Systems and methods for improving range for multicast wireless communication
US7570921B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | May 27, 2004 |
| Grant date | Aug 4, 2009 |
| Priority date | — |
| Expiry date | Sep 19, 2026 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04W52/42
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
Methods to optimize range of multicast signal communication in wireless communication applications that use range-enhanced techniques for directed signal communication. A multicast signal may be sent multiple times through each of a plurality of independent omnidirectional transmit antennas of a communication device to a plurality of other communication devices to improve packet error rate (PER) at a given range (i.e., SNR). More generally, the multicast message can be transmitted up to N times using up to N times using any set of N complex linearly independent N-dimensional transmit weight vectors vi, . . . , vN associated with N plurality of transmit antennas that meets the power constraint ∥vi∥2=1, i=0, . . . , N−1, where the vector vi, is used for the ith transmission of the multicast signal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.