Results 261 to 270 of about 140,728 (306)
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Carrier recovery for blind equalization
International Conference on Acoustics, Speech, and Signal Processing, 2003Carrier recovery techniques are presented that work with blind equalization of high-order QAM (quadrature amplitude modulation) signal constellations, specifically, the square uncoded 64-QAM and CCITT V.33 cross-trellis-coded 128-QAM constellations. The techniques were confirmed by laboratory experiments using a WE-DSP32-based real-time digital signal ...
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Minimum entropy approach for carrier frequency recovery
IEEE Transactions on Wireless Communications, 2006This paper introduces a new carrier frequency recovery approach. It can be applied before modulation classification and/or demodulation of the M-ary PSK signals. It relies on the entropy of the instantaneous phase probability density function, and uses the fact that it reaches minimum when the receiver is fine-tuned to the unknown carrier frequency ...
Maciej Pedzisz, Arnaud Coatanhay
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Clock and carrier recovery for coherent receivers
2015 European Conference on Optical Communication (ECOC), 2015Clock and carrier recovery architectures and alternatives are given with the aim to address some known issues in the design of coherent receivers.
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Carrier recovery using FFT and Kalman filter
3rd International Symposium on Image and Signal Processing and Analysis, 2003. ISPA 2003. Proceedings of the, 2004The challenge of carrier recovery for digitally phase modulated, suppressed-carrier signals has been the target of much attention in mobile radio system design for many years. In this paper, a new open-loop all-digital carrier recovery method for multiple phase shift keying (MPSK) which is based on random data modulation is presented.
Xu Yang +3 more
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Carrier phase and frequency recovery for MIMO-OFDM
IEEE Global Telecommunications Conference, 2004. GLOBECOM '04., 2005A new carrier phase and frequency recovery scheme is proposed for multiple-input multiple-output (MIMO) orthogonal frequency division multiplexing (OFDM) systems. The algorithm uses an extended Kalman filter (EKF) to estimate the instantaneous phase and frequency offset.
Hui Jin +3 more
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Carrier Recovery Techniques using Synchronous Oscillators
MILCOM 1986 - IEEE Military Communications Conference: Communications-Computers: Teamed for the 90's, 1986A Synchronous Oscillator (SO) is a synchronization and tracking network which synchronizes, tracks, filters, amplifies and divides (if necessary) in a single process. It has very good noise rejection properties while maintaining wide tracking range. It acquires very fast in burst mode operation.
Vasil Uzunoglu, Marvin H. White
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Synchronization: Carrier and Timing Recovery
1992The theme of this chapter might well be “…timing is everything.” In the course of our discussion in Chapter 4, we saw that the detection of a baseband digital data sequence presumed proper timing at the receiver. (See Section 4.10, particularly.) The same requirement for timing is present in the detection of passband signals; however, as we saw in ...
Richard D. Gitlin +2 more
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Pilot-Aided Carrier Recovery in the Presence of Phase Noise
IEEE Transactions on Communications, 2011The paper deals with carrier recovery based on pilot symbols in single-carrier systems. The system model considered in the paper includes the channel additive white noise and the phase noise that affects the local oscillators used for up/down-conversion.
SPALVIERI, ARNALDO, BARLETTA, LUCA
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A Fine Carrier Phase Recovery Method for 32APSK
2018When 32-ary amplitude phase shift keying (32APSK) modulation is used in the communication system, carrier recovery is one of the most important technology. The decision-directed (DD) phase locked loop (PLL) is widely used for carrier recovery. Based on the decision-directed (DD) phase locked loop (PLL) algorithm, the paper proposes a new fine carrier ...
Yulei Nie, Zijian Zhang 0001, Peipei Liu
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Carrier phase recovery for turbo-coded linear modulations
2002 IEEE International Conference on Communications. Conference Proceedings. ICC 2002 (Cat. No.02CH37333), 2003In this paper, we present a low-complexity carrier phase estimation algorithm suited for turbo-coded 16-QAM modems. The estimator is based on a maximum likelihood (ML) approach, and unlike previously published work, makes iterative use of soft decisions provided by the soft-in soft-out decoders within the overall iterative turbo decoding scheme ...
LOTTICI, VINCENZO, LUISE, MARCO
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