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:
May. 01, 2001
Filed:
Mar. 30, 1998
Eugene J. Bruckert, Arlington Heights, IL (US);
Michael D. Kotzin, Buffalo Grove, IL (US);
Motorola, Inc., Schaumburg, IL (US);
Abstract
A mobile subscriber unit (MS) location method and system in a spread spectrum channel coding system uses a known spread spectrum location beacon channel (,) that is time division multiplexed with normal code division multiplexed channels (,). Each base station (,and,) in a defined service area transmits the known time division multiplexed spread spectrum location beacon signal (,), such as a known location channel, as a spread spectrum location beacon signal at a same time interval. Mobile subscriber units (,) receive the spread spectrum location beacon signal (,) time division multiplexed with the normal CDMA channels (,) and determine their own location using location techniques such as trilateration. Preferably, all of a base station's transmit power is assigned to this special known location channel (,) during transmission.