Wakeup radio transmit diversity
AssigneeQUALCOMM Incorporated
InventorsStephen Jay Shellhammer, Bin Tian
Life of this patent
Estimating the term…
Abstract
Methods, systems, and devices for wireless communication are described. A transmitting device may transmit a wakeup message to another device. The wakeup message may be transmitted using a transmit diversity scheme in accordance with aspects of the present disclosure. The transmit diversity may, for example, include a cyclic shift diversity scheme, a phase rotation scheme, a symbol generation scheme, or combinations thereof. The transmit diversity may in some cases improve a communication range of the wakeup message or otherwise benefit the wireless communications system.
Claims28
A first wireless device, comprising:
- a processor;
- memory in electronic communication with the processor;
- and
- instructions stored in the memory and executable by the processor to cause the first wireless device to:
- identify, for a first portion of a wakeup radio frame, a first set of cyclic delay values corresponding to a plurality of antennas of the first wireless device;
- identify, for a second portion of the wakeup radio frame, a second set of cyclic delay values corresponding to the plurality of antennas;
- apply the first set of cyclic delay values to symbols of the first portion of the wakeup radio frame for the plurality of antennas and the second set of cyclic delay values to symbols of the second portion of the wakeup radio frame for the plurality of antennas to generate cyclically-shifted wakeup signals for the plurality of antennas;
- and
- transmit the cyclically-shifted wakeup signals to a second wireless device using the plurality of antennas.
A method for wireless communication, comprising:
- identifying, for a first portion of a wakeup radio frame, a first set of cyclic delay values corresponding to a plurality of antennas of a first wireless device;
- identifying, for a second portion of the wakeup radio frame, a second set of cyclic delay values corresponding to the plurality of antennas;
- applying the first set of cyclic delay values to symbols of the first portion of the wakeup radio frame for the plurality of antennas and the second set of cyclic delay values to symbols of the second portion of the wakeup radio frame for the plurality of antennas to generate cyclically-shifted wakeup signals for the plurality of antennas;
- and
- transmitting the cyclically-shifted wakeup signals to a second wireless device using the plurality of antennas.
A first wireless device, comprising:
- means for identifying, for a first portion of a wakeup radio frame, a first set of cyclic delay values corresponding to a plurality of antennas of the first wireless device;
- means for identifying, for a second portion of the wakeup radio frame, a second set of cyclic delay values corresponding to the plurality of antennas;
- means for applying the first set of cyclic delay values to symbols of the first portion of the wakeup radio frame for the plurality of antennas and the second set of cyclic delay values to symbols of the second portion of the wakeup radio frame for the plurality of antennas to generate cyclically-shifted wakeup signals for the plurality of antennas;
- and
- means for transmitting the cyclically-shifted wakeup signals to a second wireless device using the plurality of antennas.
A non-transitory computer-readable medium storing code for wireless communication, the code comprising instructions executable by a processor to:
- identify, for a first portion of a wakeup radio frame, a first set of cyclic delay values corresponding to a plurality of antennas of the first wireless device;
- identify, for a second portion of the wakeup radio frame, a second set of cyclic delay values corresponding to the plurality of antennas;
- apply the first set of cyclic delay values to symbols of the first portion of the wakeup radio frame for the plurality of antennas and the second set of cyclic delay values to symbols of the second portion of the wakeup radio frame for the plurality of antennas to generate cyclically-shifted wakeup signals for the plurality of antennas;
- and
- transmit the cyclically-shifted wakeup signals to a second wireless device using the plurality of antennas.
Dependencies are inferred from the claim text.