Analysis and comparison of Direct Digital Frequency Synthesizers implemented on FPGA

Genovese, Mariangela; Napoli, Ettore; De, Davide; Petra, Nicola; Strollo, A.G.M.

doi:10.1016/j.vlsi.2013.09.001

Cited by 15 publications

(3 citation statements)

References 37 publications

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“…On other side CORDIC based implementations [8] requires highly iterative computation which cause significant delay overhead. Moreover due to its Trigonometric measures sine and cosine signals are generated using highly complex architecture in CORDIC, which reduces its potential merits for DDFS implementation [9]- [10].…”

Section: Direct Digital Frequency Synthesiser (Ddfs)mentioning

confidence: 99%

Design of Digital Frequency Synthesizer for 5G SDR Systems

C¹,

Munaswamy²

2022

IJRITCC

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The previous frequency synthesizer techniques for scalable SDR are not compatible with high end applications due to its complex computations and the intolerance over increased path interference rate which leads to an unsatisfied performance with improved user rate in real time environment. Designing an efficient frequency synthesizer framework in the SDR system is essential for 5G wireless communication systems with improved Quality of service (QoS). Consequently, this research has been performed based on the merits of fully digitalized frequency synthesizer and its explosion in wide range of frequency band generations. In this paper hardware optimized reconfigurable digital base band processing and frequency synthesizer model is proposed without making any design complexity trade-off to deal with the multiple standards. Here fully digitalized frequency synthesizer is introduced using simplified delay units to reduce the design complexity. Experimental results and comparative analyzes are carried out to validate the performance metrics and exhaustive test bench simulation is also carried out to verify the functionality.

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Section: Direct Digital Frequency Synthesiser (Ddfs)mentioning

confidence: 99%

Design of Digital Frequency Synthesizer for 5G SDR Systems

C¹,

Munaswamy²

2022

IJRITCC

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“…The DDS implemented in the FPGA is a core part of automatic resonance frequency tracking, since it has the advantages of high frequency resolution, short tuning latency, fast frequency switching speed, wide frequency adjustment range and is programmable [28][29][30]. The DDS output frequency can be expressed as f 0 = K 2 N f s , where K is the frequency control word, N is the word length of the phase accumulator, and f s is the sampling clock.…”

Section: Resonance Frequency Tracking Modulementioning

confidence: 99%

A dual closed-loop drive and control system of photoelastic modulator for atomic magnetometer

Quan¹,

Wang²,

Zhai³

2018

Meas. Sci. Technol.

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Resonance frequency shift and vibration amplitude instability can occur during the operation processes of photoelastic modulators in atomic magnetometers, resulting in low driving efficiency and unstable modulation amplitudes. To solve these problems, a dual closed-loop drive and control system for photoelastic modulators based on a field-programmable gate array has been developed, which includes a resonance tracking loop and a phase modulation amplitude stabilization loop. According to the relationship between the photoelastic modulator's resonance frequency and the phase difference of its voltage and current, a resonance tracking strategy based on a direct digital synthesizer can automatically track the photoelastic modulator's resonance frequency. A proportional integral derivative controller is used to stabilize the modulation amplitude. The experimental results demonstrate that the designed system is effective, since it is able to lock the phase difference at 1.0209° with a maximum deviation of 0.0036° and has a 7.7% higher modulation amplitude stability performance than that of a commercial controller over 60 min. This can improve the performance of photoelastic modulation detection systems in atomic magnetometers. In particular, the designed system is flexible, efficient and adaptable because of the softwarebased control algorithm.

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“…DDFS (direct digital frequency synthesis) is the most widely used scheme for digital implementation 11,12 . It is incorporated into instrumentation as well as music synthesis.…”

Section: Hardware Sound Generationmentioning

confidence: 99%

Integrating Computer Engineering Labs with a "Sound Theme"

Chu¹

2016 ASEE Annual Conference &Amp; Exposition Proceedings

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Analysis and comparison of Direct Digital Frequency Synthesizers implemented on FPGA

Cited by 15 publications

References 37 publications

Design of Digital Frequency Synthesizer for 5G SDR Systems

Design of Digital Frequency Synthesizer for 5G SDR Systems

A dual closed-loop drive and control system of photoelastic modulator for atomic magnetometer

Integrating Computer Engineering Labs with a "Sound Theme"

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