Abstract: A non-ferromagnetic electronic circulator device and system is described. Such passive electronic circulator devices may include a plurality of ports that include a discrete arrangement of resistors, capacitors and inductors that form a fully connected S parameter matrix. Signals that enter a first port of the circulator only exit from the second port, signals entering the second port only exit from the third port, signals entering the third port only exit the fourth port, and signals entering the fourth port, only exit the first port.

Abstract: A non-ferromagnetic electronic circulator device and system is described. Such passive electronic circulator devices may include a plurality of ports that include a discrete arrangement of resistors, capacitors and inductors that form a fully connected S parameter matrix. Signals that enter a first port of the circulator only exit from the second port, signals entering the second port only exit from the third port, signals entering the third port only exit the fourth port, and signals entering the fourth port, only exit the first port.

Abstract: Embodiments of the invention provide for methods and apparatus for fragmenting a single message and sending the message fragments over multiple independent networks to a single receiving unit. The receiving unit then reassembles the message fragments to generate the original message. One embodiment of an apparatus according to the invention is a wireless radio frequency modem that can both receive and transmit fragmented messages over multiple independent networks.

Abstract: Embodiments of the invention provide for methods and apparatus for fragmenting a single message and sending the message fragments over multiple independent networks to a single receiving unit. The receiving unit then reassembles the message fragments to generate the original message. One embodiment of an apparatus according to the invention is a wireless radio frequency modem that can both receive and transmit fragmented messages over multiple independent networks.

Abstract: Embodiments of the invention provide for methods and apparatus for fragmenting a single message and sending the message fragments over multiple independent networks to a single receiving unit. The receiving unit then reassembles the message fragments to generate the original message. One embodiment of an apparatus according to the invention is a wireless radio frequency modem that can both receive and transmit fragmented messages over multiple independent networks.

Abstract: Embodiments of the invention provide for methods and apparatus for fragmenting a single message and sending the message fragments over multiple independent networks to a single receiving unit. The receiving unit then reassembles the message fragments to generate the original message. One embodiment of an apparatus according to the invention is a wireless radio frequency modem that can both receive and transmit fragmented messages over multiple independent networks.

Abstract: The present invention provides for a wireless radio frequency (“RF”) modem that plugs into a host computer and shares a central processing unit and memory with the host computer, wherein principal modem functions are distributed between the modem and the host computer. In one embodiment, the modem performs RF conversion, and the host computer performs baseband processing and protocol stack control. In another embodiment, the modem performs RF conversion and baseband processing, and the host computer performs protocol stack control.

Abstract: The present invention provides for methods and apparatus for fragmenting a single message and sending the message fragments over multiple independent networks to a single receiving unit. The receiving unit then reassembles the message fragments to generate the original message. The preferred apparatus embodiment is a wireless radio frequency modem that can both receive and transmit fragmented messages over multiple independent networks.

Abstract: The present invention provides for a wireless radio frequency (“RF”) modem that plugs into a host computer and shares a central processing unit and memory with the host computer, wherein principal modem functions are distributed between the modem and the host computer. In one embodiment, the modem performs RF conversion, and the host computer performs baseband processing and protocol stack control. In another embodiment, the modem performs RF conversion and baseband processing, and the host computer performs protocol stack control.

Abstract: The present invention provides for a wireless radio frequency (“RF”) modem that plugs into a host computer and shares a central processing unit and memory with the host computer, wherein principal modem functions are distributed between the modem and the host computer. In one embodiment, the modem performs RF conversion, and the host computer performs baseband processing and protocol stack control. In another embodiment, the modem performs RF conversion and baseband processing, and the host computer performs protocol stack control.

Abstract: The present invention provides for methods and apparatus for fragmenting a single message and sending the message fragments over multiple independent networks to a single receiving unit. The receiving unit then reassembles the message fragments to generate the original message. The preferred apparatus embodiment is a wireless radio frequency modem that can both receive and transmit fragmented messages over multiple independent networks.

Abstract: The present invention provides for a wireless radio frequency (“RF”) modem that plugs into a host computer and shares a central processing unit and memory with the host computer, wherein principal modem functions are distributed between the modem and the host computer. In one embodiment, the modem performs RF conversion, and the host computer performs baseband processing and protocol stack control. In another embodiment, the modem performs RF conversion and baseband processing, and the host computer performs protocol stack control.

Abstract: The invention is a method of correcting distortion in a power amplifier in a transmitter. The method includes applying an input time varying modulated data signal to the power amplifier which outputs an amplified time varying modulated data signal which is an amplification of the input time varying modulated data signal; storing samples of the input time varying modulated data signal; storing samples of the output amplified time varying data signal; using the stored input and output time varying modulated samples to provide a processor implemented model with parameters representing a non-linear characteristic of the power amplifier without the use of any polynomials; and producing predistortion coefficients.

Abstract: A new radio frequency transceiver architecture comprises a combination of direct digital synthesis and digital control functions to control dual switched capacitor filters in order to perform radio frequency conversion directly to and from baseband.

Abstract: The present invention provides for methods and apparatus for fragmenting a single message and sending the message fragments over multiple independent networks to a single receiving unit. The receiving unit then reassembles the message fragments to generate the original message. The preferred apparatus embodiment is a wireless radio frequency modem that can both receive and transmit fragmented messages over multiple independent networks.

Abstract: The present invention is directed at a method and apparatus for updating a detachable software configurable wireless radio frequency modem that uses operating software. The RF modem uses an attached host computing device to download an operating software update to the RF modem's memory to reconfigure the RF modem. There is also a recovery feature that allows the original version of the RF modem's operating software to be saved and recovered if an attempt to update the RF modem's operating software is unsuccessful.

Abstract: The present invention provides for a wireless radio frequency (“RF”) modem that plugs into a host computer and shares a central processing unit and memory with the host computer, wherein principal modem functions are distributed between the modem and the host computer. In one embodiment, the modem performs RF conversion, and the host computer performs baseband processing and protocol stack control. In another embodiment, the modem performs RF conversion and baseband processing, and the host computer performs protocol stack control.