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

A Method for Generating Joint Orthogonal Subsets

A subset, orthogonal sequence technology, applied in the field of communication, can solve the problem of limited number of orthogonal sequences, and achieve the effect of excellent cross-correlation performance

Inactive Publication Date: 2020-07-10
ARMY ENG UNIV OF PLA
View PDF7 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Then, constrained by theoretical bounds, for a given sequence length, the number of orthogonal sequences is very limited

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
  • A Method for Generating Joint Orthogonal Subsets
  • A Method for Generating Joint Orthogonal Subsets
  • A Method for Generating Joint Orthogonal Subsets

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0050] Select an orthogonal sequence set whose sequence length and number of sequences are both equal to 16 as the initial orthogonal set, as shown in formula (1), expressed as Among them, the symbol "+" means "1", and the symbol "-" means "-1".

[0051]

[0052] the collection Three conditions in the generating method provided by the present invention are met. For the first condition, another set of orthogonal sequences can be found As shown in formula (2), the set can be orthogonal to the initial set Form a Gray Orthogonal Complementary Pair Set At this time, the corresponding orthogonal sequence C in the two sets i with S i They are Gray complementary pairings, that is, C i with S i Pairs have ideal aperiodic autocorrelation properties.

[0053]

[0054] image 3 gives the C 0 with S 0 The aperiodic autocorrelation distribution of , it can be seen from the figure that C 0 with S 0 Although the aperiodic autocorrelation fu...

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 relates to the field of communication, and discloses a method for generating a joint orthogonal subset. The method comprises the following steps: expanding an initial orthogonal set thatsatisfies a specific requirement by using a ''truncated interleaving method'' to obtain several new orthogonal subsets, merging the initial orthogonal set and the newly generated multiple orthogonalsubsets to form the ''joint orthogonal subset''. For the generated joint orthogonal subset, any two sequences inside the subset have orthogonal properties, and different orthogonal subsets satisfy that the normalized same-phase correlation is not greater than 0.5, and the peak-to-average power ratio of any sequence in the joint orthogonal subset can be suppressed within 3 dB.

Description

technical field [0001] The invention relates to the communication field, in particular to a method for generating joint orthogonal subsets. Background technique [0002] The number of users of spread spectrum communication mainly depends on the number of spread spectrum sequences. When using multi-ary system spread spectrum, the number of sequences will also affect the transmission rate of the system. In order to accommodate more users and obtain higher transmission rates, spread spectrum communication systems generally require a large-capacity sequence set. [0003] As we all know, for any set of sequences, if the orthogonal condition is met, that is, the same cross-correlation between any two sequences in the set is equal to zero, then the maximum number of sequences at this time is equal to the length of the sequence. Then, constrained by theoretical bounds, for a given sequence length, the number of orthogonal sequences is very limited. In order to obtain more orthogon...

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): H04B1/69H04L1/00H04B1/7097
CPCH04B1/69H04B1/7097H04L1/0071
Inventor 张振宇刘晨润彭天佐宣贵新曾凡鑫
Owner ARMY ENG UNIV OF PLA