Patent · US Active

Methods and systems for combined cyclic delay diversity and precoding of radio signals

US8068555B2 · kind B2 · utility

43Cited by

0References

35Claims

0Family size

Assignee

Telefonaktiebolaget LM Ericsson (Publ) · SE

Inventors

George Jöngren · Sundbyberg, SE
Bo Göransson · Sollentuna, SE

Key dates

Filing date	Feb 12, 2008
Grant date	Nov 29, 2011
Priority date	—
Expiry date	Dec 6, 2029

Classification

Technology area (CPC H)Electricity
CPC primaryH04L27/2647
WIPO fieldTelecommunications
WIPO sectorElectrical engineering

Abstract

In a transmitter or transceiver, signals can be precoded by multiplying symbol vectors with various matrices. For example, symbol vectors can be multiplied with a first column subset of unitary matrix which spreads symbols in the symbol vectors across virtual transmit antennas, a second diagonal matrix which changes a phase of the virtual transmit antennas, and a third precoding matrix which distributes the transmission across the transmit antennas.

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