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Cross-over digital predistorter (CO-DPD) and cross-talk canceling predistorter (CTC-DPD) are two important architectures proposed to overcome the harmful effect of RF cross-talk before the power amplifiers (PA) on digital predistortion (DPD) in multiple antenna transmitters. The computational complexity of CO-DPD increases quadratically with the number of transmit antennas. The CTC-DPD which introduces...
Digital predistortion (DPD) is a cost-effective method to linearize power amplifiers (PAs) in modern wireless transceivers. In block-based predistortion, which is a two-step process involving DPD identification and linearization, the linearization performance is related to the PA output power during identification. In this brief, we investigate this relation and find the optimum PA output power in...
This paper proposes adaptive algorithms to implement a cross-talk canceling 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...
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...
Modern cellular networks are inherently interference limited, and therefore, pilot design is extremely important to the overall system performance. The pilots have to be carefully arranged and modulated to track the fading channel as well as to suppress the interference efficiently. 4G wireless systems based on OFDMA use pilot design strategies that can be classified as ‘Data on Pilot’ and ‘Pilot...
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