초록 ▼

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, p

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.

대표청구항 ▼

[ What is claimed is:] [1.] An apparatus for receiving spread spectrum signals, comprising:an antenna for receiving a first spread spectrum signal transmitted in a first frequency range and a second spread spectrum signal transmitted in a second frequency range;a frequency synthesizer outputting a p

[ What is claimed is:] [1.] An apparatus for receiving spread spectrum signals, comprising:an antenna for receiving a first spread spectrum signal transmitted in a first frequency range and a second spread spectrum signal transmitted in a second frequency range;a frequency synthesizer outputting a programmable frequency signal having a first frequency;a filter coupled to said spread spectrum signals, said filter selectively outputting a filtered signal, said filtered signal comprising the first frequency range and the second frequency range;a multiplier coupled to said filtered signal and said programmable frequency signal, said multiplier outputting a multiplied signal;a spread spectrum demodulator coupled to said multiplied signal.