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| Content Provider | IEEE Xplore Digital Library |
|---|---|
| Author | Suryasarman, P. Hoflehner, M. Springer, A. |
| Copyright Year | 2013 |
| Description | Author affiliation: Inst. for Commun. Eng. & RF-Syst., Johannes Kepler Univ., Linz, Austria (Suryasarman, P.; Hoflehner, M.; Springer, A.) |
| Abstract | This paper proposes a novel cross-talk cancelling pre-distorter (CTC-DPD), which accurately models the cross-talk and nonlinearity in multiple-input multiple-output (MIMO) radio systems, and compensates for these effects. The cross-talk introduced before the power amplifier (PA) in a multi-antenna transmitter, which is termed as non-linear cross-talk degrades the performance of digital pre-distortion (DPD). A cross-over pre-distortion (CO-DPD) that compensates for the cross-talk and non-linearity in multi-antenna transmitters was proposed in [2]. However, CO-DPD ignores the higher order cross-terms between the input signals. As a result, the performance of CO-DPD degrades, as the crosstalk between the branches of the multi-antenna transmitter becomes stronger. In the CTC-DPD structure, linearization and cross-talk compensation are done separately by pre-distorters for the PAs and a cross-talk pre-cancellation block. The performances of pre-distortion techniques for a two-antenna transmitter are evaluated through measurements. It is observed that CTC-DPD achieves an error vector magnitude (EVM) improvement of 1.5% at -15 dB non-linear cross-talk and 0.8% at -20 dB non-linear crosstalk, compared to CO-DPD, for an universal mobile telecommunications system (UMTS) signal. |
| Starting Page | 412 |
| Ending Page | 415 |
| File Size | 570088 |
| Page Count | 4 |
| File Format | |
| ISBN | 9782874870316 |
| DOI | 10.1109/GlobalSIP.2013.6737109 |
| Language | English |
| Publisher | Institute of Electrical and Electronics Engineers, Inc. (IEEE) |
| Publisher Date | 2013-10-06 |
| Publisher Place | Germany |
| Access Restriction | Subscribed |
| Rights Holder | European Microwave Association |
| Subject Keyword | MIMO Polynomials Vectors Integrated circuit modeling Radio transmitters Crosstalk Cross-talk in multi-antenna transmitters Digital pre-distortion Power amplifiers Multiple-input multiple-output (MIMO) transceivers |
| Content Type | Text |
| Resource Type | Article |
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