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Improved method for digitizing bit synchronization

A bit synchronization, one-way technology, applied in the communication between multiple stations, electrical components, transmission systems, etc., can solve the problems of limited algorithm performance, source form, DMR bit synchronization algorithm performance deterioration, etc.

Active Publication Date: 2012-12-26
HYTERA COMM CORP
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Problems solved by technology

[0016] The purpose of the present invention is to improve the DMR bit synchronization algorithm of the prior art, to solve the problem that the performance of the algorithm is limited by the source form, to provide an improved method for bit synchronization digitization, so that the method can also be used under random information sources It can run well, meet the requirements of the actual situation, and further improve the performance degradation of the original DMR bit synchronization algorithm when the noise is large

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  • Improved method for digitizing bit synchronization
  • Improved method for digitizing bit synchronization
  • Improved method for digitizing bit synchronization

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Embodiment Construction

[0058] An improved bit synchronous digitization method of the present invention is aimed at any random signal source, and the method includes: performing interval delay on the input signal sequence, the signal sequence includes at least one input signal; The signal is multiplied by the input signal of at least one local channel within one symbol period, and the multiplied output value is accumulated and averaged within the symbol period; the average value of each channel of each input signal is compared , and select the mean value of the channel with the largest average value and its corresponding decoding output; and in the preset time window length, integrate the maximum mean value of each channel, compare the integral values ​​of each channel, and select the corresponding channel with the largest integral value decoded output.

[0059] Wherein, if four channels of complex signal input are used, the interval delay settings of the signal sequences are respectively set as foll...

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Abstract

An improved method for digitizing bit synchronization for any random signal source comprises the following steps: delaying an inputted signal sequence at intervals, wherein the signal sequence contains at least more than one path of input signals; multiplying the input signals of each path respectively by at least more than one input signals of the local channels within one symbol period, the multiplied output values are accumulated and then averaged to get the average values within the symbol period; comparing the average values of each channel of each path of input signals, and outputting the selected average value of the path with the maximum average value and its corresponding decode; integrating the maximum average value of each path in a preset time window length, and comparing the integral values of each path, then selecting the path with the maximum integral value and outputting its corresponding decode. It can run well under the random signal resource and satisfy the requirement of real conditions, and can further improve the performance deterioration problem of the original Digital Mobile Radio (DMR) bit synchronization method when the noise is large.

Description

technical field [0001] The present invention relates to bit synchronization technology in the field of wireless communication, and relates to an improved method for digitalizing bit synchronization, which can be applied to the field of professional wireless communication of Digital Mobile Radio (DMR) and all continuous phase frequency shift keying ( Continuous Phase Frequency Shift Keying, referred to as CPFSK) modulation communication product field. Background technique [0002] For any wireless communication product, the realization of bit synchronization has always been a key difficulty. Because digital information is a series of consecutive symbol sequences, due to the existence of noise and intersymbol interference, in order to obtain reliable judgment results and reduce the bit error rate of the system, it is required to obtain the best sampling time (eye diagram) in each symbol period open the maximum position) to sample and judge the coherently demodulated baseband ...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L27/18H04B7/26H04B1/707
CPCH04B1/707
Inventor 王可黄钦旋
Owner HYTERA COMM CORP
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