Viterbi decoder using circulation type decoding units connected in parallel
First Claim
1. An analog Viterbi decoder, comprising:
- a plurality of decoding units, provided with a plurality of processing parts each having a plurality of cells that are vertically arranged so as to correspond to respective nodes on a trellis diagram, that decode analog input data using an analog signal processing cell having a circulation type connection structure in which a last processing part is connected to a first processing part;
a control unit that performs in parallel a sequential designation of the plurality of processing parts with respect to the plurality of decoding units in accordance with an external input clock signal;
an analog data storage unit including a plurality of capacitors connected in parallel with the plurality of processing parts that are provided in the plurality of decoding units; and
a first switch unit that stores analog input data in a specific capacitor of the analog data storage unit that is controlled by the control unit.
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Abstract
An analog Viterbi decoder for decoding an analog signal is provided that includes a plurality of decoding units, provided with a plurality of processing parts each having a plurality of cells arranged to correspond to respective nodes of a trellis diagram, for decoding analog input data using an analog signal processing cell having a circulation type connection structure in which the last processing part is connected to the first processing part; a control unit for performing in parallel a sequential designation of the processing parts with respect to the decoding units; an analog data storage unit including a plurality of capacitors connected in parallel with the processing parts provided in the decoding units; and a first switch unit for storing analog input data in a specific capacitor of the analog data storage units under the control of the control unit. Accordingly, the decoding speed can be remarkably improved.
7 Citations
7 Claims
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1. An analog Viterbi decoder, comprising:
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a plurality of decoding units, provided with a plurality of processing parts each having a plurality of cells that are vertically arranged so as to correspond to respective nodes on a trellis diagram, that decode analog input data using an analog signal processing cell having a circulation type connection structure in which a last processing part is connected to a first processing part;
a control unit that performs in parallel a sequential designation of the plurality of processing parts with respect to the plurality of decoding units in accordance with an external input clock signal;
an analog data storage unit including a plurality of capacitors connected in parallel with the plurality of processing parts that are provided in the plurality of decoding units; and
a first switch unit that stores analog input data in a specific capacitor of the analog data storage unit that is controlled by the control unit. - View Dependent Claims (2, 3, 4, 5)
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6. A decoder, comprising:
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a plurality of decoding units, provided with a plurality of processing parts each having a plurality of cells that are arranged to correspond to respective nodes on a trellis diagram, that decode input data using a signal processing cell having a circulation type connection structure in which a last processing part is connected to a first processing part;
a control unit that performs in parallel a sequential designation of the plurality of processing parts with respect to the plurality of decoding units; and
a data storage unit including a plurality of storage devices connected in parallel with the plurality of processing parts that are provided in the plurality of decoding units. - View Dependent Claims (7)
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Specification