Wireless communications systems and methods for cache enabled multiple processor based multiple user detection

US7376175B2 · kind B2 · utility

Assignee

• MERCURY COMPUTER SYSTEMS, INC. · US

Inventors

• John H. Oates · Thomasville, US
• Steven R. Imperiali · Endwell, US
• Alden Fuchs · Leesburg, US
• Kathleen J. Jacques · Somerville, US
• Jonathan E. Greene · Great Barrington, US
• William J. Jenkins · Leominster, US
• Frank P. Lauginiger · Francestown, US
• David E. Majchrzak · Merrimack, US
• Paul E. Cantrell · Chelmsford, US
• Mizra Cifric · Brookline, US
• Ian Dunn · Providence, US
• Michael J. Vinskus · Litchfield, US

Key dates

• Filing date: Nov 8, 2002
• Grant date: May 20, 2008
• Expiry date: Mar 1, 2025

Classification

• Technology area (CPC H): Electricity
• CPC primary: H04B2201/70711
• WIPO field: Telecommunications
• WIPO sector: Electrical engineering

Abstract

The invention provides methods and apparatus for multiple user detection (MUD) processing. One aspect of the invention provides a multiprocessor, multiuser detection system for detecting user transmitted symbols in CDMA short-code spectrum waveforms. A first processing element generates a matrix (hereinafter, “gamma matrix”) that represents a correlation between a short-code associated with one user and those associated with one or more other users. A set of second processing elements generates, e.g., from the gamma matrix, a matrix (hereinafter, “R-matrix”) that represents cross-correlations among user waveforms based on their amplitudes and time lags. A third processing element produces estimates of the user transmitted symbols as a function of the R-matrix.