Wireless channel scene identification method and system
A wireless channel and scene recognition technology, applied in wireless communication, transmission system, transmission monitoring, etc., can solve the problems of limited identification types, difficult direct access paths, and no special demonstration of outdoor wireless channel scene recognition methods
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Embodiment 1
[0058] Such as figure 1 Shown is a schematic flowchart of a wireless channel scene recognition method provided by an embodiment of the present invention, including the following steps:
[0059] S1: Establish a wireless channel scenario model: In wireless communication, the transmitted signal is s(t)=Acos(2πfct), where A is the signal amplitude, f c Is the carrier frequency, and t is the time. A plane wave arrives at an angle θ, and the velocity of the moving station is v. The wave arrives along the horizontal direction. Let x(t) be the baseband transmit signal, then the corresponding passband transmit signal is: Among them, Re[(t)] represents the real part of s(t). After passing through the scattering channel with I propagation paths, the passband received signal is: Among them, y(t) represents the baseband received signal, C i with τ i respectively represent the channel gain and delay of the i-th propagation path, f i Indicates the Doppler shift. The speed v and wav...
Embodiment 2
[0094] Such as Figure 8 Shown is a schematic structural diagram of a system provided by an embodiment of the present invention, including:
[0095] The modeling simulation and signal processing module 801 is used to establish a wireless channel scenario model, and simulate different wireless channel scenarios according to the wireless channel scenario model, and for each wireless channel scenario, collect passband signals and perform preprocessing to obtain channel scenario baseband signals ;
[0096] The autocorrelation obtaining module 802 is used to extract the characteristic parameters of the channel scene baseband signal by using the autocorrelation method, and extract the autocorrelation function of the channel scene baseband signal;
[0097] The normalized channel scene power spectral density calculation module 803 is used to perform Fourier transform on the autocorrelation function to obtain the power spectral density function, and normalize the power spectral densit...
Embodiment 3
[0102] The present application also provides a computer-readable storage medium, such as flash memory, hard disk, multimedia card, card-type memory (for example, SD or DX memory, etc.), random access memory (RAM), static random access memory (SRAM), read-only Memory (ROM), Electrically Erasable Programmable Read-Only Memory (EEPROM), Programmable Read-Only Memory (PROM), Magnetic Storage, Magnetic Disk, Optical Disk, Server, App Store, etc., on which computer programs, program When executed by the processor, the wireless channel scene recognition method in the method embodiment is implemented.
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