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Continuous phase modulation and demodulation method based on elliptic spherical wave signals

An elliptical spherical wave and phase modulation technology, applied in modulation carrier systems, phase modulation carrier systems, digital transmission systems, etc., can solve the problem of limited spectrum resources, achieve excellent spectrum performance, fast out-of-band attenuation, and small power bandwidth. Effect

Active Publication Date: 2020-09-25
NAVAL AVIATION UNIV
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Problems solved by technology

[0002] The spectrum resources that can be effectively used in the existing communication system are very limited, and the frequency band utilization and power efficiency of the modulated signal are important factors that affect the overall performance of the communication system.

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  • Continuous phase modulation and demodulation method based on elliptic spherical wave signals
  • Continuous phase modulation and demodulation method based on elliptic spherical wave signals
  • Continuous phase modulation and demodulation method based on elliptic spherical wave signals

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Embodiment Construction

[0044] The present invention will be described in further detail below in conjunction with the accompanying drawings and embodiments.

[0045] In order to better illustrate the implementation steps of the present invention and at the same time demonstrate the excellent characteristics of the present invention, the steps of using the expressions proposed in the present invention will be further described below in conjunction with the accompanying drawings. Apparently, the described embodiments are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0046] For example, in the remote sensing test of deep space exploration, CPM signals with constant envelope, insensitivity to nonlinear characteristics, and high spectral efficiency are usually required ...

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Abstract

The invention provides a continuous phase modulation and demodulation method based on elliptic spherical wave signals. According to the method, an elliptical spherical wave signal with time-frequencydomain high-energy aggregation in a signal space and flexible and controllable time bandwidth product is used as a baseband frequency modulation pulse signal of a continuous phase modulation signal togenerate a modulation signal, and output data is demodulated by using a waveform coherence detection method of the elliptical spherical wave signal. Compared with an existing continuous phase modulation signal based on rectangular pulses, raised cosine pulses and other signals, the modulation signal with higher energy aggregation and frequency band utilization rate can be obtained under the sameparameter condition, and the demodulation performance can be superior to that of existing continuous phase modulation signal differential coherence detection.

Description

technical field [0001] The invention relates to the field of digital signal transmission and processing, in particular to a continuous phase modulation and demodulation method based on ellipsoidal wave signals, which can be used for modulation and demodulation of continuous phase modulation signals in wireless digital communication systems. Background technique [0002] The spectrum resources that can be effectively used in the existing communication system are very limited, and the frequency band utilization and power efficiency of the modulated signal are important factors that affect the overall performance of the communication system. T.Aulin et al. of Lund University in Sweden published a series of papers in 1981, systematically expounding the continuous phase modulation (Continuous Phase Modulation, CPM) technology. This type of modulation signal has a constant envelope, high frequency band utilization and power efficiency. , less affected by nonlinear devices, etc., i...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L27/20H04L27/227
CPCH04L27/2003H04L27/2014H04L27/227
Inventor 杨大伟王红星刘传辉康家方张磊刘锡国
Owner NAVAL AVIATION UNIV
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