EP 0895678 A2 19990210 - METHOD AND APPARATUS FOR ANTENNA REALIGNMENT IN A MOBILE RADIOTELEPHONE USING AN INJECTED AUDIO SIGNAL
Title (en)
METHOD AND APPARATUS FOR ANTENNA REALIGNMENT IN A MOBILE RADIOTELEPHONE USING AN INJECTED AUDIO SIGNAL
Title (de)
VERFAHREN UND VORRICHTUNG ZUR ANTENNENAUSRICHTUNG IN EINEM MOBILEN FUNKTELEFON DURCH EINWURF EINES AUDIOSIGNALS
Title (fr)
PROCEDE ET SYSTEME DE REALIGNEMENT D'ANTENNES D'UN RADIOTELEPHONE MOBILE AU MOYEN D'UN SIGNAL AUDIO INJECTE
Publication
Application
Priority
- US 9703558 W 19970307
- US 61549796 A 19960312
Abstract (en)
[origin: WO9734381A2] A mobile radiotelephone injects an audible alignment signal which is a function of the orientation of the radiotelephone antenna, into the audible radiotelephone communications. The audible alignment signal prompts the radiotelephone user to reorient the radiotelephone antenna for improved alignment with the source of radiotelephone communications. The audible alignment signal is preferably a function of the received signal strength of the radiotelephone communications. The audible alignment signal is preferably artificial noise which is injected in the radiotelephone loudspeaker along with the radiotelephone communications signal, to thereby restore subjective graceful degradation behavior to the received radiotelephone communications. Artificial noise injection is preferably used with coded digital radiotelephone systems which do not audibly degrade until a threshold is reached, below which communications are suppressed. Artificial noise injection may also be used with variable power base stations.
IPC 1-7
IPC 8 full level
H01Q 3/02 (2006.01); H01Q 1/24 (2006.01); H04B 1/10 (2006.01); H04B 1/18 (2006.01); H04B 1/40 (2006.01); H04B 7/26 (2006.01); H04B 17/00 (2006.01)
CPC (source: EP KR)
H04B 17/00 (2013.01 - KR); H04B 17/23 (2015.01 - EP); H04B 17/318 (2015.01 - EP); H04B 1/1027 (2013.01 - EP)
Citation (search report)
See references of WO 9734381A2
Designated contracting state (EPC)
BE DE FI FR GB IT SE
DOCDB simple family (publication)
WO 9734381 A2 19970918; WO 9734381 A3 19971106; AU 2071697 A 19971001; AU 722052 B2 20000720; BR 9708051 A 19990727; CN 1135755 C 20040121; CN 1213471 A 19990407; EP 0895678 A2 19990210; JP 2000506699 A 20000530; KR 100349192 B1 20021226; KR 19990087680 A 19991227
DOCDB simple family (application)
US 9703558 W 19970307; AU 2071697 A 19970307; BR 9708051 A 19970307; CN 97193004 A 19970307; EP 97908929 A 19970307; JP 53269497 A 19970307; KR 19980707145 A 19980910