Iterative timing deviation estimation method based on symmetric binary search successive approximation principle

Abstract

An iterative timing deviation estimation method based on the symmetric binary search successive approximation principle comprises the following steps: generating two residual timing deviation pre-estimated values which are opposite to each other according to a first preset rule; respectively adopting the two residual timing deviation pre-estimated values to carry out timing deviation correction on the burst signal frame to obtain two different correction results; judging the validity of the two residual timing deviation pre-estimated values according to a second preset rule, and further screening out an effective residual timing deviation pre-estimated value and an effective correction result; updating the cumulative estimation value of the timing deviation by using the effective residual timing deviation pre-estimation value; and finally, taking an effective correction result as input, and iteratively executing the operation until the iteration operation of a set number of times is completed. The method is a blind estimation method, does not need pilot assistance, only needs to use enough symbols, and can still obtain good estimation performance even under the conditions of low-power oversampling and low signal-to-noise ratio.

Description

technical field [0001] The invention relates to a parameter estimation technology in communication technology, in particular to an iterative timing deviation estimation method based on a symmetrical half-search successive approximation principle. Background technique [0002] As one of the important functions of an all-digital communication receiver, symbol synchronization is responsible for accurately recovering useful data symbols from received signals with timing deviations. A typical symbol synchronization method is as follows: firstly, a certain statistical estimation method is used to directly estimate the timing deviation of the symbol; then, the timing deviation of the symbol is corrected according to the estimated value of the timing deviation. Therefore, the pros and cons of timing offset estimation methods will have a direct impact on the performance of symbol synchronization. [0003] In burst communication, the sending time of burst signal is random, which lead...

AI Technical Summary

Problems solved by technology

However, because the burst signal frame is usually short and contains few pilot symbols, it is difficult for data-assisted timing offset estimation methods to achieve good estimation results

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