Title :
Linearised Mixer System Using a Simplified Feedforward Technique for Digital Mobile Communication
Author :
Chongcheawchamnan, Mitchai ; Robertson, Ian D.
Author_Institution :
Microwave and System Research Group(MSRG), School of Electronics Engineering, Information Technology and Mathematics(SCEEITM), University of Surrey, Guildford, UK. eMail: eep3mc@ee.surrey.ac.uk
Abstract :
This paper presents a simplified system of feedforward mixer which can be applied to digital mobile communication. The complexity of the proposed system is reduced from the two-loop structure originally proposed in the modified feedforward system to a single loop only. Compared with a single mixer, two-tone measurement results at 2.0 and 2.0001 GHz demonstrates up to 33 dB IM3 distortion reduction. The spectrum of a downconverted 900 MHz 16-QAM signal to 70 MHz IF using the proposed system illustrated improves a mixer linearity.
Keywords :
Bandwidth; Feedforward systems; Information technology; Linearity; Microwave theory and techniques; Mobile communication; Nonlinear distortion; Phase distortion; RF signals; Radio frequency;
Conference_Titel :
Microwave Conference, 1999. 29th European
Conference_Location :
Munich, Germany
DOI :
10.1109/EUMA.1999.338377
