A Multi-Band Low-Noise Transmitter With Digital Carrier Leakage Suppression and Linearity Enhancement

Author

Yilei Li ; Kefeng Han ; Chuansheng Dong ; Cheng Zhang ; Yongchang Yu ; Xi Tan ; Na Yan ; Qiang Chen ; Hao Min

Author_Institution

State Key Lab. of ASIC & Syst., Fudan Univ., Shanghai, China

Volume

60

Issue

5

fYear

2013

fDate

May-13

Firstpage

1209

Lastpage

1219

Abstract

A low-noise multi-band transmitter for GSM quad-band and WCDMA is presented. Programmable parameters of the analog baseband and the RF frontend enable adaption for different protocols and frequency bands. A three-step carrier leakage calibration algorithm is proposed to suppress the leakage to -65 dBm at highest RF gain. Novel linearization methods are used in the low-pass filter and the driver power amplifier to meet the demand of 3G systems. The noise floor achieves -157 dBc/Hz at 190 MHz frequency offset in WCDMA band, which eliminates the need for external SAW filter.

Keywords

3G mobile communication; VHF amplifiers; VHF filters; calibration; cellular radio; code division multiple access; interference suppression; low-pass filters; protocols; radio transmitters; radiofrequency interference; radiofrequency power amplifiers; 3G systems; GSM quad-band; RF frontend; RF gain; WCDMA band; analog baseband; digital carrier leakage suppression; driver power amplifier; frequency 190 MHz; frequency bands; frequency offset; linearity enhancement; low-pass filter; multiband low-noise transmitter; novel linearization methods; programmable parameters; protocols; three-step carrier leakage calibration algorithm; Calibration; Linearizaton techniques; Multiaccess communication; Noise; Transmitters; Wireless communication; RF transmitters; carrier leakage; linearization; multi-band; noise; spurious emission;

fLanguage

English

Journal_Title

Circuits and Systems I: Regular Papers, IEEE Transactions on

Publisher

ieee

ISSN

1549-8328

Type

jour

DOI

10.1109/TCSI.2013.2239156

Filename

6495498