Results 261 to 270 of about 404,297 (306)
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Carrier phase jitter sensitivity for single-carrier and multi-carrier QAM systems
IEEE Second Symposium on Communications and Vehicular Technology in the Benelux, 2002Investigates how the carrier phase jitter of a phase-locked oscillator for IF-to-baseband conversion affects the performance of single-carrier QAM (SC-QAM) and multi-carrier QAM (MC-QAM). This phase jitter reduces the signal-to-noise ratio (SNR) at the input of the decision device, and therefore gives rise to an increase of the bit error rate.
T. Pollet +3 more
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Multiplier-free Carrier Phase Estimation for Low Complexity Carrier Frequency and Phase Recovery
National Fiber Optic Engineers Conference, 2012Carrier phase estimation for QPSK modulation is demonstrated using only real-valued additions without any multiplication or angle computation. Based on simulation and offline data, the same performance as the widely considered 4th-power algorithm is reached.
J. Qi, F. N. Hauske
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Carrier Wave Phase Synchronizers
2009 Fourth International Conference on Digital Telecommunications, 2009This work study four carrier wave phase synchronizers (CWPS) or carrier wave Phase Lock Loop (CWPLL).The VCO (Voltage Controlled Oscillator) output of the phase synchronizer synchronizes directly with the input carrier wave.We consider four carrier synchronizers namely the analog, hybrid, combinational and sequential.
António D. Reis +3 more
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Multiple-phase codes for detection without carrier phase reference
IEEE Transactions on Information Theory, 1998Summary: The authors consider the construction and analysis of linear block codes for \(M\)-ary phase-shift keying that can be decoded without carrier phase synchronization. Under these circumstances, the function that has a significant impact on performance is the noncoherent distance, analogously to the Euclidean distance for the coherent case.
Feng-Wen Sun, Harry Leib
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Efficient estimation of continuous phase modulation with unknown carrier phase
IEEE Transactions on Communications, 1997Summary: An efficient algorithm is presented for the estimation of continuous phase modulation (CPM) sequences over the Gaussian channel with unknown carrier phase. It operates on the excess phase trellis like Viterbi algorithm, except that it is not an maximum-likelihood (ML) estimator. Its decision metric for survivor selection at each node is chosen
Yew Kong Some, Pooi Yuen Kam
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Carrier Phase and Clock Recovery for Continuous Phase Modulated Signals
IEEE Transactions on Communications, 1987This paper presents an analysis of a synchronization circuit to be used for carrier-phase and symbol-timing recovery in continuous phase modulation systems. M -ary modulation formats with arbitrary pulse shaping and rational modulation indexes are assumed. Circuit performance is expressed in terms of variances of phase and timing errors.
D'ANDREA, NUNZIO ALDO +2 more
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Carrier-Envelope Phase Stabilization
2013After introducing some fundamental concepts and definitions for carrier-envelope stabilization schemes and frequency combs, measurement schemes for the carrier-envelope phase of oscillators and amplified systems are discussed. In particular, care is taken to point out typical problems in the experimental implementation of such schemes and to indicate ...
Günter Steinmeyer +2 more
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2003
Processing of GLONASS carrier phase observations differs from that of GPS. These differences are briefly reviewed. Presently GLONASS does not contain selective availability (SA). Simply graphing between-satellite differences reveals parts of SA that is implemented on GPS satellite signals.
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Processing of GLONASS carrier phase observations differs from that of GPS. These differences are briefly reviewed. Presently GLONASS does not contain selective availability (SA). Simply graphing between-satellite differences reveals parts of SA that is implemented on GPS satellite signals.
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Determining Phase-Energy Coupling Coefficient in Carrier-envelope Phase Measurements
2007 Conference on Lasers and Electro-Optics (CLEO), 2007For f-to-2f interferometers based on white-light generation in sapphire plates, the accuracy of the carrier-envelope (CE) phase measurement and stabilization is affected by the laser energy fluctuation. The coupling coefficient between the CE phase and the laser energy has been determined by modulating the pulse energy in an in-loop f-to-2f ...
Chengquan, Li +6 more
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Soft carrier phase recovery for continuous phase modulations
2010 European Wireless Conference (EW), 2010In this paper a general soft-based synchronization technique for continuous phase modulations (CPM) is presented. In particular two soft carrier phase estimation algorithms are derived, being the phase the parameter that shows the lower implementation complexity.
Marilena Maiolo +2 more
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