Invention Application
- Patent Title: Intermodulation Cancellation of Third-order Distortion in an FDD Receiver
- Patent Title (中): FDD接收机三阶失真的互调取消
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Application No.: US14300290Application Date: 2014-06-10
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Publication No.: US20150358047A1Publication Date: 2015-12-10
- Inventor: Konstantinos Sarrigeorgidis , Tarik Tabet , Syed A. Mujtaba
- Applicant: Apple Inc.
- Main IPC: H04B1/54
- IPC: H04B1/54 ; H04B1/12

Abstract:
A transceiver device may include a transmit path that generates a modulated transmit signal based on a baseband signal, and a receive path that receives a receive signal, which is subject to third-order order distortion caused by intermodulation noise resulting from a continuous wave blocker intermodulating with transmit leakage from the transmit path. The transceiver may also include a compensation path that models portions of the transmit path and the receive path, and generates a replica signal representative of the third-order order distortion according to at least a specified function and the modeled portions of the transmit path and the receive path. The compensation path also filters the replica signal and subtracts the filtered replica signal from the receive signal to eliminate the third-order order distortion caused by the intermodulation noise. The filtering of the replica signal may be performed by programmable finite impulse response filters.
Public/Granted literature
- US09525453B2 Intermodulation cancellation of third-order distortion in an FDD receiver Public/Granted day:2016-12-20
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