Invention Grant
- Patent Title: Devices and methods employing hermetic transforms for encoding and decoding digital information in spread-spectrum communication systems
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Application No.: US15389927Application Date: 2016-12-23
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Publication No.: US10447340B2Publication Date: 2019-10-15
- Inventor: Harvey C. Woodsum
- Applicant: VertoCOMM, Inc.
- Applicant Address: US MA Weston
- Assignee: VERTOCOMM, INC.
- Current Assignee: VERTOCOMM, INC.
- Current Assignee Address: US MA Weston
- Agency: Wilmer Cutler Pickering Hale and Dorr LLP
- Main IPC: H04B1/7093
- IPC: H04B1/7093 ; H04B1/707 ; H04B1/7095 ; H04B1/7103 ; H04L27/18 ; H04L27/34
Abstract:
In a direct sequence spread-spectrum (DSSS) systems, such as CDMA, information is encoded in symbols using phase shift keying or quadrature amplitude modulation. Further, a transmitter applied a selected time shifted lag to each symbol to convey additional information. A receiver detects both the symbol data and the lag value. The receiver can use a hermetic matched filter matrix to identify the lag.
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