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. 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.
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:
This disclosure provides systems, methods, and apparatus for an initial network acquisition process via multiple antennas. In one aspect a method of establishing communications via a wireless network at a wireless communications apparatus is provided. The method includes attempting an initial acquisition process, over one or more frequencies, for establishing communications over the wireless network via a transmit circuit and a receive circuit transmitting and receiving via a first antenna. The method further includes switching the transmit circuit and the receive circuit from transmitting and receiving via the first antenna to a second antenna in response to detecting failure of the initial acquisition process. The switching is independent of a performance metric of the first or the second antenna. The method further includes re-attempting the initial acquisition process based on the switching to the second antenna over the one or more frequencies.
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:
Aspects of the methods and apparatus relate to improving the overall decision quality of the Fractional-Dedicated Physical Channel (F-DPCH) channel. One aspect of the methods and apparatus relates to detecting bad channel conditions of a serving base station and improving the serving base station F-DPCH decoding performance in such bad conditions based on the serving base station signal-to interference ratio (SIR) estimation. Another aspect of the methods and apparatus relate to improving the overall decision quality of the F-DPCH channel in soft handover (HO) scenarios by increasing the non-serving base station F-DPCH channel rejections thresholds based on certain SIR estimations. The F-DPCH channel rejections thresholds are based on either the SIR of the non-serving base station, or a difference between non-serving base station SIR and serving base station SIR.
Abstract:
A method, an apparatus, and a computer program product for wireless communication are provided in connection with improving antenna selection for a UE as part of an access procedure. In an example, a UE with two or more antennas is equipped to obtain receive chain measurements for the two or more antennas associated with the UE when an access procedure is initiated, select an antenna, of the two or more antennas, for transmission based on receive chain measurements for use during at least a portion of the access procedure, and perform the access procedure using the selected antenna. In another example, the UE is equipped to determine that an Access procedure is to be initiated, select an antenna from the two or more antennas based on a selection algorithm, and perform the Access procedure based using the selected antenna. Other aspects, embodiments, and features are also claimed and described.
Abstract:
This disclosure provides systems, methods, and apparatus for antenna switching for simultaneous communication. One apparatus embodiment includes a plurality of antennas including a first antenna, a second antenna, and a third antenna. The wireless communication apparatus further includes a plurality of receive circuits including a first receive circuit, at least two of the plurality of receive circuits each configured to simultaneously receive, with respect to the other, wireless communications from a different one of at least two networks relating to different radio access technologies. The wireless communication apparatus further includes a controller configured to selectively switch the first receive circuit from receiving wireless communications via the first antenna to receive wireless communications via the second antenna based on one or more performance characteristics of at least one of the first antenna and the second antenna. Other aspects, embodiments, and features are also claimed and described.
Abstract:
A systems, methods and apparatus including a plurality of antennas are provided. The antenna system includes a first antenna, a second antenna, and a measurement device. The measurement device is configured to measure at least a first complex value indicative of an impedance matching of the first antenna and a second complex value indicative of an impedance matching of the second antenna. The antenna system includes an antenna selection controller configured to select one of the first antenna and the second antenna. The antenna selection controller making the selection based on the measurement of the first complex value of the first antenna and the measurement of the second complex value of the second antenna.
Abstract:
Aspects of the present disclosure relate to techniques for switching antennas in devices that have multiple antennas for communicating via aggregation of multiple carriers.