A Simple and Robust Fastica Algorithm Using the Huber M-Estimator Cost Function

2006 ◽  
Author(s):  
Jih-Cheng Chao ◽  
S.C. Douglas
Keyword(s):  
Cost Function ◽  
M Estimator ◽  
Fastica Algorithm

A Research on Complex FastICA Algorithm Based UNB Signal Detection

2011 ◽  
Vol 219-220 ◽  
pp. 1584-1588
Author(s):  
Shi Kai Zhang
Keyword(s):  
Computer Simulation ◽  
Signal Detection ◽  
Cost Function ◽  
Communication Technology ◽  
Modulation Method ◽  
First Principle ◽  
Modulation Format ◽  
High Efficient ◽  
Fastica Algorithm ◽  
Potential Use

Spectrum is limited, in order to develop high efficient modem, Complex FastICA algorithm is studied about its potential use in UNB signal detection. First, principle of Complex FastICA is presented, kurtosis and cost function are analyzed, and realization of Complex FastICA is given; then, M-EBPSK modulation method is supposed as a kind of UNB modulation format, UNB-ICA model for UNB received signal with interference and noise is presented by analyzing the characteristics of M-EBPSK modulation; finally, computer simulation is done by using nosy UNB-ICA model based on Complex FastICA Algorithm, the experimental results show that Complex FastICA Algorithm can suppress the interference and improve detection BER in contrast to the traditional methods, it is hopeful that the method can be used in UNB communication technology.

Estimacion de Economias de Escala en el Mercado de Tarjetas de Pago

2019 ◽  
Vol 12 (2) ◽  
pp. 86-92
Keyword(s):  
Cost Function ◽  
Economies Of Scale ◽  
Payment Methods ◽  
Per Se ◽  
Main Banks ◽  
Debit Cards

During the last years, the growth of transactions made through credit and debit cards has presented quite signif- icant increases both in number and in amounts. This paper studies the existence of economies of scale in the pro- cessing of such transactions, a situation that would exist if it were compatible with the existence of a single firm destined to the processing of said operations. The existence of a single firm for processing is not in itself a problem per se, which does generate problems for the competition is the structure of said firm, because for the period of time analyzed, its shareholder composition was composed of The main banks that issue these cards, but also have given them the function of being the acquirer of the merchants for these payment methods, which generates a vertically inte- grated structure, which creates competition problems in the market. After estimating the model indirectly from a cost function, this work determines the existence of economies of scale in the industry.

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