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1987 IEEE MTT-S International Microwave Symposium Digest, 1987
Phase transients that occur in microwave local oscilIators are discussed. The harmful effects of ... more Phase transients that occur in microwave local oscilIators are discussed. The harmful effects of these transients on coherent digital transmission are evaluated, with emphasis placed on complex modulation schemes such as 64 QAM or 256 QAM. The sources of phase transients are identified, and the methods that quantify these transients are presented along with procedures that ensure phase transient free operation of local oscilIators.
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2005 Asia-Pacific Microwave Conference Proceedings
... Bill Vassilakis is Vice-President Corporate Research and Development at Powerwave Technologie... more ... Bill Vassilakis is Vice-President Corporate Research and Development at Powerwave Technologies, Santa Ana, CA 92705 USA (e-mail: bvassilakis opwav.com) Armando Cova is Principal Engineer, Corporate ... [2] L. Ding, GT Zhou, DR Morgan, Z. Ma, JSKenney, J. Kim, and ...
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International Journal On Advances in Networks …, 2009
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High efficiency amplifier architectures are critical in modern communication systems. Third gener... more High efficiency amplifier architectures are critical in modern communication systems. Third generation cellular systems and the upcoming LTE (Long Term Evolution) networks will continue to demand increasing transmitter efficiency and lower cost. In addition, linearity demands will be more stringent in order to meet the required spectral efficiencies, and the high bit throughput required by network users. INTRODUCTION With each successive generation of commercial cellular system deployment, the architecture of the Base Transceiver Station (BTS) has become more challenging. Figure 1 shows a typical high level block diagram, which contains the amplifier module, the LNA section, the required filtering, and the analog or baseband cards that interface with the rest of the system. In early systems, Single Carrier Power Amplifiers (SCPAs) were employed and the power from many transmitters combined with cavity combiners resulted poor efficiency and high losses. In 2 and 3 Generation digital ...
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1987 IEEE MTT-S International Microwave Symposium Digest, 1987
Phase transients that occur in microwave local oscilIators are discussed. The harmful effects of ... more Phase transients that occur in microwave local oscilIators are discussed. The harmful effects of these transients on coherent digital transmission are evaluated, with emphasis placed on complex modulation schemes such as 64 QAM or 256 QAM. The sources of phase transients are identified, and the methods that quantify these transients are presented along with procedures that ensure phase transient free operation of local oscilIators.
Bookmarks Related papers MentionsView impact
2005 Asia-Pacific Microwave Conference Proceedings
... Bill Vassilakis is Vice-President Corporate Research and Development at Powerwave Technologie... more ... Bill Vassilakis is Vice-President Corporate Research and Development at Powerwave Technologies, Santa Ana, CA 92705 USA (e-mail: bvassilakis opwav.com) Armando Cova is Principal Engineer, Corporate ... [2] L. Ding, GT Zhou, DR Morgan, Z. Ma, JSKenney, J. Kim, and ...
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International Journal On Advances in Networks …, 2009
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High efficiency amplifier architectures are critical in modern communication systems. Third gener... more High efficiency amplifier architectures are critical in modern communication systems. Third generation cellular systems and the upcoming LTE (Long Term Evolution) networks will continue to demand increasing transmitter efficiency and lower cost. In addition, linearity demands will be more stringent in order to meet the required spectral efficiencies, and the high bit throughput required by network users. INTRODUCTION With each successive generation of commercial cellular system deployment, the architecture of the Base Transceiver Station (BTS) has become more challenging. Figure 1 shows a typical high level block diagram, which contains the amplifier module, the LNA section, the required filtering, and the analog or baseband cards that interface with the rest of the system. In early systems, Single Carrier Power Amplifiers (SCPAs) were employed and the power from many transmitters combined with cavity combiners resulted poor efficiency and high losses. In 2 and 3 Generation digital ...
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