Linearization Trade-Offs in a 5G mmWave Active Phased Array OTA Setup
| Autor: | Yunfeng Li, Gert Frølund Pedersen, Feridoon Jalili, Felice Francesco Tafuri, Ming Shen, Ole Kiel Jensen |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2020 |
| Předmět: |
General Computer Science
Phased array Computer science 020208 electrical & electronic engineering Transmitter General Engineering Adjacent channel power ratio Linearity 020206 networking & telecommunications 02 engineering and technology millimeter wave (mmWave) Antenna array Linearization digital pre-distortion (DPD) over the air (OTA) 0202 electrical engineering electronic engineering information engineering Electronic engineering power amplifier (PA) General Materials Science single input single output (SISO) Radio frequency lcsh:Electrical engineering. Electronics. Nuclear engineering Antenna (radio) lcsh:TK1-9971 Active phased array (APA) |
| Zdroj: | Jalili, F, Tafuri, F F, Jensen, O K, Li, Y, Shen, M & Pedersen, G F 2020, ' Linearization Trade-Offs in a 5G mmWave Active Phased Array OTA Setup ', IEEE Access, vol. 8, 9116970, pp. 110669-110677 . https://doi.org/10.1109/ACCESS.2020.3002348 IEEE Access, Vol 8, Pp 110669-110677 (2020) |
| DOI: | 10.1109/ACCESS.2020.3002348 |
| Popis: | The new generation of 5G mobile communication systems is using millimeter wave (mmWave) active phased arrays (APA) which have up to hundreds of individual analog transmitter and receiver chains and antennas. For these highly integrated systems linearization of each analog path is very challenging. Therefore a single input single output (SISO) system in combination with over the air (OTA) measurement is considered as an efficient approach for linearization. However, the knowledge about the dependency of the total SISO nonlinearity on the contributions from different blocks in the antenna array, as well as the linearization trade-offs is still missing. In this paper, an overview of the possible linearization trade-offs in an OTA setup with a mmWave APA is provided. The linearization technique is applied to a 4times 4 active phased array containing up-conversion of a sub 6 GHz LTE10 signal to an RF frequency of 28 GHz. Through measurements, the effects on adjacent channel power ratio (ACPR) and error vector magnitude (EVM) have been investigated for the following scenarios: i. impact from the up-converter, ii. impact of the steering angle due to antenna crosstalk and iii. a linearity comparison between a linearized and a backed-off system. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|