Cyclic trellis coded modulation
November 17, 2015. 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 ReferencesMultiple trellis coded modulation Trellis coding arrangement Trellis coding method and arrangement for fractional bit rates Trellis coded modulation for transmission over fading mobile satellite channel Cellular radiotelephone diagnostic system Trellis decoder Subscriber RF telephone system for providing multiple speech and/or data signals simultaneously over either a single or a plurality of RF channels Convolutional decoder using soft-decision decoding with channel state information Joint data and channel estimation using fast blind trellis search Trellis coding technique to increase adjacent channel interference protection ratio in land mobile radio systems under peak power constraints InventorAssigneeApplicationNo. 581477 filed on 11/17/1995US Classes:714/792, Trellis code375/265Trellis encoder or Trellis decoderExaminersPrimary: Moise, Emmanuel L.Attorney, Agent or FirmForeign Patent References
International ClassesG06F 011/10H03M 013/12 AbstractA universal method of trellis encoding signals mapped according to any signal constellation format involves constructing an encoder output table and a state transition table. The encoder output table defines the output symbol of an encoder given the input symbol and the present state of the encoder, while the state transition table defines the next state of the encoder given the present state of the encoder and the input applied to the encoder. The output table and the next state table are constructed with the objective of providing maximal distances between the branches of the trellis diagram without any regards for the shift register implementation of the code. Cyclic trellis-coded modulation is an example of such codes without feed-forward or feed-back shift register implementations, and with equal or better performance than "optimal" shift register trellis codes with 16 states or less. The cyclic trellis codes for both AWGN and Rayleigh fading applications can be constructed for any signal constellation without resorting to exhaustive searches.Other References
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