Presentation | 2011-08-26 High Efficient Power Amplification of M-ary Modulated Signal by Spatial Superposition Masayoshi TANAKA, Hiroyasu MADATE, |
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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 an HPA 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 HPAs. 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 amplification |
Paper # | SAT2011-32 |
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Committee | SAT |
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Conference Date | 2011/8/18(1days) |
Place (in Japanese) | (See Japanese page) |
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Paper Information | |
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 by Spatial 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 amplification |
1st Author's Name | Masayoshi TANAKA |
1st Author's Affiliation | Electrical and Electronic Engineering, Graduate School of Industrial Technology, Nihon University() |
2nd Author's Name | Hiroyasu MADATE |
2nd Author's Affiliation | Kyosera Corporation |
Date | 2011-08-26 |
Paper # | SAT2011-32 |
Volume (vol) | vol.111 |
Number (no) | 179 |
Page | pp.pp.- |
#Pages | 6 |
Date of Issue |