Locomotive signal denoising processing method and system
A locomotive signal and signal technology, applied in the field of rail transit, can solve the problems of poor locomotive signal reception performance and poor interference filtering effect, and achieve the effects of improving reception performance, filtering noise signals, and improving signal-to-noise ratio.
Active Publication Date: 2018-07-24
BEIJING JIAODA SIGNAL TECH
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Problems solved by technology
At present, the commonly used filtering method has a better filtering effect on the out-of-band noise, but has a poor filtering effect on the noise interference in the same frequency band of the locomotive signal, which makes the reception performance of the locomotive signal poor.
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Embodiment Construction
[0064] figure 1 It is a flow chart of the locomotive signal denoising processing method provided in Embodiment 1 of the present invention, such as figure 1 As shown, the locomotive signal denoising processing method includes:
[0065] Step 101, measure and acquire the first locomotive signal between the first receiving coil and the coil common terminal, and the second locomotive signal between the second receiving coil and the coil common terminal, wherein the first receiving coil is connected in series with the second receiving coil, and The common terminal of the coil is drawn from the middle of the series branch.
[0066] In this embodiment, the structure of the receiving coil used to receive the vehicle signal is as follows figure 2 As shown, the receiving coil is composed of the first receiving coil on the left and the second receiving coil on the right in series, and a coil common terminal is drawn out between the two receiving coils. Wherein, the first receiving coi...
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The invention provides a de-noising processing method and system for locomotive signals. The method comprises the following steps: performing measurement to obtain a first locomotive signal between a first receiving coil and a common coil terminal and a second locomotive signal between a second receiving coil and the common coil terminal, wherein the first receiving coil and the second receiving coil are connected in series, and the common coil terminal is led out from the middle of a serial branch; carrying out subtraction operation on the first locomotive signal and the second locomotive signal to obtain a noise sample signal; and filtering out a noise signal from an actual locomotive signal by employing an adaptive filtering method according to the noise sample signal, wherein the actual locomotive signal is a sum of the first locomotive signal and the second locomotive signal. Since the obtained noise sample signal can be used for well estimating the properties of the noise signal in the actual locomotive signal, by means of the adaptive filtering processing, the signal to noise ratio of the locomotive signal can be increased, and the receiving performance of the locomotive signal is improved while the noise signal is effectively filtered.
Description
technical field [0001] The invention belongs to the technical field of rail transit, and in particular relates to a method and system for denoising a locomotive signal. Background technique [0002] In order to effectively control the high-speed train, the on-board train control equipment needs to obtain information such as the traffic control command sent from the ground control center, the position and speed of the train ahead, and the condition of the line ahead. These information are sent from the ground to the train, so , the ground-to-train information transmission channel is an important part of the train operation control system. The continuous ground-to-train signal transmission system includes track circuits, locomotive signal equipment, and train control vehicle equipment. [0003] The locomotive signal, also known as the locomotive automatic signal, is a signal display system that uses the locomotive signal machine installed in the locomotive driver's cab to aut...
Claims
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IPC IPC(8): H04B1/10
CPCH04B1/1027H04B1/1036
Inventor 不公告发明人
Owner BEIJING JIAODA SIGNAL TECH