Broadband channel simulation device and method

Abstract

The invention discloses a broadband channel simulation device and method. The device comprises a signal conditioning module, a low-pass filter, a data acquisition card and an impedance distributor, wherein the data acquisition card comprises a data acquisition module and a channel operation module; the data acquisition module is used for acquiring waveform data of at least two periods and sending the waveform data to the channel operation module; and the channel operation module is used for realizing Doppler frequency shift simulation operation and multipath effect simulation operation. According to the invention, Doppler frequency shift and multipath effect simulation of baseband signals in a wireless communication process are realized.

Description

technical field [0001] The invention belongs to the technical field of wireless communication signal processing, and more specifically relates to a broadband channel simulation device and method. Background technique [0002] As we all know, wireless communication has been widely used in military and civilian fields. Due to the complexity of wireless communication channels, terrain, temperature, altitude and other factors will have a greater impact on the quality of wireless communication. When wireless signals propagate in mountains and forests, due to the influence of obstacle groups, the multipath effect will be particularly obvious ; and when the two objects of wireless communication are moving at high speed with each other, the Doppler frequency shift effect is particularly prominent. With the emergence of software radio technology, the modulation method of naval wireless communication equipment is evolving from analog to digital, making the frequency band and bandwidt...

AI Technical Summary

Problems solved by technology

[0004] 1) Inefficiency

Research on wireless communication technology is a long-term and complicated process. Researchers need to repeatedly debug wireless communication equipment according to the actual application environment. Frequent travel between scientific research sites and application sites will undoubtedly greatly reduce scientific research efficiency and prolong the development cycle;

[0005] 2) Single data

For very low frequency communication, its coverage is extremely wide, and it is difficult to cover all application environments on the wireless communication link through single-point environmental data collection, resulting in the singularity and limitations of the collected data;

[0006] 3) Higher cost

The traditional channel simulator mainly implements channel simulation through hardware. Due to the limitation of physical conditions, when considering the communication between relative moving objects, it can only simulate in the same direction and reverse direction.

However, in the actual wireless communication process, the relative motion between objects often presents an asymmetric and irregular form, resulting in the forward and reverse Doppler frequency shift of the baseband signal, unequal sweep rate, and segmental sweep frequency phenomenon, it is impossible to truly and effectively simulate the Doppler frequency shift effect

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