摘要:
An adapter (400) for a portable land mobile radio (LMR) transceiver system (414) where the LMR includes a push-to-talk (PTT) transmitter control system. The adapter includes a tip-ring-sleeve (TRS) type interface connector (402) configured to accept a plug (101) from a standard mobile phone headset. An adapter circuit (401) is configured to detect a momentary actuation of an answer/end switch (201) of a standard mobile phone headset when a TRS plug of the standard mobile phone headset is inserted in the interface connector (402). The adapter circuit alternately latches a PTT input of the LMR transmitter control system in either a transmit active state, or a transmit inactive state, in response to actuation of the answer/end switch of the mobile phone handset.
摘要:
Disclosed an apparatus and a method for simutaneously providing a voice service and a data service in an electronic device. The electronic device includes: an antenna for transmitting or receiving one or more signals of a first signal corresponding to a first communication network and a second signal corresponding to a second communication network; a first communication control module for processing the first signal; a second communication control module for processing the second signal; and a divider for distributing the one or more signals received through the antenna to the first communication control module and the second communication control module.
摘要:
According to at least one aspect, a communication system is provided. The communication system includes a first switch device configured to receive a first plurality of radio frequency (RF) signals detected by an antenna array and provide an RF signal selected from among the first plurality of RF signals to a receiver circuit, the first plurality of RF signals comprising a first RF signal in a first frequency range and a second RF signal in a second frequency range that is different from the first frequency range; and a second switch device configured to receive a second plurality of RF signals detected by the antenna array and provide an RF signal selected from among the second plurality of RF signals to the receiver circuit, the second plurality of RF signals comprising a third RF signal in the first frequency range and a fourth RF signal in the second frequency range.
摘要:
A transceiver includes a transmit signal path, a receive signal path, an amplifier, and control circuitry. The control circuitry is configured to couple the amplifier in the transmit signal path to amplify a transmit signal during a transmit operating mode of the transceiver. Furthermore, the control circuitry is configured to couple the amplifier in the receive signal path to amplify a receive signal during a receive operating mode of the transceiver.
摘要:
A full-duplex radio device is disclosed. The full-duplex radio device includes an analog transmission (TX) circuit that includes a power amplifier to output an analog TX signal. The full-duplex radio device also includes a feedback receiver circuit coupled to the analog TX circuit. The feedback receiver circuit provides a digital representation of the analog TX signal that is used to digitally cancel at least a transmitter noise component of a self-interference signal associated with a transmission of the analog TX signal in the full-duplex radio device.
摘要:
A method, comprising: at a mobile device; setting the mobile device to operate in a first operational mode that is a default mode for sending association requests to a base station; sending an association request to the base station while operating in the first operational mode; receiving a first mode control instruction from the base station operating in the first operational mode, wherein the first mode control instruction includes an instruction for the mobile device to switch to a second operational mode; setting the mobile device to operate in the second operational mode; sending additional signals to the base station while operating in the second operational mode; and receiving a second mode control instruction from the base station.
摘要:
A system and method for filtering signals in a communications system reduces hardware and chip size requirements by selectively connecting a filter along transmitter and receiver paths of a transceiver. In operation, a controller generated signals for connecting the filter along the transmitter path when the transceiver is in transmitter mode and for connecting the filter along the receiver path when the transmitter is in receiver mode. The controller then generates additional signals for setting one or more parameters of the filter based on the path connected, or put differently based on the operational mode of the transceiver. In a variation, the controller sets the parameters of additional elements coupled to the filter as a way of further controlling processing of the transmitter and receiver signals. The system and method are particularly well suited to controlling the filtering of signals at the front-end of the transceiver having a direct-conversion architecture and in general ones performing time-multiplexing applications.
摘要:
An electronic device may be provided with wireless circuitry. The wireless circuitry may include one or more antennas. The electronic device may have a housing in which control circuitry and radio-frequency transceiver circuitry is mounted. The transceiver circuitry may be used to transmit and receive radio-frequency signals using the antennas. The electronic device may have radio-frequency sensors (146, 146'). The radio-frequency sensors may include current sensors, voltage sensors, power sensors, sensors with taps and switching circuitry that tap signals flowing in a signal path and that may make measurements such as impedance measurements, and radio-frequency sensors (146, 146') with sensor antennas (152) and associated sensor circuits (150) that measure radio-frequency signals received using the sensor antennas (152). The control circuitry may make wireless circuit adjustments based on measured radio-frequency signals.