公开(公告)号：US20220271783A1

公开(公告)日：2022-08-25

申请号：US17489381

申请日：2021-09-29

Applicant: Texas Instruments Incorporated

Inventor： Sarma Sundareswara GUNTURI ,  Venkateshwara Reddy POTHAPU ,  Chandrasekhar SRIRAM ,  Raju Kharataram CHAUDHARI ,  Sai Vaibhav BATCHU ,  Pankaj GAUR

IPC: H04B1/04 ,  H03G3/30

Abstract: A TX-TX pre-compensation system that estimates unwanted coupling in a victim transmit chain caused by an aggressor transmit chain and injects a pre-compensation signal to cancel out the estimated coupling. In some embodiments, a signal measurement module estimates the amplitude, phase, and envelope delay of the coupling and an isolation pre-compensation module generates the pre-compensation signal based on the estimated amplitude, the estimated phase, the estimated envelope delay, and the difference between the carrier frequencies of the transmit chains. Since the phase of the coupling may be affected by the carrier frequency of the transmit chains, in some embodiments the phase of the pre-compensation signal is adjusted in response to a change in carrier frequency. Since the amplitude of the coupling may be affected by attenuator gain settings, in some embodiments the amplitude of the pre-compensation signal may be adjusted in response to a change in attenuator gain setting.

公开(公告)号：US20230387975A1

公开(公告)日：2023-11-30

申请号：US17829218

申请日：2022-05-31

Applicant: TEXAS INSTRUMENTS INCORPORATED

Inventor： Sarma Sundareswara GUNTURI ,  Divyeshkumar Mahendrabhai PATEL ,  Sai Vaibhav BATCHU ,  Divyansh Deepak JAIN ,  Aswath VS

IPC: H04B7/06

CPC classification number: H04B7/06

Abstract: Examples of this description provide for a method. In some examples, the method includes determining, via a circuit, an estimated value of harmonic coupling in a transmitted signal via a feedback signal path that receives the transmitted signal and performing pre-compensation for the harmonic coupling based on the estimated value, the pre-compensation performed in the circuit.