The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jul. 13, 1993
Filed:
Nov. 17, 1992
Lars G Larsson, Bromma, SE;
Telefonaktiebolaget L M Ericsson, Stockholm, SE;
Abstract
Symbol sequences having synchronization sequences are transmitted over a radio channel. Received signals are sampled in signal sampling time points (n) and by correlation a channel response (C.sup.2) is obtained. The impulse response is sampled (T.sub.s) over a period (M.times.N) corresponding to time dispersion of the channel. For separate samples with separate start points (n), channel estimates are obtained (n=0, 2, 4, 6, N=1, 3, 5, 7. . .) whose energy values are calculated, and the estimate (n=8, 10, 12, 14) with the largest energy is selected. The first time point (n=8) in this estimate is selected as sampling time point for the symbol sequence. Alternatively, the signal sampling time point (n=9) with maximum energy value (C.sup.2 max) is selected. By comparing the energy values either one of these signal sampling time points (n=8 , n=9) can be selected as the sampling time point for the symbol sequence. For consecutive sequences, an average value for the sampling time points is calculated.