| The Research of ST-OFDM in Physical Layer of IEEE 802.16a |
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| 引用本文： | JU Mei-yan ZHU Qi FENG Guang-zeng Department of Communication Engineering,Nanjing University of Posts and Telecommunications,Nanjing 210003,P.R.China. The Research of ST-OFDM in Physical Layer of IEEE 802.16a[J]. 中国邮电高校学报(英文版), 2004, 11(4) |
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| 作者姓名： | JU Mei-yan ZHU Qi FENG Guang-zeng Department of Communication Engineering Nanjing University of Posts and Telecommunications Nanjing 210003 P.R.China |
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| 作者单位： | JU Mei-yan ZHU Qi FENG Guang-zeng Department of Communication Engineering，Nanjing University of Posts and Telecommunications，Nanjing 210003，P.R.China |
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| 基金项目： | the Project of Science Committee，Jiangsu Provinee，国家高技术研究发展计划(863计划) |
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| 摘 要： | This paper briefly introduces one of the three physical layer implementations of IEEE 802.16a~[1],WirelessMAN-OFDM PHY.Based on the implementation,the combination of Orthogonal Frequency Division Multiplexing(OFDM)and Space-Time Coding(STC)which is briefly called ST-OFDM in IEEE 802.16a,is investigated under thechannel provided in Ref.[2].Especially,this paper is focused on the influence of the optimal decision threshold on the sys-tern Bit-Error-Rate(BER)performance based on unequal probabilities of sources.The simulations show that when Signal-Noise-Ratio(SNR)is low the optimal decision threshold is obviously superior to the usual one;when SNR is high to someextent,such as 10 dB for 4QAM and 16 dB for 16QAM,we can use the usual decision threshold instead of the optimal
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The Research of ST-OFDM in Physical Layer of IEEE 802.16a |
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| JU Mei-yan,ZHU Qi,FENG Guang-zeng. The Research of ST-OFDM in Physical Layer of IEEE 802.16a[J]. The Journal of China Universities of Posts and Telecommunications, 2004, 11(4) |
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| Authors: | JU Mei-yan ZHU Qi FENG Guang-zeng |
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| Abstract: | This paper briefly introduces one of the three physical layer implementations of IEEE 802.16a[1], Wireless MAN-OFDM PHY. Based on the implementation, the combination of Orthogonal Frequency Division Multiplexing (OFDM) and Space-Time Coding ( STC ) which is briefly called ST-OFDM in IEEE 802.16a, is investigated under the channel provided in Ref . [ 2 ]. Especially, this paper is focused on the influence of the optimal decision threshold on the system Bit-Error-Rate ( BER ) performance based on unequal probabilities of sources. The simulations show that when SignalNoise-Ratio ( SNR ) is low the optimal decision threshold is obviously superior to the usual one; when SNR is high to some extent, such as 10 dB for 4QAM and 16 dB for 16QAM, we can use the usual decision threshold instead of the optimal one . |
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| Keywords: | STC OFDM IEEE 802.16a STBC decision threshold |
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