Multi-path generating apparatus, a multi-path fading simulator, and a multi-path generating method

Abstract

A time-varying multi-path generating apparatus, a multi-path fading simulator, and a multi-path generating method are disclosed. The generating apparatus consists of a parameter controller, a data storage unit, and a random number generator. The apparatus for generating the time-variant multipath further includes a path generator for calculating and generating a time-variant propagation path by generating a plurality of time-variant amplitude functions and time-variant phase functions of a plurality of propagation path parts, generating the time-variant shielding amplitude functions and the time-variant shielding phase functions by aligning the time-variant amplitude functions and the time-variant phase functions in a time series manner by the number of the propagation paths, generating an initial amplitude, an initial phase, an initial time delay and an initial incoming direction as path parameters by using the random number output from the random number generator and individually superposing the time-variant shielding amplitudes and the time-variant shielding phase functions on the initial amplitudes and the initial phases of the plurality of the propagation paths.

Description

technical field [0001] The present invention generally relates to a time-varying multipath generation device for simulating multipath variation in a wireless communication system such as a mobile communication system, a multipath fading simulator using the device, and a multipath generation method, and specifically relates to a time-varying multipath generation device using the device A time-varying multi-path generating device that generates time-varying multi-path by adding parameters (arrival direction characteristics, phase characteristics, delay characteristics, power level characteristics) of each propagation path corresponding to the input parameters, and a device using the same Multipath fading simulator and multipath generation method. Background technique [0002] figure 1 A conceptual diagram showing a case where radio waves are transmitted from a base station antenna and a mobile station receives radio waves arriving via multiple propagation paths formed by refl...

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Problems solved by technology

Power level variations caused by these shadowings should be considered as individual path variations, however conventional fading simulators do not have such evaluation means

[0023] Also, for propagating waves with roughly the same direction of arrival to the receiving station, there is a high possibility of accepting path shadowing changes caused by the same shadowing object, so the changing characteristics should have a strong correlation, but no such spatial analysis has yet been provided. fading simulator taking path-dependent properties into account

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