Pulse wideband multipath signal modeling method and system under indoor view distance environment

Abstract

The invention relates to a method and a system for modeling I-UWB (Impulse-Ultra Wide Band) signal multipath transmission characteristics in an indoor visual range environment. The method comprises the following steps: dividing the I-UWB multipath signals into two confirmed clusters, each of which is provided with random arrival multipath rays; inputting the confirmed parameter which includes a multipath gain Alpha 0,0 of the initial ray of the first cluster, a multipath gain Alpha 0,1 of the initial ray of the second cluster, and the relative time delay Tm of the first and the second clusters; inputting the statistical parameters which includes the multipath arrival factor Lambada, the damped exponential Gamma of the multipath mean power and the logarithmic normal distribution standard deviation Sigma of the multipath gain of all the multipath rays which arrive subsequently in each cluster; initializing the functions of logarithmic normal distribution and exponential distribution; generating the first cluster and the second cluster; sorting the arrived multipath rays by the time sequence; and outputting the channel impulse response. The invention realizes the simplified I-UWB signal multipath transmission model, which has higher forecasting accuracy and is suitable for the indoor visual range environment without a plurality of environment topological data.

Description

technical field [0001] The invention belongs to the field of wireless communication, relates to modeling and simulating the multipath propagation characteristics of a wireless communication system, and more particularly relates to a pulsed ultra-wideband (I - A method and system for modeling the multipath propagation channel impulse response of a UWB) signal. Background technique [0002] Ultra-Wide Band (UWB) communication technology is a new type of wireless communication technology that has developed rapidly in the near future and is different from traditional wireless communication technology. According to the definition of the FCC (Federal Communications Commission of the United States), any signal with a relative bandwidth greater than 20% or a bandwidth greater than 500MHz, which meets the FCC power spectral density limit requirements, is called an ultra-wideband signal. The physical environment of the UWB wireless channel can generally be divided into two types: a l...

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Problems solved by technology

[0012] The purpose of the research of the present invention is to provide a statistical model and a definite model for the defects that the existing models cannot be effectively applied to the accurate prediction of the multipath propagation characteristics of the indoor line-of-sight environment of pulsed ultra-wideband signals, and the input parameters are relatively complicated. Combined with the method and system specially applied to modeling the multipath propagation characteristics of I-UWB signals in indoor line-of-sight environments, the model established by using the method and system can accurately predict and simulate the channel of I-UWB signals in indoor line-of-sight environments Impulse response and corresponding multipath propagation characteristics, the method and system itself are relatively simplified, and the input parameters are relatively easy to obtain and easy to apply

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