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Method for single path detecting input signal phase difference and relative amplitude

A technology of input signal and relative amplitude, applied in transmission monitoring, transmission system, communication channel monitoring, etc., can solve problems such as debugging and manufacturing difficulties, channel matching difficulties, inaccurate phase difference, etc., to quickly determine signals and process signals, The algorithm is simple and reliable, and the effect of high reliability

Inactive Publication Date: 2007-04-11
NO 54 INST OF CHINA ELECTRONICS SCI & TECH GRP
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Problems solved by technology

Use phase-locked loop technology to track and filter the input signal to improve the signal-to-noise ratio of the input signal, and then perform phase detection to obtain the signal phase difference. It can use a single-channel solution, but there are slow lock-in, complicated equipment, debugging and Difficult to manufacture, high cost, approximately linear loop and many other disadvantages
The method of detecting phase difference after dual-channel or multi-channel sampling has disadvantages such as complex hardware, difficult channel matching, inaccurate phase difference caused by drift between channels, and the need for full-cycle sampling.

Method used

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  • Method for single path detecting input signal phase difference and relative amplitude
  • Method for single path detecting input signal phase difference and relative amplitude
  • Method for single path detecting input signal phase difference and relative amplitude

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Embodiment Construction

[0023] Implementation steps of the present invention:

[0024] ① The secondary signal of the signal is suppressed and modulated by the modulator, and then synthesized into a single channel with the main signal.

[0025] Embodiment Referring to Fig. 1, Fig. 2, and Fig. 3, the signal modulation and combining unit 1 selects one signal among multiple input signals as the main signal A and directly enters the combiner 2, and the main signal A is the reference signal or the input with the largest power signal, and the other m input signals B1 to Bm are used as secondary signals to be modulated by signals of different modulation signal frequencies through suppressed carrier modulators 1-1.1 to 1-1.m, and then combined with the main signal in combiner 1-2 to form one , where the input signal frequency can be any sinusoidal signal from tens of kHz to tens of GHz, and the modulation signal is a low-frequency square wave signal or sinusoidal signal of different frequencies.

[0026] Let...

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Abstract

This invention discloses a method for testing phase difference and relative amplitude of input signals in single channels, which generates modulation signals by a control frequency splitter then to modulate the input signals to merge them to mono-channel transmission, then the merged signals are transformed, sampled, window- added and FFT to get information of phase difference, amplitude and relative amplitude.

Description

technical field [0001] The invention relates to a single-channel method for detecting the phase difference and relative amplitude of the input signal between two or more input signals in the communication field, which is especially suitable for making a single-channel single-pulse tracking receiver in the antenna tracking technology It can also be used in other devices that need to detect precise phase difference. Background technique [0002] There are two main methods for phase difference detection when the signal-to-noise ratio of the current input signal is low and the signal frequency range is large: one is the phase-locked loop detection method, and the other is through the fast Fourier transform (FFT for short) after dual-channel sampling. ) to detect the phase difference or to use cross-correlation to detect the phase difference. Use phase-locked loop technology to track and filter the input signal to improve the signal-to-noise ratio of the input signal, and then p...

Claims

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Application Information

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IPC IPC(8): H04L27/26H04B17/00H04B17/30
Inventor 李强闵洁
Owner NO 54 INST OF CHINA ELECTRONICS SCI & TECH GRP
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