Evaluation of stationarity regions in measured non-WSSUS 60 GHz mmWave V2V channels Danilo Radovic

2025-04-27 0 0 924.21KB 5 页 10玖币

侵权投诉

Evaluation of stationarity regions in measured

non-WSSUS 60 GHz mmWave V2V channels

Danilo Radovic

Institute of Telecommunication

TU Wien

Vienna, Austria

danilo.radovic@tuwien.ac.at

Herbert Groll

Institute of Telecommunication

TU Wien

Vienna, Austria

herbert.groll@tuwien.ac.at

Christoph F. Mecklenbr¨

auker

Institute of Telecommunication

TU Wien

Vienna, Austria

Abstract—Due to high mobility in multipath propagation

environments, vehicle-to-vehicle (V2V) channels are generally

time and frequency variant. Therefore, the criteria for wide-

sense stationarity (WSS) and uncorrelated scattering (US) are

just satisﬁed over very limited intervals in the time and frequency

domains, respectively. We test the validity of these criteria in

measured vehicular 60 GHz millimeter wave (mmWave) channels,

by estimating the local scattering functions (LSFs) from the

measured data. Based on the variation of the LSFs, we deﬁne

time-frequency stationarity regions, over which the WSSUS

assumption is assumed to be fulﬁlled approximately. We analyze

and compare both line-of-sight (LOS) and non-LOS (NLOS) V2V

communication conditions.

We observe large stationarity regions for channels with a dom-

inant LOS connection, without relative movement between the

transmitting and receiving vehicle.

In the same measured urban driving scenario, modiﬁed by

eliminating the LOS component in the post-processing, the

channel is dominated by specular components reﬂected from an

overpassing vehicle with a relative velocity of 56 km/h. Here, we

observe a stationarity bandwidth of 270 MHz. Furthermore, the

NLOS channel, dominated by a single strong specular component,

shows a relatively large average stationarity time of 16 ms, while

the stationarity time for the channel with a rich multipath proﬁle

is much shorter, in the order of 5ms.

Index Terms—V2V communication, mmWave, WSSUS, B5G

I. INTRODUCTION

Beyond ﬁfth generation (B5G) wireless communication

technology is supposed to enhance the current systems by

offering new wide-bandwidth communication channels. Fur-

thermore, new technologies are developed to suit ever extend-

ing requirements of vehicular wireless communication. As a

suitable solution for this task, communication over millimeter

wave (mmWave) frequency band is proposed. However, the

vehicular channels show challenging characteristics due to

high mobility and rapidly changing scattering environment.

mission from IEEE must be obtained for all other uses, in any

current or future media, including reprinting/republishing

this material for advertising or promotional purposes, cre-

ating new collective works, for resale or redistribution to

servers or lists, or reuse of any copyrighted component of

this work in other works.

Moreover, the Doppler spectrum may vary over the time-

frequency domain, limiting the validity assumption of wide-

sense stationarity (WSS) [1]. Nevertheless, the changing chan-

nel environment causes variations in the delay spectrum, vio-

lating the uncorrelated scattering (US) criterion. Furthermore,

as the carrier frequency increases, the Doppler shift becomes

more severe. Hence, the before mentioned stationarity issues

are magniﬁed, and we conclude that mmWave vehicle-to-

vehicle (V2V) channels are in general non-WSSUS.

However, the validity of many channel models and design

of wireless transceivers is dependent on WSSUS assumption.

Therefore, it is important to analyze the size of stationarity

regions, as time-frequency area, in which WSSUS criteria are

approximately satisﬁed.

A theoretical approach to deﬁning stationarity regions is given

in [2]. Further, multiple papers investigate the non-WSSUS

behavior of the measured channels. The authors in [3] and

[4] show spatial variation phenomenon, observing the fading

process and deﬁning channel stationarity as a function of a

distance from the original position. [4] analyses the effect

of having a line-of-sight (LOS) as a contrast to a non-LOS

(NLOS) connection, showing that the spatial variation is not

as severe in LOS as in the NLOS conditions. Experimental

contributions for V2V communication, to the identiﬁcation

of stationarity regions in time and frequency, for 5GHz

band, are presented in [5]. The authors in [6] analyze the

stationarity in the time domain depending on different V2V

5GHz measurement scenarios. However, to the best of our

knowledge, the stationarity investigation for 60 GHz band has

not been shown yet for vehicular communication.

We analyze the behavior of a real measured V2V 60 GHz

channel for typical LOS urban scenarios. Furthermore, in order

to compare the results with a NLOS scenario, we modify the

measured channel, by eliminating the LOS component in the

post-processing. We deﬁne local scattering function (LSF), by

using the concepts described in [2], and follow its variation

over time and frequency. By calculating collinearity between

LSFs, and setting a threshold, we deﬁne time and frequency,

over which LSF is approximately constant. Hence, we quantify

the consecutive time-frequency regions with approximately

satisﬁed WSSUS condition, called stationarity regions.

In Section II we introduce a deﬁnition of LSF, and discuss

arXiv:2210.02923v1 [eess.SP] 6 Oct 2022

文档加载中……请稍候！
如果长时间未打开，您也可以点击刷新试试。

下载文档到电脑，查找使用更方便

10 玖币 0人已下载

立即下载

摘要：

Evaluationofstationarityregionsinmeasurednon-WSSUS60GHzmmWaveV2VchannelsDaniloRadovicInstituteofTelecommunicationTUWienVienna,Austriadanilo.radovic@tuwien.ac.atHerbertGrollInstituteofTelecommunicationTUWienVienna,Austriaherbert.groll@tuwien.ac.atChristophF.Mecklenbr¨aukerInstituteofTelecommunication...

展开>> 收起<<

Evaluation of stationarity regions in measured non-WSSUS 60 GHz mmWave V2V channels Danilo Radovic.pdf

共5页,预览1页

还剩页未读，继续阅读

声明：本站为文档C2C交易模式，即用户上传的文档直接被用户下载，本站只是中间服务平台，本站所有文档下载所得的收益归上传人(含作者)所有。玖贝云文库仅提供信息存储空间，仅对用户上传内容的表现方式做保护处理，对上载内容本身不做任何修改或编辑。若文档所含内容侵犯了您的版权或隐私，请立即通知玖贝云文库，我们立即给予删除！

Evaluation of stationarity regions in measured non-WSSUS 60 GHz mmWave V2V channels Danilo Radovic

相关推荐

开通VIP享超值会员特权

作者详情

相关内容

热门标签

举报选择: