Narrowband high-speed frequency-hopping data sending and receiving method

Abstract

The invention discloses a narrowband high-speed frequency-hopping data sending and receiving method, including the following steps: S1. a main station circularly sends service frames which include synchronous time slots and data time slots; S2. when the data time slots of the service frames are sent, the main station detects whether a data sending request message exists, if yes, channel coding interleaving is performed on information of each data frame that is sent, then a hop counter and data verification information are added behind data information of each hop, and finally the data frames are sent according to hops; S3. a slave station realizes frequency hopping synchronization with the main station according to searched synchronization information and periodically performs synchronization maintenance according to synchronous time slot information; and S4. the slave station performs interleaved frame judgment according to data verification of received demodulation information and the hop counter of each hop, and decodes the received data frames according to a decoding capability, thereby restoring and obtaining transmitted data information. The narrowband high-speed frequency-hopping data sending and receiving method has the advantages of small data transmission delay, small synchronization overhead and high data transmission efficiency.

Description

technical field [0001] The invention belongs to the field of wireless anti-interference digital communication, in particular to a method for transmitting and receiving narrow-band high-speed frequency-hopping data. Background technique [0002] Frequency hopping communication is the discrete change of the carrier used to transmit the signal between the receiver and the transmitter according to a certain rule, and it is also a kind of spread spectrum communication. If you want to obtain the communication content, you must know the change rule of the carrier frequency, so it has a certain resistance. Interference, anti-interception capabilities, and spectrum resource sharing. Based on the frequency hopping communication system, it can carry out point-to-point, point-to-multipoint and multi-hop high-reliability data transmission communication, and can carry digital voice, short message, IP data, networking and routing information, and build various networks according to applica...

AI Technical Summary

Problems solved by technology

The high reliability of frequency hopping synchronization is the basic requirement of most frequency hopping communication systems, but this method will bring disadvantages to some special applications, and the synchronization overhead will lead to a decrease in data transmission efficiency and an increase in data transmission delay

In addition, the traditional data transmission method is generally static TDMA, that is, the position of the data time slot is fixed, and the corresponding data frame can only be sent when the corresponding data time slot is reached, which further prolongs the delay of data transmission.

Therefore, the traditional method is difficult to meet the anti-interference and frequency hopping communication system with high requirements for data transmission delay.

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