| Presentation | 2011-02-25 High Efficient Power Amplification of M-ary Modulated Signal : Spatially Superposition Hiroyasu MADATE, Masayoshi TANAKA, |
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| Abstract(in Japanese) | (See Japanese page) |
| Abstract(in English) | This paper presents a new spatial power combining technology suitable for superposed M-ary modulated communication system that can provide efficient use of the frequency resource and transmitted power. Employing M-ary modulation would be effective for broad-band transmission with a frequency-band-limited system. However, an M-ary modulation scheme, such as 16QAM or 64QAM is generally mush more vulnerable to nonlinear distortion from power devices than a conventional QPSK scheme because of large amplitude variation. We propose a new system that incorporates multiple OQPSK modulators and combines their output signals in a vector-sum manner in space to produce an M-ary signal. It was found from this study that the proposed system shows better performance than that of conventional system on the nonlinear transmission channel usually observed in such a power amplifier. This unique configuration enables the reliable transmission of higher data rates with efficient use of power and bandwidth. |
| Keyword(in Japanese) | (See Japanese page) |
| Keyword(in English) | Spatially Superposition / M-ary modulation / 16QAM / 64QAM / OQPSK / HPA / Spectrum / High efficient power |
| Paper # | SAT2010-85 |
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| Conference Information | |
| Committee | SAT |
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| Conference Date | 2011/2/17(1days) |
| Place (in Japanese) | (See Japanese page) |
| Place (in English) | |
| 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) | High Efficient Power Amplification of M-ary Modulated Signal : Spatially Superposition |
| Sub Title (in English) | |
| Keyword(1) | Spatially Superposition |
| Keyword(2) | M-ary modulation |
| Keyword(3) | 16QAM |
| Keyword(4) | 64QAM |
| Keyword(5) | OQPSK |
| Keyword(6) | HPA |
| Keyword(7) | Spectrum |
| Keyword(8) | High efficient power |
| 1st Author's Name | Hiroyasu MADATE |
| 1st Author's Affiliation | Electrical and Electronic Engineering, Graduate School of Industrial Technology, Nihon University() |
| 2nd Author's Name | Masayoshi TANAKA |
| 2nd Author's Affiliation | Electrical and Electronic Engineering, Graduate School of Industrial Technology, Nihon University |
| Date | 2011-02-25 |
| Paper # | SAT2010-85 |
| Volume (vol) | vol.110 |
| Number (no) | 426 |
| Page | pp.pp.- |
| #Pages | 6 |
| Date of Issue | |