| Citation: | YAN Hou-xuan, ZHANG Tian-hong, SUN Jian-guo. Design of codec for FIR used in the telemetry of aeroengine rotor[J]. Journal of Aerospace Power, 2007, 22(3): 495-499.
|
In the telemetry system of aeroengine rotor,the multi-channel parallel FIR(fast infrared) data communication needs several codecs.With the CPLD(complicated programmable logic device) they can be realized on only one chip.It avails to reduce devices of the telemetry system and simplify setting on the rotor.In this paper,a Codec for FIR data communication was designed with one CPLD chip.The data communication with 4PPM(four pulse position modulation) was tested at 4 Mbps.The reason of mistakes in the communication with 4PPM was found after analyzing the response time of the infrared transceiver and the precision of the oscillation.Then two more efficient codes,2/3PPM and 4/5PPM,were proposed,which enhanced the speed of the data communication.
| [1] |
严后选,张天宏,孙健国.近距离红外无线数据通信技术研究[J].应用基础与工程科学学报,2004,12(4):404-415.YAN Houxuan,ZHANG Tianhong,SUN Jianguo.A survey of wireless infrared data communication[J].Journal of Basic Science and Engineering,2004,12(4):407-416.
|
| [2] |
卞春江,张天宏,邓志伟,等.面向旋转构件的高速无线数据采集系统[J].传感器技术,2004,23(11):53-55.BIAN Chunjiang,ZHANG Tianhong,DENG Zhiwei,et al.High-speed wireless data acquisition system for revolving component[J].Journal of Transducer Technology,2004,23(11):53-55.
|
| [3] |
Tan W S.IrDA serial infrared physical layer specification[R].California,IrDA Publications,2001.
|
| [4] |
Robertson S M G,Hansen S V,Sorenson F E,et al.Modeling IrDA performance:the effect of IrLAP negotiation parameters on throughput[A].IEEE International Conference on Computer Communications and Networks[C].Arizona:IEEE,2001.
|
| [5] |
Antonio G Z,Antonio P N.Improving PPM schemes in wireless infrared links at high bit rates[J].IEEE Communications Letters Los Vaqueros,2001,5(3):95-97.
|
| [6] |
Varker P,Boucouvalas A C.Interference induced asymmetry in IrDA 4PPM infrared wireless links[A].International Sysmposium on CSNDSP 2002[C].Stafford,England:Staffordshire University,2002:479-482.
|
| [7] |
Kahn J M,Barry J R.Wireless infrared communications[J].Proceedings of the IEEE Los Vaqueros,1997,85(2):265-298.
|
| [8] |
Funk J C,Knutson C D.Evaluating the capacity of RLL encoding for high bandwidth infrared channels[A].Proceeding of the 3rd Internation Symposium on Communication Systems[C].Networks and Digital Signal Processing (CSNDSP),Stafford,England:Staffordshire University,2002.
|
DownLoad: