Forward error correction arrangement (FEC) for multipoint to single point communication systems
August 25, 2017. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent ReferencesTrellis coded modulation for transmission over fading mobile satellite channel Error correction and channel restoration apparatus for T1 digital links Quadrature amplitude modulated data for standard bandwidth television channel Point-to-multipoint performance monitoring and failure isolation system Asymmetric hybrid access system and method Multicarrier modulation transmission system with variable delay Digital communication system and a primary station for use in such a system Systematic convolution interleavers and deinterleavers Implied interleaving, a family of systematic interleavers and deinterleavers Patent #: 5898710 InventorsAssigneeApplicationNo. 917664 filed on 08/25/1997US Classes:714/776, For packet or frame multiplexed data375/354, SYNCHRONIZERS711/157, Interleaving714/701, Data formatting to improve error detection correction capability714/752Forward correction by block codeExaminersPrimary: Moise, Emmanuel L.Attorney, Agent or FirmInternational ClassH03M 013/00AbstractA forward error correction (FEC) system and method for use in a multipoint-to-point frame based synchronized transmission communication system in which data from users are sent in selected portions of data frames having coded symbols added thereto by encoders associated with each user. The number of bits per user assigned portions of data frames is established as an integer number of FEC code symbols. The interleaving depth is set equal to a multiple of the total number of code symbols sent by a user in a data frame. The encoders are synchronized such that all of the encoders start processing associated interleaving frames at the same time. In exemplary embodiments, the communication systems include DWMT and TDM communication systems.Field of SearchData formatting to improve error detection correction capabilityIncluding forward error correction capability Forward correction by block code Double encoding codes (e.g., product, concatenated) Burst error correction For packet or frame multiplexed data Reed-Solomon code Trellis code Switching input signals having different aggregate bit rates Ring or loop forms backbone for interconnecting other networks Assembly or disassembly of messages having address headers Using synchronization information contained in a frame Plural channels for transmission of a single pulse train Quadrature amplitude modulation Multilevel Trellis encoder or Trellis decoder More than two phases Quadrature amplitude modulation SYNCHRONIZERS Plurality of synchronization words Synchronizer pattern recognizers Interleaving | |
