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Method for generating Multiple Input Multiple Output (MIMO)-over the horizon (OTH) radar waveform

A MIMO-OTH, radar waveform technology, applied in the field of radar communication, can solve the problem of difficult analytical solution of the objective function, and achieve the effect of improving detection performance and low computational complexity

Inactive Publication Date: 2013-04-03
UNIV OF ELECTRONIC SCI & TECH OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the above objective function is difficult to solve analytically, and then the closed expression

Method used

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  • Method for generating Multiple Input Multiple Output (MIMO)-over the horizon (OTH) radar waveform
  • Method for generating Multiple Input Multiple Output (MIMO)-over the horizon (OTH) radar waveform
  • Method for generating Multiple Input Multiple Output (MIMO)-over the horizon (OTH) radar waveform

Examples

Experimental program
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Embodiment 1

[0094] Assume that the number of transmitting antennas T=2, represented in the attached figure as: Transmit Antenna 1, Transmit Antenna 2, the number of receiving antennas R=2, represented as Sensor 1, Sensor 2 in the attached figure, and the baseband frequency range is 5MHz≤ F≤10MHz, then the baseband spectrum width is W=5MHz, and the observation time length is T t =1μs, the total energy of the signal is limited to E=10 6 Joule; noise power spectral density such as figure 1 shown. Clutter Power Spectral Density see figure 2 ; In this embodiment, assuming that the target frequency response of irradiation is flat, then the target response determination part has: |G 11 (F)| 2 =|G 12 (F)| 2 =|G 21 (F)| 2 =|G 22 (F)| 2 = 1, because the reflection power of the target is the same, so the reflection variance of the target Adopt the MMA algorithm of the present invention to quickly obtain the energy spectral density of the optimum waveform of transmitting antenna 1, 2, it...

Embodiment 2

[0097] The clutter power spectral density in embodiment 1 is by Figure 5 Given, adopt the MMA algorithm of the present invention to obtain the energy spectral density of the optimal waveform of transmitting antenna 1, 2, its schematic diagram is as Image 6 shown. At this time with the existing chirp signal (see Figure 4 ) compared to 0.2277dB improvement.

Embodiment 3

[0099] The noise power spectral density in embodiment 1 is as Figure 7 As shown, at the same time, the power spectral density of the clutter is given by Figure 8 Given, and the reflection power of the target is not the same, the variance of the target reflection is with Adopt the MMA algorithm of the present invention to obtain the energy spectral density of the optimum waveform of transmitting antenna 1,2, its schematic diagram is as Figure 9 shown. At this time with the existing chirp signal (see Figure 4 ) compared to 0.2289dB improvement.

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Abstract

The invention discloses a method for generating a Multiple Input Multiple Output (MIMO)-over the horizon (OTH) radar waveform, belongs to the technical field of radar communication and particularly relates to a method for emitting the waveform by generating an MIMO-OTH radar system based on a best emitting signal energy spectrum (ESD). The MIMO-OTH radar is under the noise and the clutter background relied by signals, an ionized layer limits the MIMO-OTH radar working band, the total emission energy is limited, a maximum J separating size serves as a standard, the optimized waveform is generated, the energy spectral density of the orthogonal transmit waveform can be obtained quickly and efficiently through a Maximum marginal income distribution (MMA) algorithm, and the wave sequence of MIMO-OTH radar system emitting signals can be obtained. The generated operation is low in complexity, and emitting signals are high in detection performance of targets.

Description

technical field [0001] The invention relates to the technical field of radar communication, in particular to a method for generating a transmission waveform of a MIMO-OTH radar system based on an energy spectrum (ESD) of an optimal transmission signal. Background technique [0002] Multiple-input multiple-output (MIMO) technology is a communication technology that comprehensively utilizes multiple diversity, and it uses multiple transceiver antennas to achieve high-speed and reliable communication in a wireless environment. Compared with the traditional phased array radar, the advantages of MIMO radar include the ability to transmit arbitrary waveforms, providing more degrees of freedom for the design of radar systems, and so on. The waveform design of MIMO radar is generally aimed at improving a certain performance of the system to optimize the transmission waveform, for example, to improve the performance of target detection, estimation, classification and recognition or b...

Claims

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Application Information

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IPC IPC(8): G01S7/282
Inventor 何茜骆恒何子述汪霜玲李晓东
Owner UNIV OF ELECTRONIC SCI & TECH OF CHINA
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