Iterative interference cancellation using mixed feedback weights and stabilizing step sizes

US7711075B2 · kind B2 · utility

Assignee

• Tensorcomm, Incorporated · US

Inventors

• Tommy Guess · Lafayette, US
• Michael L. McCloud · Boulder, US
• Vijay Nagarajan · Boulder, US
• Gagandeep Singh Lamba · Thornton, US

Key dates

• Filing date: Jun 13, 2006
• Grant date: May 4, 2010
• Expiry date: Sep 29, 2028

Classification

• Technology area (CPC H): Electricity
• CPC primary: H04L2025/03375
• WIPO field: Telecommunications
• WIPO sector: Electrical engineering

Abstract

A receiver is configured for canceling intra-cell and inter-cell interference in coded, multiple-access, spread-spectrum transmissions that propagate through frequency-selective communication channels. The receiver employs iterative symbol-estimate weighting, subtractive cancellation with a stabilizing step-size, and mixed-decision symbol estimates. Receiver embodiments may be implemented explicitly in software or programmed hardware, or implicitly in standard Rake-based hardware either within the Rake (i.e., at the finger level) or outside the Rake (i.e., at the user or subchannel symbol level).