Coder for digital communication

A coding device and digital communication technology, which is applied in the direction of line failure/interference reduction, synchronization/start-stop system, baseband system components, etc., can solve problems such as complex circuits and incompatible coding conversions, and achieve circuit area savings and versatility , the effect of simple circuit

Inactive Publication Date: 2009-10-14
SANECHIPS TECH CO LTD
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

[0019] The purpose of the present invention is to provide a coding device for digital communication to solve the problems of incompatible code conversion and complicated circuits in the prior art

Method used

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  • Coder for digital communication
  • Coder for digital communication
  • Coder for digital communication

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Embodiment Construction

[0036] Below according to accompanying drawing and embodiment the present invention will be described in further detail:

[0037] according to figure 2 , image 3 , Figure 4 , Figure 5 , Figure 6 and Figure 7 , the present invention includes a continuous zero detection module 1, a damage point formation module 2, a replacement node selection module 4 and a unipolar / bipolar conversion output module 3, the continuous zero detection module 1 detects the continuous "0" situation of the data stream, and outputs data The flow signal shift_out and the zero-connecting signal all-zero, the damage point forming module 2 is connected with the unipolar / bipolar conversion output module 3, and the damage point forming module 2 generates a corresponding counting control signal according to whether the zero-connecting signal all-zero is effective, replacing the node The selection module 4 generates a control signal odd-b according to the values ​​of the data stream signal shift_out ...

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Abstract

An encoding device for digital communication related to an optical synchronous digital transmission system, comprising a continuous zero detection module, a damage point formation module and a single / bipolar conversion output module, the continuous zero detection module detects continuous "0"s of data streams In this case, the output data flow signal shift_out and the zero-connection signal all-zero, the damage point forming module is connected with the unipolar / bipolar transformation output module, and the unipolar / bipolar transformation output module receives the data flow signal shift_out to complete the positive and negative dual-rail output. In that: it also includes a replacement section selection module, the replacement section selection module generates a control signal odd-b according to the values ​​of the data stream signal shift_out and the zero-connection signal all-zero, and sends it to the zero-connection detection module to determine whether it is in the shift register Insert "1", the logic of the present invention is clear, the circuit is simple, it can solve the encoding problem of the baseband transmission signal of the international multi-standard system, and can reduce the cost of related integrated circuit chips and communication systems.

Description

technical field [0001] The invention relates to an optical synchronous digital transmission system and a quasi-synchronous digital communication system, in particular to a coding device for digital communication of baseband transmission coding. Background technique [0002] In many occasions of modern communication, the baseband signal can be transmitted in some channels without modulation. Baseband transmission is the most basic transmission mode in a digital communication system. The baseband transmission system is an important part of a digital communication system. It mainly includes five parts: a waveform converter, a transmission filter, a channel, a reception filter, and a sampling decision device. In order to make the digital signal suitable for the transmission of the channel, the code type conversion is generally performed through a code type converter, and the binary pulse sequence is changed into a bipolar code, and then sent to the baseband transmission channel ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L25/38H04L25/08
Inventor 邓春松
Owner SANECHIPS TECH CO LTD
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