Time-domain automatic-adaptive equalizer and equalizing method thereof

Abstract

The invention discloses a time-domain automatic-adaptive equalizer and an equalizing method thereof, wherein the time-domain automatic-adaptive equalizer comprises a plurality of equalizing units and is used for equally compensating the same input signal and outputting a plurality of paths of different equalized output signals, wherein every equalizing unit comprises a feedforward filter used for eliminating the front path of an input signal, a feedback filter used for eliminating the back path of an input signal, a decision device, an error generator, a tap coefficient renovator and a combination/selection unit used for selecting or combining a plurality of paths of different equalized output signals, and the formed output signal is the output of the time-domain automatic-adaptive equalizer. The invention differently equalizes the same input signal to output a plurality of paths of different output signals. A plurality of signals are optimized by selecting different equalizing structures and equalizing methods according to the condition of the environment of the actual-used signal path to obtain the equalizing signal of good stability.

Description

technical field [0001] The invention relates to the field of wireless digital communication, in particular to a time-domain self-adaptive equalizer and an equalization method capable of effectively resisting multipath signals. Background technique [0002] The equalizer is a very important component in the practical application of many different digital information such as voice, data and video communication. Equalizers are used as echo cancellers (compensators) for loudspeakers in full-duplex communications, video deghosting in digital television or digital cable transmission, signal conditioners for wireless modems and wireless phones, etc. In the process of signal transmission, due to the existence of multipath signals in the channel, it will bring inter-symbol interference (ISI), and inter-symbol interference is an important cause of errors. In most single-carrier digital applications, the time Domain equalizer to fix ISI errors. In addition, the multipath channel duri...

AI Technical Summary

Problems solved by technology

As can be seen from the above description, although the improved performance is improved to a certain extent, since the input end of the second-stage judgment feedback equalization filter is connected to the output end of the grid decoder, that is to say the output of the second-stage equalizer Restricted by parameters such as the algorithm used by the first-stage equalizer, the length of the forward equalizer filter, etc.

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