Title :
Performance evaluation of π/4 DQPSK wireless communication system with direct-conversion
Author :
Yokota, Yuji ; Yoshida, Takuro ; Nojima, Daisuke ; Nagao, Yuhei ; Kurosaki, Masayuki ; Ochi, Hiroshi
Author_Institution :
Kyushu Inst. of Technol., Fukuoka, Japan
Abstract :
Recently, there has been a shift from analog to digital wireless communication systems among those used for wireless communication systems. Promotion of the digitization of wireless communication systems has drawn attention to direct-conversion (DC) receivers as means of reducing the cost of digital wireless communication equipment. In this paper, we propose an algorithm for estimating and compensating for Carrier Frequency Offset (CFO) and I/Q imbalance (IQI) caused by DC architecture. This algorithm which uses two preambles improves the algorithm proposed in [9] which is unstable at CFO values near 0 Hz. This paper evaluates the performance of a baseband simulator for an ARIB STD-T61 compliant direct-conversion π/4-DQPSK wireless communication system in a Rayleigh fading.
Keywords :
Rayleigh channels; analogue-digital conversion; compensation; differential phase shift keying; quadrature phase shift keying; radio receivers; signal reconstruction; π/4 DQPSK; ARIB STD-T61; CFO; DC architecture; I/Q imbalance compensation; Rayleigh fading; analog to digital conversion; baseband simulator; carrier frequency offset; digital wireless communication equipment; direct conversion receiver; performance evaluation; wireless communication system; Baseband; Correlation; Demodulation; Equations; Mobile communication; Receivers; Wireless communication; π/4 DQPSK; ARIB STD-T61; CFO; Direct-conversion; IQI;
Conference_Titel :
Advanced Communication Technology (ICACT), 2012 14th International Conference on
Conference_Location :
PyeongChang
Print_ISBN :
978-1-4673-0150-3
