Pulse or digital communications – Repeaters – Testing
Patent
1995-06-07
1998-08-18
Bocure, Tesfaldet
Pulse or digital communications
Repeaters
Testing
375259, 375219, 455422, H04K 100, H04L 2700, H04L 516
Patent
active
057967725
ABSTRACT:
A technique for spread-spectrum communication which uses more than one mode and more than one frequency band. Selectable modes include narrowband mode and spread-spectrum mode, or cellular mode and microcellular mode. Selectable frequency bands include both licensed and unlicensed frequency bands, particularly frequency bands including the 902-928 MHz, 1850-1990 MHz, and 2.4-2.4835 GHz frequency bands. Spread-spectrum communication channels are 10 MHz or less in width. The frequency band onto which spread-spectrum signals are encoded may be changed upon a change in environment or other control trigger, such as establishment or de-establishment of communication with a private access network. A multi-band transmitter comprises a single frequency synthesizer and a frequency source (e.g., a local oscillator), coupled to a selectable band pass filter. A multi-band receiver capable of monitoring one or more frequency bands comprises bank of bandpass filters and a demodulator comprising a single frequency synthesizer and a frequency source.
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Dixon Robert C.
Smith Douglas G.
Vanderpool Jeffrey S.
Bocure Tesfaldet
Omnipoint Corporation
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