Title: Linearization of a Multi-Band Multi-target Directional Modulation Transmitter Using Low-Complexity Crosstalk-Cancelled Digital Predistortion
Abstract: This paper presents a multi-band multi-target (MBMT) directional modulation (DM) transmitter with low complexity crosstalk-cancelled digital predistortion (DPD). For a 16QAM 20 MHz bandwidth signal with -20 dB crosstalk, 8.0 dB PAPR, and 0.7 DM power efficiency (PE) level, the corresponding error vector magnitude (EVM) and the adjacent channel power ratio (ACPR) are 2.14% and -50 dBc after the proposed crosstalk-cancelled DPD. Compared with the 2×2 parallel Hammerstein (2×2 PH) DPD, the proposed DPD reduces the computational complexity without sacrificing the linearization performance. It only has 37.5% of the number of coefficients of the 2×2 PH model. To our best knowledge, it is the first time that the nonlinear distortion of the power amplifiers (PA) and the crosstalk between paths are simultaneously considered in an MBMT DM transmitter.
Publication Year: 2019
Publication Date: 2019-06-01
Language: en
Type: article
Indexed In: ['crossref']
Access and Citation
Cited By Count: 1
AI Researcher Chatbot
Get quick answers to your questions about the article from our AI researcher chatbot