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. 07, 2002
Filed:
Feb. 18, 1999
Applicant:
Inventors:
Esa Malkamaki, Espoo, FI;
Lauri Oksanen, Helsinki, FI;
Assignee:
Nokia Mobile Phones Limited, Espoo, FI;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H04B 7/212 ;
U.S. Cl.
CPC ...
H04B 7/212 ;
Abstract
Mobile communications apparatus ( ) are arranged to transmit encoded speech in accordance with a first protocol and to transmit extended data in accordance with a second protocol. A wideband extension ( ) is divided into time slots (TN -TN ) which are substantially in phase with time slots for speech transmission. Signalling channels provided for speech are also used for establishing data calls within the extension. Extended data is conveyed by a process of orthogonal frequency division multiplexing is created ( ). The multiplex is created by an inverse fast Fourier transform ( ) and the transmission frequencies undergo a hopping sequence.