Orthogonal Vector Approach for Reducing Loadpulling Effect in MIMO Transmitters

In this paper, we propose a low complexity precoding method that is based on orthogonal vector (OV) concept in order to mitigate power amplifier (PA) loadpulling effect in a highly integrated transmitter (Tx) antenna array. The precoder is designed by summing an excitation vector that is orthogonal...

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Veröffentlicht in:2024 54th European Microwave Conference (EuMC) S. 1106 - 1109
Hauptverfasser: Hou, Jiayu, Fan, Haijun, Ding, Yuan, Goussetis, George
Format: Tagungsbericht
Sprache:Englisch
Veröffentlicht: European Microwave Association (EuMA) 24.09.2024
Schlagworte:
Antenna arrays
Complexity theory
highly integrated array
Loaded antennas
loadpulling effect
Microwave amplifiers
Microwave theory and techniques
orthogonal vector (OV)
power amplifier (PA)
Power amplifiers
Precoding
Receivers
Transmitting antennas
Vectors
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Zusammenfassung:In this paper, we propose a low complexity precoding method that is based on orthogonal vector (OV) concept in order to mitigate power amplifier (PA) loadpulling effect in a highly integrated transmitter (Tx) antenna array. The precoder is designed by summing an excitation vector that is orthogonal to the channel state information (CSI) to the conventional zeroforcing (ZF) precoder. In this way the equal constant power (CP) signals can be synthesized and injected into all PAs at each time instant, in the meantime the orthogonality ensures that the additive vector has no impact on the signal at the intended receiver (Rx). The simulations have been performed, and it shows that the proposed precoder can reduce the loadpulling effect with a low complexity algorithm.
DOI:10.23919/EuMC61614.2024.10732692