Invention Grant
US07804810B2 Circuit, method, and program in a CDMA communication system for quickly tracking a stable path
失效
CDMA通信系统中的电路,方法和程序,用于快速跟踪稳定路径
- Patent Title: Circuit, method, and program in a CDMA communication system for quickly tracking a stable path
- Patent Title (中): CDMA通信系统中的电路,方法和程序,用于快速跟踪稳定路径
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Application No.: US10765124Application Date: 2004-01-28
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Publication No.: US07804810B2Publication Date: 2010-09-28
- Inventor: Koichi Tamura
- Applicant: Koichi Tamura
- Applicant Address: JP Tokyo
- Assignee: NEC Corporation
- Current Assignee: NEC Corporation
- Current Assignee Address: JP Tokyo
- Agency: Foley & Lardner LLP
- Priority: JP2003-019604 20030129
- Main IPC: H04W4/00
- IPC: H04W4/00 ; H04L12/50

Abstract:
A path searching circuit is provided which is capable of searching a stable path. A power delay profile calculated by a powering section using an I component correlation value and a Q component correlation value is input to a power level change monitoring section, where a change in a power level is monitored at a sampling point for each of two or more delay profiles to be used for same power adding processing. With correct signal receiving path timing, stable high correlation values are observed, that is, it is observed that the received power level is small in change. On the other hand, with instantaneously high correlation values caused by noises, it is observed that the received power level is great in change. As a result, in the weighing coefficient controlling section, a weighing coefficient for correlation values providing a great change in a received power level is determined so that the received power level becomes low when power is added and so that weighing control is exercised.
Public/Granted literature
- US20040184411A1 Path searching circuit, path searching method, and path searching program in a CDMA communication system Public/Granted day:2004-09-23
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