Title :
A 130nm CMOS polar quantizer for cellular applications
Author :
Nazari, Peyman ; Byung-Kwan Chun ; Kumar, Vipin ; Middleton, Eric ; Zheng Wang ; Heydari, Payam
Author_Institution :
Nanoscale Commun. IC Labs., Univ. of California, Irvine, Irvine, CA, USA
Abstract :
A polar quantizer is presented for detection and quantization of modulated signals in cellular applications. It consists of amplitude and phase quantizers. A time-to-digital converter (TDC) is designed to measure and quantize the phase, while a typical ADC is used for amplitude quantization. Polar quantizer significantly reduces the sensitivity of the quantizer to amplitude resolution. The 10 bit polar quantizer fabricated in 130nm CMOS achieves 5.5dB of SQNR improvement compared to rectangular quantizer for signal bandwidths as high as 20MHz.
Keywords :
CMOS integrated circuits; cellular radio; quantisation (signal); signal detection; time-digital conversion; CMOS polar quantizer; TDC; amplitude quantizers; cellular applications; modulated signals; phase quantizers; signal detection; signal quantization; size 130 nm; time-to-digital converter; typical ADC; word length 10 bit; Bandwidth; Quantization (signal); Radiation detectors; Radio frequency; Receivers; Ring oscillators; Signal resolution; CMOS; SQNR; modulation; polar; quantizer; time-to-digital converter (TDC);
Conference_Titel :
Radio Frequency Integrated Circuits Symposium (RFIC), 2013 IEEE
Conference_Location :
Seattle, WA
Print_ISBN :
978-1-4673-6059-3
DOI :
10.1109/RFIC.2013.6569548
