| Presentation | 2003/8/14 A study on the out-of-band spectrum characteristics improvement and suppression of envelope fluctuation for DS-SS systems Shinji MURAI, Hideichi SASAOKA, |
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| PDF Download Page | PDF download Page Link |
| Abstract(in Japanese) | (See Japanese page) |
| Abstract(in English) | In order to improve the frequency efficiency and transmitted power efficiency, this paper proposes a new method of Direct Sequence Spread Spectrum systems with the application of the narrowband linear modulation scheme with quasi-constant envelope. To reduce the deterioration of synchronous acquisition and phase compensation caused by mutual correlations between orthogonal channels, a method of using orthogonal spread codes between I channels and Q channels is also proposed. A computer simulation was performed to estimate the changes in the envelope and the out-of-band spectrum characteristics. From the simulation using the proposed method, improvements in frequency and power efficiency was confirmed. Improvements in bit error rate characteristics were also confirmed when the codes in I channels and Q channels were orthogonalized. |
| Keyword(in Japanese) | (See Japanese page) |
| Keyword(in English) | DS-SS / quasi-constant / frequency efficiency / transmitted power efficiency |
| Paper # | RCS2003-115 |
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| Conference Information | |
| Committee | RCS |
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| Conference Date | 2003/8/14(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) | A study on the out-of-band spectrum characteristics improvement and suppression of envelope fluctuation for DS-SS systems |
| Sub Title (in English) | |
| Keyword(1) | DS-SS |
| Keyword(2) | quasi-constant |
| Keyword(3) | frequency efficiency |
| Keyword(4) | transmitted power efficiency |
| 1st Author's Name | Shinji MURAI |
| 1st Author's Affiliation | Faculty of Engineering, Doshisha University() |
| 2nd Author's Name | Hideichi SASAOKA |
| 2nd Author's Affiliation | Faculty of Engineering, Doshisha University |
| Date | 2003/8/14 |
| Paper # | RCS2003-115 |
| Volume (vol) | vol.103 |
| Number (no) | 253 |
| Page | pp.pp.- |
| #Pages | 6 |
| Date of Issue | |