Method and system for non-data-aided synchronization of wireless burst communication all-digital receiver

Abstract

The invention discloses a method and a system for non-data-aided synchronization of a wireless burst communication all-digital receiver. The method comprises the following steps that: an energy detection module takes M sample data as a group to calculate energy sum, when the energy sum detected for successive N times is more than or equal to a preset threshold, data effective signals and effective data in the sample data are output, and until the energy sum of the sample data detected for the successive N times is smaller than the preset threshold, the data effective signals and effective data are stopped outputting; a clock recovery module stores the effective data, utilizes the effective data for clock recovery and transmits the effective data to a carrier recovery module; and the carrier recovery module stores the data after the clock recovery and utilizes the data for carrier recovery. The method adopts a mode of storing first and then treating, and repeatedly utilize limited data between in-phase and anti-phase for the clock recovery and carrier recovery to obtain the calculation effect almost close to the calculation effect of using continuous data so as to realize independent completion of the clock recovery and the carrier recovery for each frame of data.

Description

technical field [0001] The invention relates to the technical field of digital information transmission, in particular to a data-free synchronization method and system for a wireless burst communication all-digital receiver. Background technique [0002] The all-digital receiver was developed vigorously with the progress of semiconductor technology at the end of the 20th century. It uses an analog-to-digital converter to convert the carrier signal into a digital signal at the front end of the receiver, that is, the intermediate frequency, high frequency or near the receiving antenna. The subsequent functions of the receiver are all realized by digital processing technology, and the research on the synchronization algorithm is an important part of the research on the all-digital receiver. In synchronization algorithms, both clock recovery and carrier recovery are mainly divided into two categories: data-assisted and non-data-assisted methods. Gardner proposed a data-free clo...

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Problems solved by technology

However, the traditional Gardner algorithm takes a long time to converge. For the burst communication mode with only a few hundred to a few thousand symbols, it is usually not synchronized at the beginning of the effective reception of data, so it cannot be directly applied and needs to be modified appropriately.

Similarly, the traditional non-data-assisted carrier recovery algorithm is also proposed for the continuous communication mode, and there is also the problem of too long convergence time, which cannot be directly applied to the burst communication mode and needs to be modified appropriately

Therefore, the traditional data-free clock recovery and carrier recovery algorithms cannot be directly applied to the burst communication mode with less data.

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