Telecommunications – Carrier wave repeater or relay system – Directive antenna
Reexamination Certificate
2011-06-28
2011-06-28
Appiah, Charles N (Department: 2617)
Telecommunications
Carrier wave repeater or relay system
Directive antenna
C455S403000, C455S414100, C455S562100, C370S203000, C370S339000
Reexamination Certificate
active
07970348
ABSTRACT:
A solution is disclosed for minimizing the amount of hardware and hardware accuracy requirements to simultaneously give the feature of both cell and narrow beams transmission, while enabling methods for capacity/coverage increase. The main property utilized by the present invention for maintaining cell-coverage pattern control, when radiating information in two simultaneous beams, is to use orthogonal polarization states for the two beams. The two orthogonal polarization states may for instance constitute linear polarization slanted at +45° and −45°, respectively. The dedicated broadcast transmission needs to be conveyed defining the total cell coverage area. The total cell coverage area is matched by the coverage of the two fixed narrow-beams. The broadcast signal transmission is divided into two signal streams/paths, one for each of the two fixed narrow-beams (no coherency requirements existing between the two parallel signal streams/paths). The two broadcast signal streams/paths are combined by means of combiner units with the dedicated combined signals from all fixed narrow-beam selected users in each of the two branches. The signals to the two antennas are then transmitted having an orthogonal polarization.
REFERENCES:
patent: 5649287 (1997-07-01), Forssen et al.
patent: 5933421 (1999-08-01), Alamont
patent: 5966094 (1999-10-01), Ward et al.
patent: 6006069 (1999-12-01), Langston
patent: 6094165 (2000-07-01), Smith
patent: 6101174 (2000-08-01), Langston
patent: 6218987 (2001-04-01), Derneryd et al.
patent: 6788250 (2004-09-01), Howell
patent: 6982968 (2006-01-01), Barratt et al.
patent: 7019710 (2006-03-01), Shurvinton et al.
patent: 7027837 (2006-04-01), Uhlik et al.
patent: 07796024 (1997-09-01), None
patent: 0895436 (1999-02-01), None
patent: WO 95-34102 (1995-12-01), None
patent: WO 9534102 (1995-12-01), None
patent: WO 01/89030 (2001-11-01), None
patent: WO 02/32013 (2002-04-01), None
PCT Written Opinion for PCT/SE02/01983.
International Search Report for PCT/SE02/01983.
EP Communication Pursuant to Article 94(3) EPC mailed Jan. 3, 2008 in corresponding EP Application 02780243.8.
English translation of the Second Chinese Office Action mailed May 23, 2008 in corresponding Chinese application 02823775.7.
Chinese Patent Office action mailed Apr. 3, 2009 for corresponding Chinese patent application 02823775.7.
EP Communication mailed Jan. 4, 2010 in corresponding EP application 02780243.8.
Indian First Examination Report mailed Apr. 30, 2010 in corresponding Indian application 1378/DELNP/2004.
Hagerman Bo
Johannison Bjorn Gunnar
Appiah Charles N
Holliday Jaime M
Nixon & Vanderhye P.C.
Telefonaktiebolaget LM Ericsson (publ)
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