Title :
A multiband LTE SAW-less modulator with −160dBc/Hz RX-band noise in 40nm LP CMOS
Author :
Giannini, Vito ; Ingels, Mark ; Sano, Tomohiro ; Debaillie, Bjorn ; Borremans, Jonathan ; Craninckx, Jan
Author_Institution :
Imec, Leuven, Belgium
Abstract :
In this paper, the potential of voltage sampling is conceptually re-examined in a complete TX chain to cover all LTE-FDD bands and beyond, resulting in a highly efficient and flexible architecture. The presented transmitter achieves CNR down to -162dBc/Hz for channel bandwidths up to 20MHz in most LTE-FDD bands, including band XI (1.4GHz carrier/ 48MHz TX-RX offset frequency), band XII (0.7GHz / 30MHz) and band VII (2.5GHz / 120MHz), without the aid of external interstage acoustic filters. Furthermore, the same transmitter provides legacy with all WCDMA FDD scenarios and can be used with other bands/modulations such as GMSK and OFDM-based standards up to 5.5GHz carrier frequency.
Keywords :
Long Term Evolution; OFDM modulation; UHF integrated circuits; code division multiple access; microwave integrated circuits; minimum shift keying; modulators; radio transmitters; GMSK--based standard; LP CMOS; LTE-FDD band; OFDM-based standard; WCDMA FDD scenario; bandwidth 120 MHz; bandwidth 48 MHz; frequency 0.7 GHz; frequency 1.4 GHz; frequency 2.5 GHz; frequency 30 MHz; multiband LTE SAWless modulator; radio transmitter; size 40 nm; voltage sampling; 3G mobile communication; Bandwidth; Mixers; Multiaccess communication; Noise; Spread spectrum communication; Transmitters;
Conference_Titel :
Solid-State Circuits Conference Digest of Technical Papers (ISSCC), 2011 IEEE International
Conference_Location :
San Francisco, CA
Print_ISBN :
978-1-61284-303-2
DOI :
10.1109/ISSCC.2011.5746360
