Results 201 to 210 of about 4,754,953 (231)

Optimized delay diversity for frequency-selective fading channels

IEEE Transactions on Wireless Communications, 2005
This paper proposes an optimized delay diversity (ODD) scheme for frequency-selective fading channels. The novel scheme requires knowledge of the channel impulse response (CIR) autocorrelation matrix at the transmitter, but the CIRs themselves have to be available only at the receiver side.
Thorsten Hehn, Robert Schober, Wolfgang H. Gerstacker   +2 more
openaire   +1 more source

Transmission over frequency-selective fading

2017
The wireless channel introduces frequency-selective fading to the transmitted signal when the channel coherence bandwidth Bc is smaller than transmitted signal bandwidth Bs. In this chapter, we discuss the challenges and candidate solutions for digital wireless transmission over frequency-selective fading channels.
openaire   +1 more source

Error performance of multicarrier CDMA in frequency-selective fading

GLOBECOM '05. IEEE Global Telecommunications Conference, 2005., 2005
This paper extends a previous work on direct-sequence code-division multiple access (DS-CDMA) to multicarrier (MC) CDMA systems. New results on the error performance of a family of multiuser detectors for MC-CDMA are obtained using the replica method, which was originally developed in statistical physics. The central result is the "decoupling principle"
openaire   +2 more sources

The fading machine, and its use for the investigation of the effects of frequency-selective fading

Journal of the Institution of Electrical Engineers - Part IIIA: Radiocommunication, 1947
The function of the fading machine is to simulate the frequency-selective fading which is characteristic of long-distance short-wave radio channels. Fading of this type is usually due to interference between waves which have traversed multiple paths between sender and receiver, and its effect is often to produce distortion of the modulation of radio ...
W.J. Bray, H.G. Lillicrap, F.C. Owen
openaire   +1 more source

An adaptive receiver for frequency selective fading channels

IEEE International Conference on Communications, - Spanning the Universe., 2003
Adaptive reception of binary data over a frequency selective slow Rayleigh fading communication channel, through wideband signaling, using spectral spreading codes is considered. Based on the likelihood ratio test, an estimator correlator receiver structure is developed.
C. Sandeep, S.C. Gupta
openaire   +1 more source

Invariant method for controlling frequency selective fading

2012 IEEE 11th International Conference on Actual Problems of Electronics Instrument Engineering (APEIE), 2012
Analysis of qualitative parameters of invariant system for the case of non-correlated noise sampling and presence of frequency selective fading is made. Probability for pair transfer of invariants is calculated. Structure of invariant system is proposed.
E. I. Algazin, A. V. Sapsalev, V. B. Malinkin, A. V. Malinkin   +3 more
openaire   +1 more source

Implementation of a Digital Frequency Selective Fading Simulator

1997
In a mobile radio environment, the received signal is made up of a number of scattered waves caused by reflection and diffraction of the transmitted signal by surrounding objects. The resultant scattered waves cause the well-known multipath fading phenomenon, such that the envelope, phase and frequency components of the received signal vary randomly ...
XiaoFang Chen, KahSeng Chung
openaire   +1 more source

Distributed Strain Sensing by Frequency-Selective Fading in Phase-OTDR

CLEO 2024
We demonstrate a novel approach using frequency-selective fading in phase-OTDR systems to measure dynamic strain on a fiber optic cable. We present the measurements of 200 Hz, 0.03 με strain at 2 kHz interrogation frequency.
Yildiz, M.K., Uyar, F., Kartaloglu, T., Ozbay, E., Özdür, İbrahim Tuna   +4 more
openaire   +4 more sources

An Adaptive Channel Estimator for Frequency-Selective Fading Channels

1990
A channel estimator for extracting the discrete-time channel coefficients (“tap-gains”) of a time-varying frequency-selective channel is investigated. A Kalman filter is integrated into a least mean squares (LMS) estimator such that a-priori knowledge about the statistics of the channel is taken into account. Assuming a state-space model of the channel
openaire   +1 more source

A Digital Frequency-Selective Fading Simulator

Frequenz, 1989
Hans Wilhelm Schüßler, Jörn Thielecke, Klaus Preuss, Wolfgang Edler, Max Gerken   +4 more
openaire   +1 more source