TY - GEN
T1 - Experiments on coherent adaptive antenna array diversity for wideband CDMA mobile radio
AU - Tanaka, S.
AU - Harada, A.
AU - Sawahashi, M.
AU - Adachi, F.
PY - 1999
Y1 - 1999
N2 - In wideband DS-CDMA (W-CDMA) in which mobile multimedia services up to 2 Mbps will be provided, adaptive antenna array diversity can be applied to reduce multiple access interference (MAI), especially in cases of severe interference from high rate users. A pilot symbol-assisted coherent adaptive antenna array diversity (PSA-CAAAD) receiver is implemented for W-CDMA mobile radio and its performance in a multi-path fading environment is evaluated both in laboratory and field experiments. The PSA-CAAAD receiver comprises an adaptive antenna array based on a minimum mean square error (MMSE) criterion and Rake combiner. It is demonstrated from the experimental results that the nulls could be precisely directed toward the interfering signals under a real multi-path propagation environment. Compared to antenna diversity with the same number of antennas, the PSA-CAAAD receiver can significantly reduce the interference from high bit-rate users. For a two-user case (one interfering-user with high transmit power), the required signal-to-interference plus background noise ratio (SIR) for obtaining the average BER of 10-3 is found to be reduced by about 4.5 dB with a 4-element PSA-CAAAD receiver compared to 4-branch antenna diversity in a real multi-path propagation environment.
AB - In wideband DS-CDMA (W-CDMA) in which mobile multimedia services up to 2 Mbps will be provided, adaptive antenna array diversity can be applied to reduce multiple access interference (MAI), especially in cases of severe interference from high rate users. A pilot symbol-assisted coherent adaptive antenna array diversity (PSA-CAAAD) receiver is implemented for W-CDMA mobile radio and its performance in a multi-path fading environment is evaluated both in laboratory and field experiments. The PSA-CAAAD receiver comprises an adaptive antenna array based on a minimum mean square error (MMSE) criterion and Rake combiner. It is demonstrated from the experimental results that the nulls could be precisely directed toward the interfering signals under a real multi-path propagation environment. Compared to antenna diversity with the same number of antennas, the PSA-CAAAD receiver can significantly reduce the interference from high bit-rate users. For a two-user case (one interfering-user with high transmit power), the required signal-to-interference plus background noise ratio (SIR) for obtaining the average BER of 10-3 is found to be reduced by about 4.5 dB with a 4-element PSA-CAAAD receiver compared to 4-branch antenna diversity in a real multi-path propagation environment.
UR - http://www.scopus.com/inward/record.url?scp=0032655451&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=0032655451&partnerID=8YFLogxK
M3 - Conference contribution
AN - SCOPUS:0032655451
SN - 0780354354
T3 - IEEE VTS 50th Vehicular Technology Conference, VTC 1999-Fall
SP - 243
EP - 248
BT - IEEE VTS 50th Vehicular Technology Conference, VTC 1999-Fall
T2 - IEEE VTS 50th Vehicular Technology Conference, VTC 1999-Fall
Y2 - 19 September 1999 through 22 September 1999
ER -