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Rapid interpolation forming and filtering method suitable for DMR

A shaping filter and shaping filter technology, which is applied in the direction of frequency modulation carrier system, communication between multiple stations, etc., to achieve the effect of improving time domain resolution, increasing sampling rate, and accelerating realization

Inactive Publication Date: 2014-10-01
无锡交大联云科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

There is a lack of a fast interpolation shaping filtering method suitable for DMR in the prior art

Method used

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  • Rapid interpolation forming and filtering method suitable for DMR

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Embodiment Construction

[0025] Embodiments of the present invention are described in detail below, examples of which are shown in the drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the figures are exemplary only for explaining the present invention and should not be construed as limiting the present invention.

[0026] Those skilled in the art can understand that the relevant modules involved in the present invention and the functions realized are carried out on the improved hardware and the device, device or system formed by it, by carrying conventional computer software programs in the prior art or The relevant agreement can be realized, and it is not an improvement on the computer software program or the relevant agreement in the prior art. For example, an improved computer hardware system can still realize specific functions of the hardware sys...

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Abstract

The invention discloses a rapid interpolation forming and filtering method suitable for a DMR. The method includes the following steps that eightfold interpolation (seven zeros is inserted between every two symbols) is carried out on 132 base band four-electrical-level symbols (+3,-3, +1,-1) needing to be transmitted, and therefore the number of data is expanded to 1056; the 1056 data are sent to a forming filter designed in advance for convolution operation, and appropriate data adjustment is carried out on a result of convolution operation to meet the requirement for a DA full scale and a channel address. By the adoption of a multi-rate processing technology, the time domain resolution ratio of signals can be improved, the sampling rate of the signals is increased, the four-electrical-level base band signals are formed and filtered through a convolution algorithm, the step of multiplying by zero is omitted, the operation amount is reduced, realization of interpolation forming and filtering is accelerated, and convenience is provided for reliability and rapidness of the DMR.

Description

technical field [0001] The invention generally relates to a fast interpolation shaping filtering method suitable for DMR, and relates to the technical field of digital mobile wireless communication. Background technique [0002] The private wireless communication system is developing rapidly today, and it plays a huge role in the communication field because of its unique dispatching function, group calling function and fast calling characteristics. With the development of mobile communication technology, dedicated wireless communication systems are gradually undergoing a transition from analog to digital. DMR (Digital Mobile Radio, digital mobile wireless communication system) is the latest dedicated digital communication system standard proposed by the international ETSI organization, and the digital modulation method it uses is 4FSK. [0003] In the design of digital mobile wireless communication system, some key technologies of DMR physical layer include 4FSK modulation ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B7/26H04L27/12
Inventor 黄金伟杨震韦祥云曹婷婷王斌吴兴健潘双玲杨文君
Owner 无锡交大联云科技有限公司