Forward and backward smooth decoding method, device, and system
AssigneeShenzhen Shen Zhen Kuang-Chi Hezhong Technology Ltd
InventorsRuopeng Liu, Chunlin Ji, Xingan Xu, Shasha Zhang
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Abstract
The present application discloses a forward and backward smooth decoding method and device suitable for an OvXDM system, and a system. Importance weights of particles in a particle set corresponding to a symbol are calculated by using a forward process and a backward process, and screening is performed with reference to forward importance weights of particles and backward importance weights of particles, to output a final decoding sequence.
Claims20
A forward and backward decoding method being executed by a computer, the forward and backward decoding method comprising the following steps:
- a forward step:
- starting from a first symbol to a last symbol in an estimation sequence, sequentially calculating importance weights of particles in a particle set corresponding to each symbol, to obtain importance weights of particles in a forward process;
- a backward step:
- starting from the last symbol to the first symbol in the estimation sequence, sequentially calculating importance weights of particles in a particle set corresponding to each symbol with reference to the importance weights of particles obtained in the forward step, to obtain importance weights of particles in a backward process;
- and
- an output step:
- obtaining an estimated value corresponding to each symbol, and outputting a final decoding sequence.
A forward and backward decoding device being implemented by a computer, the forward and backward decoding device comprising:
- a forward unit, configured to:
- starting from a first symbol to a last symbol in an estimation sequence, sequentially calculate importance weights of particles in a particle set corresponding to each symbol, to obtain importance weights of particles in a forward smoothing process;
- a backward unit, configured to:
- starting from the last symbol to the first symbol in the estimation sequence, sequentially calculate importance weights of particles in a particle set corresponding to each symbol with reference to the importance weights of particles obtained by the forward unit, to obtain importance weights of particles in a backward smoothing process;
- and
- an output unit, configured to output a final decoding sequence.
Dependencies are inferred from the claim text.