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A distance measurement method, device and recording medium based on joint estimation

A ranging method and joint estimation technology, which can be applied to measurement devices, radio wave measurement systems, instruments, etc., can solve the problem of low ranging accuracy, reduce ranging ambiguity, improve ranging action distance, and improve ranging. The effect of accuracy

Active Publication Date: 2021-03-26
BEIJING RES INST OF TELEMETRY +1
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Problems solved by technology

However, most of the above documents are based on CDMA signals, OFDM signals, PN sequence ranging methods or two-way ranging and calibration methods, and the high-precision ranging technology for the linear modulation signal of the data link system commonly used in measurement and control systems is rarely involved, or ranging low precision

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  • A distance measurement method, device and recording medium based on joint estimation
  • A distance measurement method, device and recording medium based on joint estimation
  • A distance measurement method, device and recording medium based on joint estimation

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Embodiment 1

[0086] Comparing the performance simulation results of the ranging method of the present invention with the theoretical performance limit of ranging, figure 2 It is the root mean square error performance of the ranging error based on the joint estimation ranging method in the data link system of the present invention. Adopt BPSK signal, oversampling L = 4 times, roll-off coefficients are α = 0.1, 0.35, set oversampling signal N = 1000, and the accuracy of the rough ranging method is 0.1μs × 3 × 10 when the symbol rate is 10MHz 8 m / s=30m. Analysis shows that when α=0.1, SNR=10dB, 20dB, 30dB correspond to the mean square error of the ranging error is 0.26m, 0.07m, 0.02m; when α=0.35, SNR=10dB, 20dB, 30dB correspond to the range error The mean square error is 0.19m, 0.05m, 0.01m. When the signal-to-noise ratio SNR>10dB, the mean square error of the ranging error of the algorithm of the present invention can approach the theoretical performance limit, which greatly improves the...

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Abstract

The invention relates to a ranging method based on joint estimation. The method comprises: step one, according to a received signal x(kTs), acquiring a rough ranging information estimation value d^c,and calculating a sum y(Ln+1) of a real part absolute value and a virtual part absolute value of the received signal x(kTs); step two, carrying out weighted accumulation processing on the sum y(Ln+1)of the real part absolute value and the virtual part absolute value of the received signal x(kTs) in the step one and calculating a precise ranging information estimation value d^F; and step three, calculating an accurate ranging information estimation value d^ between two communication terminals based on the rough ranging information estimation value d^c in the step one and the precise ranging information estimation value d^F in the step two, wherein the estimation values meet a formula: d^=d^c+d^F.

Description

technical field [0001] The invention relates to a ranging method, device and recording medium based on joint estimation, and belongs to the technical field of digital wireless communication transmission. Background technique [0002] In a wireless communication system, due to attitude changes, the navigation information between mobile communication terminals is often weak, or the navigation signal is interfered, and it is difficult to obtain the position information provided by satellite navigation. Distance information and location information. Especially in the UAV data link system, the measurement and control system needs to obtain the position of the UAV to adjust the parameter configuration and link strategy of the information transmission system, and improve the invulnerability of the combat system. [0003] The traditional pseudo-random code ranging technology has the characteristics of anti-interference, anti-multipath fading, and good concealment, but its ranging a...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L27/26G01S1/22
CPCG01S1/22H04L27/2656H04L27/2657H04L27/2695
Inventor 闫朝星付林罡谌明
Owner BEIJING RES INST OF TELEMETRY
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