ABSTRACT In this paper, we propose a novel predistortion scheme, in which multiple polynomials are used to predistort the input signal instead of a single one, by dividing input signal range into several regions. The recursive least squares (RLS) algorithm is used for optimizing process to minimize the errors between input of predistorter and the output of amplifier. From the simulation results...

Digital subscriber line (DSL) systems transport high-bandwidth data, such as multimedia, to service subscribers over ordinary twisted pair copper wire telephone lines. One of the important components of the DSL system is the line driver (LD) or the power amplifier (PA). The linearity of the LD is crucial to have a high-speed internet. Any non-linearity in the LD will create intermodulation dist...

An all-digital comparator with full input range is presented. It outperforms the nowaday all-digital comparators with its large rail-torail input range. This is achieved by the proposed “Yin-yang” balance mechanism between the two logic gates: NAND3 and OAI (Or-AndInvert). The important design considerations to achieve this balance are presented, such as the driving strength manipulation and th...

High efficiency and linearity are indispensable requirements of power amplifiers. Unfortunately they are difficult to obtain simultaneously, since high efficiency PAs are nonlinear and linear PAs may have low efficiency. In order to satisfy the efficiency and linearity requirements, designers preferred to prioritize the efficiency of PAs in the design process and to later recover the linearity ...

To reduce the demand for frequently adjusting phase shifts in fifth-generation (5G) multiple-input multiple-output (MIMO) beamforming transmitters, this article, a novel digital predistortion (DPD) technique is proposed, which employs multiple boxes to shape pattern of nonlinear distortions space order linearize targets simultaneously. By using approach, linearization angle widened and thus com...