Bit labeling for amplitude phase shift constellation used with low density parity check (ldpc) codes
CA 2457420 C · Owner: Sun, Feng-Wen · Inventors: Sun, Feng-Wen; Eroz, Mustafa; Lee, Lin-Nan
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An approach is provided for bit labeling of a signal constellation. A transmitter (200) generates encoded signals using according to one , embodiment, a structured parity check matrix of a Low Density Parity Check (LDPC) code. The transmitter (200) includes an encoder (203) for transforming an input message into a codeword represented by a plurality of set of bits. The transmitter (200) includes logic for mapping non-sequentially (e.g. interleaving) one set of bits into a higher order constellation (Quadrature Phase Shift Keying (QPSK), 8-PSK, 16-APSK (Amplitude Phase Shift Keying) 32-, APSK, etc.), wherein a symbol of the higher order constellation corresponding to the one set of …
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Listed from its CIPO record in Patent Yard's archive of Canadian patents past their term. Its claims, description and drawings are in the CIPO record and on Google Patents, and the Claude kit works from them.
Why it's free to use
- Filed July 3, 2003 and granted August 23, 2016. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended July 3, 2023.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by July 3, 2025.
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Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.