Patent ID: 6078612
Filing Date: 2000-06-20
Classification: H04B

Abstract:
A digital communication device for transmitting and receiving voice and data communications, comprising:a radio frequency (RF) subsystem for converting digital signals between baseband and RF signal frequencies in response to control signals;a digital signal processor based baseband subsystem having an isolation interface bidirectionally coupled to said RF subsystem for transceiving RF signals at a first data rate and transceiving baseband signals at a second data rate to minimize signal interference between said RF and said baseband signals, said baseband subsystem operable to control a mode of operation of the digital communication device, to provide said control signals to said RF subsystem based on said mode of operation, and to provide external controls and status to a user to enable selectable mode switching, wherein said baseband subsystem includes:a controller for providing a user interface for managing said mode of operation and for controlling first and second digital signal processors and a secure processor via separate control signals;said first digital signal processor responsive to a first control signal from said controller for transceiving external data signals indicative of said voice and data communications;said second digital signal processor responsive to a second control signal from said controller for transceiving, modulating and demodulating baseband data signals indicative of said voice and data communications and for communicating with said RF subsystem; andsaid secure processor means bidirectionally coupled to said first and second processors and responsive to a third control signal from said controller for encrypting/decrypting data signals indicative of said voice and data communications.