In this article, we propose a new robust and highly efficient digital predistortion (DPD) concept for the linearization of wideband RF power amplifiers (PAs). The proposed approach is based on combination parallelized delta-sigma modulator (DSM) forward model PA. This applies multi-rate techniques DSM that incorporates PA in its feedback loop to perform required signal predistortion. Such techn...

Осуществление передачи сигналов сотовой связи — одна из ключевых задач современного мира. Для улучшения сигнала передаваемой информации необходимо чтобы сигнал не искажался при усилении мощности на базовой станции связи. Поставленную задачу можно решать самыми различными способами, однако одним самых простых решений, которое широко используется в индустрии, является добавление нелинейных искаже...

Wireless communication systems are omnipresent in our everyday life and high standards regarding capacity, reliability, speed and power are naturally expected. In order to satisfy these requirements, more sophisticated and efficient technology is needed. This is especially true for the integrated amplifiers at the transmitter side, which are responsible for the majority of the power consumption...

Power amplifiers are essential components in communication systems and are inherently nonlinear. The nonlinearity creates spectral growth beyond the signal bandwidth, which interferes with adjacent channels. It also causes distortions within the signal bandwidth, which decreases the bit error rate at the receiver. In digital predistortion system, an inverse characteristic of power amplifier is ...

Switched capacitor power amplifiers (SCPAs) are a class of digital transmitters which have shown promising results for high linearity with good DE. Their is limited by AM-PM distortion, caused difference in output conductance switching and non-switching driver cells. Often, DPD required to transmit higher order modulation schemes. In this letter, cell implementation as an inverter drain resisto...

An efficient adaptive predistortion technique is proposed to compensate linear or nonlinear distortions caused by a high-power amplifier (HPA) with memory in OFDM communication systems. Previous adaptive predistortion techniques, based on Volterra series, are not suitable for real-time implementation due to high computational burden and slow convergence rate. In the proposed approach, the memor...

The nonlinearity inherent in the Traveling Wave Tube (TWT) amplifier distorts amplified signals and results in reduced efficiency and bandwidth, limiting its use in communication and electronic countermeasure applications. Signal predistortion is an effective technique for suppressing nonlinear distortion in TWTs that provides high suppression and requires simple circuits for implementation. Wh...