Title :
A 12 Gbps analog QPSK baseband receiver based on injection-locked VCO
Author :
Zhongxia He ; Kuykenstierna, Dan ; Szhau Lai ; Zirath, Herbert
Author_Institution :
Dept. of Microtechnol. & Nanosci. (MC2), Chalmers Univ. of Technol., Gothenburg, Sweden
Abstract :
Injection locking based QPSK demodulation have been reported in several publication, however the data rate is less than Gbps. In this paper, the theory of an oscillator injection locks to a wideband modulated signal is studied. Based on the principle study, a proof of concept QPSK coherent baseband receiver is designed and verified. The receiver is able to demodulator QPSK signal with data rate up to at least 12 Gbps, which is limited by the mixer bandwidth. The receiver has a power consumption of 210 mW. It consists of a novel injection-locked VCO (ILVCO) based carrier recovery block, which can be used for even higher data rates if the theoretical condition proposed in this paper is met.
Keywords :
injection locked oscillators; low-power electronics; millimetre wave receivers; mixers (circuits); quadrature phase shift keying; voltage-controlled oscillators; QPSK coherent baseband receiver; QPSK demodulation; analog QPSK baseband receiver; bit rate 12 Gbit/s; carrier recovery block; injection-locked VCO; mixer bandwidth; oscillator injection; power 210 mW; power consumption; wideband modulated signal; Analytical models; Binary phase shift keying; Mixers; Receivers; Signal to noise ratio; Baseband receiver; Coherent detection; Injection lock; Millimeter wave radio; QPSK;
Conference_Titel :
Microwave Symposium (IMS), 2015 IEEE MTT-S International
Conference_Location :
Phoenix, AZ
DOI :
10.1109/MWSYM.2015.7166905
