公开(公告)号：EP2569957A2

公开(公告)日：2013-03-20

申请号：EP11791794.8

申请日：2011-05-05

申请人： Wi-LAN Inc.

发明人： WU, Shiquan ,  SAMARASOORIYA, Vajira

IPC分类号： H04R29/00 ,  H04N17/00

CPC分类号： H04N17/004 ,  H03J1/0091 ,  H04B1/76 ,  H04H60/41 ,  H04H60/43 ,  H04N5/50

摘要： A wireless microphone system broadcasts a pilot tone at the designated ATSC pilot position in the TV Band channel being used by the wireless microphone system. The pilot tone is a readily detectable waveform transmitted in the ATSC pilot position. The pilot tone can be generated by any one of: a standalone pilot tone generator; a pilot tone generator incorporated into a wireless microphone receiver; or, a pilot tone generator incorporated into a wireless microphone.

公开(公告)号：EP2468003A1

公开(公告)日：2012-06-27

申请号：EP10809393.1

申请日：2010-08-18

申请人： Wi-LAN Inc.

发明人： SAMARASOORIYA, Vajira ,  WU, Shiquan

IPC分类号： H04N7/00 ,  H04N17/00

CPC分类号： H04N5/50 ,  H03J1/0091 ,  H04L27/0006 ,  H04N21/42203 ,  H04N21/4345 ,  H04N21/4383 ,  H04W16/14

摘要： A television band device has DTV pilot signal detection logic that generates DTV pilot signal detection decisions associated with a monitored television channel. A wireless microphone detection logic generates wireless microphone detection decisions associated with the monitored television channel. A sensing manager receives DTV pilot signal detection decisions and the wireless microphone detection decisions and analyzes at least one the respective decisions to determine whether the monitored television channel is available white space.

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.

公开(公告)号：EP2384600B1

公开(公告)日：2015-07-01

申请号：EP10735465.6

申请日：2010-01-29

申请人： Wi-LAN Inc.

发明人： SAMARASOORIYA, Vajira ,  WU, Shiquan

IPC分类号： H04W72/04 ,  H04N7/015 ,  H04W88/16

CPC分类号： H04W16/14 ,  H04W4/18 ,  H04W28/06 ,  H04W84/12 ,  H04W88/10

公开(公告)号：EP2384600A1

公开(公告)日：2011-11-09

申请号：EP10735465.6

申请日：2010-01-29

申请人： Wi-LAN Inc.

发明人： SAMARASOORIYA, Vajira ,  WU, Shiquan

IPC分类号： H04W84/12 ,  H04W88/16 ,  H04W72/08 ,  H04N7/015

CPC分类号： H04W16/14 ,  H04W4/18 ,  H04W28/06 ,  H04W84/12 ,  H04W88/10

摘要： A wireless local area network (WLAN) gateway may use a modified LTE radio frame and TV white space spectrum for data communications in a wireless local area network. In the modified LTE downlink frame a predefined subset of the pilot (reference) symbol subcarriers are used to carry information to data sinks in the WLAN.