Boonsrimuang, Pisit
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Boonsrimuang, Pisit
Alternative Name
Boonsrimuang, P.
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Email
pisit.bo@kmitl.ac.th
44 results
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Item type:Publication, Proposal of channel estimation method for bi-directional OFDM based ANC in higher time-varying fading channel(2014-01-01); Kobayashi, HideoBroadband Analog Network Coding (ANC) based on OFDM has been widely investigated to increase capacity of bi-directional relay communications. The broadband ANC based on OFDM technique is required to estimate channel frequency responses (CFRs) between both user terminals (UTs) and a relay station (RS) precisely so as to remove the self-information data from the received signal and to demodulate the other user's information data with frequency equalization. Many channel estimation methods have been proposed for the OFDM based broadband ANC. However bit error rate (BER) performance of these methods would be degraded relatively in higher time- varying fading channels due to the inaccurate estimation of CFR. To solve this problem, this paper proposes a CFR estimation method which can achieve better BER performance with keeping higher transmission efficiency even in higher time-varying fading channels. The salient features of proposed CFR estimation method are to enable the estimation of combined CFR at the UT for both channels between the UTs and RS by using scattered pilot subcarriers and to enable the demodulation of information data without feedback information of CFR estimated at the RS. This paper presents various simulation results in the higher time-varying fading channels to demonstrate the effectiveness of proposed CFR estimation method for the bi-directional OFDM based ANC. - Some of the metrics are blocked by yourconsent settings
Item type:Publication, Proposal of time domain channel estimation method for MIMO-OFDM systems(2015-01-01); - Some of the metrics are blocked by yourconsent settings
Item type:Publication, Proposal of STBC MIMO-OFDM for ITS systems(2013-09-02); - Some of the metrics are blocked by yourconsent settings
Item type:Publication, A low complexity improved-PTS phase coefficient searching algorithm for OFDM system(2011-08-12); Kobayashi, HideoThe Partial Transmit Sequence (PTS) is well known algorithm for reducing peak-to-average ratio (PAPR) in OFDM system. The PTS can improve PAPR reduction performance relatively as increasing a number of weighting factors and clusters. However, the size of side information and computation complexity proportionally increase as increasing the number of weighting factors or/and clusters. The higher computational complexity in the phase coefficient searching makes it difficult to implement in the actual OFDM system. In this paper, we propose a low computation complexity PTS phase coefficient searching algorithm conjunction with new weighting factor. The proposed method can achieve better PAPR reduction performance and computation complexity than those for the conventional PTS method. © 2011 IEEE. - Some of the metrics are blocked by yourconsent settings
Item type:Publication, Iterative based ML demodulation method for OFDM signal under higher mobile environments(2015-07-01); Kobayashi, HideoOrthogonal Frequency Division Multiplexing (OFDM) signal would be damaged significantly by inter- carrier interference (ICI) in higher time-varying fading channels which leads fatal degradation of bit error rate (BER) performance due to the loss of orthogonality among subcarriers. To solve this problem, this paper proposes an iterative based maximum likelihood demodulation (MLD) method which can achieve better BER performance with lower computation complexity even in higher time-varying fading channels. The features of proposed method are to employ a time domain training sequence (TS) in the estimation of channel impulse response (CIR) instead of using pilot subcarriers in the frequency domain and to employ a time domain equalization (TDE) method with a maximum likelihood (ML) estimation instead of using a conventional frequency domain equalization (FDE) method. This paper also proposes a low-complexity iterative method for solving the simultaneous equations in the MLD method instead of using an inverse matrix calculation. This paper presents various simulation results in higher time-varying fading channels to demonstrate the effectiveness of proposed method as comparing with the conventional frequency domain equalization method. - Some of the metrics are blocked by yourconsent settings
Item type:Publication, Proposal of improved PTS method for STBC MIMO-OFDM systems(2010-01-01); Kobayashi, HideoThis paper proposes a new Partial Transmit Sequence (PTS) method in conjunction with the concurrent algorithm for Space Time Block Code Multiple Input Multiple Output-Orthogonal Frequency Division Multiplexing (STBC MIMO-OFDM) systems. The feature of proposed PTS method is that each cluster is divided into two parts and these two parts employ the different weighting factors to achieve the better Peak to Average Power Ratio (PAPR) with keeping the same size of side information and almost the same size of computational complexity as that for the conventional concurrent PTS method. Copyright © 2010 The Institute of Electronics, Information and Communication Engineers. - Some of the metrics are blocked by yourconsent settings
Item type:Publication, Iterative based time domain equalization method for OFDM signal under high mobile environments(2014-01-23) - Some of the metrics are blocked by yourconsent settings
Item type:Publication, Iterative based time domain equalization method for DFTS-OFDM under highly mobile environments(2016-09-06); - Some of the metrics are blocked by yourconsent settings
Item type:Publication, A PAPR Reduction for FBMC-OQAM Signals using ABC-OPTS Scheme(2019-04-29) - Some of the metrics are blocked by yourconsent settings
Item type:Publication, Design MRAC PID control for fan and plate process(2011-01-01); This paper presents the method to achieve the design MRAC PID control for fan and plate process. The fan and plate process is another challenged problem for control system design because it has non-linearity characteristic and highly sensitivity for ambient disturbance. Thus tuning of PID parameter performs hardly by root locus or trial & error method. The proposed method presents design methodology of auto-adjustable PID controller using MRAC technique for solving the problems. The adjustable PID parameters corresponding to changes in plant and disturbance will be determined by referring to the reference model specifying the properties of desired control system. Therefore, this technique is convenient to control the process for satisfying the requirement of the system performance. © 2011 SICE.