Real-time simulation of impairments in the analog parts of the transmitter-receiver

Markku Kiviranta, Aarne Mämmelä, Yan Zhang, Ilkka Moilanen, Sandrine Boumard, Timo Sarkkinen, Tommi Jämsä

    Research output: Chapter in Book/Report/Conference proceedingConference article in proceedingsScientificpeer-review

    1 Citation (Scopus)


    We propose a method to simulate impairments caused by the nonideal analog parts of the transmitter-receiver. They include for example a high-power amplifier (HPA), mixers, and oscillators. The major advantage in our approach is that the model parameters are adjustable and the system works in real time in the digital domain. Conventional methods have either not been real time, or they have been implemented with analog circuits. The HPA model is implemented with the coordinate rotation digital computer (CORDIC) algorithm for rectangular to polar translations. A look-up table (LUT) is used for AM/AM and AM/PM distortion. To minimize the size of the LUT we have used cubic spline interpolation. For phase noise of the oscillators we propose a simple rotation mode CORDIC implementation that does not need any complex multiplication. Only one field-programmable gate array (FPGA) circuit is needed to implement the power amplifier and phase noise models.
    Original languageEnglish
    Title of host publication2005 IEEE 61st Vehicular Technology Conference
    PublisherIEEE Institute of Electrical and Electronic Engineers
    ISBN (Print)978-0-7803-8887-1
    Publication statusPublished - 5 Dec 2005
    MoE publication typeA4 Article in a conference publication
    Event2005 IEEE 61st Vehicular Technology Conference, VTC2005-Spring - Stockholm, Sweden
    Duration: 30 May 20051 Jun 2005
    Conference number: 61

    Publication series

    SeriesIEEE Vehicular Technology Conference Proceedings


    Conference2005 IEEE 61st Vehicular Technology Conference, VTC2005-Spring
    Abbreviated titleVTC2005-Spring


    • real-time simulation
    • nonideal analog parts
    • power anplifier
    • phase noise
    • digital arithmetic
    • analogue circuits
    • spline
    • interpolation


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