Wireless Facilities, Inc.

Chi Nche

Ulun Karacaoglu

Masood K Tayebi

Baya Hatim

Ismail Lakkis

Saeid Safavi

Deirdre O'Shea

Cathal O'Scolai

Joseph J Roy

Hoang Xuan Bui

A system and method for converting carrier frequencies of a wireless communication system is provided. The system and method allow expansion of coverage areas of wireless communication systems, such as a mobile/cellular telephone system. In one embodiment, the system converts RF signals in the PCS band to ISM band, and transmits the ISM signals to a distant repeater station. The repeater station receives the ISM signals and down converts the ISM signals to the PCS band. The PCS signals are retransmitted in a new cell thereby creating a new coverage area. Radio frequency signals are down converted to an Intermediate frequency for channel selectivity and narrow band filtering. Channel selectivity circuitry allows quick reuse of other channels in the same cell. The channel selectivity circuitry includes a SAW filter which significantly reduces out of band interference. The system includes a microcontroller to permit use of programmable synthesized sources for the local oscillators thereby facilitating a variety of communication bands to be utilized in the system.

Universal repeater for communication systems

A system and method for converting carrier frequencies of a wireless communication system is provided. The system and method allow expansion of coverage areas of wireless communication systems, such as a mobile/cellular telephone system. In one embodiment, the system converts RF signals in the PCS band to ISM band, and transmits the ISM signals to a distant repeater station. The repeater station receives the ISM signals and downconverts the ISM signals to the PCS band. The PCS signals are retransmitted in a new cell thereby creating a new coverage area.

Inter-band communication repeater system

A system and method for communication of radio frequency (RF) signals over multimedia signal paths. The invention provides a wireless multimedia carrier (WMC) system capable of receiving a variety of standardized input signals, such as DS0/E0, T1/E1, T2/E2, and/or T3/E3 for transmission using RF channels. The WMC system selectively employs time division multiple access (TDMA) and/or code division multiple access (CDMA) technology. The WMC system transmits the various signal inputs using RF carriers, receives the transmitted signals, and converts the signals to the desired signaling scheme (standard) for forwarding to intended destinations.

Wireless multimedia carrier system

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San Diego, CA, United States of America

Chi Nche