Invention Grant
- Patent Title: Method and device for transmitting information over a communication channel with variable impedance
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Application No.: US14961985Application Date: 2015-12-08
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Publication No.: US09705533B2Publication Date: 2017-07-11
- Inventor: Mark Wallis
- Applicant: STMICROELECTRONICS (ROUSSET) SAS
- Applicant Address: FR Rousset
- Assignee: STMicroelectronics (Rousset) SAS
- Current Assignee: STMicroelectronics (Rousset) SAS
- Current Assignee Address: FR Rousset
- Agency: Slater Matsil, LLP
- Priority: FR1555084 20150604
- Main IPC: H04B1/00
- IPC: H04B1/00 ; H04L5/00 ; H04B3/54

Abstract:
A method includes digital/analog conversion of a digital signal modulated by information to provide a modulated initial analog signal having a crest factor greater than one, and amplification of the initial analog signal to provide an amplified modulated signal. A modulated channel analog signal derived from the modulated amplified analog signal is transmitted over a communications channel, with impedance of the communications channel varying during the transmission. The method further includes at least one determination during the transmission of a peak-clipping rate of the amplified analog signal over at least one time interval, and an adjustment of a level of the initial analog signal as a function of the determined peak-clipping rate.
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