Abstract:
This disclosure provides systems, methods, and apparatus for antenna selection for different radio access technologies. An apparatus can include a plurality of antennas and a plurality of radio access technology modules each configured to communicate according to a different radio access technology. The apparatus further includes a controller configured to switch communication circuits of each of the radio access technology modules to communicate via a corresponding one or more of the plurality of antennas. The apparatus further includes a switching manager configured to manage a plurality of switch configurations each defining a mapping between each of the radio access technology modules and the antennas. The switching manager is further configured to store a switch configuration used for a first radio access technology module and cause the controller to maintain the switch configuration in place in response to a network handover. Other aspects, embodiments, and features are also claimed and described.
Abstract:
Aspects disclosed herein relate to using a processor controlled switcher architecture with a high-efficiency PA control. A wireless communications device may be include a processor, a power amplifier and a processor controller PA switcher. In an aspect, the processor may be a modem, a RF chip, etc. In one example, the PA switcher may be configured to receive a switcher control signal on the control line. In an aspect, the switcher control signal may be based on future characteristics of an input signal. The PA switcher may be further configured to select a voltage path from among a plurality of voltage paths based on the switcher control signal to provide a supply voltage to the lower pass filter associated with the PA.
Abstract:
This disclosure provides systems, methods, and apparatus for mobile transmit diversity. In one aspect, a wireless communication apparatus is provided. The wireless communication apparatus includes a transmit circuit configured to transmit wireless communications via either a first antenna or a second antenna. The wireless communication apparatus further includes a receive circuit configured to receive wireless communications using either the first antenna or the second antenna. The wireless communication apparatus further includes a controller configured to switch the transmit circuit and the receive circuit from transmitting and receiving wireless communications via the first antenna to transmit and receive wireless communications via the second antenna in response to detecting that a first receive power level of the first antenna is less than a second receive power level of the second antenna and a difference between the second receive power level and the first receive power level is greater than a threshold.
Abstract:
A method of wireless communication is disclosed, in which a wearable device may determine whether a network operator provides support for bursty communication, and communicate directly through the network operator in the bursty communication in response to the determining the network operator provides the support for bursty communication. The support for bursty communication by the network operator may be either integrated into a telephony application server (TAS) or a wearable application server (WAS) that is a separate entity from the TAS and deployed between the TAS and the wearable device. The bursty communication by the wearable device may include receiving packets in the bursty communication, buffering the received packets, and transmitting or playing out the bursty communication in entirety after all of the packets in the bursty communication have been received. Apparatus corresponding to such method is also disclosed.
Abstract:
System and method for temperature-calibration of a crystal oscillator (XO) in a mobile device. A temperature-calibration status of the XO is determined and a trigger condition related to temperature-calibration of the XO is detected. If the temperature-calibration status of the XO is not fully temperature-calibrated or if the XO has not been previously temperature-calibrated, a temperature-calibration session is initiated by an XO manager based on the condition, wherein a receiver is configured to receive signals and temperature-calibration of the XO is performed in a background mode based on the received signals. The condition based triggering ensures that the XO is temperature-calibrated prior to launch of any position based or global navigation satellite systems (GNSS) based applications on the mobile device. The trigger condition can include first use or power-on, charging, presence in an outdoor environment, variation in operating temperature, pre-specified time, and/or user input pertaining to the mobile device.
Abstract:
A wireless device includes: a first radio and first transceiver configured to transmit and receive according to a first radio access technology; a second radio and second transceiver configured to transmit and receive according to a second radio access technology; a first antenna and a second antenna connected to the first radio and the second radio; a switch; and a control unit configured to control the switch to configure connections of the first and second antennas to the first and second radios. The control unit is configured to control the switch to disconnect the second radio from the second antenna in response to a receiving, by the second radio through the second antenna, a signal that is below a predetermined threshold, and to connect the second radio to the first antenna during a wakeup period of the second radio.
Abstract:
This disclosure provides systems, methods, and apparatus for antenna switching for simultaneous communication. An can include a plurality of antennas including a first antenna and a second antenna. The apparatus can further includes a plurality of receive circuits including a first receive circuit. The apparatus can further include a controller configured to determine one or more performance characteristics of the first antenna at a first time. The controller is further configured to determine a difference between the one or more performance characteristics of the first antenna at the first time and one or more performance characteristics of the first antenna at an earlier time. The controller is further configured to selectively switch the first receive circuit from receiving wireless communications via the first antenna to receive wireless communications via the second antenna if the difference is larger than a threshold. Other aspects, embodiments, and features are also claimed and described.
Abstract:
TDD devices may transmit using multiple antennas. First and second antennas having first and second receive conditions may receive a communication. In an aspect, first and second transmit conditions for the first and second antennas may be determined based on the first and second receive conditions. In an aspect, the first and second transmit conditions may be compared to select the first or second antenna for transmissions. In an aspect, the first and second receive conditions may be compared to select the first or second antenna for transmissions. In an aspect, first and second transmission conditioning values, which may determine transmission powers, may be determined based on the first and second receive conditions. A first transmission chain, associated with an active RAT or carrier, and a second transmission chain, associated with an inactive RAT or carrier, may be activated to send transmissions from the first and second antennas.
Abstract:
Aspects disclosed herein relate to predicting one or more signal characteristics to improve efficiency for a PA. A wireless communications device may be include a power amplifier and a processor that is associated with a signal prediction module. In an aspect, the processor may be a modem, a RF chip, etc. In one example, the wireless communications device may be configured to buffer one or more values associated with an input signal. The signal prediction module may be configured to predict a system response to at least a portion of the one or more buffered values, and generate a switcher control signal based on the system response. The signal prediction module may also generate a predicted supply voltage from the values associated with the input signal.
Abstract:
This disclosure provides systems, methods, and apparatus for antenna switching for simultaneous communication. In one embodiment, a wireless communication apparatus is provided. The wireless communication apparatus includes a plurality of antennas including a first antenna and a second antenna. The wireless communication apparatus further includes a plurality of receive circuits including a first receive circuit. The wireless communication apparatus further includes a controller configured to determine one or more performance characteristics of the first antenna over a plurality of sources. The controller is further configured to selectively switch the first receive circuit from receiving wireless communications via the first antenna to receive wireless communications via the second antenna if the one or more performance characteristics of the first antenna over the plurality of sources fall simultaneously. Other aspects, embodiments, and features are also claimed and described.