A multi-band radio frequency front-end device, a multi-band receiver, and a multi-band transmitter, the multi-band radio frequency front-end device including a first radio frequency front-end circuit, where the first radio frequency front-end circuit works on a first band, a second radio frequency front-end circuit, where the second radio frequency front-end circuit works on a second band, a first input/output matching network, and a second input/output matching network, where routing of the first input/output matching network and routing of the second input/output matching network on a layout are annular and nested.

The invention relates to a method for receiving radio broadcast signals by means of a radio broadcast receiver and to a radio broadcast receiver designed for performing the method, wherein the broadcast receiver has at least two receiving units for different transmission techniques. The user selects a radio broadcast service of a first receiving unit of the at least two receiving units, and the selected radio broadcast service is then played back by the radio broadcast receiver. The other, second receiving unit for the different transmission technique of the radio broadcast receiver searches for an alternative radio broadcast service having preferably the same or comparable content during the playback of the radio broadcast service selected by the user, and the radio broadcast receiver automatically switches over to the second receiving unit having the alternative radio broadcast service if the first receiving unit cannot play back the selected radio broadcast service.

An electronic device has a first and second radio, each being compatible with at least two wireless local area network (LAN) standards and one or both being compatible with at least one wireless personal area network (WPAN) standard. The electronic device includes a radio control arrangement that establishes mutually non-interfering communication links between (i) one or both of the first and second radio and (ii) at least two remote devices within a wireless LAN that includes the electronic device and the at least two remote devices. The at least two remote devices include at least one network access point and at least a second electronic device; the mutually non-interfering communication links including a network communication link between the first or second radio and the access point, and a peer-to-peer communication link between the first radio or the second radio and the second electronic device.

The present invention brings about an effect of reducing a deterioration in communication quality that may occur in a communication circuit that can communicate in different communication modes. A communication circuit (100) of an aspect of the present invention includes a control section (109) that (i) controls a reception filter (194) such that respective passbands of a transmission filter (103) and the reception filter (104) are different from each other in a case where a full-duplex communication is made in a FDD mode, and (ii) controls the reception filter (104) such that at least part of the passband of the transmission filter (103) and at least part of the passband of the reception filter (104) overlap each other in a case where a full-duplex communication is made in a TDD mode.

Embodiments of the present disclosure utilizes the natural properties of RFI noise on a wireline link. Since differential RFI noise in the system has some correlation with the common mode noise on the cable, a replica of RFI noise can be regenerated by an adaptive filter based on information about the common mode noise. The replica RFI is subtracted from the equalizer output prior to the data decision circuitry or slicer. In this method, the system does not require expensive cable, nor does the equalizer suffer additional loss due to an RFI notch filter. Since RFI can be detected and mitigated, this information can also be coupled to safety systems to increase functional safety under high EMI conditions.

An apparatus and method for receiving and displaying a television signal and a data signal in a mobile terminal. The mobile terminal includes a display unit with a video data display area and a user data display area. The mobile terminal determines in a standby mode whether it is set to a television mode or communication mode. If the mobile terminal is set to the television mode, it controls a tuner to select a desired television channel. The mobile terminal stores video data of a current frame received over the selected channel and user data corresponding to the selected channel in a memory unit, outputs video data of a previous frame stored in the memory unit to the video data display area of the display unit in a frame period and then outputs the user data stored in the memory unit to the user data display area of the display unit upon completing the output of the video data of the previous frame. In the communication mode, the mobile terminal stops the operation of the tuner and displays user data generated in the communication mode in the video data display area and user data display area.

A high-frequency switch module (10) includes a switch element (20) and LC parallel resonant circuits (31 and 32). The switch element (20) includes selection target terminals (P14 and P21) used to transmit communication signals using different frequencies. The LC parallel resonant circuits (31 and 32) are connected between a connection conductor (901) connected to the selection target terminal (P14) and a connection conductor (902) connected to the selection target terminal (P21). The LC parallel resonant circuits (31 and 32) are connected in series between the connection conductors (901 and 902). The LC parallel resonant circuits (31 and 32) have different attenuation pole frequencies.

Radio frequency (RF) communication systems with coexistence management are provided herein. In certain embodiments, a method of coexistence management in a mobile device includes providing an RF receive signal from a first front end system to a first transceiver, generating an RF transmit signal and an RF observation signal using a second front end system, the RF observation signal generated based on observing the RF transmit signal, generating digital observation data based on the RF observation signal using a second transceiver, downconverting the RF receive signal to generate a baseband receive signal using the first transceiver, and compensating the baseband receive signal for RF signal leakage based on the digital observation data using the first transceiver.

A method and transmission system for amplifying and providing navigation signals. The system comprises a splitter circuit configured to receive a plurality of radio frequency (RF) signals oscillating at at least two different frequencies f.sub.1 and f.sub.2. The splitter circuit is further configured to split and forward the RF signals having the f.sub.1 frequency to a first bandpass filter and the RF signals having the f.sub.2 frequency to a second bandpass filter. The system further comprises a first tunable amplifier configured to receive the RF signals from the first bandpass filter. The system further comprises a second tunable amplifier configured to receive the RF signals from the second bandpass filter at substantially the same time as the first tunable amplifier's receipt of the RF signals from the first bandpass filter. The first tunable amplifier is further configured to amplify its RF signals across a first band centered around the frequency f.sub.1. The second tunable amplifier is further configured to amplify its RF signals across a second band centered around the frequency f.sub.2. The amplified RF signals are fed substantially concurrently into a mixer circuit for transmission via an RF antenna to a navigation receiver.

In some examples, a system includes at least two antennas configured to receive signals encoding first, second, and third messages in first, second, and third frequency bands. The system also includes a set of splitters configured to generate separate signals in the first, second, and third frequency bands. The system further includes a set of combiners, wherein each combiner of the set of combiners is configured to combine two or more of the separate signals. The system includes a set of mixers configured to down-convert the combined signals and at least one analog-to-digital converter configured to sample the down-converted signals. The system also includes processing circuitry configured to determine data in the first, second, and third messages based on an output of the at least one analog-to-digital converter.