Invention Grant
- Patent Title: Systems and methods for multi-carrier signal echo management using pseudo-extensions
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Application No.: US15833832Application Date: 2017-12-06
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Publication No.: US10476631B2Publication Date: 2019-11-12
- Inventor: Thomas H. Williams , Gregory Charles White
- 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: H04W72/04
- IPC: H04W72/04 ; H04L1/00 ; H04L27/26 ; H04L25/03

Abstract:
A receiver is configured to capture a plurality of linearly distorted OFDM symbols transmitted over a signal path. The receiver forms the captured OFDM symbols into an overlapped compound data block that includes payload data and at least one pseudo-extension, processes the overlapped compound block with circular convolution in the time domain using an inverse channel response, or frequency domain equalization, to produce an equalized compound block, and discards end portions of the equalized block to produce a narrow equalized block. The end portion corresponds with the pseudo-extension, and the narrow block corresponds with the payload data. The receiver cascades multiple narrow equalized blocks to form a de-ghosted signal stream of OFDM symbols. The OFDM symbols may be OFDM or OFDMA, and may or may not include a cyclic prefix, which will have a different length from the pseudo-extension.
Public/Granted literature
- US20180205490A1 SYSTEMS AND METHODS FOR MULTI-CARRIER SIGNAL ECHO MANAGEMENT USING PSEUDO-EXTENSIONS Public/Granted day:2018-07-19
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