DocumentCode :
3155538
Title :
Study of direct-conversion transmitter pulling effects in constant envelope modulation systems
Author :
Hsiao, Chieh-Fu ; Li, Cong ; Wang, F. ; Horng, Tzyy-Sheng ; Peng, K.
Author_Institution :
National Sun Yat-Sen University, Kaohsiung, Taiwan
fYear :
2010
fDate :
23-28 May 2010
Firstpage :
1
Lastpage :
1
Abstract :
This paper aims to study the local oscillator (LO) pulling effects on a wireless direct-conversion transmitter (DCT) that uses constant envelope modulation. A phase dynamic model for a phase-locked loop (PLL) under directly modulated self-injection is proposed to predict the degraded phase noise performance for a LO pulled by a feedback modulation signal from the power amplifier output. In addition, the model can analyze the deterioration of the transmit signal quality due to such pulling effects. Comparison between the theoretical and experimental results shows excellent agreement.
Keywords :
Degradation; Discrete cosine transforms; Local oscillators; Output feedback; Phase locked loops; Phase modulation; Phase noise; Power system modeling; Predictive models; Transmitters;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Microwave Symposium Digest (MTT), 2010 IEEE MTT-S International
Conference_Location :
Anaheim, CA
ISSN :
0149-645X
Print_ISBN :
978-1-4244-6056-4
Electronic_ISBN :
0149-645X
Type :
conf
DOI :
10.1109/MWSYM.2010.5518205
Filename :
5518205
Link To Document :
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