KMITL

Permanent URI for this communityhttps://dspace.kmitl.ac.th/handle/123456789/1

Browse

Settings

Author: search.filters.author.Chaiyapong, SaksitHas files: No

Search Results

Now showing 1 - 2 of 2
  • Loading...
    Thumbnail Image
    Some of the metrics are blocked by your 
    consent settings
    Item type:Publication,
    Ultra wireless transmission waveform measurement with IEEE802.15.3a
    (2013-12-31)
    Promwong, Sathaporn
    ;
    Rankhamrat, Borromwut
    ;
    Thavonsassanavong, Thanin
    ;
    Chaiyapong, Saksit
    Ultra wireless transmission waveform with IEEE802.15.3a or ultra wideband (UWB) band is expected to applied to wireless personal area networks (WPANs) such as the ranging in the home network and the office and broadband multimedia systems. Ultra wideband impulse radio (UWB-IR) transmission waveform is investigated by using extended Friis' transmission formula baseded on measurement data. This paper, we conderation the performance system design on ultra wireless system for WiMedia area networks. The received signal and isotropic template receivers are considered based on Friis transmission formula. In this experimental study, the biconical antennas are uesd as the transmitter (Tx) and the receiver (Rx) antennas. The rectangular passband, which is satisfied the full band of UWB spectrum definition and Federal Communications Commission (FCC) indoor and outdoor limit spectral masks, is used as the transmitted UWB signal. The channels are measured in an indoor environment by using a vector network analyzer (VNA). The UWB transmission gains of received signal and isotropic template receivers are shown and compared in results. © 2013 IEEE.
  • Loading...
    Thumbnail Image
    Some of the metrics are blocked by your 
    consent settings
    Item type:Publication,
    Three-ray path loss based on peak power loss for ultra wideband impulse radio systems
    (2011-12-01)
    Supanakoon, Pichaya
    ;
    Chaiyapong, Saksit
    ;
    Promwong, Sathaporn
    ;
    Takada, Jun Ichi
    Path loss is important parameter to analyze and design link budget. For indoor environment, there is fading that occurs in path loss. Therefore, accurate path loss model, which is considered fading, is necessary. In this paper, three-ray path loss based on peak power loss is proposed for ultra wideband impulse radio (UWB-IR) systems. The rectangular passband is used as UWB-IR transmitted signal. The extension of Friis' transmission formula is applied for UWB-IR three-ray channel. The received signal is evaluated. The closed form formula of three-ray path loss is derived based on peak power loss. The path loss from proposed model was illustrated and compared with three-ray model based on average power loss and free space model. This model can be used to study the characteristic of fading and extended to multi-ray path loss model for indoor environment. © 2011 IEEE.