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

Decoding method and device, modulation and demodulation method and system based on overlapping multiplexing

A technology of complex modulation and decoding, which is applied in devices, modulation and demodulation methods and systems, and in the field of decoding methods based on overlapping multiplexing, which can solve problems such as a large number of storage resources, impossibility of practical use, and increased decoding complexity

Active Publication Date: 2020-10-27
SHEN ZHEN KUANG CHI HEZHONG TECH LTD
View PDF13 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0025] The present application provides a decoding method and device based on overlapping multiplexing, as well as a modulation and demodulation method and system, which solves the problem that in traditional decoding methods, for example, when Viterbi decoding is used, although the decoding performance is better, it requires a large number of For storage resources (path storage and distance storage), the decoding complexity increases exponentially with the number of overlapping multiplexing K, and the problem of increasing the decoding rate and spectral efficiency is contradictory and cannot be practical. It can be improved on the premise of ensuring spectral efficiency. decoding rate

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
  • Decoding method and device, modulation and demodulation method and system based on overlapping multiplexing
  • Decoding method and device, modulation and demodulation method and system based on overlapping multiplexing
  • Decoding method and device, modulation and demodulation method and system based on overlapping multiplexing

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0080] Viterbi decoding is the most widely used method in convolutional codes, and its basic idea is to traverse the Trellis graph ( Figure 7 is all paths in the Trellis diagram of OvTDM), by comparing the distances between multiple branches reaching each state and the correct path during the state transition process of the Trellis diagram, only the path with the smallest distance is kept, and the estimation of the correct path is obtained by comparison and screening, Implement decoding. However, with the increase of the overlap multiplicity K, the number of states M=2^K in Viterbi decoding increases exponentially, resulting in a sharp increase in the computational complexity of the algorithm, making it difficult to meet the needs of real-time decoding.

[0081] However, this embodiment provides a decoding method based on overlapping multiplexing, which uses a sliding block decoding method to solve the problem of low decoding efficiency and high complexity in the OvXDM system...

Embodiment 2

[0124] Corresponding to the first embodiment above, this embodiment provides a decoding device based on overlapping multiplexing. Likewise, in this embodiment, the least squares method is taken as an example to describe the decoding device based on overlapping multiplexing provided in this embodiment. In other embodiments, the block decoding method may also use other algorithms, and its principle is similar to using the least square method.

[0125] Please refer to Figure 11 , the decoding device based on overlapping multiplexing includes a grouping module 701 , a conversion module 702 , a decoding module 703 , a known information removal module 704 , a sliding module 705 and an output module 706 .

[0126] The grouping module 701 is used for setting the length M of the grouping sequence according to the length of the multiplexed waveform in the received signal, and grouping the received sequence in the received signal. Wherein, the received signal is the complex modulation...

Embodiment 3

[0164] This embodiment provides a modulation and demodulation method based on overlapping multiplexing, including a modulation step and a demodulation step. In this embodiment, the modulation and demodulation based on overlapping time division multiplexing is mainly used for illustration.

[0165] like Figure 12 As shown, the modulation step includes the following sub-steps:

[0166] Step 2.1: Generate an initial envelope waveform h(t) in the time domain according to the design parameters.

[0167] When generating the initial envelope waveform, the design parameters can be input by the user to realize flexible configuration according to the system performance index in the actual system.

[0168] In some embodiments, the design parameters include the window length L of the initial envelope waveform when the sidelobe attenuation of the initial envelope waveform has been determined, eg, when the initial envelope waveform is a Bartlett envelope waveform.

[0169] In some embod...

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 overlapping and multiplexing-based decoding method, device, modulation and demodulation method and system provided by this application use the correlation between the front and back symbols of the OvXDM system by using the sliding group decoding method to split the convolution operation with the head and the tail After grouping operations with a head and a tail, the corresponding decoding algorithm is used to decode each group of sequences, which improves the decoding efficiency and ensures that the system has better performance while reducing the decoding complexity. It solves the problem that when the traditional communication system adopts the Viterbi decoding method, the received sequence is decoded symbol by symbol, the decoding efficiency is low, and the decoding complexity is high with the increase of the number of overlaps.

Description

technical field [0001] The present application relates to the communication field, in particular to a decoding method and device based on overlapping multiplexing, and a modulation and demodulation method and system. Background technique [0002] The modulation and demodulation technology based on overlapping multiplexing (OvXDM: Overlapped X Division Multiplexing) includes a variety of specific implementation schemes, such as the modulation and demodulation technology based on overlapping time division multiplexing (OvTDM: Overlapped Time Division Multiplexing), and the modulation and demodulation technology based on overlapping frequency division multiplexing ( OvFDM: Overlapped Frequency Division Multiplexing) modulation and demodulation technology, Overlapped Code Division Multiplexing (OvCDM: Overlapped Code Division Multiplexing) modulation and demodulation technology, Overlapped Space Division Multiplexing (OvSDM: Overlapped Space Division Multiplexing) modulation and ...

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 Patents(China)
IPC IPC(8): H04L1/00H04L27/04
CPCH04L1/0047H04L1/0052H04L27/04H04L27/2649H04L1/00H04L1/0045H04L1/005H04L27/2627H04J4/00
Inventor 不公告发明人
Owner SHEN ZHEN KUANG CHI HEZHONG TECH LTD