Pre-equalizer for a digitally modulated RF signal and method
US8842720B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 27, 2013 |
| Grant date | Sep 23, 2014 |
| Priority date | — |
| Expiry date | Jun 27, 2033 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L25/49
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
The method comprises receiving an input stream of symbols (x(i)) representing a phase change and magnitude of an RF signal, the magnitudes of the symbols are constant, the phase changes of the symbols encode digital information, and adjust the input stream of symbols to reduce inter-symbol interference. The adjusting iteratively determines a next symbol of the equalized stream (x′(n)) after receiving a next symbol of the input stream (x(n)) by multiplying the next symbol of the input stream (x(n)) with a next adjusting real number (a(n)), multiplying a previous symbol of the input stream (x(n−1)) with a previous adjusting real number (a(n−1)), the previous symbol being received before the next symbol of the input stream, and the next symbol of the equalized stream is computed from the multiplied next symbol and the multiplied previous symbol of the input stream.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.