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Non-coherent demodulation device and demodulation method of CPM (continuous phase modulation) signal

A signal demodulation, non-coherent technology, applied in the modulation carrier system, digital transmission system, electrical components, etc., can solve the problems of limited system performance improvement, high complexity of CPM coherent demodulation, poor non-coherent demodulation effect, etc.

Inactive Publication Date: 2013-10-02
SHANGHAI RES CENT FOR WIRELESS COMM +1
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  • Abstract
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Problems solved by technology

However, since this method only extracts a piece of data for demodulation, the system performance is limited.
[0015] To sum up, since the complexity of CPM coherent demodulation is too high, and the effect of non-coherent demodulation is poor, how to find a demodulation method with simple structure and good effect becomes whether CPM modulation technology can play its advantages key

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  • Non-coherent demodulation device and demodulation method of CPM (continuous phase modulation) signal
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  • Non-coherent demodulation device and demodulation method of CPM (continuous phase modulation) signal

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Embodiment Construction

[0061] Embodiments of the present invention are described below through specific examples, and those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification. The present invention can also be implemented or applied through other different specific implementation modes, and various modifications or changes can be made to the details in this specification based on different viewpoints and applications without departing from the spirit of the present invention.

[0062] Such as figure 1 As shown, the non-coherent CPM signal demodulation device of the present invention includes an antenna 11, a receiving radio frequency module 12, a matched filter 13, a synchronization module 14, a symbol difference module 15, a Viterbi sequence detection module 16 and a modulation coefficient detection module 17. Wherein, the antenna 11, the receiving radio frequency module 12, the matched filter 13, the synch...

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Abstract

The invention provides a non-coherent demodulation device and a non-coherent demodulation method of CPM (continuous phase modulation) signals. The non-coherent demodulation device of CPM signals at least comprises an antenna, a reception radio-frequency module, a matching filter, a synchronization module, a symbol difference module, a Viterbi sequence detection module and a modulation coefficient detection module which are all sequentially connected, wherein the modulation coefficient detection module is then connected with the matching filter and the Viterbi sequence detection module. The non-coherent demodulation device and the non-coherent demodulation method of CPM (continuous phase modulation) signals has performance similar to coherent demodulation algorithm, and at the same time can tolerate relative large-scale carrier wave frequency deviation and phase change and trace changes in modulation coefficients in transmission signals, and the non-coherent demodulation device is simple in structure and has good demodulation effect.

Description

technical field [0001] The invention relates to the technical field of wireless communication, in particular to a non-coherent CPM signal demodulation device and demodulation method. Background technique [0002] Modulation is the process of embedding information into a carrier wave. Messages are carried in analog or digital form by carrier wave amplitude, frequency, phase, or a combination of the three, and then sent. [0003] According to the nature of the modulation signal, digital modulation technology can be divided into two types: constant envelope modulation and non-constant envelope modulation. The signal generated by the constant envelope modulation has a constant envelope and can work in the nonlinear amplification region of the power amplifier, so it has good power efficiency; the envelope of the non-constant envelope modulation signal will change with time, In order to avoid nonlinear distortion, the power amplifier needs to work in the linear amplification reg...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L27/233
Inventor 钱骅康凯
Owner SHANGHAI RES CENT FOR WIRELESS COMM
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