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CLC number: TN914.3
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Received: 2003-07-07
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A novel OFDM transmission scheme with length-adaptive Cyclic Prefix
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ZHANG Zhao-yang, LAI Li-feng. A novel OFDM transmission scheme with length-adaptive Cyclic Prefix[J]. Journal of Zhejiang University Science A, 2004, 5(11): 1336-1342.
@article{title="A novel OFDM transmission scheme with length-adaptive Cyclic Prefix",
author="ZHANG Zhao-yang, LAI Li-feng",
journal="Journal of Zhejiang University Science A",
volume="5",
number="11",
pages="1336-1342",
year="2004",
publisher="Zhejiang University Press & Springer",
doi="10.1631/jzus.2004.1336"
}
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%A LAI Li-feng
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%I Zhejiang University Press & Springer
%DOI 10.1631/jzus.2004.1336
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A1 - ZHANG Zhao-yang
A1 - LAI Li-feng
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SP - 1336
EP - 1342
%@ 1869-1951
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PB - Zhejiang University Press & Springer
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DOI - 10.1631/jzus.2004.1336
Abstract: Conventional OFDM transmission system uses a fixed-length cyclic Prefix to counteract Inter-Symbol Interferences (ISI) caused by channel delay spreading under wireless mobile environment. This may cause considerable performance deterioration when the CP length is less than the channel RMS delay spread, or may decrease the system power and spectrum efficiency when it is much larger. A novel OFDM transmission scheme is proposed in this paper to adapt the CP length to the variation of channel delay spread. AOFDM-VCPL utilizes the preamble or pilot sub-carriers of each OFDM packet to estimate the channel RMS delay spread; and then uses a criterion to calculate the CP length, which finally affects the OFDM transmitter. As illustrated in the simulation section, by deploying this scheme in a typical wireless environment, the system can transmit at data rate 11.5 Mb/s higher than conventional non-adaptive system while gaining a 0.65 dB power saving at the same BER performance.
[1] Keller, T., Hanzo, L., 2000. Adaptive modulation techniques for duplex OFDM transmission. IEEE Transactions on Vehicular Technology, 49(5):1893-1906.
[2] Moon, J., Park, S.Y., Hong, S.J., 2002. Adaptive OFDM system for multi-rate multi-user services in wireless communications. The 5th International Symposium on Wireless Personal Multimedia Communications, 3:1039-1043.
[3] Nobles, P., Halsall, F., 1997. Delay Spread and Received Power Measurements Within a Building at 2 GHz, 5 GHz, and 17 GHz. IEE Tenth International Conference on Antennas and Propagation, Edinburgh, UK.
[4] Rapport, T.S., McGillm, C.D., 1989. Characterization of UHF multipath radio channels in factory buildings. IEEE Transactions on Antennas and Propagation, 37(8):1058-1069.
[5] Souryal, M., Raymond, R., Pickholtz, L., 2002. Adaptive modulation with imperfect channel information in OFDM. ICC 2001. IEEE International Conference on Communications, 6:11-14.
[6] Steele, R., 1992. Mobile Radio Communication. IEEE Press, New York.
[7] Van de Beek, E.O., Sandell, M., Wilson, S.K., Borjesson, P.O., 1995. On channel estimation in OFDM systems. IEEE 45th VTC, 2:815-819.
[8] Van Nee, R., Prasad, R., 2000. OFDM for Wireless Multimedia Communications. Artech House, Boston, p.46.
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2014-11-19 01:27:04
iwant a full text please