Dual-path static baseband channel simulating device and method

A baseband channel, analog device technology, applied in transmission monitoring, electrical components, transmission systems, etc., to solve problems such as signal distortion

Inactive Publication Date: 2015-11-11
THE 41ST INST OF CHINA ELECTRONICS TECH GRP
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0012] However, most devices down-convert the RF or IF signal to the baseband, and then simulate channel fading on the baseband signal. This method is prone to signal distortion during the down-conversion process.

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  • Dual-path static baseband channel simulating device and method
  • Dual-path static baseband channel simulating device and method
  • Dual-path static baseband channel simulating device and method

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Embodiment Construction

[0094] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0095] Existing channel simulation devices are mostly performed on intermediate frequency and radio frequency, which easily causes signal distortion during the spectrum shifting process. In addition, most of the existing devices are complicated to operate and costly.

[0096] The invention directly processes the baseband signal, and can support multiple predefined channel models and user-defined models. The channel fading can support constant, pure Doppler, Ray...

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Abstract

This invention provides a dual-path static baseband channel simulating device and method, which are applicable to a variety of communication scenarios. A channel model of each channel is selected by a user, and channel parameters are set and calculated; the channel parameters are subjected to fixed-point processing by a DSP (Digital Signal Processor), and the fixed-point parameters are transmitted into an FPGA (Field Programmable Gate Array) through an EMIF; multipath fading, shadow fading and Gaussian noise are superposed on the dual-path digital baseband signals collected by an AD in the FPGA, wherein the type of the multipath fading includes constant fading, pure Doppler fading, Rayleigh fading, Rician fading and the like; the shadow fading follows lognormal distribution; at last, an analog signal is output by a DA, and signal conditioning is performed on the analog signal, wherein the signal conditioning mainly comprises eliminating mirror components of the signal and controlling signal attenuation. The channel simulating device and method provided by the invention have the advantages of being various in fading types, simple in operation and the like.

Description

technical field [0001] The present invention relates to the technical field of wireless information transmission, in particular to a dual-channel static baseband channel simulation device, and also to a dual-channel static baseband channel simulation method for baseband channel simulation in various communication scenarios. Background technique [0002] The channel simulator can simulate the influence of actual communication scenarios on wireless signal propagation in the laboratory, and is widely used in the research and development and testing of communication equipment. [0003] With the rapid development of science and technology, people have higher and higher requirements for the reliability and real-time performance of wireless communication. Due to the Doppler frequency shift due to the relative motion between wireless communication devices, and the multipath effect caused by the reflection and scattering of the surrounding propagation environment during wireless sign...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B17/391H04B17/373
Inventor 周生奎陈应兵
Owner THE 41ST INST OF CHINA ELECTRONICS TECH GRP
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