Patent · US Active

Equalization from presence change transients

US9768985B2 · kind B2 · utility

1Cited by
1References
20Claims
0Family size

Assignee

Inventors

Key dates

Filing dateJan 26, 2016
Grant dateSep 19, 2017
Priority date
Expiry dateJan 26, 2036

Classification

  • Technology area (CPC H)Electricity
  • CPC primaryH04L2025/03802
  • WIPO fieldDigital communication
  • WIPO sectorElectrical engineering

Abstract

An apparatus includes an antenna that is configured to transmit a radio frequency signal across a transmission media having a channel response impairment. A transmission path includes an encoder circuit that encodes data on a carrier signal; and a pre-equalizer circuit that is configured to pre-distort the encoded data according to equalizer coefficients representing the channel response impairment. A first equalization path includes circuitry that generates the equalizer coefficients based upon transients resulting from a presence change event for the carrier signal. A second equalization path includes circuitry that generates the equalizer coefficients based upon knowledge of encoded data on the carrier signal. Selection circuitry selects between the first equalization path and the second equalization path.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.