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Method for calculating Cramer-Rao bound of coherent passive MIMO radar

A calculation method and radar technology, applied in the field of radar, can solve the problem of difficult realization of transmitted signal information

Active Publication Date: 2021-09-07
UNIV OF ELECTRONICS SCI & TECH OF CHINA
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Problems solved by technology

However, in some cases, it is impossible to separate the target path and direct path signals, which makes it difficult to directly use the direct signal to obtain the transmitted signal information

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  • Method for calculating Cramer-Rao bound of coherent passive MIMO radar
  • Method for calculating Cramer-Rao bound of coherent passive MIMO radar
  • Method for calculating Cramer-Rao bound of coherent passive MIMO radar

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Embodiment Construction

[0061] For convenience of description, firstly defined as follows:

[0062] () T Transpose, () H It is a conjugate transpose, Denotes mathematical expectation, diag {·} denotes a diagonal matrix, Diag {·} denotes a block diagonal matrix configuration, I K×K K represents the dimension of the matrix, det (·) is the determinant of Matrix, Denotes taking the real part of a complex number, Indicates Crogenk.

[0063] Consider a MIMO passive coherent radar, the transmitter has M antennas and a single N single antenna receiver, in a Cartesian coordinate system, the m (m = 1, ..., M) and a transmitting station n (n = position 1, ..., N) respectively receiving station with M th transmitter kT s The sample value at the moment is s m [K] is the m-th transmit antennas transmit signals, T s Sampling interval, when the orthogonal (k = 1, ..., K) is the sample number, K is the total number of samples is assumed that transmitters transmit signals of different k. E m To transmit a signal ene...

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Abstract

The invention discloses a method for calculating the Cramer-Rao bound of a coherent passive MIMO radar, and belongs to the technical field of radars. The Cramer-Rao bound calculated through adoption of the method can be used for evaluating the joint estimation performance of the speed and position parameters of the coherent passive MIMO radar target, the parameter estimation performance under the conditions that signals are unknown and the signals have constant modulus constraints under the influence of direct wave signals is considered, and then the working process of coherent passive MIMO radar parameter estimation is closer to reality. In the process, the availability of direct waves for parameter estimation and the unknown property of signals are considered.

Description

Technical field [0001] The present invention belongs to the field of radar technology, and it is particularly related to the calculation of the parameter estimation performance evaluation index of the radar signal processing, which is suitable for passive radar signal processing issues. Background technique [0002] Passive radar utilizes an existing opportunity signal as a task such as a transmit signal, completing target detection, classification, and parameter estimation. When using multiple opportunities to signal sources and reception stations, the advantages of multi-input Multiple Output (MIMO) technologies can be utilized to improve performance. According to Document 1 (E.fishler, A. Haimovich, RSBlum, Ljcimini, D.chizhik Andr.A.Valenzuela, "Spatial Diversity In Radars-Models and DetectionPerformance," IEEE Transactions On Signal Processing, Vol.54, NO. 3, PP.823-838, 2006.) In the passive MIMO radar system, coherent or non-coherent processing can be employed according to...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S7/40G01S7/41
CPCG01S7/40G01S7/418
Inventor 何茜王珍
Owner UNIV OF ELECTRONICS SCI & TECH OF CHINA
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