Results 151 to 160 of about 3,508 (187)

Estimation of multipath channel response in frequency selective channels

IEEE Journal on Selected Areas in Communications, 1989
A novel discrete-time method is proposed for estimating the impulse response of a frequency-selective digitally modulated communication channel. The received signal is first demodulated and sampled and then the fourth-order cumulants of the resulting discrete-time sequence are estimated.
Dimitrios Hatzinakos, Chrysostomos L. Nikias   +1 more
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Mutual Information of Multipath Channels with Imperfect Channel Information

IEEE Transactions on Communications, 2009
Analysis of mutual information is important to wireless transmission over fading channels, and is usually done by assuming perfect channel state information (CSI) available at the receiver. In many practical applications, however, the CSI must be estimated by sending a limited number of pilot symbols and thus, can suffer from considerable inaccuracy ...
Song, S.H., Zhang, Q.T.
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More on the Multipath Fading Channel Model

IEEE Transactions on Communications, 1981
Selective fading due to muitipath on a typical narrowband line-of-sight microwave radio path is represented with a simplified three-ray model. This model provides a satisfactory description of the frequency transfer characteristics of almost all fades observed during three separate propagation experiments. Data were obtained for a 30 MHz bandwidth at 6
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Non-causal filters in multipath channel shaping

1993 IEEE International Symposium on Circuits and Systems, 2002
The use of the Viterbi algorithm in its simplified versions for detection of a data sequence is more effective in the case of minimum phase channels. A method is proposed for equalization of nonminimum phase channels. It employs noncausal allpass filters operating in reversed time.
Eduardo Abreu, Sanjit K. Mitra, Rossano Marchesani   +2 more
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Reliable Satellite Communications for a Specular Multipath Channel

IEEE Transactions on Communications, 1978
In many mobile satellite communication systems specular multipath exists and acts as a distortion to the transmitted message stream. In most cases there is a singular specular return which can be characterized by a delay and reflection coefficient. If this return is viewed as intersymbol interference on the channel, then it is possible to consider the ...
Kenneth S. Schneider, Terrence P. McGarty   +1 more
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Simulation and modelling of multipath mobile channels

Proceedings of IEEE Vehicular Technology Conference (VTC), 2002
The random time-varying filter theory is reviewed and the conditions of canonical channel models are examined. These are linked to a discrete time baseband simulation using fractional sampling period delay technique and frequency domain filtering for the generation of the coloured complex Gaussian sequences.
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A Communication Technique for Multipath Channels

Proceedings of the IRE, 1958
Application of principles of statistical communication theory has led to a new communication system, called Rake, designed expressly to work against the combination of random multipath and additive noise disturbances. By coding the Mark-Space sequence of symbols to be transmitted into a wide-band signal, it becomes possible at the receiver to isolate ...
R. Price, P. Green
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A DCSK in multipath fading channels

2013 International Conference on Communications, Circuits and Systems (ICCCAS), 2013
Performance of Differential Chaos Shift Keying (DCSK) with digital signal processing for wireless communication is analyzed, which generalized application of DCSK into L-path Nakagami fading channels, figure illustration shows that Bit Error Rate (BER) of DCSK decreases as chaotic spreading factor or Signal-to-Noise Ration of power (SNR) increases.
Chunfu Li, Min Wei, Guangjun Wen
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On Subspace Channel Estimation in Multipath SIMO and MIMO Channels

2004
Earlier studies showed that iterative processing at receiver may significantly improve performance in wireless communications. In particular, performance of space-time block codes (STBC) extended for frequency selective channels may be notably improved by iterative channel estimation (ICE).
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On frequency selective multipath channels

1999 IEEE International Conference on Communications (Cat. No. 99CH36311), 2003
The energy detection of continuous phase frequency shift keying (CP-FSK) signals is the optimum noncoherent detection technique yielding a minimum bit error rate (BER) on the additive white Gaussian noise (AWGN) channel. This scheme is usually used when carrier phase estimation is difficult.
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