A simple self-adaptive improvement method of a timing error discriminator

Abstract

The invention provides a simple self-adaptive improvement method of a timing error discriminator, which is characterized by comprising the following steps of: (1) a loop convergence stage; Step (2), aloop stable tracking stage: the robustness of the loop to the signal intensity change is enhanced by utilizing simple normalization processing, and meanwhile, the direct estimation of a real error isalso obtained; And the treatment is simple, so that the method has very high feasibility in engineering practice.

Description

technical field [0001] The invention relates to the field of digital communication, in particular to a simple self-adaptive improvement method for a Gardner bit timing error discriminator. Background technique [0002] In a digital communication system, the signal transmission delay and the clocks at both ends of the transceiver are not synchronized, resulting in the need to recover bit timing information at the receiving end to ensure good bit error performance of the communication system. Bit synchronization technology is the key technology to realize this requirement, among which Gardner bit synchronization algorithm is a classic digital timing synchronization control method. The method utilizes a similar phase-locked loop technology to track and lock the bit timing moment in real time by means of a loop, and bit timing error estimation is an important link. [0003] A typical Gardner timing error estimation algorithm uses symbol waveform detection to obtain bit timing d...

AI Technical Summary

Problems solved by technology

[0003] A typical Gardner timing error estimation algorithm uses symbol waveform detection to obtain bit timing deviation information, which makes the estimated value affected by symbol waveform shape and signal strength, too large or too small will cause bit timing tracking loop failure Unstable, even leading to out-of-lock divergence, so this typical algorithm is more sensitive to signal strength

Images