公开(公告)号：EP2484108A1

公开(公告)日：2012-08-08

申请号：EP10819763.3

申请日：2010-09-29

申请人： WI-LAN, Inc.

发明人： BIRKETT, Neil ,  WU, Shiquan

IPC分类号： H04N5/44 ,  H04N5/50

CPC分类号： H04H40/18 ,  H04B1/0064 ,  H04H2201/60 ,  H04L25/0278 ,  H04N21/4263 ,  H04N21/6112

摘要： A radio frequency front end for a television band receiver and spectrum sensor includes a first plurality of adaptive matching networks connected to a signal summer that combines signals received by the first plurality of antennas respectively connected to the first plurality of adaptive matching networks and outputs a combined signal to each of a second plurality of downconverter/tuners. The downconverter/tuners are respectively or collectively connected to an analog to digital converter that converts output of the second plurality of downconverter/tuners into at least one digital signal that is output to the television band receiver and spectrum sensor.

公开(公告)号：EP2661920A1

公开(公告)日：2013-11-13

申请号：EP12732176.8

申请日：2012-01-06

申请人： Wi-LAN Inc.

发明人： SAMARASOORIYA, Vajira ,  BIRKETT, Neil ,  MOHER, Michael ,  YEE, Jung

IPC分类号： H04W16/14 ,  H04B7/00 ,  H04N7/08 ,  H04R1/08 ,  H04R3/00 ,  H04W72/04

CPC分类号： H04W16/14 ,  H04B1/18 ,  H04B17/26 ,  H04B17/336 ,  H04B17/345 ,  H04B17/373 ,  H04L27/0006 ,  H04W24/00 ,  H04W28/04 ,  H04W72/00

摘要： A spectrum sensor detects the presence of incumbent signals in the television-band. The spectrum sensor can detect digital Advanced Television Systems Committee (ATSC) signals below a −114 dBm signal level and wireless microphone signals below a −110 dBm signal level with false detection rates less than 10%. A radio module receives radio-frequency signals and produces an intermediate-frequency signal reflecting signal received in a selected television channel. A baseband processor module receives the intermediate-frequency signal, digitizes it, and processes the digital data to detecting whether an incumbent signal is present in the selected channel. The processing may include using pilot detection based on power spectrum thresholding or statistic characteristic extraction to detect ATSC signals. The processing may also include using power spectrum thresholding or covariance based signal detection to detect wireless microphone signals.