TY - GEN
T1 - Downlink site diversity with frequency-domain equalization for a DS-CDMA cellular system
AU - Sato, Hirotaka
AU - Tomeba, Hiromichi
AU - Takeda, Kazuaki
AU - Adachi, Fumiyuki
N1 - Funding Information:
We thank G. Young, P. Millegan, and J. Hensel for many discussions on the processing of gravity gradiometer data. We would like to thank Desmond Rainsford for sharing with us his physical property information for the Ring of Fire area. We thank the Ontario Geological Survey and Natural Re-sources Canada for making the McFaulds’ Lake survey data available for download and open use. We thank associate editor V. Barbosa, re-viewers G. Barnes, F. Guspí, J. Lyrio, and an anonymous reviewer for their helpful comments. This research was funded in part by the industry consortium “Gravity & Magnetics Research Con-sortium” at the Colorado School of Mines. The sponsoring companies at the time of this research are Anadarko, Bell Geospace, BG-Group, BGP International, BP, CGG, ConocoPhillips, Exxon-Mobil, Gedex, Lockheed Martin, Marathon Oil, Micro-g LaCoste, Petrobras, Shell, and Vale.
PY - 2006
Y1 - 2006
N2 - In DS-CDMA high speed wireless signal transmissions, the bit error rate (BER) performance with coherent rake combining degrades due to inter-path interference (IPI) caused by a severe frequency-selective fading. The use of frequency-domain equalization (FDE) can significantly improve the BER performance. However, the local average received signal power slowly varies due to path loss and shadowing loss according to the movement of a mobile user. This variation degrades the link capacity particularly when the user is located close to the cell edge. To improve the link capacity, the well-known site diversity can be used in conjunction with FDE. In this paper, we present downlink site diversity with FDE for a DS-CDMA cellular system and derive the MMSE weight for site diversity combining. The downlink capacity is evaluated by computer simulation and compared to the case with coherent rake combining. Then it is shown that the link capacity with FDE is better than that with coherent rake combining.
AB - In DS-CDMA high speed wireless signal transmissions, the bit error rate (BER) performance with coherent rake combining degrades due to inter-path interference (IPI) caused by a severe frequency-selective fading. The use of frequency-domain equalization (FDE) can significantly improve the BER performance. However, the local average received signal power slowly varies due to path loss and shadowing loss according to the movement of a mobile user. This variation degrades the link capacity particularly when the user is located close to the cell edge. To improve the link capacity, the well-known site diversity can be used in conjunction with FDE. In this paper, we present downlink site diversity with FDE for a DS-CDMA cellular system and derive the MMSE weight for site diversity combining. The downlink capacity is evaluated by computer simulation and compared to the case with coherent rake combining. Then it is shown that the link capacity with FDE is better than that with coherent rake combining.
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U2 - 10.1109/ICCS.2006.301489
DO - 10.1109/ICCS.2006.301489
M3 - Conference contribution
AN - SCOPUS:46949101183
SN - 1424404118
SN - 9781424404117
T3 - 2006 IEEE Singapore International Conference on Communication Systems, ICCS 2006
BT - 2006 IEEE Singapore International Conference on Communication Systems, ICCS 2006
T2 - 10th IEEE Singapore International Conference on Communications Systems, ICCS 2006
Y2 - 30 October 2006 through 1 November 2006
ER -