{"schema_version":"1.0","canonical_url":"https://patentable.app/patents/US-8514690","patent":{"patent_number":"US-8514690","title":"M-ary orthogonal keying system","assignee":null,"inventors":[],"filing_date":"2011-04-05T00:00:00.000Z","publication_date":"2013-08-20T00:00:00.000Z","cpc_codes":["H04L","H04J","H04L","H04L","H04L","H04L"],"num_claims":14,"abstract":"A digital modulation system provides enhanced multipath performance by using modified orthogonal codes with reduced autocorrelation sidelobes while maintaining the cross-correlation properties of the modified codes. For example, the modified orthogonal codes can reduce the autocorrelation level so as not to exceed one-half the length of the modified orthogonal code. In certain embodiments, an M-ary orthogonal keying (MOK) system is used which modifies orthogonal Walsh codes using a complementary code to improve the auto-correlation properties of the Walsh codes, thereby enhancing the multipath performance of the MOK system while maintaining the orthogonality and low cross-correlation characteristics of the Walsh codes."},"analysis":{"summary":null,"layman_explanation":null,"technical_analysis":null,"business_analysis":null,"faqs":null,"topics":[],"tech_cluster":null},"seo":{"title":"M-ary orthogonal keying system","description":"A digital modulation system provides enhanced multipath performance by using modified orthogonal codes with reduced autocorrelation sidelobes while maintaining the cross-correlation properties of the ","keywords":[]},"attribution":{"source":"Patentable","source_url":"https://patentable.app","canonical_url":"https://patentable.app/patents/US-8514690","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-8514690","citation_suggestion":"Patentable. \"M-ary orthogonal keying system\" (US-8514690). https://patentable.app/patents/US-8514690","copyright_holder":"Nomic Interactive Technology LLC"},"links":{"html":"https://patentable.app/patents/US-8514690","json":"https://patentable.app/api/llm-context/US-8514690","site":"https://patentable.app","llms_txt":"https://patentable.app/llms.txt"},"generated_at":"2026-05-31T21:55:00.469Z"}