多普勒谱的一种模拟方法

1988 IEEE 5th International Symposium on Spread Spectrum Techniques and Applications - Proceedings. Spread Technology to Africa (Cat. No.98TH8333) Pub Date : 1998-09-02 DOI:10.1109/ISSSTA.1998.723838

G. Wetzker, U. Kaage, F. Jondral

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引用次数: 8

摘要

为了评估适合时变多径传播的现代调制技术的性能，有必要用计算机模型对这些信道进行模拟。时变多径信道通过频率和时间色散使传输链路失真。虽然时间色散的模拟可以通过有限抽头延迟线来完成，但频率色散的模拟取决于信道的时间变化，与模拟的采样间隔相比，信道的时间变化通常非常缓慢，因此难以模拟。在提出一种新的多普勒频谱模拟方法之前，回顾了信道建模和多普勒频谱的理论，讨论了目前已知的多普勒频谱模拟方法及其缺点。

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A simulation method for Doppler spectra

To evaluate the performance of modern modulation techniques suited for time-variant multipath propagation, it is necessary to simulate such channels by computer models. A time-variant multipath channel distorts a transmission link by frequency and time dispersion. While the simulation of time dispersion can be accomplished by a finite tapped delay line, the simulation of the frequency dispersion depends on the time variations of the channel, which are typically very slow compared to the sampling interval of the simulation and therefore, difficult to simulate. Before a new method for the simulation of Doppler spectra is presented, the theory of channel modelling and Doppler spectra is reviewed and known methods for the simulation of Doppler spectra and their disadvantages are discussed.

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来源期刊

1988 IEEE 5th International Symposium on Spread Spectrum Techniques and Applications - Proceedings. Spread Technology to Africa (Cat. No.98TH8333)

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