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Circuit Parameter Optimization and Significantly Enhanced ACPR of W-CDMA Signals of Feedforward Analog Optical Transmitter through Systemetic Approach  

Lee Joon-Jae (Microwave and Lightwave Telecommunication Lab., Chung-ang univ.)
Park Sang-Hyun (Microwave and Lightwave Telecommunication Lab., Chung-ang univ.)
Yun Young-Seol (Samchully Co., Ltd)
Moon Yon-Tae (Microwave and Lightwave Telecommunication Lab., Chung-ang univ.)
Choi Young-Wan (Microwave and Lightwave Telecommunication Lab., Chung-ang univ.)
Publication Information
Journal of the Institute of Electronics Engineers of Korea SD / v.43, no.5, 2006 , pp. 17-24 More about this Journal
Abstract
The optical feedforward is known as a complicated technique in spite of its superior linearization. Here we optimized the feedforward circuit parameters using a systematic approach for optimum efficiency. A systematic approach was verified by transmission experiments of 2.14 GHz two tones. The compared third order IMD was enhanced by 38 dB for two-tone case. The experimental results for transmission of W-CDMA signals were described. The ACPR was enhanced by 20 dB for 1 W-CDMA carrier and by 16 dB for 3 W-CDMA carriers. Also, noise level was reduced by 7 dB.
Keywords
ACPR;
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