Results 281 to 290 of about 856,367 (318)
Some of the next articles are maybe not open access.
IEEE Communications Surveys & Tutorials, 2014
Orthogonal frequency division multiplexing (OFDM) has been widely adopted in modern wireless communication systems due to its robustness against the frequency selectivity of wireless channels. For coherent detection, channel estimation is essential for receiver design.
Leonard J. Cimini +4 more
openaire +2 more sources
Orthogonal frequency division multiplexing (OFDM) has been widely adopted in modern wireless communication systems due to its robustness against the frequency selectivity of wireless channels. For coherent detection, channel estimation is essential for receiver design.
Leonard J. Cimini +4 more
openaire +2 more sources
2014 International SoC Design Conference (ISOCC), 2014
This paper proposes a fast channel estimation (CE) scheme for the OFDM based IEEE 802.11ad wireless local area network (WLAN). The LTF (LTF) -based CE provides better BER (bit error rate) performance at slow fading channel, whereas the pilot-based CE approach is good at fast fading channel.
Kyuhoon Lee +3 more
openaire +2 more sources
This paper proposes a fast channel estimation (CE) scheme for the OFDM based IEEE 802.11ad wireless local area network (WLAN). The LTF (LTF) -based CE provides better BER (bit error rate) performance at slow fading channel, whereas the pilot-based CE approach is good at fast fading channel.
Kyuhoon Lee +3 more
openaire +2 more sources
Diversity with practical channel estimation
IEEE Transactions on Wireless Communications, 2005In this paper, we present a framework for evaluating the bit error probability of N/sub d/-branch diversity combining in the presence of non-ideal channel estimates. The estimator structure presented is based on the maximum-likelihood (ML) estimate and arises naturally as the sample mean of N/sub p/ pilot symbols.
Gifford W. M., Win M. Z., CHIANI, MARCO
openaire +3 more sources
On estimation for a binary-symmetric channel
IEEE Transactions on Information Theory, 1998Summary: We consider a binary-symmetric channel where the input, modeled as an infinite sequence of bits, is distorted by a Bernoulli noise. In [\textit{G. Simons}, Estimating distortion in a binary symmetric channel consistently, ibid. 37, 1466-1470 (1991)], a consistent estimator of the distortion, i.e., of the probability that a single bit is ...
Krzysztof Podgórski +2 more
openaire +3 more sources
Open‐channel estimation of denitrification
Limnology and Oceanography: Methods, 2003Estimates of denitrification based on standard methods often cannot easily be extrapolated to entire ecosystems because of high spatial heterogeneity in rates of denitrification. Diel changes in the concentration of dinitrogen (N2) in running waters provide the basis for estimating denitrification by an open‐channel technique in much the same way that ...
James H. McCutchan +3 more
openaire +2 more sources
Simple estimators for HF channel estimation
Fourth IEEE Region 10 International Conference TENCON, 2003A comparison is made of four different estimators, for estimating the sampled impulse-response (SIR) of an HF radio link that is designed for the transmission of analog speech signals. The particular application studied is the transmission of digital data at 4800 bit/s, employing a serial quadrature phase shift keyed (QPSK) signal with a carrier ...
A.P. Clark, S. Hariharan
openaire +2 more sources
Background on Channel Estimation
2014In this chapter, we introduce popular channel estimation approaches in the conventional point-to-point MIMO system, including the maximum likelihood (ML) estimation and minimum mean square error (MMSE) estimation, as well as their counterparts least square (LS) estimation and linear minimum mean square error (LMMSE) estimation.
Chengwen Xing, Feifei Gao, Gongpu Wang
openaire +2 more sources
Modified UWB channel estimation
2005 2nd Asia Pacific Conference on Mobile Technology, Applications and Systems, 2005Ultra wideband (UWB) wireless communication is a new type of radio communication. One of the main applications of UWB in the future focuses on wireless personal area networks (WPAN). Channel estimation is very important for OFDM based UWB system because of its coherent demodulation.
Bing Leng +3 more
openaire +2 more sources
2019
In this chapter, we investigate the design of training sequences for time-multiplexed channel training in C-RANs. Orthogonal training sequences were shown to be optimal or nearly optimal in conventional MIMO systems, where the transmit antennas are co-located, and so are the receive antennas. However, orthogonal training design is very inefficient when
Xiaojun Yuan +2 more
openaire +2 more sources
In this chapter, we investigate the design of training sequences for time-multiplexed channel training in C-RANs. Orthogonal training sequences were shown to be optimal or nearly optimal in conventional MIMO systems, where the transmit antennas are co-located, and so are the receive antennas. However, orthogonal training design is very inefficient when
Xiaojun Yuan +2 more
openaire +2 more sources
Iterative decoding and channel estimation
2000 IEEE International Symposium on Information Theory (Cat. No.00CH37060), 2002We investigate iterative decoding and channel estimation for multiple-access channels. Results are obtained concerning the fixed points of such iterations.
Alex Grant, Paul Dean Alexander
openaire +3 more sources