Invention Grant
- Patent Title: Method and system for using the synchronization channel to obtain measurements in a cellular communications system
- Patent Title (中): 用于使用同步信道在蜂窝通信系统中获得测量的方法和系统
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Application No.: US11566508Application Date: 2006-12-04
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Publication No.: US07675846B2Publication Date: 2010-03-09
- Inventor: Bengt Lindoff , Anders Wallén
- Applicant: Bengt Lindoff , Anders Wallén
- Applicant Address: SE Stockholm
- Assignee: Telefonaktiebolaget L M Ericsson (Publ)
- Current Assignee: Telefonaktiebolaget L M Ericsson (Publ)
- Current Assignee Address: SE Stockholm
- Agent Michael G. Cameron
- Main IPC: H04J11/00
- IPC: H04J11/00

Abstract:
A method and apparatus that utilizes the synchronization channel (SCH) by the user equipment (UE) to obtain time synchronization information and to perform cell search. In order to perform the SCH detection, only a correlation between the known SCH signal and the received sequence is needed, hence the FFT is not involved in the synchronization step. Typically the SCH and pilot symbols are transmitted with a constant power which is the same for all base stations. Hence, based on the serving cell (SC) SCH and pilot symbols, the power relation between these signals is estimated and the ratio applied when performing time synchronization to other cells (i.e. correlation the received sequence with the SCH from that particular NC) to estimate the pilot signal strength for the NB cell.
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