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In this paper, direction of arrival (DOA) estimation using sum co-array of coprime arrays is studied. The array geometry can be represented as the kronecker product of those of two coprime arrays. This array structure can reduce the aperture loss when extracting the subarrays, which are jointly used to achieve high resolution and unique DOA estimation via low computational propagator method. Compare...
Time delay estimation in multipath environments is important for many applications in the fields of radar, sonar, communication and so on. In this paper, we propose a method based on compressed sensing for time delay estimation. In the proposed method, the signal in time domain is first converted into frequency domain, which tends to convert the problem to a parameter estimation of sinusoidal signals...
This paper presents a novel method for joint frequency and angle estimation of incoming signals. Two-layers compressed sensing method is used to obtain direction wave number and frequency parameters respectively. The algorithm provides high resolution and accuracy in both frequency and direction of arrival (DOA) estimation over the frequency range under the condition of small signal to noise ratio...
Digital radio frequency memory (DRFM) jamming is difficult to eliminate if it enters a radar system from the main lobe. A novel processing scheme for radar using linear frequency modulation waveform is proposed to accomplish target detection in asynchronous false target scenarios in accordance with the incoherent characteristic of the jamming signals. The technique of fractional Fourier transformation...
The issue of direction of departure (DOD) and direction of arrival (DOA) estimation for bistatic coprime multiple-input multiple-output (MIMO) radar is discussed, and an algorithm based on combined estimation of signal parameters via rotational invariance technique (ESPRIT) is proposed. The transmitter and receiver both adopt coprime arrays with large inter-element spacing, which can avoid mutual...
A measurement matrix plays an important role in the compressed sensing theory for sparse spatial spectral estimation. However, the RIP theory cannot provide a best measurement matrix for all the applications. In general, different measurement matrices have different characteristics to suit for different applications. Thus, this paper mainly researches on six common measurement matrices. Different...
The issue of direction of arrival (DOA) estimation for co-prime array is studied, and an method based on combined estimation of signal parameters via rotational invariance technique (ESPRIT) is proposed. ESPRIT is employed to obtain an ambiguous estimation, which then can be used to recover all the other estimations. Then the DOA estimation can be uniquely determined by finding the coincide estimations...
The design of integrated waveform that can simultaneously perform radar and communication function is a key technology in radar and communication integration. This paper proposes a novel integrated radar and communication waveform based on linear frequency modulated (LFM) signal, which performs radar function. Communication data of different channels as well as adjusting data are multiplied with corresponding...
For guaranteeing quasi-error free delivery of realtime multicast services over wireless networks, an efficient greedy algorithm is proposed for optimizing the parameters of a HARQ scheme with rateless codes under strict delay and bandwidth constraints. We take systematic Raptor codes as an example for analyzing the optimum performance of the HARQ scheme. The results show that the optimum performance...
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