needed. Simultaneously, the development of multifunctional radio frequency (RF) systems with less hardware have received considerable attention. Most previous work on coexistence has focused on hardware design and mitigation of interference between radar and communication systems. This work proposes, a novel method for controlling a chaotic trajectory, which allows for the coexistence of both radar and communication systems. Binary information can be encoded in a chaotic state by adjusting its trajectory. In this approach, a state variable is selected to control the trajectory and generate a controlled chaos-based frequency modulated (CCBFM) waveform for joint radar-communication system signal transmission. We also design a communication receiver to decode the information and a radar receiver that extracts the signature of the target are designed accordingly. The performance of the controlled chaotic communication system is assessed in terms of the bit error ratio (BER). The analysis of the communication system shows that the CCBFM receiver performs reasonably well compared to a half-sine pulse frequency modulated (HSPFM) receiver. Analysis of the radar system performance is assessed using the entropy of the target's signature. The use of a CCBFM waveform leads to accurate target detection and classification for a signal-to-noise ratio as low as −30 dB. These analyses demonstrate that a CCBFM waveform can be successfully used for joint radar-communication systems in a shared spectrum. INDEX TERMS Controlled chaos, chaotic systems, joint radar-communication systems, Lorenz oscillator, radar imaging. Research (ONR) launched an Advanced Multifunction RF Systems (AMRFS) program [3] to develop a single system that performs multiple operations such as sensing, communication, electronic warfare, etc. Numerous studies have been dedicated to integrating radar and communication subsystems into a single system [4]-[8]. In spite of advances, the challenge of designing a singlewaveform transmission approach for joint radar and communication (RadCom) system remains [9]. The use of a single waveform for both radar sensing and communication data transmission is desirable to avoid multiple expensive RF transmitters [4]. A dual-function system that adopts this fixed signal approach would, of course, require a trade-off between its radar and communication performance [10]. For instance,

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“…We choose amplitude coefficients of OFDM signal's sub‐carriers as components that carry the random process samples to generate such radar‐communication signals. This method – first introduced in [29], then enhanced, analysed in detail and tested experimentally for this work – can provide electronic counter‐countermeasure (ECCM) functionality in terms of data interceptor penalisation even under a ‘worst‐case scenario’ described in the paper below. The resultant waveforms are inherently random and vary on a pulse‐to‐pulse basis, even when the same data are re‐transmitted several times.…”

Section: Introductionmentioning

confidence: 99%