Zero crossing algorithm based phase recovery for DPLL based wireless communication

Bhattacharyya, Sabyasachi; Purkayastha, Basab Bijoy; Ahmed, Ragib Nasir; Bhattacharyya, Kaustubh

doi:10.1109/ccaa.2015.7148571

Cited by 8 publications

(8 citation statements)

References 9 publications

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“…DPLL algorithms could be efficiently implemented for recovery of crucial signals in the field of instrumentation, speech signals, regeneration of internal clock in CPUs, voice band signals etc [3]. Zero Crossing Rate is a very useful parameter for determining frequency and phase related information of a signal as it gives a very accurate measure of both these parameters [4] [5]. Keeping all these aspects in mind, in this piece we have proposed a model for Zero Crossing Algorithm based Digital Phase Locked Loop for phase recovery of a wide range of signals.…”

Section: Introductionmentioning

confidence: 99%

Zero crossing DPLL based phase recovery system and its application in wireless communication

Bhattacharyya

Ahmed

Purkayastha

et al. 2015

2015 International Conference on Computer, Communication and Control (IC4)

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Proper tracking of signals at any intermediate stage of a processing system or at the receiver of modern day communication systems has been given much importance over the last two decades. Proper tracking of the signal envelope is evidently very necessary; for communication systems, to recover the message signal that was transmitted with minimum error whereas for signal processing applications, to regenerate the signal in its most precise form by removing unwanted noise, harmonics, undesired frequency components etc. To develop a system which would be able to track a wide range of signals accurately, a generalized parameter should be available to us which would define all signals accurately. The 'instantaneous phase' information of the signal is kept intact and thus it is a very vital parameter to represent any signal. Thus, if the instantaneous phase of the signal is properly tracked, the signal can be easily regenerated. In recent times, DPLL algorithms have emerged as an efficient technique for phase recovery and considering this aspect, a Zero Crossing Algorithm based DPLL system for phase recovery is proposed.

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Section: Introductionmentioning

confidence: 99%

Zero crossing DPLL based phase recovery system and its application in wireless communication

Bhattacharyya

Ahmed

Purkayastha

et al. 2015

2015 International Conference on Computer, Communication and Control (IC4)

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“…The NCO determines the accurate phase value using the lookup information of dibit-phase mapper. The accurate phase is further mapped to the correct dibits using the phasedibit mapper to reduce the need for complicated branched QPSK demodulation as suggested in [2,3,5].…”

Section: Figure 1 Parallelized Pfd Based Modified Lspf-dpllmentioning

confidence: 99%

“…Certain DPLL designs however emphasize on significant reduction in BER levels and therefore involve intensive computations which lead to poor time performance [2,3]. The LSPF-DPLL in [2] additionally also involves another hugely time-intensive LSPF based PFD unit.…”

Section: Introductionmentioning

confidence: 99%

“…Popularly referred to as an FM demodulator, DPLL plays diverse roles in communication systems which include recovering carrier information in noncoherent systems where the channel state is not known to the receiver [2], symbol retrieval in coherent links for known channel [3], multi-clock synchronization and clock distribution into different sub-systems using divider unit in PLLs besides time synchronizing such systems [2]. DPLL based packages have therefore been emphasized as standalone means of reception in recent wireless communication setups [3].…”

Section: Introductionmentioning

confidence: 99%

“…The proposed system exhibits improved time jitter performance and widened lock-in range. The ZC-DPLL proposed for Rayleigh faded channels in [3] utilizes the conclusions of ZC Algorithm in its PFD and retrieves the original phase of transmitted QPSK symbols. The system exhibits excellent error rates but the intensive Left/Right (L/R) Shift algorithm leads to poor time performance.…”

Section: Introductionmentioning

confidence: 99%

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A Parallelized Phase-Frequency Detector based Modified LSPF-DPLL for Wireless Communication – Comparative Study with Modified LSPF-DPLL

et al. 2016

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Abstract. In recent times, communication technologies have evolved at a brisk rate. 3G and 4G networks have already been widely deployed. However, with increase in user number and applications, alternative strategies in the form of 5G systems have been devised. Thus, it is desirable to have communication systems which can provide low error levels with minimum delay. DPLL based systems play a versatile role in modern day communication receivers. Popular DPLL receiver packages based on Zero Crossing (ZC) and Least Square Polynomial Fitting (LSPF) techniques have been recently proposed to serve standalone reception in communcation setups. Such systems involve intensive computations and thus show excellant error performance ; but are bottlenecked by poor time performance. The LSPF-DPLL system was aided by a Modified Phase Resolving Numerically Controlled Oscilator (MPR-NCO) to achieve both improved error and time performance in another subsequent DPLL design that was proposed of late. This design is modified in the DPLL system proposed here by incorporating a Parallelized LSPF based PhaseFrequency Detector to achieve furhter improvements in time performance while maintaining the system's error performance..

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Implementation of Digital Lock-in Amplifier

Bhattacharyya

Ahmed

Purkayastha

et al. 2016

J. Phys.: Conf. Ser.

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Zero crossing algorithm based phase recovery for DPLL based wireless communication

Cited by 8 publications

References 9 publications

Zero crossing DPLL based phase recovery system and its application in wireless communication

Zero crossing DPLL based phase recovery system and its application in wireless communication

A Parallelized Phase-Frequency Detector based Modified LSPF-DPLL for Wireless Communication – Comparative Study with Modified LSPF-DPLL

Implementation of Digital Lock-in Amplifier

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