DocumentCode :
409694
Title :
Time and frequency equalization in 802.11a/g
Author :
Oteri, O. ; Wang, X. ; Mujtaba, S.A. ; Paulraj, A.
Author_Institution :
Dept. of Elect. Eng., Stanford Univ., CA, USA
Volume :
1
fYear :
2003
fDate :
9-12 Nov. 2003
Firstpage :
698
Abstract :
We study the BER performance of 802.11a/g in channels where the delay exceeds the cyclic prefix length. We find that a frequency equalizer (FEQ) designed from a time-domain estimate of the channel (TD-FEQ) out-performs the FEQ designed from a frequency domain estimate (FD-FEQ). Computer simulations show an 11 dB improvement. Secondly, the combination of a time equalizer (TEQ) and the TD-FEQ improves the BER compared with the TD-FEQ alone for higher transmission modes. For 64-QAM at Eb/No = 30 dB a 4.77 dB improvement is seen. The BER performance with different TEQ design criteria is examined.
Keywords :
channel estimation; equalisers; error statistics; wireless LAN; 64-QAM; 802.11; BER performance; frequency equalizer; time equalizer; time-domain estimate; Bit error rate; Computer simulation; Delay effects; Equalizers; Fast Fourier transforms; Frequency domain analysis; Frequency estimation; Information systems; OFDM; Wireless LAN;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Signals, Systems and Computers, 2004. Conference Record of the Thirty-Seventh Asilomar Conference on
Print_ISBN :
0-7803-8104-1
Type :
conf
DOI :
10.1109/ACSSC.2003.1292004
Filename :
1292004
Link To Document :
https://search.ricest.ac.ir/dl/search/defaultta.aspx?DTC=49&DC=409694
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