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Short-wave multi-channel multi-bandwidth channel simulation method

An analog method and short-wave communication technology, applied in the field of communication, can solve the problem of adding different frequency bands, and achieve the effect of reducing overhead

Active Publication Date: 2018-09-07
XIDIAN UNIV
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Problems solved by technology

[0005] The purpose of the present invention is to provide a more universal short-wave multi-channel multi-bandwidth channel simulation method for the above-mentioned prior art that cannot add noise with different signal-to-noise ratios in different frequency bands. Move and generate multi-channel noise to meet the different requirements for different frequency band noise signal-to-noise ratios, and it is better suitable for various short-wave communication system experiments

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Embodiment Construction

[0060] The present invention will be further described below in conjunction with the accompanying drawings.

[0061] Refer to attached figure 1 , to further describe the specific steps of the present invention.

[0062] The present invention realizes by serial port data input module ST16C554 chip, analog-to-digital / digital-to-analog conversion module TLV320AIC3106 chip, signal processing module TMS320C6455 chip in the simulation device of short-wave communication channel, and concrete steps comprise as follows:

[0063] Step 1, input feature data.

[0064] The serial port data input module receives the channel control signal composed of 27 characteristic values ​​input by the serial port debugging assistant to the user.

[0065] The 27 characteristic values ​​are 27 hexadecimal numbers, and the length of each hexadecimal number is one byte; the first characteristic value in the 27 characteristic values ​​represents the length of the channel control signal; the second The ei...

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Abstract

The invention discloses a short-wave multi-channel multi-bandwidth channel simulation method, including the following steps: (1) inputting characteristic data; (2) inputting an analog signal; (3) sampling the analog signal; (4) obtaining an analytic signal; (5) obtaining mean power; (6) determining whether the mean power is greater than a noise threshold; (7) obtaining a frequency offset-added signal; (8) setting the number of paths; (9) obtaining a multi-path delay signal; (10) obtaining a total fading signal; (11) obtaining a signal-to-noise ratio of each channel; (12) obtaining a noise-added signal; and (13) obtaining an output signal. According to the scheme of the invention, various channel characteristics can be simulated, whether an effective signal input exists can be independentlydetermined, the advantage of simulating different signal-to-noise ratios in different frequency bands can also be realized, and the method disclosed by the invention is suitable for various short-wave communication experiments.

Description

technical field [0001] The invention belongs to the technical field of communication, and further relates to a method for simulating a short-wave multi-channel multi-bandwidth channel in the wireless communication technology. The present invention can be used in various short-wave wireless communication experiments to realize the simulation of short-wave wireless communication channel characteristics, so that developers can conveniently test the performance of short-wave wireless communication systems in a laboratory environment, reducing the development of short-wave wireless communication systems cost and shorten the development cycle. Background technique [0002] Analog wireless communication channel technology mainly refers to the technology of modeling wireless channels and adding multipath delay, multipath fading, Doppler frequency shift and Gaussian white noise to wireless signals. The study of wireless channels is an important part of wireless communication researc...

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Application Information

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IPC IPC(8): H04B17/391
CPCH04B17/3911H04B17/3912
Inventor 马卓张益嘉杜栓义龚威昶旭阳张伟
Owner XIDIAN UNIV
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