Results 151 to 160 of about 418 (202)
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Applying frequency domain equalization to precoded CPM
2008 IEEE International Conference on Acoustics, Speech and Signal Processing, 2008We show how to apply frequency domain equalization (FDE) to precoded continuous phase modulation (CPM) systems. It is well known that differential precoding can be applied to the specific, popular class of CPM schemes with modulation index h = 1/2Q, where Q is any integer.
Wim Van Thillo +5 more
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Frequency-Domain Equalization Incorporated with Frequency-Domain Redundancy for OFDM Systems
2006 IEEE 17th International Symposium on Personal, Indoor and Mobile Radio Communications, 2006This paper proposes a frequency-domain equalizer (FEQ) which utilizes not only guard interval but also redundancy in the frequency domain to eliminate inter-symbol and inter-carrier interferences. The proposed FEQ employs the hybrid criterion, i.e., the zero-forcing (ZF) criterion for compensating desired subcarriers and the minimum mean square error ...
Akihiro Okazaki +5 more
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A Frequency-Domain Neural Network Equalizer for OFDM
GLOBECOM '03. IEEE Global Telecommunications Conference (IEEE Cat. No.03CH37489), 2004OFDM is regarded as a viable solution to combat the impact of frequency selective fading; however, the channel does not have flat amplitude over the entire bandwidth, thus channel equalization is still required at the receiver. Radial basis function (RBF) neural networks have been widely considered for channel equalization, since they offer certain ...
Charalabopoulos, G +2 more
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Performance evaluation of time and frequency domain equalizers
2014 IEEE 27th Canadian Conference on Electrical and Computer Engineering (CCECE), 2014This paper presents performance evaluation of two implementations of an equalizer: a time domain equalizer (TDE) based on the Least Mean Squares (LMS) algorithm and a frequency domain equalizer (FDE) based on the Fast LMS algorithm. The comparison between the two algorithms is based on the computational complexity and resources.
Anis Souari +3 more
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Frequency Domain Blind Equalization for MIMO Systems
2005 IEEE 16th International Symposium on Personal, Indoor and Mobile Radio Communications, 2006This paper presents a new normalized frequency domain approach for adaptive blind equalization for multiple-input multiple-output (MIMO) communication systems. We first develop a time domain block based algorithm that updates the equalizer coefficients once per block of data symbols.
Hai Huyen Dam +2 more
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Iterative Frequency-Domain Decision-Feedback Equalization
2006 3rd International Symposium on Wireless Communication Systems, 2006Single-carrier transmission with frequency-domain equalization (SCT/FDE) is today recognized as an attractive alternative to orthogonal frequency-division multiplexing (OFDM) for wireless applications with large channel dispersions. In this paper, we investigate iterative frequency-domain decision- feedback equalization (FD/DFE), which significantly ...
Frederique Sainte-Agathe, Hikmet Sari
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Linear time and frequency domain turbo equalization
IEEE VTS 53rd Vehicular Technology Conference, Spring 2001. Proceedings (Cat. No.01CH37202), 2002For coded data transmission over channels introducing inter-symbol interference, one approach for joint equalization and decoding in the receiver is turbo equalization. We rederive existing linear equalization algorithms applicable to turbo equalization for 2/sup m/-ary signal alphabets and compare their computational complexity. Moreover by evaluating
Michael Tüchler, Joachim Hagenauer
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Automatic equalization using the discrete frequency domain
IEEE Transactions on Information Theory, 1973A new mean-square-error automatic equalizer for synchronous data transmission is developed. It utilizes Rosen's gradient-projection method to optimize parameters in the discrete frequency domain. The algorithm converges (in the mean) for any channel even in the presence of noise. It is shown that for the channels considered, convergence is faster (in a
Terry Walzman, Mischa Schwartz
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Multiple Position Room Response Equalization in Frequency Domain
IEEE Transactions on Audio, Speech, and Language Processing, 2012This paper deals with methods for multiple position room response equalization. Differently from a well-known technique working in the time domain and based on fuzzy -means clustering, in the proposed approach most of the operations are performed in the frequency domain and, in particular, the fuzzy -means clustering is applied to the room magnitude ...
Alberto Carini +4 more
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Self-Orthogonalizing Adaptive Equalization in the Discrete Frequency Domain
IEEE Transactions on Communications, 1984A self-orthogonalizing discrete adaptive equalizer for synchronous data transmission is presented, based on the overlapsave filtering technique. Self-orthogonalization in the discrete frequency domain is adaptively performed by premultiplying by a diagonal matrix the MSE gradient estimates before projecting by means of Rosen's gradient projection ...
PICCHI, Giorgio, PRATI, Giancarlo
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