Channel estimation system and method
US7830994B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 24, 2007 |
| Grant date | Nov 9, 2010 |
| Priority date | — |
| Expiry date | Jul 6, 2029 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L2025/03783
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
Channel estimation for high mobility OFDM channels is achieved by identifying a set of channel path delays from an OFDM symbol stream including carrier data, inter-channel interference noise and channel noise; determining the average channel impulse response for the identified set of channel path delays in each symbol; storing the average channel impulse responses for the identified channel path delays; generating a path delay curvature for each channel path delay in each symbol based on stored average channel impulse responses for the identified channel path delays; estimating the carrier data in the symbols in the OFDM symbol stream in the presence of inter-channel interference noise and channel noise from the OFDM symbol stream and the average impulse responses for the identified channel path delays; reconstructing the inter-channel interference noise in response to the path delay curvature, the identified set of channel path delays and estimated carrier data; and subtracting the reconstructed inter-channel interference noise from the OFDM symbol stream to produce a symbol stream of carrier data and channel noise with suppressed inter-channel interference noise.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.