Interference cancellation and receive diversity for single-valued modulation receivers
US7949304B2 · kind B2 · utility
Assignees
Inventors
Key dates
| Filing date | Nov 10, 2008 |
| Grant date | May 24, 2011 |
| Priority date | — |
| Expiry date | Nov 10, 2028 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L25/03
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
A combined SAIC receiver and a multiple-antenna, receive diversity receiver are employed to reduce interference in a wireless system. The real and imaginary parts of the de-rotated signal for each receive path associated with an antenna are separately filtered and a combined output signal of all receive paths is generated. The weighting coefficients are adjusted based on an error signal produced by comparing the combined output signal with a reference signal. The weighting coefficients are initially set based on an MMSE/LS type of signal processing criteria, where the reference signal is the Training Sequence Code (TSC). Subsequent adjustment/tracking can be accomplished by using known tracking algorithms, e.g. LMS or RLS, or the coefficients can be re-computed using MMSE/LS processing. The reference signal for tracking may be a combination of the TSC and estimated data symbols provided by an equalizer.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.