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Rapid acquisition and synchronization method of wireless burst communication system

A burst communication and wireless technology, applied in the field of fast capture and synchronization, can solve the problem of how to communicate reliably with the receiver, and achieve the effect of fast capture and synchronization

Active Publication Date: 2020-07-03
TIANJIN JINHANG COMP TECH RES INST
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  • Application Information

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Problems solved by technology

[0004] The purpose of the present invention is: to provide a fast acquisition and synchronization method of a wireless burst communication system, to solve the problem of how to reliably communicate with a receiver at a low duty cycle in burst communication

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  • Rapid acquisition and synchronization method of wireless burst communication system
  • Rapid acquisition and synchronization method of wireless burst communication system

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Embodiment Construction

[0029] In order to make the purpose, content and advantages of the present invention clearer, the specific implementation manners of the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments.

[0030] refer to figure 2 As shown, the fast acquisition and synchronization method of the wireless burst communication system of the present invention includes the following processes:

[0031] First, the information sending end sends data, and the information receiving end performs AD band-pass sampling and digital down-conversion processing to convert the received signal to a zero-IF signal.

[0032] At the information sending end, the 128-bit information is divided into a basic data frame, and (128, 256) LDPC encoding is performed, and the encoding is 256 bits.

[0033] Then divide the 256bit into blocks. In this design, the 256bit is divided into three parts, which are 64bit, 128bit, and 64bit, and two PNs with a ...

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Abstract

The invention discloses a rapid capturing and synchronizing method of a wireless burst communication system, which comprises the following steps: step 1, an information sending end sends data, an information receiving end performs AD band-pass sampling and digital down-conversion processing, and a received signal is converted into a zero intermediate frequency signal; 2, channel estimation is carried out, and influence factors causing signal deformity are eliminated; step 3, frequency offset estimation: designing two groups of PNs at a fixed time interval, taking autocorrelation values generated by the two groups of PNs as two vector angles, and calculating an angle difference and a time difference to obtain frequency offset; 4, signal capture and frame synchronization, wherein signal capture and frame synchronization are completed by adopting a two-stage matched filter; and 5, carrying out GMSK demodulation and LDPC decoding to obtain information. According to the invention, a GMSK modulation and demodulation technology is adopted, and two independent PN short codes and LDPC coding are used to replace pilot frequency + frame header + check code, so that a receiver can receive datacompletely and reliably in an extremely short time.

Description

technical field [0001] The invention belongs to the technical field of wireless communication, and relates to a fast capture and synchronization method of a wireless burst communication system, which is particularly suitable for fast capture and synchronization in a low duty cycle and high dynamic environment. Background technique [0002] With the rise of networked data links and the trend of the Internet of Things, in practice a communication system hopes to accommodate as many communication units as possible, and it is necessary to ensure that the units can be networked quickly and communicate in real time. Then this kind of communication system hopes that its link layer can communicate as simple, reliable and efficient as possible, and it is hoped that the duty cycle should be as small as possible. However, the smaller the duty cycle, the greater the probability of the receiver missing an alarm, that is, the worse the reliability of the communication. Especially in prac...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L25/02H04L27/00H04L27/26H04L1/00
CPCH04L25/0212H04L27/0014H04L27/2656H04L1/0057H04L2027/0026
Inventor 李云涌李永翔
Owner TIANJIN JINHANG COMP TECH RES INST
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