Boonsrimuang, Pisit

Preferred name

Boonsrimuang, Pisit

Alternative Name

Boonsrimuang, P.

Main Affiliation

School of Engineering

pisit.bo@kmitl.ac.th

Now showing 1 - 10 of 12

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Proposal of improved PTS method for OFDM signal in the multi-path fading channel
(2008-10-06)
Boonsrimuang, Pisit
;
Boonsrimuang, Pornpawit
;
Paungma, Tawil
The major drawback of orthogonal frequency division multiplexing (OFDM) is a large Peak-to-Average Power Ratio (PAPR). To overcome the PAPR problem, many PAPR reduction methods have been proposed. Partial Transmit Sequence (PTS) method is a well - known method to reduce the PAPR statistics of an OFDM signal. The PTS method can reduce the PAPR by controlling the multiplied weighting factor of sub-block both data sub carrier and clusters. The PTS method can improve PAPR reduction performance very well as increasing a number of weighting factors and clusters. However, the number of side information is proportionally increasing as increased number of weighting factors or/and clutters, which are required to inform the side information to the receiver for recovering the original data. In this paper, we propose the new weighting factor which can improve the PAPR reduction performance better than conventional PTS method. The proposed method doesn't have any additional number of side information and system complexity. The proposed method can achieve both a better PAPR performance and BER performance with keeping the same number of side information when compare with the conventional PTS method. This paper presents various computer simulation results to verify the effectiveness of proposed method in the multi-path fading channel. ©2008 IEEE.
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Proposal of simple PAPR reduction method for OFDM signal by using dummy sub-carriers
(2008-01-01)
Boonsrimuang, Pisit
;
Mori, Kazuo
;
Paungma, Tawil
;
Kobayashi, Hideo
One of the disadvantages of using OFDM is the larger peak to averaged power ratio (PAPR) in its time domain signal as compared with the conventional single carrier modulation method. The larger PAPR signal would course the fatal degradation of bit error rate (BER) performance due to the inter-modulation noise occurring in the non-linear amplifier. To overcome this problem, this paper proposes a simple PAPR reduction method by using dummy sub-carriers, which can achieve the better PAPR performance with less computational complexity than the conventional method. This paper presents various computer simulation results to verify the effectiveness of proposed method as comparing with the conventional method in the non-linear channel. Copyright © 2008 The Institute of Electronics, Information and Communication Engineers.
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Traffic forecasting and navigation assistance system via web application
(2007-12-01)
Meemongkol, Amnat
;
Numsomran, Arjin
;
Tipsuwannaporn, Vittaya
;
Boonsrimuang, Pisit
This paper presents a model of Traffic Forecasting and Navigation Assistance System via Web Application which provides guidance information to drivers for the efficient route planning. Traffic Forecasting and Navigation Assistance System (TFNAS) consists of survey car with GPS module which has rolls of reading traffic information and sending the information to TFNAS Center via internet. TFNAS Center is the center of GPS database and traffic information processing system. It collects GPS information real-time, calculates the traffic density and sends the guidance information of the most effective route which has a least time of arrival to Front-end Devices, Smart Phone PDA Laptop, via Web Brower. © ICROS.
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A new weighting factor with concurrent PAPR reduction algorithm for STBC MIMO-OFDM
(2009-12-01)
Mata, Tanairat
;
Boonsrimuang, Pornpawit
;
Boonsrimuang, Pisit
;
Kobayashi, Hideo
Partial Transmit Sequences (PTS) method seems to be attractive for the reduction of Peak to Average Power Ratio (PAPR) in the Orthogonal Frequency Division Multiplexing (OFDM) system, since it can obtain better PAPR property by modifying OFDM signals without any degradation of BER performance. Meanwhile it also shows the potential capability to be utilized in MIMO-OFDM system with a concurrent PAPR reduction algorithm based on the property of orthogonal Space-Time Block Coded (STBC)[1]. On the other hand, the PTS method can improve the PAPR reduction performance very well as increasing the number of weighting factors and clusters. However, the size of side information proportionally increases as increasing the number of weighting factors or/and clutters, which are required to the receiver for recovering the original data. In this paper, we propose a new determination method for the weighting factor of PTS in conjunction with the concurrent [2] algorithm for the STBC MIMO-OFDM systems, which can improve the PAPR performance, computation complexity without any increasing of side information, and improve the BER (Bit Error Rate) performance. ©2009 IEEE.
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Proposal of improved PTS method for OFDM signal
(2007-01-01)
Boonsrimuang, Pisit
;
Mori, Kazuo
;
Paungma, Tawil
;
Kobayashi, Hideo
The major drawback of orthogonal frequency division multiplexing (OFDM) is a large Peak-to-Average Power Ratio (PAPR). To overcome the PAPR problem, many PAPR reduction methods have been proposed. Partial Transmit Sequence (PTS) method is a well - known method to reduce the PAPR statistics of an OFDM signal. The PTS method can reduce the PAPR by controlling the multiplied weighting factor of sub-block both data sub carrier and clusters. The PTS method can improve PAPR reduction performance very well as increasing a number of weighting factors and clusters. However, the number of side information is proportionally increasing as increased number of weighting factors or/and clutters, which are required to inform the side information to the receiver for recovering the original data. In this paper, we propose the new weighting factor which can improve the PAPR reduction performance better than conventional PTS method. The proposed method doesn't have any additional number of side information and system complexity. The proposed method can achieve both a better PAPR performance and BER performance with keeping the same number of side information when compare with the conventional PTS method. This paper presents various computer simulation results to verify the effectiveness of proposed method. © 2007 IEEE.
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Improved PTS method with new weighting factor technique for OFDM signal
(2009-10-12)
Boonsrimuang, Pornpawit
;
Sanpan, Sunisa
;
Boonsrimuang, Pisit
;
Paungma, Tawil
;
Kobayashi, Hideo
Partial Transmit Sequence (PTS) method is a well - known method which can reduce the peak-to-average ratio (PAPR) for an OFDM signal. A major drawback of PTS method is its higher computation complexity due to the necessity of larger number of inverse fast Fourier transforms (IFFT). The PTS method with low computation complexity, called decomposition PTS sub-blocking was proposed [1] which employs the radix-r inverse fast Fourier transform (IFFT) for the signals at the middle stages of an N-point radix-r IFFT and decimation in frequency (DIF) domain. This method (DIF-IFFT) can reduce the computation complexity relatively while providing PAPR reduction similar to other PTS techniques. On the other hand, PTS method can improve PAPR reduction performance very well as increasing a number of weighting factors and clusters. However, the size of side information proportionally increases as increasing the number of weighting factors or/and clutters, which are required to inform the side information to the receiver for recovering the original data. In this paper, we propose the new weighting factor technique in conjunction with D-PTS sub-blocking technique which can improve both the PAPR performance and computation complexity without any increasing of side information. © 2009 IEEE.
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Design of PI controller using MRAC techniques for couple-tanks process
(2009-11-01)
Boonsrimuang, P.
;
Numsomran, A.
;
Kangwanrat, S.
The typical coupled-tanks process that is TITO plant has the difficulty in controller design because changing of system dynamics and interacting of process. This paper presents design methodology of auto-adjustable PI controller using MRAC technique. The proposed method can adjust the controller parameters in response to changes in plant and disturbance real time by referring to the reference model that specifies properties of the desired control system.
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Proposal of clipping and inter-modulation noise mitigation method for OFDM signal in non-linear channel
(2005-01-01)
Boonsrimuang, Pisit
;
Mori, Kazuo
;
Paungma, Tawil
;
Kobayashi, Hideo
One of the disadvantages of using OFDM is the larger peak to averaged power ratio (PAPR) of the time domain signal as compared with the conventional single carrier transmission method. The OFDM signal with larger PAPR will cause the undesirable spectrum regrowth and the larger degradation of bit error rate (BER) performance both due to the inter-modulation products occurring in the non-linear amplifier at the transmitter. The clipping method in conjunction with the Decision Aided Reconstruction (DAR) method is well known as one of the solutions to improve the BER performance with keeping the better PAPR performance. However, the DAR method is proposed to mitigate only the clipping noise and not for the inter-modulation noise. In this paper, we propose the Improved DAR (IDAR) method, which can mitigate both the clipping noise and inter-modulation noise on the basis of DAR method. The proposed method enables the efficient usage of transmission power amplifier at the transmitter with keeping the better PAPR and BER performances. This paper presents various computer simulation results to verify the performance of proposed IDAR method in the non-linear channel. Copyright © 2005 The Institute of Electronics, Information and Communication Engineers.
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PAPR reduction method for OFDM signal by using dummy sub-carriers
(2006-01-01)
Boonsrimuang, Pongsakorn
;
Boonsrimuang, Pisit
;
Mori, Kazuo
;
Paungma, Tawil
;
Kobayashi, Hideo
One of the disadvantages of using OFDM is the larger peak to averaged power ratio (PAPR) in its time domain signal. The larger PAPR signal would course the fatal degradation of bit error rate performance (BER) due to the intermodulation noise in the non-linear channel. This paper proposes an improved DSI (Dummy Sequence Insertion) method, which can achieve the better PAPR and BER performances. The feature of proposed method is to optimize the phase of each dummy sub-carrier so as to reduce the PAPR performance by changing all predetermined phase coefficients in the time domain signal, which is calculated for data sub-carriers and dummy sub-carriers separately. To achieve the better PAPR performance, this paper also proposes to employ the time-frequency domain swapping algorithm for fine adjustment of phase coefficient of the dummy subcarriers, which can achieve the less complexity of processing and achieves the better PAPR and BER performances than those for the conventional DSI method. This paper presents various computer simulation results to verify the effectiveness of proposed method as comparing with the conventional methods in the non-linear channel. ©2006 IEEE.
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Mobile Internet navigation system
(2002-01-01)
Boonsrimuang, P.
;
Kobayashi, H.
;
Paungma, T.
This paper presents a mobile Internet navigation system (MINS) which can provide traffic-condition acquisition and monitoring convenience for mobile phone users by using the wireless application protocol (WAP) format. This system operates in two ways. Firstly, mobile phone users can access the network to request road traffic information from the database of the server. This feature is useful to a user in planning the optimum route to a destination. Secondly, the user can monitor real time traffic information on the screen of the mobile phone. The traffic information includes quantity of cars for both main roads and their branch roads. These data are collected from sensors at all locations and are relayed to the client's computer by the traffic controller via the Internet and are stored at the database in the server. This system enables mobile phone users to acquire real time traffic condition data from the server for deciding the optimum road route in their travels.

Boonsrimuang, Pisit

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