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A kind of different rate demodulation method and device of fsk signal

A demodulation method and signal technology, which is applied in the direction of modulation carrier system, digital transmission system, electrical components, etc., can solve problems such as accumulated bit errors, and achieve the effect of reducing complexity, storage resources and time resources

Active Publication Date: 2018-09-28
NO 30 INST OF CHINA ELECTRONIC TECH GRP CORP
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Problems solved by technology

It solves the problem that direct demodulation will generate cumulative bit errors when there is a difference between the target code rate and the actual code rate of the sampling rate of the FSK modulated signal, and avoids the calculation process of using the rate conversion in the traditional method

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  • A kind of different rate demodulation method and device of fsk signal

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Embodiment Construction

[0025] All features disclosed in this specification, or steps in all methods or processes disclosed, may be combined in any manner, except for mutually exclusive features and / or steps.

[0026] Any feature disclosed in this specification (including any appended claims, abstract and drawings), unless expressly stated otherwise, may be replaced by alternative features which are equivalent or serve a similar purpose. That is, unless expressly stated otherwise, each feature is one example only of a series of equivalent or similar features.

[0027] According to the difference between the baseband data target code rate and the actual code rate of the FSK signal, calculate the number of demodulated samples N1 required to generate an error sample point and the cumulative number of errors N2 per processing a baseband data. Before demodulation, the error The accumulated count is cleared. During demodulation, each time a baseband data is processed, the accumulated error data increases b...

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Abstract

The invention relates to the field where the fsk modulation signal is modulated and particularly relates to an FSK signal abnormal speed demodulation method and a device. According to the problem existing in the prior art, the invention provides an FSK signal abnormal speed demodulation method and a device. The FSK signal abnormal speed demodulation method comprises steps of calculating a sample point quantity N1 which needs to be regulated by an error sample point and an error accumulation quantity N2 when each baseband data is processed, performing multiplex and discarding processing on the baseband data after modulation according to the relation between the error accumulation parameter E and the N1 and the relation between the Delta f and 0, and enabling the object code speed of the baseband data to be identical to the real code speed. The invention solves the problem that the when the difference exists between the sampling rate of the FSK modulation signal and the real code rate, direct modulation can produce accumulation error code while avoiding the operation processing through the rate conversion in the traditional method.

Description

technical field [0001] The invention relates to the field of demodulating FSK modulated signals, in particular to a method and device for demodulating FSK signals at different rates. Background technique [0002] Usually, when demodulating an fsk modulated signal, the target code rate of the baseband data is required to be consistent with the actual code rate of the signal. If the target code rate of the sampled baseband data is inconsistent with the code rate of the real signal, rate conversion is required, and processing algorithms such as up-insertion, decimation, and filtering are used to make the target code rate of the baseband data consistent with the code rate of the real signal. Then demodulate. In the process of rate conversion calculation of the signal, a large amount of memory space is used and a large number of calculations are performed, thus greatly consuming space resources and time resources of the processor. Contents of the invention [0003] The techni...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L27/144
CPCH04L27/144
Inventor 魏兴雲
Owner NO 30 INST OF CHINA ELECTRONIC TECH GRP CORP
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