Invention Grant
- Patent Title: Adaptive pilot filter for a wireless communication system
- Patent Title (中): 用于无线通信系统的自适应导频滤波器
-
Application No.: US11761329Application Date: 2007-06-11
-
Publication No.: US07583756B2Publication Date: 2009-09-01
- Inventor: Parvathanathan Subrahmanya , Da-shan Shiu , Avneesh Agrawal
- Applicant: Parvathanathan Subrahmanya , Da-shan Shiu , Avneesh Agrawal
- Applicant Address: US CA San Diego
- Assignee: Qualcomm Incorporated
- Current Assignee: Qualcomm Incorporated
- Current Assignee Address: US CA San Diego
- Agent Kenneth K. Vu; Larry J. Moskowitz
- Main IPC: H04L27/00
- IPC: H04L27/00 ; H04B1/10 ; H04L23/00

Abstract:
Techniques to filter pilot symbols for a pilot in an “adaptive” manner to provide an improved estimate of the response of a communication channel. A received signal may experience different channel conditions at different times, and different multipaths may also experience different channel conditions even when received close in time. A pilot filter with an adaptive response is used to provide an improved estimate of the channel response. Various adaptive pilot filtering schemes may be used. In a first scheme, the channel conditions are estimated based on the quality of the received pilot. In a second scheme, the channel conditions are estimated based on the quality of the pilot estimates (i.e., the filtered pilot symbols). For each scheme, a particular filter response is selected based on the estimated quality of either the received pilot or the pilot estimates.
Public/Granted literature
- US20070230544A1 ADAPTIVE PILOT FILTER FOR A WIRELESS COMMUNICATION SYSTEM Public/Granted day:2007-10-04
Information query