Patent · US Active

Coherent transmission from distributed wireless transmitters using legacy receivers

US9203480B2 · kind B2 · utility

2Cited by

5References

18Claims

0Family size

Assignee

Massachusetts Institute of Technology · US

Inventors

Hariharan Rahul · Cambridge, US
Swarun Suresh Kumar · Cambridge, US
Dina Katabi · Cambridge, US

Key dates

Filing date	Oct 5, 2012
Grant date	Dec 1, 2015
Priority date	—
Expiry date	Jan 21, 2033

Classification

Technology area (CPC H)Electricity
CPC primaryH04L25/0204
WIPO fieldTelecommunications
WIPO sectorElectrical engineering

Abstract

A distributed wireless communication system includes multiple access points, each with one or more antennas. The access points do not necessarily have synchronized transmitting and receiving radio frequency oscillators. Approaches to channel estimation between the access points and one or more wireless clients account for the lack of synchronization, and do not necessarily require capabilities at the clients that go beyond required or optional features of standard wireless Ethernet (e.g., 802.11n, 802.11g, or 802.11a), thereby supporting “legacy” clients while supporting high data throughput approaches that provide coherent transmission from the multiple antenna of the access points.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.