Blind equalization in a single carrier wideband channel
US9559875B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | May 9, 2012 |
| Grant date | Jan 31, 2017 |
| Priority date | — |
| Expiry date | Jul 22, 2032 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L2025/03636
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
A blind equalizer apparatus includes a decision-directed (DD) least mean squares (LMS) blind equalizer. A blind equalizer apparatus includes: a DD LMS blind equalizer, wherein: the blind equalizer uses a finite impulse response filter with tap weights that are adaptively updated using a filter tap update algorithm, wherein blind equalization of one of an in-phase (I) channel and a quadrature (Q) channel is carried out by maximizing the Euclidean distance of binary modulated waveforms, wherein the blind equalizer averages a block to compute an independent phase estimate for a block, wherein the blind equalizer computes an error variable for a block from the phase estimate for the block, wherein the blind equalizer uses the phase estimate and alternating I/Q one dimensional/binary slicing to make a hard decision, and wherein the blind equalizer uses the hard decision to derive an error variable that is used to update the filter tap weights.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.