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Encoder and encoding method based on hadamard-ctc cascading

An encoding method and encoder technology, applied in Hadamard-CTC cascade-based encoders and encoding fields, can solve problems such as weak encoding constraints and difficulty in obtaining high-gain and low-bit-rate codes, so as to improve encoding gain and enhance encoding constraints Effect

Active Publication Date: 2022-04-26
BEIJING INSTITUTE OF TECHNOLOGYGY
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  • Abstract
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AI Technical Summary

Problems solved by technology

[0004] At present, an effective method to achieve low bit rate coding is the concatenated coding structure of Hadamard code and Turbo code. However, this coding structure has weak coding constraints, and it is difficult to obtain low bit rate code with high gain.

Method used

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  • Encoder and encoding method based on hadamard-ctc cascading
  • Encoder and encoding method based on hadamard-ctc cascading

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Embodiment Construction

[0053] In order to make the purpose, technical solutions and advantages of the present invention clearer, the technical solutions in the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the present invention. Obviously, the described embodiments are part of the embodiments of the present invention , but not all examples. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

[0054] figure 1 The structural representation of the coder based on Hadamard-CTC cascading provided for the present invention, as figure 1 As shown, the encoder includes:

[0055] The interleaving unit 100 and the Hadamard encoding unit 110, the output end of the interleaving unit 100 and the first input end of the Hadamard encoding unit 110 are connected with a parity encoding unit 120, an...

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Abstract

The present invention provides a kind of encoder and encoding method based on Hadamard-CTC concatenation, the encoder comprises: an interleaving unit and a Hadamard encoding unit, and a check is connected between the output end of the interleaving unit and the first input end of the Hadamard encoding unit Coding unit, and the output end of interleaving unit is also connected with the second input end of Hadamard coding unit; Interleaving unit is used for interleaving the original information bit of input, outputs interleaving information bit; Checking coding unit is used for interleaving information bit Packet checksum and duobinary encoding, and output check digit bits; the Hadamard encoding unit is used to perform Hadamard encoding on interleaved information bits combined with check digit bits, and output Hadamard encoded symbols. Therefore, the coding constraint can be enhanced, and a high-gain low-bit-rate code can be obtained, which can be well used in frequency-hopping communication anti-jamming technology.

Description

technical field [0001] The invention relates to the field of communication technology, in particular to a Hadamard-CTC cascade-based encoder and an encoding method. Background technique [0002] Tactical ad-hoc network is an important means of communication support for future wars. It has the characteristics of flexibility, easy deployment, and swarm intelligence. However, it must also overcome the adverse effects of high dynamics, large fading, and strong interference. As the number of access equipment and the demand for communication rates continue to grow, intersymbol interference caused by interfering signals in the frequency band and multipath effects will seriously affect communication quality, while traditional time division multiple access and frequency division multiple access Access and other methods are not effective in anti-interference and resistance to fading. [0003] Frequency hopping technology uses a pseudo-random code sequence for frequency shift keying, ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H03M13/27H03M13/29H03M9/00
CPCH03M13/2732H03M13/2996H03M9/00
Inventor 张家豪董新虎王帅苗夏箐李文贞
Owner BEIJING INSTITUTE OF TECHNOLOGYGY
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