Cyclic shift selection for MIMO narrowband power line communications
US9184794B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 29, 2014 |
| Grant date | Nov 10, 2015 |
| Priority date | — |
| Expiry date | Dec 29, 2034 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L1/188
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
A PLC network system and method operative with OFDM for generating MIMO frames with suitable preamble portions configured to provide backward compatibility with legacy PLC devices and facilitate different receiver tasks such as frame detection and symbol timing, channel estimation and automatic gain control (AGC), including robust preamble detection in the presence of impulsive noise and frequency-selective channels of the PLC network. A MIMO PLC transmitter device may selectively vary amounts of cyclic shift (CS) for different transmit phases based on whether an initial CS vector elicits an ACK signal back from a PLC receiver within a timeout period.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.