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APPARATUS FOR UPLINK MULTI-ANTENNA COMMUNICATION BASED ON A HYBRID COUPLER AND A TUNABLE PHASE SHIFTER
APPARATUS FOR UPLINK MULTI-ANTENNA COMMUNICATION BASED ON A HYBRID COUPLER AND A TUNABLE PHASE SHIFTER
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机译:基于混合耦合器和可调相移器的上行多天线通信装置
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摘要
Embodiments of front-end module (FEM) circuitry and a communication device are generally described herein. In some embodiments, the FEM circuitry may be configured to provide uplink (UL) multiple-input multiple-output (MIMO) signals and/or UL carrier aggregation (CA) signals for transmission by the communication device. The FEM circuitry may comprise a hybrid coupler to generate a first antenna transmit signal and a second antenna transmit signal. The FEM circuitry may further comprise one or more tunable phase shifters. In some embodiments, the phase shifters may phase-shift a first radio frequency (RF) signal and a second RF signal according to a 90 degree phase difference to generate the hybrid coupler input signals. Accordingly, the antenna transmit signals may be transmitted according to the UL-MIMO configuration.
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