Objects of a terminal device and a base station apparatus are to improve a throughput by using a broader band. A terminal device includes a reception unit that receives a signal of a first frame structure in a prescribed carrier frequency band, and receives a signal of a second frame structure in a carrier frequency band higher than the prescribed frequency band, the signal of the first frame structure is received from a primary cell, the signal of the second frame structure is received from a secondary cell, and at least the numbers of FFT points are different from each other in the first frame structure and the second frame structure.

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.

Disclosed is a carrier aggregation device. The device comprises: a first transceiver antenna, a second transceiver antenna, a first radio frequency front end, a second radio frequency front end, and a radio frequency transceiver chip. A signal received by the first transceiver antenna is divided into a high frequency signal, an intermediate frequency signal and a low frequency signal through the first radio frequency front end, and the three signals separately enter the radio frequency transceiver chip. A signal received by the second transceiver antenna is divided into high frequency signal, an intermediate frequency signal and a low frequency signal through the second radio frequency front end, and the three signals separately enter the radio frequency transceiver chip.

Herein a Radio Access node for multi band communication and a method therein are described. The Radio Access node is configured for communication with at least one wireless device in a first frequency band. The method comprises performing at least one measurement in a second frequency band, by use of a feedback receiver. The at least one measurement is performed in order to detect signals, in the second frequency band, produced by other entities than the Radio Access node. The feedback receiver is also operable to measure signals transmitted by the Radio Access node.

A demultiplexing apparatus includes a signal receiving unit that receives signals, an analog demultiplexing unit that analog-demultiplexes, in predetermined units of channels, received signals received by the signal receiving unit and generates analog demultiplexed signals, and a plurality of digital demultiplexing units that digital-demultiplex the analog demultiplexed signals in units of sub-channels and generate digital demultiplexed signals. The analog demultiplexing unit controls, concerning the analog demultiplexed signals output to the digital demultiplexing units, a total value of bandwidths in which a signal is present so as to be a predetermined value or less.

Methods, apparatuses, and embodiments related to a technique for controlling channel usage in a wireless network in a multi-band wireless networking system. In a wireless network with multiple wireless networking devices and one or more client devices, communications between the wireless networking devices occurs via a backhaul channel, and communication between the client(s) and the wireless networking devices occurs via a fronthaul channel. Based on interference characteristics of the wireless channels, a device determines a channel usage plan, and communicates the plan via the backhaul channel to the wireless networking devices of the wireless network.

In an example embodiment, there is disclosed herein an apparatus comprising a wireless transceiver and a controller coupled to the wireless transceiver and configured to receive data via the wireless transceiver. The controller operates the wireless transceiver at a first power save state where the wireless transceiver can receive a frame but other circuits are de-energized. The controller is responsive to the wireless transceiver receiving a frame while the wireless transceiver is in a first power state to determine whether the frame is a predefined wakeup frame. The controller provides additional power to the wireless transceiver responsive to determining the frame is a predefined wakeup frame.

A link identifier indication method includes: A multi-link device working on a plurality of links sends a radio frame, where the radio frame includes link information of at least one link in the plurality of links, and link information of one link is used to indicate the link and corresponds to a link identifier of the link; a receiving device that receives the radio frame may determine the link identifier of the link corresponding to the link information, so that in communication of the multi-link device, a link can be identified by using the link identifier.

An apparatus includes a first amplifier stage configured to amplify a first carrier signal. The apparatus includes a second amplifier stage configured to amplify a second carrier signal. A resistive-capacitive (RC) network is coupled to the first amplifier stage and to the second amplifier stage. The RC network includes a resistive element coupled to a capacitive element.

Embodiments relate to a multiband transceiver apparatus (100), comprising a first transmit path (110) operable to transmit a first transmit signal (sig1) in a first radio frequency band (RF.sub.1), wherein the first transmit path (110) comprises an input (112), an output (114) and a first feedback path (116) from the output towards the input of the first transmit path, a second transmit path (130) operable to transmit a second signal (sig2) in a second radio frequency band (RF.sub.2), the second radio frequency band (RF.sub.2) being different from the first radio frequency band (RF.sub.1), wherein the second transmit path (130) comprises an input (132), an output (134) and a second feedback path (136) from the output towards the input of the second transmit path, and a cross-talk canceller (150) operable to cancel cross-talk from the second feedback path (136) to the first feedback path (116) and/or to cancel cross-talk from the first feedback path (116) to the second feedback path (136) of the multiband transceiver apparatus (100).