Application of multipath combiner and equalizer in a multi-channel direct sequence spread spectrum communication system
US7302023B2 · kind B2 · utility
Inventor
Key dates
| Filing date | Jul 25, 2002 |
| Grant date | Nov 27, 2007 |
| Priority date | — |
| Expiry date | Feb 4, 2025 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L2025/03496
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
A receiver subsystem in a multi-channel direct sequence spread spectrum system consists of a signal register, a multipath detector, a multipath combiner, a decision-feedback equalizer, a multi-channel detector, and a multi-channel signal regenerator. First, the multipath detector finds out the information about various components of a multipath-fading signal. Then the multipath combiner combines the significant components from corresponding tapped outputs of the signal register together. Next the decision-feedback equalizer eliminates interference from the output signal of the multipath combiner. After receiving signal from the decision-feedback equalizer, a multi-channel detection circuit recovers the information and estimates the complex signal for each channel. The multi-channel signal regenerator resorts to these complex signals to generate the estimated transmission signal. It multiplies each estimated complex signal by a corresponding spreading signal, summarize all the products together, and then multiply the summation by a scrambled signal. Finally, the regenerated multi-channel signal and the delayed version of the output signal of the decision feedback equalizer are compa…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.