Signal shaping device, shaping termination device, signal shaping method, and optical transmission method

A signal shaping and terminating device technology, applied in transmission systems, digital transmission systems, electromagnetic wave transmission systems, etc., can solve problems such as circuit installation problems, achieve the effect of simple structure and improve noise resistance

Active Publication Date: 2019-11-01
MITSUBISHI ELECTRIC CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, in the shaping method called CCDM, the block length needs

Method used

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  • Signal shaping device, shaping termination device, signal shaping method, and optical transmission method
  • Signal shaping device, shaping termination device, signal shaping method, and optical transmission method
  • Signal shaping device, shaping termination device, signal shaping method, and optical transmission method

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0038] Embodiment 1.

[0039] figure 1 It is a figure which shows the structure of the shaping signal transmission system 1 of Embodiment 1 of this invention. The shaping signal transmission system 1 has a transmitting device 10, a transmission path 20, and a receiving device 30. The sending device 10 has a signal shaping device 100 and the receiving device 30 has a shaping termination device 300. The signal shaped by the signal shaping device 100 of the transmitting device 10 is transmitted to the receiving device 30 via the transmission path 20, and returns to the state before shaping in the shaping termination device 300.

[0040] Regarding the method of shaping the signal, two methods are cited. The first method is a method called forward connection in which the signal shaping process is performed after error correction coding and terminated before error correction decoding. The second method is a method called reverse connection in which signal shaping is performed before e...

Example Embodiment

[0066] Implementation mode 2.

[0067] In the first embodiment described above, an example of processing for forward connection has been described. In the processing for forward connection, signal shaping processing is performed after error correction coding, and signal shaping processing is terminated before error correction decoding. In the second embodiment, an example of reverse connection processing is described. In this reverse connection processing, signal shaping processing is performed before error correction coding, and signal shaping processing is terminated after error correction decoding. Hereinafter, the same parts as those in the first embodiment will be assigned the same reference numerals, and description will be omitted, and the parts different from the first embodiment will be mainly described.

[0068] Picture 9 It is a diagram showing the configuration of a signal shaping device 100B according to Embodiment 2 of the present invention. The signal shaping devic...

Example Embodiment

[0072] Implementation mode 3.

[0073] The configuration of the shaping signal transmission system 1 of the third embodiment of the present invention is the same as that of the first embodiment, so the description is omitted. The third embodiment differs from the first embodiment in that, in addition to the selection information S, the detection information P, which is a parity bit for error detection of the selection information S, is added to the shaping block.

[0074] Picture 12 It is a diagram showing the detection information P added by the signal shaping device 100 according to Embodiment 3 of the present invention. in Picture 12 In the example shown, the candidate block of type 1 is selected in the first block BL1, the candidate block of type 2 is selected in the second block BL2, and the candidate block of type 2 is selected in the third block BL3. The candidate block of type 1 is selected among the 4 blocks BL4. Therefore, the value of the selection information S1 of ...

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PUM

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Abstract

A signal shaping device (100) is characterized by comprising: a generation unit (121) that performs a plurality of types of preset processes on blocks in which bit strings of a plurality of systems are cut into preset lengths, and generates a plurality of candidate blocks that are candidates for shaping blocks to be transmitted; a calculation unit (122) that calculates, in candidate block units, the weight of a one-dimensional modulation symbol when a plurality of bits included in a candidate block are converted into the one-dimensional modulation symbol; a selection unit (123) that selects ashaping block from a plurality of candidate blocks on the basis of the weight; an addition unit (124) that adds selection information indicating the selection result to the shaping block; and a symbolmapping unit (130) that converts the plurality of bits included in the shaping block into the one-dimensional modulation symbol and generates a one-dimensional modulation signal.

Description

technical field [0001] The invention relates to a signal shaping device, a shaping termination device, a signal shaping method and an optical transmission method capable of increasing data transmission speed. Background technique [0002] In a communication system, in order to improve the noise resistance during transmission, a technique of shaping a signal for transmission has been proposed. Signal shaping is usually performed on the side of the transmission path rather than error correction. That is, on the transmitting side, signal shaping is performed after error correction encoding, and on the receiving side, shaping termination is performed before error correction decoding. Such a connection method of error correction and signal shaping is called a normal concatenation. Non-Patent Document 1 proposes a method in which signal shaping is performed before error correction coding on the transmitting side, and shaping is terminated after error correction decoding on the r...

Claims

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Application Information

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IPC IPC(8): H04L27/02H04L27/04
CPCH04L27/02H04L27/04H04B10/524H04L25/4917H04B10/5161H04B10/541H04L27/365
Inventor 备海正嗣吉田刚
Owner MITSUBISHI ELECTRIC CORP
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