Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 10 of 10 for “"AM-PM"”.
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Charakterisierung von Leistungsverstärkern für die Entwicklung neuer und einfacher Vorverzerrungssysteme
… Vorverzerrungssystems und zum Anderen konnten damit Zusammenhänge erkannt werden, aus denen ein neues Vorverzerrungssystem zur Kompensation von Betriebsbedingungsschwankungen entwickelt wurde. Diese Aspekte sind in mobilen Geräten von entscheidender Bedeutung, weil nur sehr einfache Systeme …
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Adaptive Digital Predistortion with Applications for LMDS Systems
… A background on LMDS link design, non-linear amplification, and predistortion is presented to assist the reader. A developed simulation uses AM-AM and AM-PM characteristics obtained from laboratory measurements of a 28 GHz amplifier to determine the effect of several predistortion …
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ΜΕΛΕΤΗ ΚΑΙ ΥΠΟΛΟΓΙΣΜΟΣ ΤΗΣ ΕΠΙΘΥΜΗΤΗΣ ΠΡΟΠΑΡΑΜΟΡΦΩΣΗΣ ΓΙΑ ΤΗΝ ΔΙΟΡΘΩΣΗ ΤΗΣ ΕΙΣΑΓΟΜΕΝΗΣ ΠΑΡΑΜΟΡΦΩΣΗΣ ΣΕ ΜΗ ΓΡΑΜΜΙΚΟΥΣ ΠΟΛΥΕΠΙΠΕΔΟΥΣ ΨΗΦΙ...
… USING M-ARY DIGITAL SCHEMES SUCH AS M-ARY QAM [1.4]. IN FACT M- ARYQAM SCHEMES PRESENT MUCH BETTER POWER/BANDWIDT EFFICIENCY THAN THE EQUIVALENT M-ARY PSK IN AWGN ENVIRONMENT. MOREOVER, COCHANNEL IMMUNITY OF M-ARY QAM IS SUPERIOR TO THAT OF M-ARY PSK BUT IN THE CONTRAST THEY ARE ESPECIALLY …
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Fluvial Response to Intra-Canyon Lava Flows, Owyhee River, Southeastern Oregon
… three different tributary drainages. The flows dammed the Owyhee River, created lakes, and effectively confined the river to the opposite side of the valley from the flows’ entrance. Lava from these flows filled a paleo-Owyhee Canyon to depths of up to 25 m for distances of at least 12 km. …
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Sub-femtosecond optical timing distribution for next-generation light sources
… to realize the long-standing scientific dream to capture chemical and physical reactions with atomic-level spatiotemporal resolution. To achieve this, a high-precision timing system is required to synchronize dozens of radio frequency (RF) and optical sources across kilometer distances with …
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Effects of ovulation-inducing drugs on pregnancy rates of cattle in rural areas after synchronized oestrus and artificial insemination
… therefore pregnancy rates, when injected intramuscularly at the time-of artificial insemination (Al). Frozen-thawed Bonsmara and Nguni semen was used in synchronized cows of different ages, breeds and body condition scores (BCS). The main objective of this study was to evaluate the effect of …
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Diode Predistortion Linearization for Power Amplifier RFICs in Digital Radios
… device in a radio system is the power amplifier (PA). PA inefficiency requires increased battery reserves to supply the necessary DC bias current, resulting in larger devices. Alternatively, the length of time between battery charges is reduced for a given battery size, reducing …
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Linearization of RF Power Amplifiers
Linearization of RF power amplifiers is surveyed, reviewed and analyzed. Cartesian feedback is specifically presented as an effective means of linearizing an efficient yet non-linear power amplifier. This reduces amplifier distortion to acceptable levels and enables the transmission of RF signals …
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Supplementation Strategies for Growing and Finishing Beef Cattle on Tall Fescue Pastures in the Southeast
… U.S. does not produce cereal grains at the same output as Midwestern states, a relatively temperate climate and consistent rainfall allow for abundant forage production. Tall fescue dominated pastures in this region provide a high-quality forage source to support consistent cattle growth and …
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Digitally enhanced CMOS RF transmitter with integrated power amplifier
… with integrated 23 dBm, Class-B power amplifier (PA) is fabricated in a 0.13 μm CMOS process. The TX chip is packaged using a low-cost chip-on-board (COB) technique. When 20-MHz bandwidth OFDM signals are transmitted, a high TX average power efficiency is achieved exploiting the dynamic …