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A Calculation Method of Cramereau Bound for Mimo Radar with Split Antennas

A calculation method and a technology for splitting antennas, which are applied in the field of radar and can solve problems such as unrealistic independent noise.

Inactive Publication Date: 2017-09-26
UNIV OF ELECTRONICS SCI & TECH OF CHINA
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  • Application Information

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Problems solved by technology

However, in real life, the signals are orthogonal, the independent reflection coefficients of different paths, and the independent noise of different paths are unrealistic. It is necessary to study the MIMO radar with separate antennas under the assumption of no signal orthogonality, independent reflection coefficients, and independent noise. best estimate for research

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  • A Calculation Method of Cramereau Bound for Mimo Radar with Split Antennas
  • A Calculation Method of Cramereau Bound for Mimo Radar with Split Antennas
  • A Calculation Method of Cramereau Bound for Mimo Radar with Split Antennas

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Embodiment Construction

[0071] For the convenience of description, first define the following:

[0072] () T For the transpose, () H is the conjugate transpose, represents the Kronecker product, Represented as a Hadamard product, vec() represents the column as a vector.

[0073] Consider a split-antenna MIMO radar with M single-antenna transmitters and N single-antenna receivers. In a Cartesian coordinate system, the m(m=1,...,M)th transmitting antenna and the n(n =1,...,N) receiving antennas are located at with The mth transmitter at kT s The sampling value at time is T s is the sampling interval, k (k=1,…,K) is the sampling number, and the waveform is normalized as E. m is the transmitted signal energy of the mth transmitter,

[0074] So in kT s The signal received by the nth receiver at time is

[0075]

[0076] where τ nm , f nm , ζ nm Denotes the time delay corresponding to the nm path, the Doppler frequency and the reflection coefficient, which is constant in the observ...

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Abstract

The invention discloses a method for calculating the Cramerot bound of MIMO radar with split antennas, which belongs to the field of radar technology, and particularly relates to the calculation of the Cramerot bound of parameter estimation performance bounds in radar signal processing. First of all, for MIMO radar, the signal sampling values ​​received by N receivers are arranged in a row in order to form the received signal r, and the covariance matrix of the received signal is determined, and then the maximum likelihood estimation is obtained, and the values ​​corresponding to different transmitters to The sampled values ​​of the receiver path, and finally the Cramereau bound of the MIMO radar is calculated. The method of the present invention is generally applicable to various MIMO radars with separated antennas.

Description

technical field [0001] The invention belongs to the technical field of radar, and particularly relates to the calculation of the Cramerot bound of parameter estimation performance bound in radar signal processing. Background technique [0002] MIMO (Multiple Input Multiple Out) is a multi-antenna transceiver technology and an important basic technology for 3G and 4G communications. Due to the great success of this technology in the field of wireless communication, in 2004, Fisher, a well-known radar signal processing expert, used MIMO for radar for the first time, and proposed the concept of MIMO radar. Once proposed, it has received widespread attention in the radar field. It has the following main advantages: (1) Using MIMO technology, multiple transmitters can transmit independent waveforms, which can improve the complexity of the transmitted beam and the recognizability of parameters. (2) Use spatially distributed transmitters and receivers to observe targets from multi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01S7/02G01S7/41G01S7/40
CPCG01S7/02G01S7/40G01S7/41
Inventor 何茜胡建宾吴永刚
Owner UNIV OF ELECTRONICS SCI & TECH OF CHINA