Presentation 1994/12/9
Frequency-power trade-off characteristics of linear modulation systems
Kazuhiro Miyauchi, Yoichiro Igarashi,
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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 Date 1994/12/9(1days)
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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