A new analog predistortion criterion with application to high efficiency digital radio links
- 1 January 1995
- journal article
- Published by Institute of Electrical and Electronics Engineers (IEEE) in IEEE Transactions on Communications
- Vol. 43 (12) , 2966-2974
- https://doi.org/10.1109/26.477499
Abstract
This paper describes a new approach for designing analog cubic predistorters in view of minimizing non linear distortion introduced by the high power amplifier (HPA) in microwave radio links. The approach is based on a global mean squared error minimization between the input to the predistorter and the output of the power amplifier, rather than on the elimination of the cubic term. In this manner, two advantages are obtained. Firstly, the off-band distortion terms are reduced so that it is possible to eliminate the HF transmission filter. Secondly, the interference produced by the nonlinear distortion can be uniformly distributed over the entire constellation so that it is possible to reduce the back-off value of the HPA. Results of the application of the method proposed to some high spectrally efficient QAM systems, such as the 512-QAM system, are presenteKeywords
This publication has 15 references indexed in Scilit:
- Performance analysis of digital radio links with nonlinear transmit amplifier and data predistorter with memoryPublished by Institute of Electrical and Electronics Engineers (IEEE) ,2003
- Multipath Fading Models and Adaptive Equalizers in Microwave Digital RadioIEEE Transactions on Communications, 1984
- An Automatically Controlled Predistorter for Multilevel Quadrature Amplitude ModulationIEEE Transactions on Communications, 1983
- Nonlinear Equalization of Digital Satellite ChannelsIEEE Journal on Selected Areas in Communications, 1983
- Effects of Multipath Propagation on Digital RadioIEEE Transactions on Communications, 1981
- More on the Multipath Fading Channel ModelIEEE Transactions on Communications, 1981
- Digital Radio Outage Due to Selective Fading-Observation vs Prediction From Laboratory SimulationBell System Technical Journal, 1979
- A New Selective Fading Model: Application to Propagation DataBell System Technical Journal, 1979
- Maximum Likelihood Sequence Estimation of Binary Sequences Transmitted Over Bandlimited Nonlinear ChannelsIEEE Transactions on Communications, 1977
- Compensators for Bandpass Nonlinearities in Satellite CommunicationsIEEE Transactions on Aerospace and Electronic Systems, 1976