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A Distributed Adaptive Direct Positioning Method for Color Received Signals

A technology for receiving signals and positioning methods, applied in the field of signal processing, can solve problems such as poor positioning performance, and achieve the effect of improving positioning performance and reducing the amount of positioning calculation.

Inactive Publication Date: 2018-06-19
UNIV OF ELECTRONICS SCI & TECH OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] The purpose of the present invention is to provide a distributed self-adaptive direct positioning method under the color receiving signal to improve the positioning performance in view of the defect of poor positioning performance under the condition of the color receiving signal in the background technology

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  • A Distributed Adaptive Direct Positioning Method for Color Received Signals
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  • A Distributed Adaptive Direct Positioning Method for Color Received Signals

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Embodiment Construction

[0041] The present invention will be described in further detail below in conjunction with the accompanying drawings and embodiments.

[0042] Such as figure 1 Shown is a schematic diagram of the working process of the distributed adaptive positioning method of the present invention, the derivation process of the distributed adaptive direct positioning method in the present invention is: firstly establish the baseband discrete-time signal model of the received signal; then propose a new signal model according to the signal model Cost function; finally, the distributed adaptive LMS algorithm is used to minimize the cost function, and a new centralized adaptive direct positioning method is derived; the specific derivation steps are as follows:

[0043] Step 1: Establish the baseband discrete-time signal model of the transmitter and receiver,

[0044] Suppose there are M space-separated receivers, each receiver receives a signal x i [n] can be expressed as:

[0045] x i [n]=s...

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Abstract

The invention belongs to the field of signal processing, relates to a passive positioning method in signal processing, and provides a distributed self-adaptive direct positioning method under the color receiving signal for the defect of poor positioning performance of the existing positioning method under the condition of color receiving signals, using In order to improve the positioning performance; sequentially through the acquisition of data, the first data exchange, adaptive calculation, the second data exchange, and the combination, the estimated value of the transmitter position is obtained by the end of the iteration. The present invention provides a new cost function, which is also applicable under the condition of white signal reception, and the performance of the two is equivalent; at the same time, the present invention does not require a gain control factor, and no additional gain control is required in each position iteration process The factor iteration effectively reduces the calculation amount of positioning; and under the condition of receiving color signals, the positioning performance of the positioning method provided by the present invention is greatly improved.

Description

technical field [0001] The invention belongs to the field of signal processing and relates to a passive positioning method in signal processing, in particular to a distributed self-adaptive direct positioning method under the condition of color receiving signals. Background technique [0002] At present, the passive positioning technology based on time difference can be divided into two categories according to whether it needs to calculate the time difference value: two-step positioning method and direct positioning method. In the two-step positioning method, the time difference value is estimated by receiving the signal in the first step, and the positioning solution is performed using the estimated time difference value in the second step. The direct positioning algorithm does not need to calculate the time difference, and directly uses the received signal to estimate the position of the target. In the case of low signal-to-noise ratio of the received signal, the position...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01S5/10
CPCG01S5/10
Inventor 夏威刘威朱凌峰夏兴隆
Owner UNIV OF ELECTRONICS SCI & TECH OF CHINA