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A novel information transmission method adopting a pseudorandom sequence

A pseudo-random sequence and information transmission technology, applied in the field of wireless communication, to achieve the effect of ensuring accuracy and security

Active Publication Date: 2019-05-03
UNIV OF ELECTRONICS SCI & TECH OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Common channel coding techniques, such as LDPC, do not work well at low SNR

Method used

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  • A novel information transmission method adopting a pseudorandom sequence
  • A novel information transmission method adopting a pseudorandom sequence
  • A novel information transmission method adopting a pseudorandom sequence

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0067] A novel method of information transmission using pseudo-random sequences at low signal-to-noise ratios. The sending end has to send information K, and after the entire transmission scheme and device, the receiving end will accept the information and restore the sent information K'.

[0068] figure 1 It is the processing flowchart of this scheme, including the following steps:

[0069] Step 101, channel coding steps:

[0070] see figure 2 , which specifically includes the following steps:

[0071] Step 101-1, information splitting steps:

[0072] Decompose all the information to be sent into several kbit information, assuming that the information K to be sent can be decomposed into s kbit information K=(K 1 , K 2 ,...,K s ),in is the i-th kbit information.

[0073] Step 101-2, m-sequence encoding steps:

[0074] The decomposed kbit information is f(x)=c through the primitive polynomial k x k +…+c 1 x+c 0 The linear feedback shift register, the output of t...

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Abstract

The invention discloses a novel information transmission method adopting a pseudorandom sequence. The core of the method is that a pseudorandom sequence is adopted for coding, and a synchronization scheme based on a sliding window and secondary correlation is adopted for synchronization. The whole transmission scheme comprises ten steps of channel coding, synchronous framing, pulse forming, up-sampling, up-conversion, down-conversion, down-sampling, matched filtering, desynchronization and decoding. In the channel coding step, a pseudorandom sequence is adopted for coding, after coding, any bit number larger than the order number of the primitive polynomial can be used as information for transmission, and it can be guaranteed that a receiving end conducts accurate decoding.

Description

technical field [0001] The invention relates to the field of wireless communication, in particular to the communication technology under extremely low signal-to-noise ratio. Background technique [0002] Minimum communication is committed to starting and maintaining minimum communication capabilities when conventional communication methods cannot work normally in harsh electromagnetic environments with strong noise and strong interference. The minimum communication needs to be able to resist as much noise and interference as possible under a certain bit error rate requirement, to achieve a communication speed that meets the real-time information, and to have a certain anti-interception probability. For error-correcting coding, the realization of minimum communication requires the complexity of coding and decoding algorithms to be low, the randomness of codewords to be good, and the signal-to-noise ratio to meet the requirements of bit error rate, etc. [0003] Conventional ...

Claims

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Application Information

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IPC IPC(8): H04L1/00
Inventor 周亮韩承昊李胜强张哲周林
Owner UNIV OF ELECTRONICS SCI & TECH OF CHINA