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Air turbulence forecasting of airbus type A320 in southeast asia using deep learning method
(2020-11-04)
Laon, Popphon
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Phasukkit, Pattarapong
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Pradabpet, Chusit
This paper is present the Air Turbulence Forecasting of Airbus type A320 in Southeast Asia using the Deep Learning Method. It will collect flight data of aircraft in the region of Southeast Asia (Thailand and Vietnam). In which data was collected for 40 flights to forecast the occurrence of air turbulence in 3 status consist of non-turbulence, the rapid decrease and increase the altitude is out of pilot control. In this research using deep learning with supervise learning and create the mathematical model for air turbulence forecasting which could help to reduce the wastage that may affect to the passenger. The results, using 5 layers of deep learning (1 input layer, 3 hidden layers, and 1 output layer). The most suitable model consists of 9 features such as vertical speed, calibrated altitude, wind speed, wind direction (wind angle), temperature, latitude, longitude, true airspeed, and indicated airspeed. The output layer consists of 3 classes (class1=non-turbulence, class2=increase altitude, and class3=decrease altitude) and optimization the weight with gradient descent. The epoch number is 1500 and the learning rate is 0.1, which will get accuracy 88% for the train set and 86 % for the test set.
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Vertical speed prediction for the efficient landing of aircraft using GRU
(2020-11-04)
Pavitpok, Siwagorn
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Phasukkit, Pattarapong
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Pradabpet, Chusit
Air traffic management is currently the process of managing air traffic demand. For support the capacity to handle the amount of air traffic. Whether it is in the airspace sector or the airport area. There are many factors such as the ability of the air traffic providers, physical characteristics of airspace and airport terrain. The main goal of air traffic management is to manage air traffic control. Streamlined and demand-capacity balancing are safe and effective. Whether it is air traffic service providers or passengers. In this research, the experiment was carried out on specific aircraft model A-320. Traveling from Bangkok Suvarnabhumi Airport to Phuket International Airport. In which the landing airport has island terrain. Therefore, requires high security due to physical characteristics in the airspace which has many factors such as wind and wind direction and to provide safety and effective landing. Therefore, take the factors affecting the landing to predict the vertical speed. The epoch =2000, learning rate =0.01, accuracy more than 90% for training set and 90% for test set.
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Variable to variable crossover in GA to solve PAPR reduction in OFDM systems
(2014-02-12)
U-Thong, Sutud
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Pradabpet, Chusit
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La-Inchua, Jaraspat
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Chivapreecha, Sorawat
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Soontornwong, Parinya
The hybrid of partial transmit sequences (PTS) and cascade adaptive peak power reduction (CAPPR) methods have been used to reduce peak to average power ratio (PAPR) of orthogonal frequency division multiplexing (OFDM) system. When number of sub-block increases, PAPR is getting small. However, the calculation cost of its selection must be considerably large. We introduce variable to variable crossover in GA, the total calculation cost becomes drastically reduced. The parameter for simulation used standard WLAN in IEEE 802.11a system. In simulation results, the proposed method shows the improvement performance PAPR and bit error rate (BER) of an OFDM system.
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A transient-free structure for Lagrange-type variable fractional-delay digital filter
(2014-01-01)
Soontornwong, Parinya
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Chivapreecha, Sorawat
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Pradabpet, Chusit
This paper presents a new structure for Lagrange-type variable fractional-delay (VFD) filter. A new structure is formulated from discrete Pascal transform (DPT) and its Pascal interpolation. The computational complexity which obtained from proposed structure is linear function of VFD filter order as same as the so-called Taylor's series structure and also be modular structure. Unfortunately, Taylor's series structure is suffered from transient error that caused from changing delay parameter but the proposed structure can online adjust delay parameter without transient error. Therefore, a transient-free structure will be the new choice for Lagrange-type VFD filters structure which is suitable for real-time application such as sampling rate conversion (SRC) and timing recovery in digital receiver. © 2014 IEEE.
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The hybrid of PTS-CAPPR methods with MA for PAPR reduction in OFDM systems
(2013-12-31)
Pradabpet, Chusit
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Chivapreecha, Sorawat
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Yimman, Surapan
The hybrid of partial transmit sequences (PTS) and cascade adaptive peak power reduction (CAPPR) methods have been used to reduce peak to average power ratio (PAPR) of orthogonal frequency division multiplexing(OFDM) system. When number of sub-block increases, PAPR is getting small. However, the calculation cost of its selection must be considerably large. W e introduce memetic algorithm(MA), the total calculation cost becomes drastically reduced. The parameter for simulation used standard WLAN in IEEE 802.11a system. In simulation results, the proposed method shows the improvement performance PAPR, bit error rate (BER) and power spectrum density (PSD) of an OFDM system. © 2013 IEEE.
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A Cubic Hermite variable fractional delay filter
(2011-12-01)
Soontornwong, Parinya
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Chivapreecha, Sorawat
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Pradabpet, Chusit
This paper presents a design and realization of cubic Hermite variable fractional delay (VFD) filter. Cubic Hermite interpolation will be formulated to cubic Hermite VFD filter which the amplitude response and delay response of proposed cubic Hermite VFD filter depend on the used approximation of first derivative. The structure realization of cubic Hermite VFD filter is shown based on Farrow structure as well. Finally, the amplitude response and delay response of the proposed cubic Hermite VFD filter will be compared with the cubic B-spline and Lagrange-type VFD filter. © 2011 IEEE.
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New hybrid of PTS-CAPPR methods with non-uniform phase factor and coded SI technique in OFDM systems
(2011-08-12)
Pradabpet, Chusit
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Miyanaga, Yoshikazu
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Chivapreecha, Sorawat
In this paper, we propose a new PAPR reduction by using hybrid of partial transmit sequences (PTS) and cascade adaptive peak power reduction (CAPPR) methods with non-uniform phase factor and coded side information (SI) technique. These methods are used for reduce peak to average power ratio (PAPR) in an orthogonal frequency division multiplexing (OFDM) system. The hybrid of PTS-CAPPR methods when number of sub-block increases, high efficiency of PAPR reduction can be obtained. However, a quite large calculation cost must be demanded and thus it is impossible to obtain the optimum. In the proposed method, we introduce non-uniform phase factor and coded SI technique. The total calculation cost and number bit of side information for recovering original data becomes drastically reduced. In simulation results, the proposed method demonstrated the improvement of PAPR and bit error rate (BER) performance. © 2011 IEEE.
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New hybrid of PTS-CAPPR methods using GA for PAPR reduction in OFDM systems
(2009-12-01)
Pradabpet, Chusit
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Yoshizawa, Shingo
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Miyanaga, Yoshikazu
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Dejhan, Kobchai
In this paper, we propose a new PAPR reduction by using the hybrid of partial transmit sequences (PTS) and cascade adaptive peak power reduction (CAPPR) methods with coded side information (SI) technique design by genetic algorithm(GA). These methods are used in an Orthogonal Frequency Division Multiplexing (OFDM) system. The OFDM employs orthogonal subcarriers for data modulation. These sub-carriers unexpectedly present a large peak to average power ratio (PAPR) in some cases. A proposed reduction method consists of these two methods and realizes both advantages at the same time. In order to obtain the optimum condition on PTS for PAPR reduction, a quite large calculation cost must be demanded and thus it is impossible to obtain the optimum PTS. In the proposed method, by using the pseudo-optimum condition with a coded SI technique designed by GA, the total calculation cost becomes drastically reduced. In simulation results, the proposed method shows the improvement on PAPR and also reveals the high performance on bit error rate (BER) of an OFDM system. ©2009 IEEE.
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New PAPR reduction in an OFDM system using hybrid of PTS-CAPPR methods with GA coded side information technique
(2009-01-01)
Pradabpet, Chusit
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Yoshizawa, Shingo
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Miyanaga, Yoshikazu
;
Dejhan, Kobchai
In this paper, we propose a new PAPR reduction by using the hybrid of partial transmit sequences (PTS) and cascade adaptive peak power reduction (CAPPR) methods with side information (SI) technique coded by genetic algorithm (GA). These methods are used in an Orthogonal Frequency Division Multiplexing (OFDM) system. The OFDM employs orthogonal sub-carriers for data modulation. These sub-carriers unexpectedly present a large peak to average power ratio (PAPR) in some cases. A proposed reduction method realizes both the advantages of PTS and CAPPR at the same time. In order to obtain the optimum condition on PTS for PAPR reduction, a quite large calculation cost is demanded and thus it is impossible to obtain the optimum PTS in a short time. In the proposed method, by using the pseudo-optimum condition based on a GA coded SI technique, the total calculation cost becomes drastically reduced. In simulation results, the proposed method shows the improvement on PAPR and also reveals the high performance on bit error rate (BER) of an OFDM system. Copyright © 2009 The Institute of Electronics, Information and Communication Engineers.
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New PTS method with coded side information technique for PAPR reduction in OFDM systems
(2008-12-01)
Pradabpet, Chusit
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Yoshizawa, Shingo
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Miyanaga, Yoshikazu
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Chivapreecha, Sorawat
;
Dejhan, Kobchai
In this paper, we propose a new PAPR reduction by using a partial transmit sequences (PTS) method with coded side information (SI) technique. These methods are used in an Orthogonal Frequency Division Multiplexing (OFDM) system. The OFDM employs orthogonal sub-carriers for data modulation. These sub-carriers unexpectedly present a large Peak to Average Power Ratio (PAPR) in some cases. In order to reduce PAPR, the sequence of input data is partitioned into disjoint sub-block of PTS. If number of sub-block increases, high efficiency of PAPR reduction can be obtained. However, a quite large calculation cost must be demanded and thus it is impossible to obtain the optimum PTS. In the proposed method, we introduce a coded side information technique assuming the pseudo-optimum condition into the PTS. The total calculation cost becomes drastically reduced and side information bits for recovering original data in demodulation. In simulation results, the proposed method demonstrated the improvement of PAPR and bit error rate (BER) performance. © 2008 IEEE.

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