نتایج جستجو برای: frequency and spatial domain
تعداد نتایج: 16961384 فیلتر نتایج به سال:
In this letter, we introduce frequency-domain spacetime transmit diversity (STTD) encoding/decoding to orthogonal frequency division multiplexing combined with time division multiplexing (OFDM/TDM) on a frame-by-frame basis (i.e., over several concatenated OFDM signals in the frequency-domain) to achieve both spatial and frequency diversity gains and improve the bit error rate (BER) performance...
A spatial domain and frequency domain integrated approach was proposed to fusion multifocus images. The proposed multifocus image fusion algorithm was composed of computing Sum-modified-Laplacian(SML) for each focus image, stationary wavelet transform(SWT) decomposition, image fusion and inverse SWT. Firstly, two initial binary decision maps were created by setting two thresholds to the SML dif...
abstract the current study sets out 1) to investigate the strategic needs of iranian efl learners in reading literary and non-literary texts; 2) to shed some light on the differences between reading literary and non-literary texts; and 3) to specify the differences in the interaction of participants with texts while reading two literary subgenres ( i.e., short story and literary essays). to ...
Introduction: The present study was carried out to compare contrast sensitivity among three groups of professional welders including (1) those who use gas metal Arc welding (GMAW) (2) those who use shield metal Arc welding (SMAW) and the group that uses resistance welding. . Material and Method: In this research, all the welders who use GMAW, SMAW and resistance welding working in an industry...
The frequency-dependent characteristics of microstrip planar circuits have been previously analyzed using several full-wave approaches. All those methods directly give characteristic of the circuits frequency by frequency. Computation time becomes important if these planar circuits have to be studied over a very large bandwidth. The transmission line matrix (TLM) method presented in this paper ...
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