High precision pulse 60GHz wireless fingerprint positioning method based on energy detection
A technology of energy detection and fingerprint positioning, which is applied in positioning, wireless communication, radio wave measurement system, etc., can solve the problems of accuracy stability gap and inability to meet a wide range of applications, and achieve accurate nonlinear relationship and overcome nonlinearity relationship effect
Inactive Publication Date: 2016-05-25
OCEAN UNIV OF CHINA
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Therefore, the problem becomes how to set an appropriate normalization threshold according to the fingerprint characteristics of the signal. The simplest method in the threshold method is the fixed normalization threshold method, in which the normalization threshold is a fixed value. In practical applications, the normalization threshold is always changing in different environments, so it cannot satisfy a wide range of applications.
Next is the normalized threshold method based on K. Although the complexity of this algorithm is reduced, these algorithms are compared with the joint TOA fingerprint estimation algorithm based on skewness S, kurtosis K and minimum slope MS proposed in the present invention. There is a big gap in accuracy or stability, especially in multipath and NLOS environments.
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[0073]When performing wireless positioning, the terminal to be positioned sends multiple 60GHz pulse sequences regularly according to its settings, so as to facilitate multiple measurements. All positioning base stations that receive the pulse sequence, after obtaining the average joint parameter value through energy reception, obtain the estimated value of the optimal normalization threshold according to the pre-trained neural network, so as to finally obtain the estimated value of TOA; and calculate the result Then, on the positioning server side, according to the measured distance or distance difference and the coordinate position of the reference base station, use TOA or TDOA positioning algorithm to determine the spatial position of the terminal to be tested. Such as Figure 7 As shown, it mainly includes the following steps:
[0074] (1), system initialization
[0075] System initialization, including software and hardware installation and related configuration.
[00...
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The invention discloses a high precision pulse 60GHz wireless fingerprint positioning method based on energy detection. The method comprises following steps of 1), solving a combined parameter J composed of a skewness, a kurtosis and a minimum slope of a signal and an optimum normalization threshold demanded for TOA (Time of Arrival) estimation; 2), building a fingerprint database between the J and the optimum normalization threshold; 3), estimating the optimum normalization threshold according to the fingerprint database and the combined parameter J; 4), carrying out the TOA estimation, selecting the intermediate value of an energy block firstly exceeding the threshold as a TOA estimation value, and further calculating a distance; and 5), carrying out 60GHz wireless positioning, carrying out wireless positioning based on 60GHz millimeter waves by using a conventional positioning algorithm according to the TOA estimation value. The result shows that in an IEEE 802.15.3c channel mode, whatever it is line-of-sight or non-line-of-sight, the method has higher precision and better robustness than other detection based on energy in a wide Signal to Noise Ratio range.
Description
technical field [0001] The invention belongs to the technical field of wireless positioning, in particular to a high-precision pulse 60GHz wireless fingerprint positioning method based on energy detection. Background technique [0002] Pulse 60GHz wireless communication technology is a wireless communication technology that uses hundreds of picoseconds or shorter discontinuous pulses for communication without carrier. Compared with the current existing communication systems, 60GHz wireless communication technology has the advantages of high spectrum reusability, strong anti-interference ability, wide available spectrum, large transmission power, large system capacity, high time resolution and multipath resolution. One of the main reasons for widespread attention to 60GHz technology in recent years is because of the huge license-free bandwidth. Compared with the ultra-wideband technology that also uses the license-free frequency band, the 60GHz technology has a continuous fr...
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IPC IPC(8): H04W64/00G01S5/06
CPCH04W64/00G01S5/06
Inventor 梁晓林张浩吕婷婷杜宁靳一恒
Owner OCEAN UNIV OF CHINA