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:
Sep. 21, 2010
Filed:
Jun. 13, 2002
Yonggang Du, Shanghai, CN;
LI Sun, Shanghai, CN;
Yonggang Du, Shanghai, CN;
Li Sun, Shanghai, CN;
ST-Ericsson SA, Geneva, CH;
Abstract
A time reference point can be determined in a radio system by sending a synchronization sequence s(i), i=0, . . . N−1, from transmitter X,to receiver Y,and by detecting the peak value at the output of a matched-filter,h(i)=s(N−1-i) on Y. In practical systems the accuracy of this peak detection is limited by interference and noise on the radio channel. To increase the peak detection accuracy, we propose to repeat the transmission of the same synchronization sequence K times. The interval L between repetitions is constant and the amplitude of the synchronization sequence in each repetition varies according to a given variation pattern a(jL), j=0, . . . , K−1. The receiver Y,knows L and a(jL), j=0, . . . , K−1. After comparison to a threshold, the matched-filterat the receivermay deliver peaks resulted from repeatedly received synchronization sequences or peaks caused by interference and/or noise.