Design method for 2-D signals with low/zero correlation region

A technology of two-dimensional signal and design method, applied in the direction of electrical components, transmission system, etc., can solve the problem of non-existence of signal

Inactive Publication Date: 2004-02-04
INST OF TELECOMM TRANSMISSION MINIST OF INFORMATION IND +1
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  • Abstract
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  • Application Information

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Problems solved by technology

[0012] Unfortunately, in one dimension, be it binary, multivariate or complex signa

Method used

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  • Design method for 2-D signals with low/zero correlation region
  • Design method for 2-D signals with low/zero correlation region
  • Design method for 2-D signals with low/zero correlation region

Examples

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Embodiment Construction

[0053] Embodiment is illustrated below in conjunction with accompanying drawing:

[0054] see figure 1 , the arrangement of the apertures is based on the two-dimensional signal. When the image passes through the aperture, the coded image formed is essentially a convolution between the image and the two-dimensional signal. Multiple coded images are transmitted to the receiving end through channel multiplexing (addition operation), and then use each signal and the multiplexed signal for correlation operation to restore their original images. The whole process is very similar to the code division multiple access mobile communication system. As long as the two-dimensional signal that determines the aperture has good correlation characteristics, a better image can be recovered at the receiving end. When the approximately synchronous relationship is satisfied within a certain relative displacement range between each coded image, using the two-dimensional signal set with low / zero c...

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Abstract

A design method for 2D signals with low correlation region features the bit addition of optimal 2D signals with a group of 2D signals whose main peak of correlation function is +/-1. A signal design technique with zero correlation region features use of a group of non-periodical orthogonal complementing sequence sets. Its advantages are non-interferance transmission, real-time regulation and flexible-selection of parameters. It can be used for band-spread communication, aperture imaging, encryption, etc..

Description

Technical field: [0001] The invention relates to a two-dimensional signal design technology, in particular to a two-dimensional signal design with good correlation characteristics in low / zero correlation regions. Background technique: [0002] In many actual communication engineering system designs, it is required that the processed signal set has at least one of the following two conditions or both of them: [0003] 1. Each signal in the signal set is easily distinguished from its own time-delay signal, that is, its autocorrelation value is required to be as small as possible; [0004] 2. Each signal in the signal set is easily distinguished from other signals in the signal set and their time-delayed signals, that is, their cross-correlation values ​​are required to be as small as possible. [0005] The first property mentioned above is very important for systems such as spread spectrum communication systems, remote control telemetry systems and radar systems. For simulta...

Claims

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Application Information

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IPC IPC(8): H04B1/69
Inventor 唐小虎范平志
Owner INST OF TELECOMM TRANSMISSION MINIST OF INFORMATION IND
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