Method and apparatus for configuring a rake receiver

US7184462B1 · kind B1 · utility

Assignee

• Telefonaktiebolaget LM Ericsson (Publ) · SE

Inventors

• Roozbeh Atarius · San Diego, US
• Torsten Carlsson · Lund, SE
• H{dot over (a)}kan B. Eriksson · Bissenkamp, SE
• Kjell Gustafsson · Lund, SE
• Torgny Palenius · Barsebäck, SE
• Christer Östberg · Staffanstorp, SE

Key dates

• Filing date: Dec 4, 1998
• Grant date: Feb 27, 2007
• Expiry date: May 5, 2021

Classification

• Technology area (CPC H): Electricity
• CPC primary: H04B1/7093
• WIPO field: Telecommunications
• WIPO sector: Electrical engineering

Abstract

A searcher uses an input signal, and for example, a matched filter to generate a first set of candidate paths. A selector uses the input signal and the first set of candidate paths to generate a second set of paths. The second set of paths is used to configure the fingers of a RAKE receiver. According to one aspect of the invention, the first set of candidate paths contains M paths, and the second stage uses M correlators to generate a set of M correlation values. The second stage uses the M correlation values to select N paths that are used to configure the N fingers of the RAKE receiver. According to another aspect of the invention, the first set of candidate paths contains M paths, and the second stage uses a multiple of M correlators to track the M paths and generate a set of M estimates. The second stage uses the M estimates to select N paths that are used to configure the N fingers of the RAKE receiver. According to another aspect of the invention, the selector can generate new sets of N paths while the searcher is either active or inactive. The receiver can use a quality signal or a counter to notify the searcher and/or the selector to generate new sets of paths. The selecto…