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:
Dec. 01, 1998
Filed:
Jun. 30, 1995
Richard L Goodson, Huntsville, AL (US);
Mickey C Rushing, Harvest, AL (US);
Gary D Hunt, Gurley, AL (US);
Motorola, Inc., Schaumburg, IL (US);
Abstract
An apparatus and method for a data communications device such as a modem (100, 101) to determine transmit power levels for data transmission and reception, from a received probe signal. The various embodiments utilizing a processor (108) or a digital signal processor (106) receive a probe signal, transmitted at two different power levels, which also typically contains noise and other distortions. The various method and apparatus embodiments then determine average signal levels (501), average noise levels (503), and a set of signal to distortion ratios corresponding to combinations of symbol rates and carrier frequencies. Parameters such as the receive signal power (509), the harmonic content (507), the proportional noise (511), and a signal to distortion ratio threshold (513) are utilized to determine a transmit power level (515).