Patent · US Active

Channel response calculation in an OFDM receiver

US8040962B2 · kind B2 · utility

1Cited by

0References

1Claims

0Family size

Assignee

Entropic Communications, LLC · US

Inventors

Wee Peng Goh · Murrieta, US
Jason Beck · Peoria, US
Raja Gosula · Salvador, BR

Key dates

Filing date	Jul 15, 2008
Grant date	Oct 18, 2011
Priority date	—
Expiry date	Apr 3, 2030

Classification

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

Abstract

An efficient algorithm is described for use with OFDM receivers that characterizes the impulse response of a communication channel using frequency domain techniques that reduce computational and memory requirements, relative to time-domain cross-correlation methods, without sacrificing algorithm performance. An FFT engine is used to transform a time domain input sequence, the transformed sequence is multiplied by the conjugate of the expected sequence, the product of several sequences is averaged, then the FFT engine transforms the average back to a time domain sequence, the magnitude of which is the impulse response of the channel.

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