Title :
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
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;
Journal_Title :
Circuits and Systems I: Regular Papers, IEEE Transactions on
DOI :
10.1109/TCSI.2013.2239156
