Compensation techniques for group delay effects in transmit beamforming radio communication
US7308287B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Jul 14, 2006 |
| Grant date | Dec 11, 2007 |
| Priority date | — |
| Expiry date | Jul 14, 2026 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04B7/0465
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
In a wireless communication device, transmit weights are iteratively processed to compensate for any group delay caused by receive synchronization in the receive device. A transmit matrix of weights is computed from signals transmitted by a second communication device and received at a plurality of antennas of the first communication device. The transmit matrix processing includes normalizing a transmit weight vector with respect to a mode of the transmit weight associated with one of the plurality of antennas. The processed transmit matrix is then applied to a transmit signal to produce a plurality of transmit signals to be simultaneously transmitted from corresponding ones of the plurality of antennas of the first communication device. A plurality of eigenmodes is transmitted accordingly between the two devices in a converging iteration.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.