Analysis of distortion in pulse modulation converters for switching radio frequency power amplifiers
نویسندگان
چکیده
منابع مشابه
Analysis of Distortion in Pulse Modulation Converters for Switching Radio Frequency Power Amplifiers
High efficiency linear radio frequency (RF) power amplifiers (PAs) are needed for today’s wireless communication systems. Switch mode techniques have the potential for high efficiency but require a pulse drive signal. The generation of pulse width modulated signals and pulse position modulated signals by sigma delta modulators can introduce unwanted spectral components. Third order and image co...
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اندیشمندان و صاحب نظران علوم اجتماعی بر این باورند که مرحله تازه ای در تاریخ جوامع بشری اغاز شده است. ویژگیهای این جامعه نو را می توان پدیده هایی از جمله اقتصاد اطلاعاتی جهانی ، هندسه متغیر شبکه ای، فرهنگ مجاز واقعی ، توسعه حیرت انگیز فناوری های دیجیتال، خدمات پیوسته و نیز فشردگی زمان و مکان برشمرد. از سوی دیگر قدرت به عنوان موضوع اصلی علم سیاست جایگاه مهمی در روابط انسانی دارد، قدرت و بازتولید...
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The distortion produced by a typical solid-state Class-B power amplifier is shown to consist of eight mechanisms, all of which may coexist and whose distortion products overlap to give a complex result. Methods for isolating each mechanism for study, and minimising its contribution, are given. If the avoidable distortions are designed out, Class-B amplifiers of unusually low distortion (Below 0...
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Electron tube amplifiers may make use of either radio-frequency amplification or audio-frequency amplification, or both. Radio-frequency amplification consists in the amplification of the received radio-frequency current before it is detected. The use of radio-frequency amplification makes it possible to receive a very weak signal which can not be heard at all if only audio-frequency amplificat...
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Future wireless networks are expected to provide ubiquitous access to high data rate services with a quality up to — and even beyond — today’s common standards for fixed-line connections. To achieve this goal, modulation schemes with a high spectral efficiency need to be utilised. However, these schemes are very susceptible to nonlinear distortions. On the other hand, the radio frequency power ...
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ژورنال
عنوان ژورنال: IET Microwaves, Antennas & Propagation
سال: 2010
ISSN: 1751-8725
DOI: 10.1049/iet-map.2010.0079