公开(公告)号：US08537223B1

公开(公告)日：2013-09-17

申请号：US13758059

申请日：2013-02-04

Applicant: Google Inc.

Inventor： C. Philip Gossett ,  Jeremy Thorpe ,  Bob D. Nuckolls

IPC: H04N17/02

CPC classification number: H04N17/04 ,  H04B17/26 ,  H04B17/327

Abstract: Systems, methods, and devices for reducing interference with digital television transmissions occurring over a bandwidth are disclosed. The digital television signal is correlated to a reference digital television field sync signal. A non-coherent correlation power measurement is determined based on the correlation of the received digital television signal to the reference digital television field sync signal. A plurality of maximum non-coherent correlation power measurements are determined over multiple field times. An energy estimate for the digital television transmission is determined based on the maximum non-coherent correlation power measurements. A transmit mask filter is generated based on the energy estimate. The transmit mask is applied to transmissions to reduce interference with detected digital television transmissions.