| Presentation | 2004/3/9 Comparative study of the Convolutional Spreading CDMA System with Equalization and the DS-CDMA System with Rake Reception Nalin S. WEERASINGHE, Takeshi HASIMOTO, |
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| PDF Download Page | PDF download Page Link |
| Abstract(in Japanese) | (See Japanese page) |
| Abstract(in English) | In synchronous DS-CDMA systems the co-channel interference (CCI) caused by multipath propagation degrades the system performance. To overcome this, ZCZ (Zero Correlation Zone) sequences with good correlation property are proposed [1], [3]. We propose convolutional spreading CDMA based on the ZCZ sequences and discuss its performance via simulation. Although the use of ZCZ sequences completely eliminates the multipath induced CCI, inter-symbol interference (ISI) occurs instead and we need a good equalizer. In this paper we discuss the problem of equalization for a pilot aided downlink CS-CDMA with ZCZ sequences, and compared it with the conventional DS-CDMA system with the M-sequences. We consider ZF-DF (zero forcing-decision feedback), linear MMSE (minimum mean square error) equalizer and MMSE(minimum mean square error)-DFE. |
| Keyword(in Japanese) | (See Japanese page) |
| Keyword(in English) | CDMA / Zero Correlation Zone spreading sequences / Convolutional Spreading / Co-Channel Interference / Equalization |
| Paper # | IT2003-88,ISEC2003-128,WBS2003-206 |
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| Conference Information | |
| Committee | ISEC |
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| Conference Date | 2004/3/9(1days) |
| Place (in Japanese) | (See Japanese page) |
| Place (in English) | |
| Topics (in Japanese) | (See Japanese page) |
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| Paper Information | |
| Registration To | Information Security (ISEC) |
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| Language | ENG |
| Title (in Japanese) | (See Japanese page) |
| Sub Title (in Japanese) | (See Japanese page) |
| Title (in English) | Comparative study of the Convolutional Spreading CDMA System with Equalization and the DS-CDMA System with Rake Reception |
| Sub Title (in English) | |
| Keyword(1) | CDMA |
| Keyword(2) | Zero Correlation Zone spreading sequences |
| Keyword(3) | Convolutional Spreading |
| Keyword(4) | Co-Channel Interference |
| Keyword(5) | Equalization |
| 1st Author's Name | Nalin S. WEERASINGHE |
| 1st Author's Affiliation | Department of Electronics Engineering The Univ. of Elelctro-Communications() |
| 2nd Author's Name | Takeshi HASIMOTO |
| 2nd Author's Affiliation | Department of Electronics Engineering The Univ. of Elelctro-Communications |
| Date | 2004/3/9 |
| Paper # | IT2003-88,ISEC2003-128,WBS2003-206 |
| Volume (vol) | vol.103 |
| Number (no) | 713 |
| Page | pp.pp.- |
| #Pages | 5 |
| Date of Issue | |