Performance of an Adaptive Predistorted Power Amplifier with Peak Limited Baseband Code-Division Multiplexed Signal.
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Accession number;03A0117000
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| Title;Performance of an Adaptive Predistorted Power Amplifier with Peak Limited Baseband Code-Division Multiplexed Signal. |
| Author;
MIZUTA SHINJI
(NTT DoCoMo, Inc., Wireless Res. Lab., JPN)
KAWAGUCHI HIROKO
(Kyushu Univ., Graduate School of Information Sci. and Electrical Engineering, JPN)
AKAIWA YOSHIHIKO
(Kyushu Univ., Graduate School of Informaiton Sci. and Electrical Engineering, JPN)
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Journal Title;IEICE Transactions on Communications (Japanese Edition)
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Journal Code:S0622C
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ISSN:1344-4697
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VOL.J86-B;NO.2;PAGE.129-137(2003)
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| Figure&Table&Reference;FIG.20, TBL.1, REF.9 |
| Pub. Country;Japan |
| Language;Japanese |
| Abstract;On FDM and CDM, by increasing numbers of multiplexed signal, peak to average power ratio (PAPR) also increases. When inputting signals with large PAPR into a power amplifier, out-band radiation power increases or power efficiency decreases. As methods to solve such problems, there are non-linear strain compensation systems, one of which is predistorter. And, for another solving system, it can be consider to control PAPR of input signals. In this paper, was investigated at first on features when using a limiter for CDM signals at base band. By computer simulation, could be shown that by using a limiter PAPR could be controlled, and that when PAPR was more than 6 dB, deterioration of SIR features were small. And then, features when inputting to an adaptive pretorted strain compensation type power amplifier proposed by authors were examined by using computer simulation. By combining CDM signals using a limiter and an adaptive predistorted strain compensation type power amplifier, it could be established to control out-band radiation power and simultaneously upgrade power efficiency. |
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