Method and apparatus for improving communication system performance in Tomlinson Harashima Precoding (THP) mode with a zero edge filter
US8340171B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 9, 2009 |
| Grant date | Dec 25, 2012 |
| Priority date | — |
| Expiry date | Aug 9, 2031 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L25/4975
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
An improved Tomlinson Harashima Precoding (THP) communication system through special configuration of its feedback coefficients is disclosed. Improvement, in terms of THP system robustness against analog-to-digital (ADC) sampling phase variation, is achieved either by deriving feedback coefficients of the Decision Feedback Equalizer at worst ADC sampling phase or by inserting a Zero Edge Filter (ZEF) at the receiver. The ZEF modifies the communication system such that the feedback filter coefficients derived in the Decision Feedback Equalizer (DFE) mode and later used in the THP mode is capable to compensate the zero at Nyquist Frequency due to a non-optimum sampling, phase of the ADC. The THP communication system, modified and improved with the insertion of ZEF, is operable to switch from an adaptive Decision Feedback Equalizer (DFE) mode to a THP mode having an adaptive Linear Equalizer (LE) at the receiver.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.