flat fading


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flat fading

[¦flat ′fād·iŋ]
(communications)
Type of fading in which all components of the received radio signal fluctuate in the same proportion simultaneously.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
References in periodicals archive ?
Section III presents proposed features ( ) which are extracted from received signal under the effect of noise (AWGN) and considered channel model (Rayleigh Flat Fading Rician Flat Fading).
To determine the probability of error in the proposed code-time diversity system in frequency selective channel, the same procedure as that used in flat fading channel case is followed.
where the subscript ff denotes the flat fading and p(a) is the probability density function of Rayleigh distribution.
Flat fading refers to eases where the latest copy of the signal arrives at the base station after a time duration that is smaller than the symbol bit period.
Communication environment consists of QAM signals transmitted through a flat fading Rayleigh environment.
The bandwidth used in the DRM+ system, approximately 100KHz, is much smaller than the coherence bandwidth of the channels in typical urban environment that is in the order of 1MHz [4], which results in a severe flat fading condition.
In simulation, the channel is assumed to be quasi-static flat fading. Gray code is employed to map the data bits to MQAM constellations.
The link between PU-Rx and CU-Tx is supposed to be a flat fading channel with instantaneous channel gain [g.sub.k,n], the channel between CU-Rx and CU-Tx is also a flat fading channel characterized by instantaneous channel gain [h.sub.k,n].
For a BER of [10.sup.-4] and the mobility of 3 km/h, simulation results show that a gain of 6 dB is achieved by the proposed scheme over both flat fading and Pedestrian A (Ped A) channels, compared to the conventional CDD-OFDM system.