| Presentation | 1994/12/9 Frequency-power trade-off characteristics of linear modulation systems Kazuhiro Miyauchi, Yoichiro Igarashi, |
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| Abstract(in Japanese) | (See Japanese page) |
| Abstract(in English) | Frequency-power trade-off characteristics of various linear modulation schemes are calculated,compared and discussed with the peak power constraint in transmission systems employing power amplification after filtering.Cosine rolloff frequency response is assumed as the overall transmission characteristics.Considering realizability of practical systems,the discussion includes the case in which the rolloff factor is confined within a range of 0.3 to 1.0. The following conclusion is obtained for the case that the allocation of rolloff characteristics to transmitter and receiver is optimized so as to get maximum power efficiency for a specified frequency efficiency.In case of modulation schemes without coding, OQPSK,π, 4QPSK,7HEX,12CROSS,19HEX and 37HEX are optimum in order o f the frequency efficiency from 1 to 4.Trellis-coded 8PSK of 4 states has almost the same power efficiency as OQP5K and π/4QPSK.T rellis-coded 16QAM of 4 states has almost the same power efficiency as 7 HEX.Trellis-coded 32CROSS has better power efficiency than uncoded 12CROSS and 19HEX. |
| Keyword(in Japanese) | (See Japanese page) |
| Keyword(in English) | linear modulation scheme / transmitting power efficiency / frequency efficiency / signal constellation / optimum allocation factor |
| Paper # | STA94-75,MW94-98 |
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| Conference Information | |
| Committee | SAT |
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| Conference Date | 1994/12/9(1days) |
| Place (in Japanese) | (See Japanese page) |
| Place (in English) | |
| Topics (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) | Frequency-power trade-off characteristics of linear modulation systems |
| Sub Title (in English) | |
| Keyword(1) | linear modulation scheme |
| Keyword(2) | transmitting power efficiency |
| Keyword(3) | frequency efficiency |
| Keyword(4) | signal constellation |
| Keyword(5) | optimum allocation factor |
| 1st Author's Name | Kazuhiro Miyauchi |
| 1st Author's Affiliation | Department of Electrical Engineering,Faculty of Engineering, Science University of Tokyo() |
| 2nd Author's Name | Yoichiro Igarashi |
| 2nd Author's Affiliation | Department of Electrical Engineering,Faculty of Engineering, Science University of Tokyo |
| Date | 1994/12/9 |
| Paper # | STA94-75,MW94-98 |
| Volume (vol) | vol.94 |
| Number (no) | 386 |
| Page | pp.pp.- |
| #Pages | 7 |
| Date of Issue | |