Method for rapidly receiving data and matched filtering applicable to DMR (Digital Mobile Radio)

Abstract

The invention discloses a method for rapidly receiving data and matched filtering applicable to a DMR (Digital Mobile Radio). The method comprises the following steps: firstly, sampling and placing 2304 data into a 384*6 annular array by an AD (Access Device); secondly, taking four successive groups of 384 data every time, assigning the data to an intermediate variable and then shifting the convoluted data after performing convolution operation on those data through a designed square root raised cosine filter in advance, and finally obtaining a final matched output. According to the method, the data acquired by the continuous AD can be rapidly processed, the matched filtering can be performed quickly, and the noise of a system can be filtrated out, therefore, the method is beneficial for the system to rapidly lock synchronous codes, so as to recover the data more quickly and accurately.

Description

technical field [0001] The invention belongs to the field of digital mobile communication systems, and in particular relates to a method for quickly receiving data and matching filtering suitable for DMR. Background technique [0002] The dedicated wireless communication system (walkie-talkie) is an earlier command method. It is a mobile communication system used for group dispatching and command communication. It is still widely used until now. As an important branch of wireless communication, the available channels of the system can be shared by all users of the system, and it has the function of automatic channel selection. It is the carrier of resource sharing. In addition to the voice function of ordinary wireless communication, it also emphasizes group calls. , quick connection and other command and dispatch functions. It plays a vital role in the government, logistics, and dispatching command organizations. [0003] At present, there are a large number of analog wal...

AI Technical Summary

Problems solved by technology

Second, the digital two-way radio system can provide voice and rich data services, while the traditional analog two-way radio can only provide simple voice services

[0006] Looking at the current matched filtering method, the filter is only designed as a square root raised cosine filter with the same coefficient as the shaping filter at the sending end, which has a large amount of calculation and takes a long time, and has high requirements for the DSP processor.

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