Paper Info
Title
Application Of Real Zero Concept To Coherent Detector For Quadrature Amplitude Modulation
Abstract
This paper proposes a new coherent detector that exploits the real zero (RZ) concept for signal recovery. The detector recovers the complex envelope consisting of in-phase (I) and quadrature (Q) components of linear quadrature amplitude modulation (QAM). The received signal before amplification is processed by RZ conversion, after which the converted signal can be amplified by a severely distorted amplifier. The RZ conversion combines the modulated received signal with a sinusoidal wave whose frequency is slightly outside the modulated frequency band, and the resultant signal is amplified to a saturated level. Next, the IQ detection applies the RZ concept to the IQ signal recovery. It utilizes a time to digital converter (TDC) for RZ timing estimation. A linear interpolation type TDC is introduced. Computer simulations demonstrate the effectiveness of the proposed detector. It is shown that error vector magnitude (EVM) of the recovered complex envelope is around -30 to -40 dB for a narrowband signal.
Year
DOI
Venue
2010
10.1109/PIMRC.2010.5671766
2010 IEEE 21ST INTERNATIONAL SYMPOSIUM ON PERSONAL INDOOR AND MOBILE RADIO COMMUNICATIONS (PIMRC)
Keywords
Field
DocType
computer simulation,gain,baseband,linear interpolation,detectors,sinusoidal wave,signal processing,qam,gold,tdc,time to digital converter,frequency modulation,quadrature amplitude modulation,error vector magnitude
Quadrature modulation,Quadrature amplitude modulation,Control theory,Optics,Pulse-frequency modulation,Real-time computing,Analog transmission,Amplitude modulation,In-phase and quadrature components,Pulse-amplitude modulation,Detector,Mathematics
Conference
Citations 
PageRank 
References 
0
0.34
2
Authors
4
Name
Order
Citations
PageRank
Hiroki Ishibashi100.34
Hiroshi Suzuki216226.01
Kazuhiko Fukawa321239.25
Satoshi Suyama419231.05