Abstract:
An RF emitter sensing device is provided comprising an antenna circuit and an estimator configured to output, for one or more incoming signals-of-interest (Sol), either or both of an estimated range to the emitter of each Sol, and estimates for one or more angles corresponding to the 3D angle-of-arrival (AoA) of each Sol, wherein: the antenna circuit has a plurality of ports that each output an output signal containing the one or more Sol, the antenna circuit including one or more multi-port antennas, each multi-port antenna having two or more ports, each multi-port antenna being configured to pick up a combination of one or more E-field signals and one or more H-field signals from each Sol, in a common volume of space.
Abstract:
A method is provided for transmitting data. A first device (121) generates a first signal (320) having a first duty cycle, comprising a first gated-on portion (323) and a first gated-off portion (326) a time slot (260); and a second device (125) generates a second signal (330) having second duty cycle, comprising a second gated-on portion (333) and a second gated-off portion (336) in the same time slot (260). The first gated-on portion (323) is generated during a first segment of the time slot (260) and the first gated-off portion (326) is generated during a second segment of the time slot (260), while the second gated-on portion (333) is generated during the second segment and the second gated-off portion (336) is generated during the first segment. Media access control (MAC) can be used to further define positions within time slots (250) and provide error correction, power control, and the like. A preamble (860) can be transmitted at an increased power level to facilitate acquisition.
Abstract:
A method is provided for transmitting data. A first device (121) generates a first signal (320) having a first duty cycle, comprising a first gated-on portion (323) and a first gated-off portion (326) a time slot (260); and a second device (125) generates a second signal (330) having second duty cycle, comprising a second gated-on portion (333) and a second gated-off portion (336) in the same time slot (260). The first gated-on portion (323) is generated during a first segment of the time slot (260) and the first gated-off portion (326) is generated during a second segment of the time slot (260), while the second gated-on portion (333) is generated during the second segment and the second gated-off portion (336) is generated during the first segment. Media access control (MAC) can be used to further define positions within time slots (250) and provide error correction, power control, and the like. A preamble (860) can be transmitted at an increased power level to facilitate acquisition.
Abstract:
A circuit (100) is provided for notching an incoming wireless signal. The circuit comprises: a notching mechanism (110) for receiving an incoming signal and generating a notched signal having reduced power at the notch frequency (320), the notch frequency being adjustable in response to a notching control signal; a signal parameter detector (165, 170, 175, 180, 185) for detecting a signal parameter of the notched signal (325); a controller (155) for receiving the signal parameter and for generating the notching control signal (315), the controller being configured to vary the signal parameter within a notching control signal range (340); and a memory (160) for storing the signal parameter and the notching control signal received from the controller in a notching database (330). The controller is configured to analyze the notching database to determine an optimal notching control signal to achieve a desired level of signal performance (345).
Abstract:
A transceiver (400) is provided in an ultrawide bandwidth device, which includes an antenna (110), a transmitter circuit (145), and a receiver circuit (165). A transmitter amplifier (440) is provided between the antenna (110 ) and the transmitter circuit (145), and is configured to have an operational transmitter output impedance when the transceiver (400) is in a transmit mode and an isolation transmitter output impedance when the transceiver (400) is in a receive mode. A receiver amplifier (460) is provided. between the antenna (110) and the receiver circuit (165), and is configured to have an operational receiver input impedance when the transceiver (400) is in a receive mode and an isolation receiver input impedance when the transceiver (400) is in a transmit mode. The isolation transmitter output impedance is greater than the operational receiver input impedance, and the isolation receiver input impedance is greater than the operational transmitter output impedance. Thus, a transmitter and receiver can be isolated without using a transmit/receive switch.
Abstract:
A method is provided for generating a multiple band ultrawide bandwidth signal. In this method, an ultrawide bandwidth devices provides a first reference signal (1022) having a first reference frequency, and a second reference signal (1023) having a second reference frequency that is different from the first reference frequency. The device generates a first ultrawide bandwidth signal (1070) based on the first reference signal, and a second ultrawide bandwidth signal (1075) based on the second reference signal, creating two separate frequency bands. These two signals can be generated form the same base clock signal (1020), allowing for significantly simpler implementation and modification.
Abstract:
A circuit (100) is provided for notching an incoming wireless signal. The circuit comprises: a notching mechanism (110) for receiving an incoming signal and generating a notched signal having reduced power at the notch frequency (320), the notch frequency being adjustable in response to a notching control signal; a signal parameter detector (165, 170, 175, 180, 185) for detecting a signal parameter of the notched signal (325); a controller (155) for receiving the signal parameter and for generating the notching control signal (315), the controller being configured to vary the signal parameter within a notching control signal range (340); and a memory (160) for storing the signal parameter and the notching control signal received from the controller in a notching database (330). The controller is configured to analyze the notching database to determine an optimal notching control signal to achieve a desired level of signal performance (345).
Abstract:
A method is provided for offsetting a reference frequency of a quadrature reference clock signal. A quadrature reference clock (110) generates the quadrature reference clock signal at the reference frequency, while a quadrature variable offset clock (130) generates a quadrature clock signal at a base offset frequency based on a base offset value it receives from a control circuit (560). The base offset value can be determined in many ways, including reading it from a local memory (910) or receiving it from a remote device (1010). A polyphase mixer (140) performs a polyphase mixing operation between the quadrature reference clock signal and the offset clock signal to generate an agile clock signal having an agile clock frequency equal to the reference frequency plus the base offset frequency. If desired, the method can revise the offset frequency based on actual conditions and determine a corresponding revised offset value (920, 1020).
Abstract:
A method is provided for receiving a data frame in an ultrawide bandwidth network. In this method, a device receives an ultrawide bandwidth signal containing a data frame. The device then performs an acquisition operation during a first preamble in the data frame, and identifies a marker after the first preamble that indicates that the first preamble has ended. After this, the device performs a signal processing operation during a second preamble in the data frame. After the training, the device then receives a header in the data frame, and then receives a payload in the data frame. By having a marker between the two preambles, this method provides a receiving device with critical information regarding the timing of the preamble section of a frame.
Abstract:
A method is provided for generating a multiple band ultrawide bandwidth signal. In this method, an ultrawide bandwidth devices provides a first reference signal having a first reference frequency, and a second reference signal having a second reference frequency that is different from the first reference frequency. The device generates a first ultrawide bandwidth signal based on the first reference signal, and a second ultrawide bandwidth signal based on the second reference signal, creating two separate frequency bands. These two signals can be generated form the same base clock signal, allowing for significantly simpler implementation and modification.