| Presentation | 2007-06-29 2-Step Maximum Likelihood Channel Estimation for DS-CDMA Frequency-domain Equalization Yohei KOJIMA, Kazuaki TAKEDA, Fumiyuki ADACHI, |
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| Abstract(in Japanese) | (See Japanese page) |
| Abstract(in English) | In this paper, we propose a new channel estimation scheme for direct sequence code division multiple access (DS-CDMA) with frequency-domain equalization (FDE). Since the frequency spectrum of the pilot chip sequence is not constant, the channel estimation accuracy is degraded. Recently, we proposed a pilot-assisted channel estimation based on the minimum mean square error (MMSE) criterion. Using MMSE-CE, the channel estimation accuracy is almost insensitive to the pilot chip sequence, and a good BER performance is achieved. In this paper, to further improve the estimation accuracy, we propose a 2-step maximum likelihood channel estimation (MLCE) and evaluate the BER performance of DS-CDMA using 2-step MLCE in a frequency selective Rayleigh fading channel by computer simulation. |
| Keyword(in Japanese) | (See Japanese page) |
| Keyword(in English) | DS-CDMA / frequency-domain equalization / MMSE / channel estimation |
| Paper # | RCS2007-19 |
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| Conference Information | |
| Committee | RCS |
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| Conference Date | 2007/6/21(1days) |
| Place (in Japanese) | (See Japanese page) |
| Place (in English) | |
| Topics (in Japanese) | (See Japanese page) |
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| 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) | 2-Step Maximum Likelihood Channel Estimation for DS-CDMA Frequency-domain Equalization |
| Sub Title (in English) | |
| Keyword(1) | DS-CDMA |
| Keyword(2) | frequency-domain equalization |
| Keyword(3) | MMSE |
| Keyword(4) | channel estimation |
| 1st Author's Name | Yohei KOJIMA |
| 1st Author's Affiliation | Dept. of Electrical and Communication Engineering, Graduate School of Engineering, Tohoku University() |
| 2nd Author's Name | Kazuaki TAKEDA |
| 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 | 2007-06-29 |
| Paper # | RCS2007-19 |
| Volume (vol) | vol.107 |
| Number (no) | 113 |
| Page | pp.pp.- |
| #Pages | 6 |
| Date of Issue | |