Efficient Baseband Digital Predistorter Using Lut for Power Amplifier (PA) with Memory Effect
نویسندگان
چکیده
منابع مشابه
Efficient Baseband Digital Predistorter Using Lut for Power Amplifier (PA) with Memory Effect
Modern communications systems will have to integrate multiple radio technologies to support a large number of wireless standards (WLAN, WPAN...). This system should operate with third generation (3G) air interface standards, where non constant envelope modulation formats (MQAM, OFDM...) are required. The amplification of a modulated signal with large variation of envelope introduces distortions...
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Power amplifiers (PAs) are inherently nonlinear elements and digital predistortion is a highly cost-effective approach to linearize them. Although most existing architectures assume that the PA has a memoryless nonlinearity, memory effects of the PAs in many applications ,such as wideband code-division multiple access (WCDMA) or orthogonal frequency-division multiplexing (OFDM), can no longer b...
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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...
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Power amplifiers (PAs) are vital components in many communication systems. To be transmitted wirelessly, a signal must be amplified with high fidelity so as to account for attenuation through the channel or propagation medium. The linearity of a PA response constitutes an important factor that ensures signal integrity and reliable performance of the communication system. Unfortunately, PAs are ...
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ژورنال
عنوان ژورنال: American Journal of Electrical and Electronic Engineering
سال: 2014
ISSN: 2328-7365
DOI: 10.12691/ajeee-2-3-3