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Author: search.filters.author.Sansoda, BunchaSubject: search.filters.subject.WBAN

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    An Investigation of UWB Path Loss for Body Area Network
    (2018-12-24)
    Sansoda, Buncha
    ;
    Choomchuay, Somsak
    This paper presents the investigation of body area communication channel and provide path loss evaluation by measurement compared with channel model of IEEE 802.15.6 standard. The measurement performs in ultra-wideband frequency range and setup the body in different body poster. The receive antenna is mounted on waist while transmit antenna is placed on wrist and ankle. We found trend of path loss similar as model. The results shows that transmission between the two antenna are highly attenuated when the radio wave propagates across the body. However, if the wave direction propagates along the body as waist to ankle, the path loss would slowly increase. Thus the suitable position of antenna would certainly be important with measurement result to reduce the body effect.
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    Performance evaluation of concatenated coding with diversity reception for body area network
    (2016-03-11)
    Sansoda, Buncha
    ;
    Choomchuay, Somsak
    In wireless communication, it is of significance that the receiving information should be identical to the transmitted information. With this regards, an application of error correction coding (ECC) is one suitable method for maintaining the information precision between the transmission channels. With similar objectives, the diversity techniques are used to moderate the devaluation in the error performance due to the fading impairment by using multiple communication branches. This paper, we propose the application of concatenate codes combined with space diversity technique as maximal ratio combining. We focused on the bit error rate (BER) performance and the impact of Rician fading channel on wireless body area network (WBAN). The finding shows that the proposed scheme can provide considerable improvement on the BER performance compared with that of the traditional system. The concatenate code with MRC outperformed conventional ones, either RS or convolutional codes. At 10-4 of BER, the designed scheme is better than RS code by1.3 dB and convolutional code by2.2dB.
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    Performance evaluation of LDPC codes on patterned WBAN data
    (2015-01-26)
    Sansoda, Buncha
    ;
    Choomchuay, Somak
    ;
    Timakul, Sekson
    ;
    Khattiya, Wannarit
    In this decade, WBAN plays vital role in health care monitoring environment. It has been used more intensively in wider applications. This paper proposes error control coding applied to WBAN. LDPC codes with the block size of 255 bytes are particularly of interest. Patterned information such as MIT-BIH's arrhythmia datasets extracted from Electrocardiography (ECG) of the patients who encountered heart disease. To measure the system performance, random data are also examined. The system was simulated on Rician channel where severe noise are quite nature to WBAN compared to AWGN channel. Rician channel with some K-factors was investigated. The obtained result shows that both patterned data and random data can be recovered well when Eb/N0 equals 3 dB and above. While the code rates were made varied from 0.50 to 0.75, we can obtain the gain of 3 dB, 5 dB, and 6 dB respectively.
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    Performance evaluation of error correction code in MIMO scheme for WBAN channel
    (2014-01-27)
    Sansoda, Buncha
    ;
    Choomchuay, Somsak
    In most communications, the error correction code (ECC) is one good solution to maintaining the information accuracy between the transmitter and the receiver. Multiple-input-multiple-output (MIMO) technology is further adopted to increase the link quality and capacity for the same transmission power. This paper proposes the application of convolutional code (CC) combined with MIMO scheme to reduce the bit error probability in WBAN channel where binary Phase Shift Keying (BPSK) is assumed in channel modulation. The findings show that the combination scheme performs better than the conventional scheme particularly when the constraint length is increases.