Proceedings ArticleDOI
Wideband acquisition technique for QPSK demodulator
Akanksh Rai,Vaegae Naveen Kumar +1 more
- pp 490-493
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TLDR
A technique based on windowing, Fast Fourier Transform (FFT) and interpolation for input signal frequency estimation is implemented and the efficacy of the technique is verified with extensive simulations in MATLAB.Abstract:
Thispaper describes the design of a wideband acquisition technique for a Quadrature Phase Shift Keying (QPSK) demodulator. The demodulator is designed at a frequency of 70 MHz to cater data rates up to 6 Mbps. The most important requirement of the design process is to have wide acquisition range of ±125 KHz under narrow Phase Lock Loop (PLL) bandwidth and low input Signal to Noise Ratio (SNR). Hence, a technique based on windowing, Fast Fourier Transform (FFT) and interpolation for input signal frequency estimation is implemented. The efficacy of the technique is verified with extensive simulations in MATLAB.read more
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Methodology for Assessing Synchronization Conditions in Telecommunication Devices
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Study of the Influence of Changing Signal Propagation Conditions in the Communication Channel on Bit Error Rate
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Design and Simulation of Synchronization Systems in Telecommunications with QPSK
TL;DR: In this article, the effect of the listed conditions on the errors number dependence in the communication channel on the signal-to-noise ratio (SNR) was investigated, and the possibilities of reducing the effects of signal propagation conditions in a communication channel by using symbolic synchronization, which is based on a phase-locked loop (PLL).
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Mathematical Modelling of Costas Loop under Diversity Combining Technique
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References
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Book
Phaselock Techniques
TL;DR: This book represents the second edition of Gardner's widely known book on phaselock principles and applications, and Gardner has clearly written for the practitioner, providing the necessary information with a minimum of rigor and a succinct writing style.
Proceedings ArticleDOI
Improving FFT Frequency Measurement Resolution by Parabolic and Gaussian Spectrum Interpolation
Marek Gasior,José Luis Gonzalez +1 more
TL;DR: The efficiency of the discrete spectra method, depending on the windowing function applied to the signal samples, is described, offering frequency resolution improvement by more than two orders of magnitude when used with windows having fast sidelobe decay.