Telecommunications – Receiver or analog modulated signal frequency converter – With wave collector
Patent
1995-11-29
2000-02-08
Eisenzopf, Reinhard J.
Telecommunications
Receiver or analog modulated signal frequency converter
With wave collector
455 673, 455101, 455504, 375347, H04B 708
Patent
active
060236159
ABSTRACT:
A radio subscriber unit (102) has a diversity receiver apparatus (106) including a first antenna (114) and a second antenna (116). A first representation (158) and a second representation (160) of a composite radio frequency (RF) signal are received from the first antenna (114) and the second antenna (116), respectively. The composite radio frequency (RF) signal includes a desired RF signal (156) and interfering signals (166). The desired RF signal (156) includes at least one coded pilot signal (Ec). A ratio (Ec/Io) (142) of the at least one coded pilot signal (Ec) to an estimate of the composite RF signal (Io) is determined responsive to receiving at least one of the first representation of the composite RF signal (158) and the second representation of the composite RF signal (160). A selected state of the first antenna(114) and the second antenna (116) is controlled responsive to at least one of the ratio (Ec/Io) (142) and an integrated received signal strength indication (.intg.RSSI) of the composite RF signal.
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TR 45, Mobil Station--Base Station Compatibility, Standard for Dual--Mode Wideband, Spread Spectrum Cellular System, PN-3118, Feb. 11, 1993, pp. i-xxxiv.
Performance of a Two-Branch Radiotelephone Selection Diversity Receiver by Bruce C. Eastmond and James a. Pautler, Motorola, Inc. Chicago Corp. R & D Center, pp. 164-171.
On The Opptimization Of Simple Switch Diversity Receivers by Mario A. Blanco of the IL Inst. of Tech., and Kenneth Zdunck of Motorola Communication Division, Schaumberg, IL.
Bruckert Eugene J.
Vilmur Richard Joseph
Bartusiak Paul J.
Eisenzopf Reinhard J.
Kaschke Kevin D.
Kincaid Lester G.
Motorola Inc.
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