Distortion Issues in Direct Conversion Transmitters

نویسندگان

  • Praju Prathap
  • L. Punitha
چکیده

In the wireless communication systems, due to the increasing demands for high data rate and high efficiency, several practical challenges arise in the design of directconversion trans-mitters. According to the existing literatures, power amplifier (PA) nonlinearity and local oscillator (LO) pulling are the most critical factors to deteriorate the transmit signal quality. In this work, the above two issues are carefully investigated so as to improve the resultant distortion of the DCT output signal. An integrated approach for PA linearization and anti-LO pulling is designed.

برای دانلود رایگان متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید

ثبت نام

اگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید

منابع مشابه

The Expected Achievable Distortion of Two-User Decentralized Interference Channels

This paper concerns the transmission of two independent Gaussian sources over a two-user decentralized interference channel, assuming that the transmitters are unaware of the instantaneous CSIs. The availability of the channel state information at receivers (CSIR) is considered in two scenarios of perfect and imperfect CSIR. In the imperfect CSIR case, we consider a more practical assumption of...

متن کامل

Q-enhancement in RF CMOS Filters Case Study: Direct Conversion Transmitters for UMTS

Unified RF requirements are derived for an UTRA/FDD com-pliant mobile transceiver. Consideration of system issues,multi-mode operation, and interfacing concerns leads to de-tailed receiver and transmitter calculations based on exist-ing UMTS specifications. Finally, compliant and design-compatible transceiver requirements are derived.KeywordsRF Transceiver, UTRA/...

متن کامل

Design Considerations for Direct-Conversion Receivers

This paper describes the issues and tradeoffs in the design and monolithic implementation of direct-conversion receivers and proposes circuit techniques that can alleviate the drawbacks of this architecture. Following a brief study of heterodyne and image-reject topologies, the direct-conversion architecture is introduced and effects such as dc offset, I=Q mismatch, even-order distortion, flick...

متن کامل

Linearization of High Efficiency Transmitters for Wireless Communications

In recent years, reducing energy consumption in wireless communication systems has gained prominence. In order to achieve this energy saving, high power efficiency is necessary for the wireless transmitters used. Unfortunately, wireless transmitters usually exhibit severe distortion when acquiring high efficiency, mainly due to the design of power amplifiers. Also, RF modulators, which are buil...

متن کامل

Active Components IQ modulators advance reconfigurable radio

T popularity of reconfigurable radios is increasing as wireless infrastructure equipment manufacturers try to design platforms that cover multiple frequencies and air interfaces. The market continues to strive to achieve the ideal of a softwaredefined radio (SDR). While this research continues, incremental developments are taking place that provide common platform designs. Designs are then conf...

متن کامل

ذخیره در منابع من


  با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید

عنوان ژورنال:

دوره   شماره 

صفحات  -

تاریخ انتشار 2017