Parameter estimator configured to distinguish between peaks and sidelobes of correlation function

US7308022B2 · kind B2 · utility

Inventors

• Roland Rick · Superior, US
• Messay Amerga · San Diego, US
• Jeremy M. Stein · Haifa, IL
• Ivan Fernandez-Corbaton · Lleida, ES

Key dates

• Filing date: Jan 29, 2002
• Grant date: Dec 11, 2007
• Expiry date: Mar 4, 2024

Classification

• Technology area (CPC H): Electricity
• CPC primary: H04B1/7117
• WIPO field: Measurement
• WIPO sector: Instruments

Abstract

A parameter estimator for estimating one or more parameter(s) from a signal is described. A correlation function is derived from the signal, and the correlation function analyzed to determine if one or more first peak(s) are present, and, if so, distinguishable from the sidelobe(s) of a second peak. If the one or more first peak(s) are present and distinguishable from the sidelobe(s) of the second peak, the one or more parameter(s) are estimated from the one or more first peak(s). If the one or more first peak(s) are not present, or, if present, are not distinguishable from the sidelobe(s) of the second peak, the one or more parameter(s) are estimated from the second peak. The parameter estimator may be employed in a subscriber station to estimate a parameter such as the time of arrival of one or more base station or sector pilot signals in a wireless communication system. This information may be utilized in an overall advanced forward link trilateration (AFLT) process for estimating the location of the subscriber station.