The disclosure relates to technology for an apparatus having a current conveyer comprising a first stage having a first differential input, and a second stage having a second differential input. The first and second stages are configured to operate in a push-pull mode to provide an output signal at a current conveyer output between the first stage and the second stage. The apparatus has a first frequency mixer configured to generate a first mixer signal based on an input signal and an oscillator signal having a first frequency. The first frequency mixer is configured to provide the first mixer signal to the first differential input. The apparatus has a second frequency mixer configured to generate a second mixer signal based on the input signal and a second oscillator signal having the first frequency. The second frequency mixer is configured to provide the second mixer signal to the second differential input.

Devices, systems and method for enabling radio communications between a plurality of users are disclosed herein. In an embodiment, a mobile tactical device includes a radio connection interface, a first frequency converter, a frequency filter, and a second frequency converter. The radio connection interface is configured to receive a first radio communication having a mobile frequency from a mobile radio. The first frequency converter is configured to convert the mobile frequency to an intermediate frequency. The frequency filter is configured to pass or reject the intermediate frequency. The second frequency converter is configured to convert the intermediate frequency to an assigned transmission frequency for transmission of the first communication when the intermediate frequency passes the at least one frequency filter.

A radio-frequency signal preconditioning method includes: receiving, at a radio-frequency signal preconditioning apparatus from an antenna, a radio-frequency signal; selectively providing, at the radio-frequency signal preconditioning apparatus, any of a plurality of gains to the radio-frequency signal to produce an output signal, the plurality of gains spanning a first range; and providing, from the radio-frequency signal preconditioning apparatus, the output signal to a conversion circuit configured to convert the output signal from an analog signal at a radio frequency to a digital signal at a baseband frequency, the conversion circuit having a dynamic range spanning a second range that is smaller than the first range.

A computing device with a configurable antenna. The antenna is configured through a switching circuit operating under software control. Operating characteristics of the antenna are configured based on connections between conducting segments established by the switching circuit, allowing the nominal frequency, bandwidth or other characteristics of the antenna to be configured. Because the switching is software controlled, the configurable antenna may be integrated with a software defined radio. The radio and antenna can be reconfigured to support communication according to different wireless technologies at different times or to interleave packets according to different wireless technologies to support concurrent sessions using different wireless technologies.

A signal analysis method is described. The signal analysis method includes: receiving an input signal having unknown characteristic signal parameters; determining IQ data being associated with the input signal; determining at least one of the characteristic signal parameters based on the IQ data via an artificial intelligence circuit; and adapting at least one measurement parameter of a measurement instrument based on the at least one characteristic parameter by the artificial intelligence circuit. Moreover, a signal analysis circuit is described.

A channel sharing method includes receiving a signal in a frequency band. The frequencies in the signal above a cutoff frequency are filtered to generate a filtered signal. The cutoff frequency is determined based on a frequency region that includes a plurality of frequency bands. The filtered signal is amplified using a mixer-tuned low noise amplifier (LNA). The mixer-tuned LNA includes a passive switching mixer and an LNA. The passive switching mixer presents a tunable impedance to the LNA. The LNA provides a voltage gain to the passive switching mixer. The voltage gain being proportional to the tunable impedance.

A Radio Frequency (RF) receiver is provided. The RF receiver is configured to simultaneously receive at least two radio frequency bands with a single receiver path. The RF receiver comprises a single local oscillator (LO), and the RF receiver is configured to filter a received signal using a complex filter having a variable center frequency. in accordance with another aspect, many RF receivers are combined to form an aggregate carrier receiver.

Disclosed are a broadcast signal receiver and an operation method thereof. When there are multiple broadcast signals representing the same broadcast content, the broadcast signal receiver calculates signal quality values of the respective broadcast signals, select one of the plurality of broadcast signals for a specific channel, on the basis of the signal quality values, and sets information of the selected broad cast signal as the specific channel in the channel map. Therefore, the broadcast signal receiver can prevent the number of channels from being increased due to a plurality of same channels and can provide a higher quality image to the user.

A Radio Frequency (RF) receiver is provided. The RF receiver is configured to simultaneously receive at least two radio frequency bands with a single receiver path. The RF receiver comprises a single local oscillator (LO), and the RF receiver is configured to filter a received signal using a complex filter having a variable center frequency. In accordance with another aspect, many RF receivers are combined to form an aggregate carrier receiver.

A signal analysis method is described. The signal analysis method includes: receiving an input signal having unknown characteristic signal parameters; determining IQ data being associated with the input signal; determining at least one of the characteristic signal parameters based on the IQ data via an artificial intelligence circuit; and adapting at least one measurement parameter of a measurement instrument based on the at least one characteristic parameter by the artificial intelligence circuit. Moreover, a signal analysis circuit is described.