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CLC number: TN914.3
On-line Access: 2024-08-27
Received: 2023-10-17
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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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%T A novel OFDM transmission scheme with length-adaptive Cyclic Prefix
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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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T1 - A novel OFDM transmission scheme with length-adaptive Cyclic Prefix
A1 - ZHANG Zhao-yang
A1 - LAI Li-feng
J0 - Journal of Zhejiang University Science A
VL - 5
IS - 11
SP - 1336
EP - 1342
%@ 1869-1951
Y1 - 2004
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.
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2014-11-19 01:27:04
iwant a full text please