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One-symbol differential 4FSK demodulation method for power wireless private network

A 4FSK, wireless private network technology, applied in the field of modulation and demodulation, can solve the problems of unsuitable signal detection and low precision, and achieve the effect of simple implementation, low complexity and good robustness

Active Publication Date: 2014-09-03
STATE GRID CORP OF CHINA +2
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Problems solved by technology

However, these methods have low accuracy and are not suitable for signal detection at higher data rates.

Method used

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  • One-symbol differential 4FSK demodulation method for power wireless private network
  • One-symbol differential 4FSK demodulation method for power wireless private network
  • One-symbol differential 4FSK demodulation method for power wireless private network

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Embodiment Construction

[0023] The present invention will be described in further detail below in conjunction with the accompanying drawings and specific embodiments.

[0024] A 1-symbol differential 4FSK demodulation method for electric power wireless private network, its network system such as figure 1 As shown, it includes a main station computer, a front-end computer, a base station, and an intelligent terminal. The intelligent terminal is used to realize power information collection and load control switching control. A plurality of the intelligent terminals are connected to the base station through a wireless ad hoc network. The base station and the The main station computers are connected by wired links, and the front-end processor is used as the interface device of the main station computer to classify, summarize and distribute the data between the main station computer and the base station; between the base station and each intelligent terminal Continuous phase 4FSK modulation for wireless t...

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Abstract

The invention discloses a one-symbol differential 4FSK demodulation method for a power wireless private network. The method includes the steps of obtaining a 4FSK continuous phase carrier modulation signal s(t), then calculating a phase variable delta phi of the continuous phase carrier modulation signal s(t) in symbol time, and finally demodulating a symbol sequence In sent by a transmission end according to a mapping relation of the phase variable delta phi and a symbol sequence In. The method has the advantages of being low in algorithm complexity, easy to implement and saving hardware resources. Detection performance of the algorithm is not sensitive to both frequency offset and phase offset, robustness is good, and the method has important theoretical value and actual application value.

Description

technical field [0001] The invention belongs to modulation and demodulation technology in the field of digital communication, in particular, it is a 1-symbol differential 4FSK demodulation method for electric power wireless private network. Background technique [0002] The electric power wireless private network is a data support system for power supply enterprises to comprehensively grasp the electricity consumption information of each electricity customer. It has functions such as power load implementation monitoring, remote meter reading, power quality monitoring, line loss analysis, and reactive power compensation management. Station computer, base station and a large number of data collection and monitoring terminals. The base station and each data collection and monitoring terminal usually use 230MHz dedicated network channel for wireless communication. [0003] In order to meet the wireless transmission of a large amount of data between the terminal and the base stat...

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Application Information

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IPC IPC(8): H04L27/14
Inventor 侯兴哲孙洪亮陶时伟宫林刘荣梅黄天聪刘国岭何昊辰廖晓慧
Owner STATE GRID CORP OF CHINA
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