TY - GEN
T1 - Gaussian chip waveform together with markovian spreading codes improve BER performance in chip-asynchronous CDMA systems
AU - Jitsumatsu, Yutaka
AU - Tahir Abbas Khan, M.
AU - Kohda, Tohru
PY - 2006
Y1 - 2006
N2 - Performance of chip-asynchronous DS/CDMA system depends on chip waveform as well as spread spectrum (SS) codes. In case of rectangular chip waveform, SS codes generated by a Markov chain were shown to improve bit error rate (BER) performance. However, in commercial CDMA systems, a band-limited root raised cosine (RRC) pulse is used, where the superiority of Markov codes is reduced. RRC pulse fulfills inter-chip interference (ICI)-free condition. In CDMA systems, multiple-access interference (MAI) is of crucial importance. Gaussian pulse used in conjunction with Markovian codes reduces MAI although it does not has the ICI-free property. Computer simulations show that Gaussian pulse with same excess bandwidth energy as the RRC pulse significantly reduces BER.
AB - Performance of chip-asynchronous DS/CDMA system depends on chip waveform as well as spread spectrum (SS) codes. In case of rectangular chip waveform, SS codes generated by a Markov chain were shown to improve bit error rate (BER) performance. However, in commercial CDMA systems, a band-limited root raised cosine (RRC) pulse is used, where the superiority of Markov codes is reduced. RRC pulse fulfills inter-chip interference (ICI)-free condition. In CDMA systems, multiple-access interference (MAI) is of crucial importance. Gaussian pulse used in conjunction with Markovian codes reduces MAI although it does not has the ICI-free property. Computer simulations show that Gaussian pulse with same excess bandwidth energy as the RRC pulse significantly reduces BER.
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U2 - 10.1109/GLOCOM.2006.101
DO - 10.1109/GLOCOM.2006.101
M3 - Conference contribution
AN - SCOPUS:50949118511
SN - 142440357X
SN - 9781424403578
T3 - GLOBECOM - IEEE Global Telecommunications Conference
BT - IEEE GLOBECOM 2006 - 2006 Global Telecommunications Conference
T2 - IEEE GLOBECOM 2006 - 2006 Global Telecommunications Conference
Y2 - 27 November 2006 through 1 December 2006
ER -