Reply: Merit factor of Chu and Frank sequences

1991 ◽  
Vol 27 (9) ◽  
pp. 777 ◽  
Author(s):  
M. Antweiler ◽  
L. Bömer
Keyword(s):  
Merit Factor

High Q merit factor, low frequency acoustic resonant modes from a Pt{100} single crystal

1996 ◽  
Vol 69 (24) ◽  
pp. 3677-3679 ◽  
Author(s):  
T. Mitrelias ◽  
S. Kelling ◽  
M. Gruyters ◽  
D. A. King
Keyword(s):  
Single Crystal ◽  
Low Frequency ◽  
High Q ◽  
Merit Factor ◽  
Resonant Modes

Comment: Merit factor of Chu and Frank sequences

1991 ◽  
Vol 27 (9) ◽  
pp. 776 ◽  
Author(s):  
B.M. Popović
Keyword(s):  
Merit Factor

Merit factor analysis of polyphaser sequences using cyclic algorithm new with good correlation properties

2018 ◽  
Vol 7 (3.29) ◽  
pp. 203
Author(s):  
Rajasekhar Manda ◽  
Dr P. Rajesh Kumar
Keyword(s):  
Factor Analysis ◽  
Correlation Function ◽  
Channel Estimation ◽  
Frequency Domain ◽  
Performance Parameter ◽  
Sidelobe Level ◽  
Merit Factor ◽  
Cyclic Algorithm ◽  
Correlation Properties

Polyphase sequences such as Pn (n=1, 2, 3, 4, x), Golomb, Frank, and the Chu are with good correlation properties, lower sidelobe levels and large merit factor values are helpful in applications like radar, sonar and channel estimation and communications. The goodness of a sequence obtained from merit factor. The transmitted and received signal may not be the same due to noise. The correlation function of given sequence is expressed by ISL (Integrated Sidelobe Level) by minimizing the ISL metrics the performance parameter merit factor is improved. To make this possible the ISL metric is expressed in the frequency domain and minimized to its most recent values and fixing at their most recent value until the predefined threshold satisfied. Because of FFT operations, the Cyclic Algorithm New applied to very long length sequences say N~106. In this paper, the Merit factor and correlation levels compared with standard, and cyclic algorithm new initialized with Polyphase sequences for lengths 102~104. Moreover, the observations made for four consecutive even and odd integer lengths say 162, 172, 182, and 192. CAN (P3, Golomb) exhibits merit factor improvement of 3.77%. These sequences of sidelobe levels reduced.  

scholarly journals Structural, electronic and thermoelectric properties of the intermetallic materials based on Mg2X (X= Si, Ge, Sn): DFT calculations

2017 ◽  
Vol 2 (2) ◽  
pp. 25
Author(s):  
Miloud Ibrir
Keyword(s):  
Thermoelectric Properties ◽  
Density Functional ◽  
Local Density ◽  
Electronic Conductivity ◽  
Full Potential ◽  
Plane Wave Method ◽  
Intermetallic Materials ◽  
Merit Factor ◽  
Densities Of States ◽  
Linearized Augmented Plane Wave

The scope of this work is the investigation of the physical properties of chalcopyrite materials using ab-initio methods in order to simulate a new structure of thin-films photovoltaic cells with high conversion efficiency. In the first framework, we obtained the results of calculations based on Density Functional Theory (DFT) using the full-potential linearized augmented plane wave method (FP-LAPW) as involved in the WIEN2K computational package. For the exchange-correlation potential, the local density approximation (LDA) was used to calculate the lattice parameters, Bulk modulus and its first derivative as well as the densities of states of the intermetallic semiconductors materials based on Mg2X (X=Si, Ge and Sn). The semi-local Becke-Johnson (mBJ) potential and its modified form proposed by Tran and Blaha (TB-mBJ) were also used for studying the electronic and thermoelectric properties; (merit factor, Seebeck coefficient, electronic conductivity). The achieved results were compared to computational works and other data acquired experimentally.

scholarly journals The merit factor of binary arrays derived from the quadratic character

2011 ◽  
Vol 5 (4) ◽  
pp. 589-607 ◽  
Author(s):  
Kai-Uwe Schmidt
Keyword(s):  
Quadratic Character ◽  
Merit Factor

The merit factor of binary sequence families constructed from 𝑚-sequences

2010 ◽  
pp. 265-278 ◽  
Author(s):  
Jonathan Jedwab ◽  
Kai-Uwe Schmidt
Keyword(s):  
Binary Sequence ◽  
Merit Factor

The study of structural, electronic and thermoelectric properties of Ca1−xYbxZn2Sb2 (x = 0, 0.25, 0.5, 0.75, 1) Zintl compounds

2021 ◽  
pp. 2150100
Author(s):  
I. Mili ◽  
H. Latelli ◽  
T. Ghellab ◽  
Z. Charifi ◽  
H. Baaziz ◽  
...  
Keyword(s):  
Thermal Conductivity ◽  
Seebeck Coefficient ◽  
Carrier Concentration ◽  
Figure Of Merit ◽  
Narrow Gap ◽  
High Carrier Concentration ◽  
Merit Factor ◽  
Composition Formula ◽  
High Seebeck Coefficient ◽  
High Carrier

Based on the electronic structure, the physical properties of [Formula: see text] ([Formula: see text], 0.25, 0.5, 0.75, 1) Zintl compounds are studied. The transport properties can be significantly changed by varying the composition [Formula: see text]. The materials under study are more metallic with increasing [Formula: see text] and behaves like a semiconductor when [Formula: see text] decreases. It is found that [Formula: see text] exhibits a larger thermopower magnitude ([Formula: see text] at [Formula: see text] and the Seebeck coefficient decreases as [Formula: see text] increases. The calculated figure of merit factor of [Formula: see text] is found to be low, this is explained by the fact that its structure is very compact and its bandgap is small which lead to high electrical and thermal conductivity due to high carrier concentration ([Formula: see text] at [Formula: see text]). On other hand a narrow-gap (0.46 eV for [Formula: see text]), provides a balance between a high Seebeck coefficient and low electronic thermal conductivity, with a slight increase in the carrier concentration when the temperature increases ([Formula: see text] at 600 K). As a consequence, [Formula: see text] compound is predicted to have good performance for thermoelectric applications. The electrical [Formula: see text] and the thermal [Formula: see text] conductivity for [Formula: see text] compound in both directions (along [Formula: see text] and [Formula: see text]-axes) are calculated. It is obtained that [Formula: see text] is 120% of [Formula: see text] at high-temperature, whereas [Formula: see text] Seebeck coefficient was higher than [Formula: see text] especially at [Formula: see text] ([Formula: see text]. The large value of [Formula: see text] showed that the transport is dominated by zz-axis.

The merit factor of Legendre sequences (Corresp.)

1983 ◽  
Vol 29 (6) ◽  
pp. 934-936 ◽  
Author(s):  
M. Golay
Keyword(s):  
Merit Factor
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