نتایج جستجو برای: to avoid cancellation
تعداد نتایج: 10617973 فیلتر نتایج به سال:
Introduction: Cancellation of an elective operation is a very important problem, which is the cause for different types of stresses for patients and their families and results in loss of significant amount of time, money and hospital resources. Therefore, finding the main causes of operation postponement may help us to understand and reduce these problems. Material & Method: A special question...
The goal of this paper is to introduce the joined LMS and LMF adaptive algorithm (LMFSF) for data echo cancellation. The idea is to use an error estimate as smooth as possible, and after comparison with the selected thresholds to decide whether for the next step we apply LMS or LMF. In order to avoid oscillations from LMS to LMF and back, we use two hysteresis loops. It will be shown through si...
Adaptation control of beamforming interference cancellation techniques is investigated for in-car speech acquisition. Two efficient adaptation control methods are proposed that avoid target cancellation. The “implicit” method varies the step-size continuously, based on the filtered output signal. The “explicit” method decides in a binary manner whether to adapt or not, based on a novel estimate...
In the presence of narrowband interference (NBI), the performance of the direct-sequence code-division multiple access communication system can be improved by using various interference cancellation schemes. In this paper, a scheme of parallel interference cancellers (PICs), which includes a set of NBI cancellation filters and a set of multiple access interference (MAI) cancellation filters, is...
Background: Operation theatre in a hospital requires considerable human and physical resources to deliver surgery services on an agreed schedule. However, operation theatres are sometimes underutilized due to avoidable last minute cancellations of operations. Cancellation of operations on the day of intended surgery results in operation theatre planning difficulties, hospital inefficiency and r...
In this paper, the MIMO full-duplex system is proposed to remove self-interference signal using modified DFT based channel estimation technique. In SISO full-duplex systems only single transceiver can transmit data on either side simultaneously whereas in MIMO full-duplex systems multiple transceivers can transmit data simultaneously from both sides. During MIMO full-duplex transmission self-in...
The so–called affine projection algorithm has become a popular tool in the context of acoustic echo cancellation. Regularisation is an absolute necessity in an affine projection algorithm to avoid near end noise amplification. This paper describes a method to achieve zero overhead regularisation while allowing stable algorithms to be employed to update the inverse covariance matrix that is used...
Background: Operating room efficiency is a major determinant of hospital cost. Maximizing throughput, while maintaining quality, is therefore paramount to maintenance of financial viability. Cancellation of surgery may increase a hospital's cost and affect the efficiency of operating room and waste of resources. This study was conducted to determine the rate and causes of canceled surgeries, an...
We propose a multistage multi-user detector for Code Division Multiple Access that implements Mean-Field Annealing. Annealing is a well known technique to avoid local minima in detection and optimisation problems. Local minima certainly occurs in CDMA multi-user detection leading to anomalous Bit Error Rate curves. Annealing is implemented as a standard multi-user detector implementing interfer...
In this contribution we derive the cost function corresponding to the linear complexity Subtractive Interference Cancellation with tangent hyperbolic tentative decisions. We use the cost function to analyse the fix-points of solving the Subtractive Interference Cancellation equations. The analysis show that we can control the slope of the tangent hyperbolic functions so that the corresponding c...
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