2D cubic spline implementation for concurrent dual-band system

Naraharisetti, Naveen; Quindroit, Christophe; Roblin, Patrick; Gheitanchi, Shahin; Mauer, Volker; Fitton, M.P.

doi:10.1109/mwsym.2013.6697739

Cited by 10 publications

(9 citation statements)

References 6 publications

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“…This is based in four NCO parallel components functionality; which mainly comprise an input syntonization word. The expression (18) is applied in order to obtain the syntonization word for dual port outputs; in order to achieve frequency in transient components "I" (cos) and "Q" (sin) respectively, this computation in frequency output signals is given by Table 2 Estimation of the Implemented MPM using VHDL.…”

Section: Dpd Module Implementationmentioning

confidence: 99%

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Modeling memory effects in RF power amplifiers applied to a digital pre-distortion algorithm and emulated on a DSP-FPGA board

et al. 2015

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Section: Dpd Module Implementationmentioning

confidence: 99%

“…Important efforts related to PAs linearization improving memory effects have been developed in [14][15][16][17][18][19]. Other works make use of commercially available design tools, e.g.…”

Section: Introductionmentioning

confidence: 99%

Modeling memory effects in RF power amplifiers applied to a digital pre-distortion algorithm and emulated on a DSP-FPGA board

et al. 2015

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“…Fig. 8 shows the block diagram of the experimental setup, which was also presented in [27] and [28]. It is based on two commercial products, an FPGA Altera Stratix IV development kit [30] connected and clock-synchronized to two similar Analog Devices MSDPD demo boards [31].…”

Section: Time Multiplexing For 2d-dpd Path Sharingmentioning

confidence: 99%

“…Recently, in [27], to simplify the hardware implementation for strong nonlinearities, we have presented a concurrent dualband spline-based DPD.…”

mentioning

confidence: 99%

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FPGA Implementation of Orthogonal 2D Digital Predistortion System for Concurrent Dual-Band Power Amplifiers Based on Time-Division Multiplexing

Quindroit

Naraharisetti

Roblin

et al. 2013

IEEE Trans. Microwave Theory Techn.

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A concurrent dual-band digital predistortion (DPD) system is presented to compensate for the nonlinearity of the radio-frequency power amplifiers (PAs) driven by a concurrent dual-band signal. Recently, a closed-form orthogonal polynomial basis has been introduced showing stability improvement compared with the conventional polynomial. An experimental test bed employing a field-programmable gate array (FPGA) linked to two mixed-signal system boards has also been presented. Based on the FPGA, this paper focuses on the hardware implementation of the new concurrent dual-band orthogonal DPD forward path using time-division multiplexing. Performances are evaluated with an experimental test setup cascading 1-10 W peak PAs and a dual-band signal center frequency spaced by 310 MHz. The lower side band (LSB) and upper side band (USB) are centered at 1890 and at 2200 MHz, respectively. Two signal scenarios are presented combining alternatively 1-carrier wide-band code-division multiple access (WCDMA) and 10-MHz long-term evolution (LTE) signals to a 5-carrier WCDMA signal. Experimental results show that the proposed time-division-multiplexing implementation approach gives similar performance compared with the software implementation with half of the resources. Adjacent channel power ratios (ACPRs) are reduced below 50 dBc and normalized mean-square error (NMSE) close to 40 dB.Index Terms-Concurrent dual-band, digital predistortion (DPD), orthogonal polynomials, power amplifiers (PAs), time-division multiplexing.

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