Title :
Transmission of high rate ATM packets over indoor radio channels
Author :
Chini, Ahmad ; El-Tanany, Mohammed S. ; Mahmoud, Samy A.
Author_Institution :
Dept. of Syst. & Comput. Eng., Carleton Univ., Ottawa, Ont., Canada
fDate :
4/1/1996 12:00:00 AM
Abstract :
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
Keywords :
asynchronous transfer mode; channel coding; data communication; discrete Fourier transforms; estimation theory; fading; indoor radio; interference suppression; intersymbol interference; modems; modulation; multipath channels; ISI; average bit error rate; carrier frequency offset; channel estimation; computer simulation; design; differentially coherent scheme; discrete Fourier transform; fading; hardware nonlinearities; high data rate modem; high rate ATM packet transmission; indoor radio channels; intersymbol interface; multicarrier modulation technique; multipath spread; performance; rate one-half channel code; signal-to-noise ratio; Asynchronous transfer mode; Bit error rate; Channel estimation; Computer simulation; Discrete Fourier transforms; Fading; Indoor radio communication; Intersymbol interference; Modems; System performance;
Journal_Title :
Selected Areas in Communications, IEEE Journal on
