12 frequency multiplier chain is employed for frequency translation, to evaluate the feasibility of the LINT architecture for generating 16-QAM modulation at 28 GHz. The effect of imperfections on modulator performance is also considered." />


The LINT Modulator--Linear Modulation with Nonlinear Translation

David KLYMYSHYN  Zhen MA  

Publication
IEICE TRANSACTIONS on Electronics   Vol.E85-C   No.12   pp.2000-2007
Publication Date: 2002/12/01
Online ISSN: 
DOI: 
Print ISSN: 0916-8516
Type of Manuscript: Special Section PAPER (Special Issue on Low-Distortion,High-Power,High-Efficiency Active Device and Circuit Technology)
Category: 
Keyword: 
LINT modulator,  direct modulation,  power efficiency,  frequency multiplier,  LINC,  

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Summary: 
A new modulation technique for "LInear modulation with Nonlinear Translation" (LINT) is proposed. The new LINT technique is an extension of the popular LINC (LInear amplification with Nonlinear Components) technique for power efficient transmitter operation with spectrally efficient linear modulations. While providing this advantage, the LINT technique also incorporates the principles of direct modulation and provides frequency translation without the use of multiple stages of bulky upconversion circuitry. These features make the LINT method especially suitable for high frequency applications emerging at upper microwave and millimeter-wave frequencies. A two-stage 12 frequency multiplier chain is employed for frequency translation, to evaluate the feasibility of the LINT architecture for generating 16-QAM modulation at 28 GHz. The effect of imperfections on modulator performance is also considered.