基于IEEE 802.11p的车载无线通信原型系统的实现

doi:10.3969/j.issn.1000-0801.2014.03.014

摘要/Abstract

摘要：

首先根据IEEE 802.11p 协议建立了一个系统仿真模型，其次具体描述了系统设计中的关键技术，包括OFDM系统参数带宽速率选择、导频子载波设计、同步与估计算法设计等，通过系统仿真模型发现存在的问题，并调研和改进信道估计算法，以适应移动场景下的不利因素。在FPGA平台上进行了具体的实现，评估硬件平台下的处理速度、容量及处理性能。最后，在实际车路场景下演示移动车辆通过原型系统对路灯进行控制。

关键词: IEEE802.11p, DSRC/WAVE, 系统设计, 硬件实现

Abstract:

A simulation system and hardware platform based on IEEE 802.11p proposal was established. Then, key technologies of system design include OFDM parameter bandwidth and data rate choice, pilots' structure design, synchronization and channel estimation design, were presented. A novel channel estimation method to eliminate the disadvantage in vehicle environment was proposed. The vehicle communication system based on IEEE 802.11p was realized on FPGA hardware platform. The processing speed, storage and performance on the platform were appraised, and then a demo about the vehicle control traffic light in vehicle-to-roadside environment on the platform was realized.

Key words: IEEE 802.11p, DSRC/WAVE, system design, hardware realization

陈娟,蔡孙增,朱正航,蒋海平,康凯. 基于IEEE 802.11p的车载无线通信原型系统的实现[J]. 电信科学, 2014, 30(3): 72-79.

Juan Chen,Sunzeng Cai,Zhenghang Zhu,Haiping Jiang,Kai Kang. Realization of WAVE System Based on IEEE 802.11p[J]. Telecommunications Science, 2014, 30(3): 72-79.

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参考文献 5

1	Jiang D , Taliwal V , Meier A , et al. Design of 5.9 GHz DSRC-based vehicular safety communication. IEEE Wireless Communications, 2006,13(5): 36～43
2	Xiang W D , Gozalvez J , Niu Z S , et al. Wireless access in vehicular environments. EURASIP Journal Wireless Communication and Networking, 2009(1)
4	刘富强，项雪琴，邱冬，等. 车载通信DSRC技术和通信机制研究. 上海汽车， 2007(8)
	IEEE Std 802.11p. Part 11: Wireless LAN Medium Access Control （MAC）and Physical Layer （PHY）Specifications. Amendment 6: Wireless Access in Vehicle Environment, July 2010
5	IEEE Std 802.11-2012. Part 11: Wireless LAN Medium Access Control（MAC）and Physical Layer（PHY）Specifications. IEEE Standard for Information Technology Telecommunications and Information Exchange between Systems-Local and Metropolitan Area Networks Specific Requirements, Mar 2012
6	Zhang L , Gao D , Liang L , et al. Requirement, architecture, and performance for DSRC in vehicular sensor network. Proceedings of IEEE 7th International Conference on Wireless Communications, Networking and Mobile Computing （WiCOM）, Wuhan, China, 2011: 1～4
7	Hsu C W , Shih M H , Huang H Y , et al. Verification of smart guiding system to search for parking space via DSRC communication. Proceedings of 12th International Conference on ITS Telecommunications（ITST）, Taibei, China, 2012: 77～81
8	Dow C , Ho M , Lee Y , et al. Design and implementation of a DSRC based vehicular warning and notification system. Proceedings of IEEE 13th International Conference on High Performance Computing and Communications（HPCC）, Banff, 2011: 960～965
9	Tsuboi T , Yamada J , Yamauchi N , et al. WAVE design for next DSRC applications. Proceedings of Conference on Wireless Telecommunications Symposium（WTS）, Tampa, 2010: 1～6
10	Erceg V . TGn Channel Models. IEEE 802.11 Document 03/940r4, 2004
11	Tannious R M A , Arslan H . Doppler spread estimation for wireless OFDM system. Proceedings of IEEE/Sarnoff Symposium on Advances in Wired and Wireless Communication, Princeton, 2005: 233～236
12	Abdulhamid H , Abdel-Raheem E , Tepe K E . Channel estimation for 5.9 GHz dedicated short range communications receiver in wireless access vehicular environments. IEEE Communications, IET-2007,1(6) 1274～1279
13	Lin C S , Sun C K , Lin J C , et al. Performance evaluations of channel estimations in IEEE 802.11p environments. Proceedings of International Conference on ICUMT'09 St Petersburg, 2009: 1～5
14	Fernandez J A , Stancil D D , Bai F . Dynamic channel equalization for IEEE 802.11p waveforms in the vehicle-to-vehicle channel. Proceedings of Forty-Eighth Annual Allerton Conference Allerton, 2010: 542～551
[5]	Fernandez J A , Borries K , Cheng L , et al. Performance of the IEEE 802.11p Physical Layer in Vehicle-to-Vehicle Environments. IEEE Transactions on Vehicular Technology, 2012,61(1): 3～14

通信模式	覆盖范围	传输速率	移动能力	实时特性	安全需求	安装成本	运营成本
蜂窝系统	35～120 km	2.5G:114 kbit/s	高	中	高	低	中
		3G:384 kbit/s
		3.5G:7.2 Mbit/s
WiMAX	3～50 km	70 Mbit/s	高	低	高	中	高
卫星	20 000 km左右	9.6 kbit/s	高	中	低	高	高
有源RFID	10～50 m	数十至几百kbit/s	中	中	高	高	低
红外线	10～50 m	数十至几百kbit/s	中	中	高	高	低
Wi-Fi	10～100 m	1～54 Mbit/s	中	中	低	低	低
DSRC/WAVE	300～1 000 m	3～27 Mbit/s	高	高	中	低	低

系统仿真参数	数值
系统带宽	10 MHz
抽样速率	80 MHz
传输速率	3.0 Mbit/s
数据/导频子载波数/FFT点数	48/4/64
子载波间隔	156.25 kHz
OFDM符号长度	8.0 μs
数据长度	1 000 byte
调制方式	BIT/SK/QPSK
信道编码方式	卷积码（r=1/2）
天线结构	1×1

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