Invention Grant
- Patent Title: Systems and methods for nonlinear distortion discovery in active carriers
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Application No.: US16249734Application Date: 2019-01-16
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Publication No.: US10659264B2Publication Date: 2020-05-19
- Inventor: Thomas H. Williams
- Applicant: CABLE TELEVISION LABORATORIES, INC
- Applicant Address: US CO Louisville
- Assignee: Cable Television Laboratories, Inc
- Current Assignee: Cable Television Laboratories, Inc
- Current Assignee Address: US CO Louisville
- Agency: Armstrong Teasdale LLP
- Main IPC: H04K1/10
- IPC: H04K1/10 ; H04L27/28 ; H04L27/01 ; H04L1/00 ; H04L27/38 ; H04L27/26 ; H04L1/20 ; H04L25/02
Abstract:
A digital transmission system includes a transmitter configured to transmit an orthogonal frequency division multiplexing (OFDM) signal along a signal path, a receiver for receiving the OFDM signal from the transmitter and extracting OFDM symbols from the received OFDM signal, and a diagnostic unit configured to (i) demodulate the received OFDM signal to create an ideal signal, (ii) compare the received OFDM signal with the ideal signal to calculate an error signal, (iii) cross-correlate the error signal with the ideal signal, and (iv) determine a level nonlinear distortion from one of the transmitter and the signal path based on the correlation of the error signal with the ideal signal.
Public/Granted literature
- US20190149373A1 SYSTEMS AND METHODS FOR NONLINEAR DISTORTION DISCOVERY IN ACTIVE CARRIERS Public/Granted day:2019-05-16
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