NDLI: A Direct IQ-Regeneration Technique for Five-Port Digital Receiver

Content Provider	IEEE Xplore Digital Library
Author	Sang-Yub Lee Hak-Sun Kim
Copyright Year	2008
Description	Author affiliation: Wireless Solution Lab., Central R&D Inst., Suwon (Sang-Yub Lee)
Abstract	Many papers have been proposed in order to demonstrate that the multi-port system. The main advantage of the multi-port system is the frequency direct conversion. However, this kind of system must be calibrated for each frequency in order to demodulate the exact inphase (I) and quadrature (Q) signal transmitted and further be compensated to the path errors of multi-port. But, this paper is to show the new method to recover the wanted signals without calibration and iteration procedure to update the information. This technique uses the least square solution using pseudo inverse caused to the singular value decomposition (SVD) receiving matrix of multi-ports. The pseudo-inverse operation can separate desired branches from the observation of multi-port output and this method is introduced in this paper. Also, this paper shows the full digital five port receiver which uses the only digital processor applied the down sampling conception to be low the carrier frequency sampling rate. Except the antenna and low noise amplifier of the analog signals at front-end of the system, this system is consists of the digital five-port network and digital signal processing (DSP) sections. Ultimately, the target of this system is on software defined radio (SDR) system implemented down sampling method and regeneration skill of I and Q signals.
Starting Page	171
Ending Page	174
File Size	2470810
Page Count	4
File Format	PDF
ISBN	9788955191363
ISSN	17389445
DOI	10.1109/ICACT.2008.4493736
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2008-02-17
Publisher Place	South Korea
Access Restriction	Subscribed
Rights Holder	ETRI, NIA
Subject Keyword	Signal sampling Digital signal processing Frequency conversion Calibration Least squares methods Singular value decomposition Matrix decomposition Low-noise amplifiers Radiofrequency amplifiers Signal processing direct conversion receiver Five-port technology calibration IQ-regeneration
Content Type	Text
Resource Type	Article

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