Kalman filter based method and apparatus for linear equalization of CDMA downlink channels
US7586982B2 · kind B2 · utility
8Cited by
9References
37Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | May 6, 2003 |
| Grant date | Sep 8, 2009 |
| Priority date | — |
| Expiry date | May 3, 2026 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L2025/03681
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
Disclosed is a minimum mean square error (MMSE) equalizer and method for single-user detection of a signal received from a downlink code-division multiple access CDMA channel. The equalizer includes a Kalman filter having an input coupled to the received signal for generating a best linear unbiased estimate of a transmitted chip sequence for a single user. A reduced computational complexity Kalman filter embodiment is also disclosed that only periodically updates a Kalman filter prediction error covariance matrix P(k|k−1), a Kalman filter filtering error covariance matrix P(k|k) and the Kalman gain K(k).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.