{"schema_version":"1.0","canonical_url":"https://patentable.app/patents/US-9735921","patent":{"patent_number":"US-9735921","title":"Ultra-high speed optical transport employing LDPC-coded modulation with non-uniform signaling","assignee":null,"inventors":[],"filing_date":"2016-04-25T00:00:00.000Z","publication_date":"2017-08-15T00:00:00.000Z","cpc_codes":["H04L","H04B","H04L","H04L","H04L"],"num_claims":4,"abstract":"A low-density parity-check (LDPC) coded bit-interleaved coded modulation with iterative decoding (BICM-ID) scheme with nonuniform signaling which is effected by mapping simple variable-length prefix codes onto the constellation. By employing Huffman procedure(s), prefix codes can be designed to approach optimal performance. Experimental evaluations of the schemes demonstrate that the nonuniform scheme performs better than 8-QAM by at least 8.8 dB."},"analysis":{"summary":null,"layman_explanation":null,"technical_analysis":null,"business_analysis":null,"faqs":null,"topics":[],"tech_cluster":null},"seo":{"title":"Ultra-high speed optical transport employing LDPC-coded modulation with non-uniform signaling","description":"A low-density parity-check (LDPC) coded bit-interleaved coded modulation with iterative decoding (BICM-ID) scheme with nonuniform signaling which is effected by mapping simple variable-length prefix c","keywords":[]},"attribution":{"source":"Patentable","source_url":"https://patentable.app","canonical_url":"https://patentable.app/patents/US-9735921","license":"CC-BY-4.0-like","license_terms":"AI-generated analysis on this page (summary, layman_explanation, technical_analysis, business_analysis, faqs) may be reused with attribution and a visible link back to the canonical URL above. Patent abstracts, claims, and bibliographic data are USPTO public domain.","required_link":"https://patentable.app/patents/US-9735921","citation_suggestion":"Patentable. \"Ultra-high speed optical transport employing LDPC-coded modulation with non-uniform signaling\" (US-9735921). https://patentable.app/patents/US-9735921","copyright_holder":"Nomic Interactive Technology LLC"},"links":{"html":"https://patentable.app/patents/US-9735921","json":"https://patentable.app/api/llm-context/US-9735921","site":"https://patentable.app","llms_txt":"https://patentable.app/llms.txt"},"generated_at":"2026-06-06T06:21:29.360Z"}