Parameter Derivation of Type-2 Discrete-Time Phase-Locked Loops Containing Feedback Delays

Wilson, Joey; Nelson, Amy; Farhang‐Boroujeny, Behrouz

doi:10.1109/tcsii.2009.2034197

Cited by 9 publications

(6 citation statements)

References 10 publications

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“…Subsequently, while the carrier and timing tracking loops were active or deactivated, the performance of the receiver in detecting the payload information symbols was studied. For the carrier tracking loop filter we followed [62] and designed a proportional and integrator loop that also counts for the delay caused by the analysis filter bank. The filter parameters that were calculated for a critically damped PLL were obtained as K p = 0.1208, for the proportional gain, and K I = 0.0068, for the integrator gain.…”

Section: Simulation Resultsmentioning

confidence: 99%

Packet Format Design and Decision Directed Tracking Methods for Filter Bank Multicarrier Systems

Amini

Farhang‐Boroujeny

2010

EURASIP J. Adv. Signal Process.

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Packetized data transmission is commonly used in wireless communication systems. Each packet starts with a preamble which is used to synchronize the receiver with carrier frequency of the incoming signal, to find a good timing phase, and to identify the channel impulse response or to adjust a set of channel equalizer parameters. In this paper, following the same philosophy, we develop a packet format for multicarrier systems that operate based on filter banks, filter bank multicarrier (FBMC) systems. The related algorithms for carrier frequency and timing recovery as well as channel identification/equalizer adjustment and methods for carrier and timing tracking loops are proposed. The proposed ideas are evaluated and their satisfactory performance are presented through computer simulations.

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Section: Simulation Resultsmentioning

confidence: 99%

Packet Format Design and Decision Directed Tracking Methods for Filter Bank Multicarrier Systems

Amini

Farhang‐Boroujeny

2010

EURASIP J. Adv. Signal Process.

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“…This modification inserts additional delay in the loop which is not accounted for in the standard PLL transfer function. Following the lead of Wilson, Nelson, and Farhang-Boroujeny [3], we presented the appropriately modified transfer function and then demonstrated how the additional roots inserted by the matched filter delays influence the dominant roots of the design process.…”

Section: Discussionmentioning

confidence: 99%

“…We suggest the reader also examine [3] which presents a design procedure that incorporates the effect of the excess delays in the design process.…”

Section: Discussionmentioning

confidence: 99%

“…This difference, (n), is due to manufacturing tolerances, environmental operating conditions, and Doppler offsets between transmitter and receiver platforms. The series resulting from the quadrature down conversion with an offset local oscillator is described in (3) where the baseband sequence is seen to be rotating (or rotated) by the complex exponential exp(j (n)). The PLL's task is to estimate the angular offset and remove it.…”

Section: Introductionmentioning

confidence: 99%

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On the stability of DSP based P-I phase-locked loops containing matched filter delays

Harris

Farhang‐Boroujeny

2011

2011 Conference Record of the Forty Fifth Asilomar Conference on Signals, Systems and Computers (ASILOMAR)

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Phase locked loops (PLL) are designed to align the frequency and the phase of the PLL phase accumulator with the frequency and phase of a complex sampled data input sinusoid. When the PLL is required to align the phase slope and phase of the local DDS with the phase slope and phase of a suppressed carrier modulated input signal the PLL phase detector must be augmented by a non-linear process that forms the underlying carrier. A common process estimates the instantaneous envelope of the modulated waveform and removes the modulation to expose the underlying carrier. Reliable estimates of the modulation are formed with the aid of a matched filter and an auxiliary timing recovery process. The matched filter process occurs inside the PLL loop and contributes additional loop delay. Delay inside a feedback loop is undesirable since it tends to destabilize the loop. We examine the effect of this excess loop delay and present intuitive design constraints that assure loop stability.

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“…We initially considered the delay of the FIR filter when tweaking the coefficients, as in [37], but the demodulator was still plagued by frequent losses of lock and low output SNR. The best results were obtained with the values reported in atpdec's [38] code.…”

Section: Rtl-sdr Library For Simulinkmentioning

confidence: 99%

An Effective Satellite Remote Sensing Tool Combining Hardware and Software Solutions

Gugliuzza

Bruno

Ardizzone

et al. 2019

Communications in Computer and Information Science

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In this paper we propose a new effective remote sensing tool combining hardware and software solutions as an extension of our previous work. In greater detail the tool consists of a low cost receiver subsystem for public weather satellites and a signal and image processing module for several tasks such as signal and image enhancement, image reconstruction and cloud detection. Our solution allows to manage data from satellites effectively with low cost components and portable software solutions. We aim at sampling and processing of the modulated signal entirely in software enabled by Software Defined Radios (SDR) and CPU computational speed overcoming hardware limitation such as high receiver noise and low ADC resolution. Since we want to extend our previous method to demodulate signals coming from various meteorological satellites, we propose a new high frequency receiving system designed to receive and demodulate signals transmitted at 1.7 GHz. The signals coming from satellites are demodulated, synchronized and enhanced by using low level image processing techniques, then cloud detection is performed by using the well known K-means clustering algorithm. The hardware and software architecture extensions make our solution able to receive and demodulate high frequency and bandwidth meteorological satellite signals, such as those transmitted by NOAA POES, NOAA GOES, EU-METSAT Metop, Meteor-M and FengYun. Francesco Gugliuzza and Alessandro Bruno contributed equally to this work. The contribution of Alessandro Bruno falls within the activities of the current project titled "I telescopi Cherenkov per lo sviluppo tecnologico e culturale della Sicilia" at INAF-IASF Palermo, under the scientific supervision of Researcher Dr. Anna Anzalone.

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Parameter Derivation of Type-2 Discrete-Time Phase-Locked Loops Containing Feedback Delays

Cited by 9 publications

References 10 publications

Packet Format Design and Decision Directed Tracking Methods for Filter Bank Multicarrier Systems

Packet Format Design and Decision Directed Tracking Methods for Filter Bank Multicarrier Systems

On the stability of DSP based P-I phase-locked loops containing matched filter delays

An Effective Satellite Remote Sensing Tool Combining Hardware and Software Solutions

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