370,746 research outputs found
On the Design of Oversampled Filter Banks for Channel Coding
No full textOversampled filter banks have been considered for channel coding, because they introduce redundancy into the subband representation of signals and permit more freedom in their design than critically sampled structures. In this paper, based on the knowledge of the channel noise's covariance matrix, we propose a constrained design for the synthesis filter bank in order to minimise the noise power in the decoded signal, subject to admitting perfect reconstruction. For the special case of paraunitary filter banks, a suboptimal iterative design is presented, which highlights the potential benefits of this approach, as demonstrated by a design example
Correspondence relating to a speech by Marriner S. Eccles given to the National Association of Supervisors of State Banks, September 17, 1943
No full textScans of letters to and from Federal Reserve Chairman Marriner S. Eccles in connection with his speech at a meeting of the National Association of Supervisors of State Banks in Cincinnati, September 17, 1943. Includes requests for copies of the speech, thanks for receiving same, and comments on the substance of the speech. Eccles or his staff responded to the latter with further details and sometimes by sending a copy of the speech, as the comments were based on incomplete reports in newspapers
Florea Banks Geochem Model Main.xlsx
No full textContinuous Monitoring data for Sarah Banks Masters thesis 2018. Includes primary data set for continuous monitoring of a karst spring within the Vadu Crisului cave system. For further information please contact author(s)
Fast Implementation of Oversampled Modulated Filter Banks
No full textThis paper presents an efficient implementation of oversampled filter banks derived from a prototype filter by modulation. Via a polyphase analysis, redundancies in the filter operations are removed. With some modifications, a very simple and efficient implementation is found, which is briefly compared to existing realisations
X-efficiency Analysis of Commercial Banks in Pakistan: A Preliminary Investigation
No full textThe emergence of a fast-paced dynamic environment in the business world in general, and in the financial services sector in particular, has highlighted the significance of competition and efficiency. The need for deregulation has become a touchstone of success in fostering both competition and efficiency especially in the economies, which are exposed to structural reforms. In addition to that, intense competition both among domestic and foreign banks, rapid speed of innovations and introduction of new financial instruments, changing consumer’s demands and desire for product augmentation have changed the way a bank conducts business and services its customers. Larger the degree of competition, it is perceived that the firms would become more efficient. However, when the structure of an industry is product of the government regulations, the degree of competition is impaired markedly implying that the efficiency suffers negatively. Banking industry acts as life-blood of modern trade and commerce acting as a bridge to provide a major source of financial intermediation. Thus, appraisal of its efficiency is vital in context of an efficient and competitive financial system. Study of x-efficiency is believed to be important in particular as Berger, et al. (1993) found that x-inefficiencies account for around 20 percent or more of banking costs. Similarly, recent drive among banks towards downsizing, rightsizing and rationalisation of banking costs also implicates for the assessment of x-efficiency analysis of banks. It becomes vital in Pakistani context as there appears to be no study in literature on efficiency or x-efficiency analysis of banks in Pakistan. “A great deal more work is needed on x-efficiency research in banking. Managerial efficiency, the concept of x-efficiency, appears to be a much more important strategic and policy consideration” [Molyneux, et al. (1960), p. 273]. Given
Design of Near Perfect Reconstruction Oversampled Filter Banks for Subband Adaptive Filters
No full textIn this brief, a design algorithm for real-valued and complex-valued oversampled filter banks which yield a low level of inband alias and enable simple subband adaptiv structures is presented. The filter banks are either based on complex modulation of a real-valued low-pass prototype or on the direct or modulated setups of real-valued filter banks. If real-valued filter banks are required, then the different channels will have different subsampling ratios so that the bandpass sampling theorem is not violated. This brief also presents design examples of real-valued and complex-valued filter banks
Has minority foreign investment in China�s banks improved their cost efficiency?
No full textSince 2001, foreign investors have been permitted to acquire minority ownership stakes in China�s banks. This paper assesses whether there is any evidence of a cost efficiency payoff in those banks that have taken on foreign investment. Data Envelopment Analysis is first used to generate measures of cost efficiency for China�s banks over the period 2001-2006. A second stage regression is then performed to determine whether foreign investment has an impact on cost efficiency. The results indicate a positive impact, although one that is only marginally significant. Policy implications are discussed.
Is regulating the solvency of banks counter-productive?
No full textThis paper contains a critique of solvency regulation such as imposed on banks by Basel I and II. It argues that banks seeking to maximize rate of return on risk-adjusted capital (RORAC) aim at an optimal level of solvency because on the one hand, solvency S lowers the cost of refinancing; on the other, it ties costly capital. In period 1, exogenous changes in mean returns dµ and in volatility occur, causing optimal adjustments dS * / dµ and dS * / ds in period 2. Since banks reallocate their assets with certain µ and s values in response to the changed solvency level, an endogenous trade-off with slope dµ / ds results in period 3. Both Basel I and II are shown to modify this slope, inducing at least some banks to opt for a higher value of s in certain situations. Therefore, this type of solvency regulation can prove counter-productive
Cost and profit efficiency of banks in Haiti: do domestic banks perform better than foreign banks?
No full textI use the stochastic frontier methodology to estimate a cost and a profit frontier functions. The Fourier-flexible form is used in this paper because of its flexibility. Results show that, although foreign banks are more cost efficient than domestic banks, domestic banks are more profit efficient than foreign banks, in Haiti. The paper reveals also that, although treasury bills constitute an alternative source of profit for banks in Haiti, a growth of interest rate on treasury bills increases profit efficiency in current period whereas it decreases profit efficiency one period after this growth. The main implication of this paper is that foreign banks are not always more efficient than domestic banks in developing countries, and even in a country with low income level.Cost Efficiency; Profit Efficiency; Foreign Banks; Domestic Banks
- …
