Patent · US Active

Adaptive channel estimation by means of variation of the integration length during the despreading of spread-coded training symbol sequences

US7369602B2 · kind B2 · utility

0Cited by

1References

13Claims

0Family size

Assignee

Infineon Technologies AG · DE

Inventors

Jurgen Niederholz · Kerken, DE
Michael Speth · Krefeld, DE

Key dates

Filing date	Aug 12, 2004
Grant date	May 6, 2008
Priority date	—
Expiry date	Jun 7, 2026

Classification

Technology area (CPC H)Electricity
CPC primaryH04L25/0216
WIPO fieldDigital communication
WIPO sectorElectrical engineering

Abstract

In the method, the received spread-coded signal sequence rk(i) is first of all correlated with the spread-coded training symbol sequence in a correlator (24) so as to counteract the influence of the transmitted training symbols. The signal sequence which results from the correlation process is then despread in a despreading apparatus (21, 22). The despread signal sequence is integrated over a number (N_MF) of signal values, with the number (N_MF) being set as a function of the channel dynamic range (λ). The sequence of data symbols produced in this way is filtered with fixed or variable filter coefficients in a digital filter (25) in order to produce channel estimation values ({tilde over (H)}(l)).

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