The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jan. 18, 2011
Filed:
Jul. 30, 2007
Chih-chia Wang, Taichung, TW;
Shu-mei LI, Taipei, TW;
Chingwo MA, Danville, CA (US);
Cen-chieh Huang, Taipei County, TW;
Chih-Chia Wang, Taichung, TW;
Shu-Mei Li, Taipei, TW;
Chingwo Ma, Danville, CA (US);
Cen-Chieh Huang, Taipei County, TW;
Alpha Imaging Technology Corp., Hsin Chu, TW;
Abstract
A null detector and its corresponding method are provided. The null detector includes a power detector, a smoother, and an overlapper. The power detector outputs a power level signal according to the power level of a received signal. The smoother is coupled to the power detector for determining according to the power level signal whether the received signal is transmitting a null symbol, and then the smoother outputs a null detection signal at a first state value or a second state value indicating the result of the determination. The overlapper is coupled to the smoother for providing the duration and position of the null symbols transmitted by the received signal according to the null detection signal.