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Carrier synchronization realizing method under physical layer simulation mode of DMR (Digital Mobile Radio) communication system

A technology of a communication system and an implementation method, which is applied to transmission systems, synchronization devices, multi-frequency code systems, etc., can solve the problem that the DMR communication device cannot be synchronized with the carrier wave, and achieves the problem of solving the problem of carrier synchronization tracking frequency offset, precise carrier synchronization, fast The effect of accurate synchronization

Active Publication Date: 2014-03-19
FUJIAN KIRISUN ELECTRONICS
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Problems solved by technology

[0003] In view of the above-mentioned shortcoming that the DMR communication device in the prior art cannot use the existing method to realize carrier synchronization, the present invention provides a method for realizing the synchronization of the carrier wave in the physical layer analog mode of the DMR communication system, which solves the above problems

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  • Carrier synchronization realizing method under physical layer simulation mode of DMR (Digital Mobile Radio) communication system

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Embodiment Construction

[0025] This embodiment is a preferred implementation mode of the present invention, and other principles and basic structures that are the same or similar to this embodiment are within the protection scope of the present invention.

[0026] Please see attached figure 1 The hardware circuit part involved in the present invention includes an antenna, an intermediate frequency digital processing chip, a DSP and a phase-locked loop. The antenna receives the communication signal, and transmits the signal to the intermediate frequency digital processing chip. In this embodiment, the intermediate frequency digital processing chip adopts the chip model of AD9864. During specific implementation, other types of chips with the same function can also be used instead. DSP reads the I value and Q value from the intermediate frequency digital processing chip, that is, after the intermediate frequency digital processing chip is configured, its output is transmitted to the DSP at a certain rat...

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Abstract

The invention discloses a carrier synchronization realizing method under a physical layer simulation mode of a DMR (Digital Mobile Radio) communication system. In the method, a DSP (Digital Signal Processor) reads an I value and a Q value from an intermediate-frequency digitalization processing chip; the DSP calculates carrier shift according to the I value and the Q value; the DSP adjusts a phaselocked loop parameter according to the carrier shift; and a phaselocked loop locks phases to achieve carrier synchronization. The invention can be applied to the carrier synchronization under the physical layer simulation mode of the DMR communication system, and can be further expanded to the field of communication products under all CPFSK (Continuous Phase Frequency Shift Keying) modulation modes. By adopting the invention, the problem of carrier synchronization tracking frequency offset can be solved, fast and accurate synchronization is realized on a DSP platform, and carrier synchronization can be fast and precisely realized within 6ms (which is relative to the locking time of a used phaselocked loop chip), wherein the synchronization precision is 16.02Hz.

Description

technical field [0001] The invention discloses a carrier wave synchronization realization method, in particular to a DMR communication system physical layer simulation mode download wave synchronization realization method. Background technique [0002] DMR (that is: Digital Mobile Radio) wireless communication standard is a digital trunking standard launched by the European Communications Standards Association. At present, there is no mature product in China. In the DMR standard, it is clearly required to be compatible with the existing analog wireless system, so how to realize the current general FM analog modulation and demodulation mode on the DMR-based digital platform will be realized by the commercialization of the DMR system A technical difficulty that must be overcome. At present, the domestic digital communication platform is in the situation of alternating analog and digital. In order to realize the smooth transition from analog to digital platform for pro...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L27/26H04L7/033
Inventor 付文良赵蕊
Owner FUJIAN KIRISUN ELECTRONICS
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