Patent · US Active

Channel estimation

US7961795B2 · kind B2 · utility

2Cited by

4References

11Claims

0Family size

Assignee

Telefonaktiebolaget LM Ericsson (Publ) · SE

Inventors

Zesong Fei · Beijing, CN
Lei Wan · Beijing, CN
Jingming Kuang · Beijing, CN

Key dates

Filing date	Oct 29, 2004
Grant date	Jun 14, 2011
Priority date	—
Expiry date	Dec 11, 2026

Classification

Technology area (CPC H)Electricity
CPC primaryH04L25/03324
WIPO fieldDigital communication
WIPO sectorElectrical engineering

Abstract

The channel estimation for a current data block is based on a previous data block, where the two data blocks are based on common information. Data symbol hypotheses of the previous data block can be forwarded to a channel estimator and used as known reference symbols when estimating the channel response for the current block. Alternatively, a combination of the data symbol hypotheses and preliminary data symbol estimates of the current block are used as reference symbols in a refined channel estimation for the current block. Data bit hypotheses of the previous block can also be input as a priori data in a preliminary demodulation of the current block. The demodulator output is used as reference data in a refined channel estimation for the current block. The technology is well-adapted for use in connection with Hybrid ARQ.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.