Signal compensation method and device

Abstract

The embodiment of the invention discloses a signal compensation method and a signal compensation device. The method comprises the following steps of: receiving a first signal sequence and a second signal sequence, wherein the second signal sequence is a reverse order sequence of the first signal sequence; performing equalization decision on the first signal sequence and the second signal sequencerespectively by using a decision feedback equalizer (DFE); acquiring a first decision sequence and a second decision sequence; comparing a third decision sequence and a fourth decision sequence one by one; and determining an output decision value according to a comparison result. In the method, a problem in signal compensation is found by comparing decision values obtained after performing the equalization decision on two groups of signal sequences in a positive order and a reverse order by using the DFE and a final output value is determined according to the comparison result, which effectively avoids the situation that a plurality of continuous error results are generated by only compensating an input sequence in the positive order when the signal is compensated by using the DFE in the prior art, and improves the quality of signal compensation.

Description

technical field [0001] The present invention relates to the field of communication technologies, in particular to a signal compensation method and device. Background technique [0002] In high-speed data communication, the high-speed transmission of signals will generate serious inter-symbol interference (ISI inter-symbol interference). Intersymbol interference also exists in wireless communication. For example, there is a serious multipath phenomenon in wireless communication, and the symbol interval is much smaller than the delay spread caused by the multipath effect, which can cause serious ISI. In order to improve communication quality, it is usually necessary to compensate signal distortion caused by ISI, that is, to perform channel equalization. Among various equalization methods, electrical equalization technology is one of the research hotspots in the current communication field. [0003] Decision Feedback Equalizer (DFE, Decision Feedback Equalizer) is the most c...

AI Technical Summary

Problems solved by technology

[0005] The DFE equalizer uses the signal judgment value as feedback. If a signal judgment value is wrong, the wrong signal judgment value will be used in the equalization, which makes the subsequent signal judgment value more error-prone.

Therefore, the judgment results output by the DFE equalizer often show obvious burst characteristics, that is, errors occur in multiple consecutive results.

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