Frequency hopping synchronization method suitable for PDT/DMR

Abstract

The invention discloses a frequency hopping synchronization method suitable for PDT / DMR, and belongs to the technical field of wireless communication. A transmitting party forms a frequency hopping synchronization frame through processes of link encoding, synchronization word filling and the like on frequency hopping synchronization information, and transmits the frequency hopping synchronization frame to the receiving party through a synchronization frequency point; the receiving party is in a slow scanning state before synchronization, and can receive a complete frequency hopping synchronization frame when scanning that the frequency point of the receiving party is consistent with the frequency point of the transmitting party; after receiving the frequency hopping synchronization frame, the receiving party firstly searches synchronization words embedded in the synchronization frame, determines the initial position of the burst, extracts a payload according to the initial position of the burst, decodes and restores the frequency hopping synchronization information; and the receiving party shifts to a synchronous following hopping state according to the frequency hopping synchronization information and the judgment threshold to realize synchronous receiving. According to the invention, the frequency hopping synchronization frame structure is designed according to the PDT / DMR data link layer frame structure, so that the frequency hopping synchronization process is concise and rapid, and the anti-interference capability of PDT / DMR equipment is improved.

Description

Technical field[0001]The present invention relates to the field of wireless communication technology, and more particularly to a frequency hopping synchronization method suitable for PDT / DMR.Background technique[0002]With the development of communication technology, wireless communication equipment greatly facilitates people's daily life and work, especially mobile terminal equipment, not only in personal life, but also the needs of wireless communication equipment is more extensive. For example, rail transit, security, public security, emergency and other industries have a more special demand for special wireless communication equipment.[0003]At present, private network wireless communication devices usually use fixed frequency communication, the disadvantage of communication is poor, susceptible to natural interference such as noise, multi-user interference, and some frequency band interference, multi-frequency continuous wave interference, etc. interference.[0004]In order to im...

AI Technical Summary

Problems solved by technology

The technical difficulty of introducing frequency hopping into a relatively complete communication protocol is mainly to follow the original communication standard to the greatest extent, so there are relatively large restrictions on the realization and improvement of frequency hopping related synchronization, frequency hopping rate and other technologies

Taking the PDT standard protocol as an example, the time division multiple access frame structure is adopted. Each frame contains two time slots, and the duration of each time slot is 30ms. Under this air interface waveform, it not only limits the flexibility of the frequency hopping rate, but also affects the frequency hopping rate. The degree of freedom in the design of frequency synchronization implementation

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