For wireless cellular communications, a “smart” multi-band combiner system has a multi-band combiner and a passive inter-modulation (PIM) detection sub-system. The multi-band combiner combines multiple transmit signals in different downlink frequency bands into a single, multi-band transmit signal for transmission from a cell tower antenna. The PIM detection sub-system characterizes the frequency components in the multi-band transmit signal to predict PIM products and determine if any predicted PIM products might interfere with any receive signals in any uplink frequency bands. If so, the PIM detection sub-system generates a signal indicating the presence of such predicted interfering PIM products, and the system installer and/or the network administrator can take remedial action to prevent the PIM products from interfering with user communications.

An improved superheterodyne receiver for a portable radio is provided. The receiver includes a frequency controller that applies pulse-shaped modulation to first and second LO signals in a synchronized manner. The frequency controller is steered by Artificial Intelligence (AI) based machine learning (ML) to determine first and second LOs that minimize image interference in the baseband signal.

An improved superheterodyne receiver for a portable radio is provided. The receiver includes a frequency controller that applies pulse-shaped modulation to first and second LO signals in a synchronized manner. The frequency controller is steered by Artificial Intelligence (AI) based machine learning (ML) to determine first and second LOs that minimize image interference in the baseband signal.

Various data transmission detection systems are described. A receiver input through which a wireless data transmission signal is received may be present. A plurality of mixers in communication with the receiver input may be present, which may be digitally implemented. A data transmission detector may be present that receives a mixed wireless data transmission signal from each mixer and creates a plurality of scores. A match detection module may be present that receives the scores and identifies a highest score. The signal mapped to the highest score to be selected for further processing.

The present technology relates to a semiconductor chip and a receiving apparatus capable of suppressing increases in size and cost due to circuit complexity.

A tuner includes an RF input terminal to which an RF signal of terrestrial broadcasting is input, a first-IF input terminal to which a first-IF signal of satellite digital broadcasting is input, a first filter that filters a signal in a frequency band lower than a predetermined frequency, a second filter that filters a signal in a frequency band equal to or higher than the predetermined frequency, and a switch that causes the RF signal to be input to the first filter or to the second filter by switching according to a frequency of the RF signal, and causes the first-IF signal to be input to the first filter or to the second filter by switching according to a frequency of the first-IF signal. The present technology may be applied to a broadcast receiving system.

The present technology relates to a semiconductor chip and a receiving apparatus capable of suppressing increases in size and cost due to circuit complexity.

A tuner includes an RF input terminal to which an RF signal of terrestrial broadcasting is input, a first-IF input terminal to which a first-IF signal of satellite digital broadcasting is input, a first filter that filters a signal in a frequency band lower than a predetermined frequency, a second filter that filters a signal in a frequency band equal to or higher than the predetermined frequency, and a switch that causes the RF signal to be input to the first filter or to the second filter by switching according to a frequency of the RF signal, and causes the first-IF signal to be input to the first filter or to the second filter by switching according to a frequency of the first-IF signal. The present technology may be applied to a broadcast receiving system.

A receiver for cancelling strong signals from combined weak and strong signals includes: a first circuitry for inputting a weak and strong signal as an input; a parametric cancellation circuit for inputting a representation of the strong signal and an output of the first circuitry to produce a cancellation signal; a second circuitry electrically coupled to the parametric cancellation circuit for inputting the cancellation signal to produce a modulated output; a demodulator electronically coupled to the second circuitry for demodulating the modulated output to produce a demodulated output and an error signal, where the demodulated output is the data contained in the weak signal; and an adaptation logic circuit for inputting the representation of the strong signal, the demodulated output and the error signal to adaptively produce parameters for the parametric cancellation circuit. The parametric cancellation circuit further inputs the error signal and the parameters to produce the cancellation signal.

A receiver for cancelling strong signals from combined weak and strong signals includes: a first circuitry for inputting a weak and strong signal as an input; a parametric cancellation circuit for inputting a representation of the strong signal and an output of the first circuitry to produce a cancellation signal; a second circuitry electrically coupled to the parametric cancellation circuit for inputting the cancellation signal to produce a modulated output; a demodulator electronically coupled to the second circuitry for demodulating the modulated output to produce a demodulated output and an error signal, where the demodulated output is the data contained in the weak signal; and an adaptation logic circuit for inputting the representation of the strong signal, the demodulated output and the error signal to adaptively produce parameters for the parametric cancellation circuit. The parametric cancellation circuit further inputs the error signal and the parameters to produce the cancellation signal.

We disclose multiband receivers for millimeter-wave devices, which may have reduced size and/or reduced power consumption. One multiband receiver comprises a first band path comprising a first passive mixer configured to receive a first input RF signal having a first frequency and to be driven by a first local oscillator signal having a frequency about ⅔ the first frequency; a second band path comprising a second passive mixer configured to receive a second input RF signal having a second frequency and to be driven by a second local oscillator signal having a frequency about ⅔ the second frequency; and a base band path comprising a third passive mixer configured to receive intermediate RF signals during a duty cycle and to be driven by a third local oscillator signal having a frequency about ⅓ the first frequency or about ⅓ the second frequency during the duty cycle.

A calibration system including a signal generator device, at least one calibration receiver and a processing circuit is described. The signal generator device has a signal generation circuit configured to generate a signal, at least one signal path terminating at a signal output port of the signal generator device, and at least one tap provided in the signal path. The at least one calibration receiver is connected with the at least one tap in the signal path. The at least one calibration receiver is connected with the processing circuit. The processing circuit is configured to receive measurement results obtained by the at least one calibration receiver and to analyze the measurement results received, thereby determining analysis results.