Radio architecture for an advanced digital radio in a digital communication system
First Claim
1. 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; and
said 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.
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Accused Products
Abstract
There is disclosed an improved multi-mode, spread spectrum digital radio comprising: a radio frequency (RF) subsystem for converting spread spectrum digital signals comprising voice and data communications between baseband and RF signal frequencies in response to control signals; a digital signal processor based baseband subsystem having isolation interface means bidirectionally coupled to the RF subsystem for minimizing RF and baseband signal interference; the baseband subsystem operable to control the mode of operation, to provide interface control signals to the RF subsystem based on the mode, to format the transmitted and received digital signals, and to provide external controls and status to a user to enable selectable mode switching.
48 Citations
32 Claims
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1. A digital communication device for transmitting and receiving voice and data communications, comprising:
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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; and said 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. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A digital communication device for transmitting and receiving voice and data communications, comprising:
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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, wherein said isolation interface means includes; a high speed interface for receiving and transmitting said baseband signals and control data from/to said baseband digital signal processor; a low speed interface for receiving and transmitting said RF signals from/to said RF subsystem; and circuitry for processing said baseband signals and said RF signals.
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11. A multi-mode, spread spectrum digital radio, operable in a first transmit mode and a second receive mode and having multiple submodes including a fixed frequency, frequency hopping, retransmit, bypass and remote submodes for transmitting and receiving plain text and encrypted voice and data communications, said digital radio comprising:
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a radio frequency (RF) subsystem for converting spread spectrum digital signals comprising said voice and data communications between baseband and RF signal frequencies in response to control signals; a digital signal processor-based baseband subsystem having; an isolation interface means bidirectionally coupled to said RF subsystem over a low speed data interface at a first data rate and to a baseband digital signal processor over a high speed data interface at a second data rate for minimizing signal interface between said RF and said baseband signals; a controller bidirectionally coupled to said baseband digital signal processor, a first digital signal processor and a secure processor means to provide control signals to control the mode of operation, and to enable selectable mode switching; and an interface means bidirectionally coupled to said first digital signal processor and responsive thereto for transceiving external data signals indicative of said voice and data communications over an at least one external interface; wherein said baseband digital signal processor is bidirectionally coupled to said secure processor means over a first full duplex serial synchronous channel and a first full duplex control channel for transceiving encrypted/decrypted data signals; wherein said baseband digital signal processor is bidirectionally coupled to said first digital signal processor over a second full duplex serial synchronous channel and a second full duplex control channel for transceiving bypass signals indicative of said voice communications; and wherein said first digital signal processor is bidirectionally coupled to said secure processor means over a third bidirectional channel for transceiving said encrypted/decrypted data signals. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19)
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20. A communication device, comprising:
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an RF subsystem adapted to receive RF signals carrying information and to convert the RF signals to baseband signals; a baseband subsystem adapted to extract the information from the baseband signals; and an isolation interface coupling said RF subsystem to said baseband subsystem and communicating the baseband signals between said RF and baseband subsystems, said isolation interface communicating with said baseband subsystem at a first data rate and communicating with said RF subsystem at a second data rate that is lower than the first data rate, in order to minimize interference between the RF signals and noise from clocking signals within said baseband subsystem and from signals communicated between said baseband subsystem and said isolation interface at the first data rate. - View Dependent Claims (21, 22, 23, 24, 25, 26)
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27. In a communication device having an RF subsystem and a baseband subsystem coupled via an isolation interface, a method of minimizing interference between RF signals in the RF subsystem and noise from signals within and transmitted by the baseband subsystem, comprising the steps of:
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(a) transmitting signals between the isolation interface and the baseband subsystem at a first data rate; and (b) transmitting signals between the RF subsystem and the isolation interface at a second data rate that is lower than the first data rate, such that interference between the RF signals and noise from clocking signals within the baseband subsystem and from signals communicated between the baseband subsystem and the isolation interface at the first data rate is minimized. - View Dependent Claims (28, 29, 30, 31)
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32. A communication device, comprising:
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a controller providing a user interface for managing a mode of operation of said communication device and for generating first, second and third control signals for controlling operation of the communication device; a first digital signal processor responsive to the first control signal for transmitting and receiving non-encrypted data signals indicative of voice or data communications to and from an external interface; a second digital signal processor responsive to the second control signal for transceiving, modulating and demodulating encrypted data signals; and a secure processor coupled to said first and second digital signal processors and responsive to the third control signal for encrypting data signals being transmitted from said first digital signal processor to said second digital processor and for decrypting data signals being transmitted from said second digital signal processor to said first digital signal processor; wherein said controller controls the mode of operation os said communication device by coordinating operation of said first and second digital signal processors and said secure processor via separate control signals.
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Specification