| Presentation | 2004/1/7 Chip-level Maximum Likelihood Detection for DS-CDMA in a Frequency-Selective Fading Channel Akihiro Saito, Shinsuke Takaoka, Fumiyuki Adachi, |
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| PDF Download Page | PDF download Page Link |
| Abstract(in Japanese) | (See Japanese page) |
| Abstract(in English) | In the direct sequence code division multiple access (DS-CDMA), variable transmission rate can be realized by changing the spreading factor (SF) for the given chip rate. In a frequency-selective fading channel, the transmission performance can be improved by using rake combining. However, if too small SF is used for achieving a high transmission rate, an error floor occurs due to inter-path interference (IPI). In this paper, a chip-level maximum likelihood detection (chip-level MLD) is proposed that can suppress the IPI. The conditional theoretical upper-bound of bit error rate (BER) of the chip-level MLD is derived. The upper-bound average BER in a frequency-selective Rayleigh fading channel is numerically obtained using the derived conditional upper-bound BER by Monte Carlo simulation method and compared with theoretical average BER performance of Rake combining. Also, the average BER performance of chip-level MLD is obtained by computer simulation of DS-CDMA signal transmission and compared with the theoretically obtained upper-bound BER. |
| Keyword(in Japanese) | (See Japanese page) |
| Keyword(in English) | DS-CDMA / maximum likelihood detection / rake combining |
| Paper # | DSP2003-142,SAT2003-139,RCS2003-237 |
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| Conference Information | |
| Committee | RCS |
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| Conference Date | 2004/1/7(1days) |
| Place (in Japanese) | (See Japanese page) |
| Place (in English) | |
| Topics (in Japanese) | (See Japanese page) |
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| Paper Information | |
| Registration To | Radio Communication Systems (RCS) |
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| Language | JPN |
| Title (in Japanese) | (See Japanese page) |
| Sub Title (in Japanese) | (See Japanese page) |
| Title (in English) | Chip-level Maximum Likelihood Detection for DS-CDMA in a Frequency-Selective Fading Channel |
| Sub Title (in English) | |
| Keyword(1) | DS-CDMA |
| Keyword(2) | maximum likelihood detection |
| Keyword(3) | rake combining |
| 1st Author's Name | Akihiro Saito |
| 1st Author's Affiliation | Dept. of Electrical and Communication Engineering, Graduate School of Engineering, Tohoku University() |
| 2nd Author's Name | Shinsuke Takaoka |
| 2nd Author's Affiliation | Dept. of Electrical and Communication Engineering, Graduate School of Engineering, Tohoku University |
| 3rd Author's Name | Fumiyuki Adachi |
| 3rd Author's Affiliation | Dept. of Electrical and Communication Engineering, Graduate School of Engineering, Tohoku University |
| Date | 2004/1/7 |
| Paper # | DSP2003-142,SAT2003-139,RCS2003-237 |
| Volume (vol) | vol.103 |
| Number (no) | 551 |
| Page | pp.pp.- |
| #Pages | 5 |
| Date of Issue | |