Decision feedback balancer and receiver

Abstract

Provided are a decision feedback equalizer and receiver. The decision feedback equalizer comprises: a receiving end, a superimposer, an adjustment unit, a first decision device and a second decision device. The receiving end is used for receiving a first differential signal and inputting same into the superimposer; the superimposer is used for superimposing the first differential signal and a square-wave signal output by the adjustment unit so as to obtain a second differential signal; and inputting the second differential signal into the first decision device and the second decision device; the adjustment unit is used for performing phase and / or amplitude adjustment on a second square-wave signal, and inputting the adjusted square-wave signal into the superimposer and the second decision device; the first decision device is used for comparing the voltage amplitude of the second differential signal with a set value, and outputting a first square-wave signal; and the second decision device is used for comparing the voltage amplitude of the second differential signal with that of the signal adjusted by the adjustment unit, and inputting the obtained second square-wave signal into the adjustment unit. The embodiments of the present invention reduce data edge jitter.

Description

technical field [0001] The embodiments of the present invention relate to the technical field of communications, and in particular to a decision feedback equalizer and a receiver. Background technique [0002] With the development of digital signal technology towards high-speed and large-capacity, the demand for high-speed signal processing technology is becoming more and more urgent. Inter Symbol Interference (ISI) generated during signal transmission is a key factor that restricts the increase in signal rate. ISI will cause pulse broadening, resulting in unstable voltage amplitude of the signal, causing jitter of the data edge of the signal, and resulting in channel distortion. Bit Error Ratio (BER) increases. [0003] In the prior art, a differential decision feedback equalizer is used to delay the received differential signal and then feed it back to the receiving end for superimposition with the differential signal received at the receiving end. However, this method wi...

AI Technical Summary

Problems solved by technology

Inter Symbol Interference (ISI) generated during signal transmission is a key factor restricting the increase of signal rate. ISI will cause pulse broadening, resulting in unstable voltage amplitude of the signal, causing jitter of the data edge of the signal, resulting in channel Bit Error Ratio (BER) increases

[0003] In the prior art, the differential decision feedback equalizer is used to delay the received differential signal and then feed it back to the receiving end, which is superimposed with the differential signal received by the receiving end. However, this method will cause large jitter on the data edge

Images