Mixed targets localization using symmetric nested frequency diverse array radar

Chen, Hui; Wang, Wen-Qin; Wang, Wei

doi:10.1049/sil2.12009

Cited by 2 publications

(3 citation statements)

References 45 publications

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“…Specifically, FDA can provide potential superiority in precise target location [ 5 , 6 ], and range-dependent anti-jamming [ 7 , 8 ] over conventional PA which can only perform the beamforming in an angle dimension [ 9 ]. At present, enormous investigations have been conducted on the potential applications of FDA [ 10 , 11 , 12 , 13 , 14 , 15 , 16 , 17 , 18 , 19 , 20 , 21 ]. In particular, the concept of FDA was introduced into the millimeter wave imaging systems to reduce the sampling rates in [ 10 ].…”

Section: Introductionmentioning

confidence: 99%

“…In [ 15 ], FDA was utilized in ambient backscatter communication to enhance the channel capacity and detection performance. A mixed near-field and far-field target localization method was presented in [ 16 ], which can obtain both direction-of-arrival (DOA) and range information of the targets by utilizing symmetric nested FDA. A dual-mode array radar scheme, namely PA and FDA cooperated radar, was developed in [ 17 ] to provide unambiguous range and angle estimation, which is of significant importance in wide region surveillance.…”

Section: Introductionmentioning

confidence: 99%

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Transmit–Receive Sparse Synthesis of Linear Frequency Diverse Array in Range-Angle Space Using Genetic Algorithm

Huang

Wang

2023

Sensors

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Unlike conventional phased array (PA), frequency diversity array (FDA) can perform the beampattern synthesis not only in an angle dimension but also in a range dimension by introducing an additional frequency offset (FO) across the array aperture, thus greatly enhancing the beamforming flexibility of an array antenna. Nevertheless, an FDA with uniform inter-element spacing that consists of a huge number of elements is required when a high resolution is needed, which results in a high cost. To substantially reduce the cost while almost maintaining the antenna resolution, it is important to conduct a sparse synthesis of FDA. Under these circumstances, this paper investigated the transmit–receive beamforming of a sparse-fda in range and angle dimensions. In particular, the joint transmit–receive signal formula was first derived and analyzed to resolve the inherent time-varying characteristics of FDA based on a cost-effective signal processing diagram. In the sequel, the GA-based low sidelobe level (SLL) transmit–receive beamforming of the sparse-fda was proposed to generate a focused main lobe in a range-angle space, where the array element positions were incorporated into the optimization problem. Numerical results showed that 50% of the elements can be saved for the two linear FDAs with sinusoidally and logarithmically varying frequency offsets, respectively termed as sin-FO linear-FDA and log-FO linear-FDA, with only a less than 1 dB increment in SLL. The resultant SLLs are below −9.6 dB, and −12.9 dB for these two linear FDAs, respectively.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Transmit–Receive Sparse Synthesis of Linear Frequency Diverse Array in Range-Angle Space Using Genetic Algorithm

Huang

Wang

2023

Sensors

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“…advantages of phased array and its own characteristics [11,12]. Its beam pattern is doubly dependent and coupled in angle and distance, and the degree of freedom of transmitting beam energy gathering in space is improved.…”

mentioning

confidence: 99%

Integrated Waveform of Frequency Diversity Array Radar Communication Based on Ofdm Random Frequency Offset Modulation

Liao¹,

Zhang²,

Wang³

et al. 2022

PIER M

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The integration of radar and communication has always been one of the cross-research hotspots in the field of radar and communication. In order to solve the problems of integration signal separation and angle-distance coupling, this paper proposes a radar and communication integrated waveform based on random Orthogonal Frequency Division Multiplexing (OFDM) frequency offset modulation for Frequency Diversity Array (FDA). This waveform directly loads OFDM symbols to the elements of FDA, and each element carries a complete OFDM symbol with different information. Random frequency offsets are added between the elements to separate different signals of different elements, which can solve the problem of signal separation and form decoupled radar beam. After transmitting and receiving a series of the waveform, the transmission of communication data and the positioning of radar targets can be completed at the same time. The simulation results show that the waveform not only solves the problem of separating and uncoupling the integrated signal, but also improves the frequency band utilization rate and information transmission rate of the radar communication integrated system. INTRODUCTIONWith the rapid development of science and technology and the increasing complexity of the electromagnetic environment, the modern combat platform has increasing requirements for the performance of the radar system. In some applications (such as bistatic and distributed radars), if some parameters of the radar (such as motion information) can be effectively transmitted to the receiver, it will be beneficial for improving the performance of the radar system, which will lead to the development of integrated radar-communication research.Radar system and communication system are strictly distinguished because of their obvious differences in some aspects [1], but they also have similarities in many aspects and have the conditions to synthesize an integrated system. Refs. [2-5] analyzed, in detail, the feasibility of radar communication integration from theoretical principles and other aspects. At present, radar communication integration technology is mostly based on linear frequency modulation (LFM) signal and Orthogonal Frequency Division Multiplexing (OFDM), and completes the design of integrated signal model through modulation [6][7][8][9]. Therefore, radar waveform and communication waveform are generated independently and orthogonal, which also leads to the reduction of detection ability and low communication rate. At present, phased array with the advantage of high gain can not only improve the communication rate, but also realize the radar system and communication system to share the transceiver channel. As a special phased array, the frequency-controlled array (FDA) [10] has both the

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Mixed targets localization using symmetric nested frequency diverse array radar

Cited by 2 publications

References 45 publications

Transmit–Receive Sparse Synthesis of Linear Frequency Diverse Array in Range-Angle Space Using Genetic Algorithm

Transmit–Receive Sparse Synthesis of Linear Frequency Diverse Array in Range-Angle Space Using Genetic Algorithm

Integrated Waveform of Frequency Diversity Array Radar Communication Based on Ofdm Random Frequency Offset Modulation

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