Transmission of high rate ATM packets over indoor radio channels

被引:8
作者
Chini, A
ElTanany, MS
Mahmoud, SA
机构
[1] Dept. of Syst. and Comp. Engineering, Carleton University, Ottawa
[2] Carleton University, Ottawa, Ont.
[3] Department of Electrical Engineering, Isfahan Technical University
关键词
D O I
10.1109/49.490232
中图分类号
TM [电工技术]; TN [电子技术、通信技术];
学科分类号
0808 ; 0809 ;
摘要
The design and performance of a high data rate modem that transmits asynchronous transfer mode (ATM) packets over indoor radio channels is discussed. A discrete Fourier transform (DFT)-based multicarrier modulation technique is used to mitigate intersymbol interface (ISI) caused by a multipath spread of up to 250 ns. A rate one-half channel code is used to combat fading. Computer simulation is performed to investigate the system performance for five different multipath intensity profiles. The system performance is compared using a differentially coherent scheme and a coherent scheme based on channel estimation. The effects of carrier frequency offset and some of the hardware nonlinearities are discussed. Using various channel codes, an signal-to-noise ratio (SNR) of 14-21 dB is required at an average bit error rate (BER) of 10(-5) to transmit a total of 155 Mb/s data over a bandwidth of 280 MHz.
引用
收藏
页码:469 / 476
页数:8
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