| Presentation | 2003/1/10 LDPC Coded Unitary Space-Time Modulated OFDM in Broadband Mobile Channel Naoki YOSHIMOCHI, Tomohiro HIRAMOTO, Atsushi MIZUKI, Chang-Jun AHNT, Iwao SASASE, |
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| Abstract(in Japanese) | (See Japanese page) |
| Abstract(in English) | In orthogonal frequency division multiplexing (OFDM), unitary space-time modulated OFDM system has been proposed for obtaining the space and time diversity gains. A unitary space-time signal is a matrix, whose rows are transmitted from multiple antenna elements and mutually orthogonal to each other. Such constellations have been shown to perform well, so USTM/OFDM can achieve high capacity and high data rate. From the information theoretical perspective, it is necessary to apply error correction coding to further approach the channel capacity limit. Recently, low density-parity check (LDPC) code has attracted considerable attention as an error correction code, since the LDPC code can achieve the BER performance that is close to the Shannon limit with large parity check matrix. However, the performance of USTM/OFDM with LDPC code has not been analyzed. In this paper, we evaluate the performance of the proposed LDPC coded USTM/OFDM in broadband mobile channel. Since the proposed system assigns the data in frequency domain, the performance of our proposed system obtainsfrequency diversity in LDPC decoding. By using the computer simulation, we clarify the performance of the LDPC coded LTSTM/OFDM. As a result, we show the BER performance of the proposed system can be improved due to the space-time diversity and coding gain. |
| Keyword(in Japanese) | (See Japanese page) |
| Keyword(in English) | OFDM / LDPC / USTM |
| Paper # | DSP2002-199,SAT2002-149,RCS2002-268 |
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| Conference Information | |
| Committee | SAT |
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| Conference Date | 2003/1/10(1days) |
| Place (in Japanese) | (See Japanese page) |
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| Topics (in Japanese) | (See Japanese page) |
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| Registration To | Satellite Telecommunications (SAT) |
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| Language | JPN |
| Title (in Japanese) | (See Japanese page) |
| Sub Title (in Japanese) | (See Japanese page) |
| Title (in English) | LDPC Coded Unitary Space-Time Modulated OFDM in Broadband Mobile Channel |
| Sub Title (in English) | |
| Keyword(1) | OFDM |
| Keyword(2) | LDPC |
| Keyword(3) | USTM |
| 1st Author's Name | Naoki YOSHIMOCHI |
| 1st Author's Affiliation | Dept. of Information and Computer Science, Keio University() |
| 2nd Author's Name | Tomohiro HIRAMOTO |
| 2nd Author's Affiliation | Dept. of Information and Computer Science, Keio University |
| 3rd Author's Name | Atsushi MIZUKI |
| 3rd Author's Affiliation | Dept. of Information and Computer Science, Keio University |
| 4th Author's Name | Chang-Jun AHNT |
| 4th Author's Affiliation | Dept. of Information and Computer Science, Keio University |
| 5th Author's Name | Iwao SASASE |
| 5th Author's Affiliation | Dept. of Information and Computer Science, Keio University |
| Date | 2003/1/10 |
| Paper # | DSP2002-199,SAT2002-149,RCS2002-268 |
| Volume (vol) | vol.102 |
| Number (no) | 548 |
| Page | pp.pp.- |
| #Pages | 6 |
| Date of Issue | |