Transmission of High Rate ATM Packets over Indoor Radio Channels
Transmission of High Rate ATM Packets over Indoor Radio Channels
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通过室内无线电信道传输高速率 ATM 数据包
DOI：
10.1109/49.490232
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发表时间：
1996
期刊：
影响因子：
--
通讯作者：
S. Mahmoud
中科院分区：
文献类型：
--
作者：
A. Chini;M. El;S. Mahmoud
讨论了一种在室内无线信道上传输异步传输模式（ATM）分组的高数据速率调制解调器的设计和性能。一种基于离散傅立叶变换（DFT）的多载波调制技术被用于减轻由高达250 ns的多径扩展引起的符号间接口（ISI）。速率二分之一信道码用于对抗衰落。计算机仿真研究了五种不同多径强度分布下的系统性能。使用差分相干方案和基于信道估计的相干方案来比较系统性能。讨论了载波频率偏移和一些硬件非线性的影响。使用各种信道码，在平均误码率（BER）为10/sup-5/时，需要14-21 dB的信噪比（SNR），以便在280 MHz的带宽上传输总共155 Mb/s的数据。
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/sup -5/ to transmit a total of 155 Mb/s data over a bandwidth of 280 MHz.