CDAS station DCPR communication protocol and receiving method

A technology of a communication method and a receiving method, applied in the field of communication protocols, can solve the problems of small user capacity and low transmission data rate of the DCPR collection system, and achieve the effects of easy transportation and maintenance, increased user capacity, and simple protocol.

Active Publication Date: 2012-08-22
中国航天科技集团公司第五研究院第五〇四研究所
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  • Claims
  • Application Information

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Problems solved by technology

[0004] The technical solution problem of the present invention is: overcome the deficiencies in the prior art, provide a kind of CDAS (command data collection) station DCPR (data collection platform report) communication protocol and receiving method, solve the DCPR collection system user capacity is small, transmit data simultaneously low speed problem

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  • CDAS station DCPR communication protocol and receiving method
  • CDAS station DCPR communication protocol and receiving method
  • CDAS station DCPR communication protocol and receiving method

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Embodiment Construction

[0037] The following takes a domestic satellite as an example to introduce the present invention in detail.

[0038] The DCP data collection platform is the transmitter of the DCPR system. The design of the DCP communication system and protocol determines the communication system and protocol of the entire system. DCP collects local hydrometeorological and other information through sensors, and sends data to a certain batch of satellites regularly or randomly at a frequency of about 401MHz. The transmission frequency and transmission time of each DCP are uniquely determined by the system. A certain batch of satellite meteorological satellites forwarded data information to the ground in the 1.7GHz frequency band. Information processing procedures such as figure 1 , Mainly divided into several steps:

[0039] The first step is to encode the address of the DCP data collection platform with BCH (31, 21), and combine the encoded address with the sensor data in the DCP data collection p...

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Abstract

The invention relates to a DCPR communication protocol of a CDAS station and a receiving method thereof. The communication protocol comprises the following steps of: firstly, carrying out BCH coding to a DCP data collection platform and combining the coded addresses and sensor data into a user information frame; secondly, dividing the user information frame into a plurality of information subframes with 222 byte length, making up an information subframe by filling 0 for a final information subframe which does not have 222 symbols and increasing synchronous bytes at the front divided information subframes so as to form subframes with 223 byte length; thirdly, carrying out RS coding to the subframes and carrying out convolutional coding after interlacing; fourthly, combing the data information after convolutional coding and synchronization bit of carriers, homing sequence, unique codes, frame ends into an integral modulation data frame and carrying out QPSK modulation; and fifthly distributing addresses to the modulated signals according to the frequency and the time and transmitting the signals. The invention solves the problems that the user capacity of the DCPR collection system is little, and simultaneously the data transmission speed is low.

Description

Technical field [0001] The present invention relates to a communication protocol and a receiving scheme proposed for the communication protocol. Background technique [0002] The application of the DCPR collection system of domestic meteorological satellites began gradually in the late 1990s. However, the communication system is backward, generally using an analog system, the system user capacity is small, and the transmission data rate is low, which cannot meet the application requirements of the current national weather information collection system. The early foreign meteorological satellite DCPR collection system also uses an analog communication system. Although the current foreign DCPR is also undergoing digital transformation, the communication protocols are all specific to the country’s meteorological satellite transponders. There is no detailed communication protocol and corresponding The report of the receiving method, and because of the different parameters of the wea...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04B7/185H04L29/06H04L27/38
Inventor 陶孝锋刘晓旭
Owner 中国航天科技集团公司第五研究院第五〇四研究所
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