Unlock instant, AI-driven research and patent intelligence for your innovation.

Method and system for applying soft decision to sawtooth decoding

An application method and application system technology, applied in the application method and system field of soft decision in sawtooth decoding, can solve the problem of loss of statistical characteristic information of waveform signal, decoder cannot make full use of demodulator matching filter, and affect decoding issues such as device error probability, to avoid the effect of misjudgment

Active Publication Date: 2017-04-05
SHENZHEN UNIV
View PDF6 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The hard decision result of the demodulator loses the statistical characteristic information about channel interference contained in the waveform signal, and the decoder cannot make full use of the output of the matching filter of the demodulator, thus affecting the error probability of the decoder

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Method and system for applying soft decision to sawtooth decoding
  • Method and system for applying soft decision to sawtooth decoding
  • Method and system for applying soft decision to sawtooth decoding

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0029] The invention discloses an application method of soft decision in sawtooth decoding, comprising the following steps:

[0030] The step of generating the initial information bit equation: using the sawtooth decoded shift matrix to generate the user's initial information bit equation;

[0031] The step of obtaining the verification equation: using the initial information bit equation to obtain the verification equation required by the soft decision;

[0032] Soft-judgment processing steps: use soft-judgment decoding to obtain the information of each bit of the verification equation, and then solve it back to obtain the initial information of all user groups.

[0033] Such as figure 1 As shown, as a specific embodiment of the present invention, the step of generating the initial information bit equation includes the following initialization step and calculation equation set step.

[0034] Initialization step: initialize the number of users K, group length L, and shift ma...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention provides a method and system for applying soft decision to sawtooth decoding, the method comprising the steps of: an initial information bit equation generating step of generating the initial information bit equation of a user by using the shift matrix of sawtooth decoding; a verification equation obtaining step of obtaining a verification equation required by the soft decision by using the initial information bit equation; a soft decision processing step of obtaining the information of each bit of the verification equation by using soft decision decoding and obtaining the initial information of all user groups by means of back substitution. The method and system have beneficial effects that the soft decision avoids the influence of the post-demodulation erroneous judgment and sends it directly to the decoder for decoding; the soft decision makes full use of the information of the channel output signal and increases the performance by 2 to 3 dB.

Description

technical field [0001] The invention relates to the technical field of wireless communication, in particular to an application method and system of soft decision in sawtooth decoding. Background technique [0002] 1. Aloha, the Aloha protocol is the simplest data packet transmission protocol. Any user has a data packet to send at any time, and it immediately intervenes in the channel to send it. After sending, wait for an acknowledgment on the same channel or on a separate feedback channel. If within a given time zone, no acknowledgment response from the other party is received, the data packet just sent is resent. The pure Aloha protocol is simple and easy to implement, but it is very easy to conflict, and the maximum channel utilization rate does not exceed 18.4%. The slotted Aloha protocol uses the clock to unify the user's data transmission, thereby avoiding the arbitrariness of the user's data transmission and reducing the possibility of data conflicts. Possibility, t...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): H04L1/00H04L25/03
Inventor 代明军卢双双王晖陈彬林晓辉
Owner SHENZHEN UNIV