Arokiaswami Alphones

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We investigate the polarization-mode dispersion (PMD) effect of zero padding OFDM (ZP-OFDM) in direct-detection optical orthogonal frequency division multiplexing (DDO-OFDM) systems. We first study the conventional equalization method for ZP-OFDM. Then an equalization method based on sorted QR decomposition is proposed to further improve the performance. It(More)
In this paper, we propose a QR decomposition based channel equalizer in visible light communication (VLC) systems for indoor broadband wireless access to overcome the bandwidth limitation of phosphor-coated white light emitting diodes (LEDs). The effectiveness of the proposed QR decomposition based channel equalizer is experimentally investigated in a(More)
Composite Right/Left handed Transmission Lines (CRLH TL) generally exhibit as metamaterials based transmission line which is composed of periodic repetition of unit cell comprising of a series capacitance and shunt inductance. Metamaterials generally have a wide range of applications. The paper aims at developing a CRLH TL two unit cell structure to work as(More)
A compact dual-band bandstop filter (BSF) based on composite right/left handed transmission line (CRLH TL)is proposed and designed without any external impedance matching block. The filter is to suppress the interference of the signal at 5.2 and 5.8 GHz, which is the Unlicensed National Information Infrastructure, radio following the IEEE 802.11a standard(More)
In reflective semiconductor optical amplifier (RSOA)-based wavelength division multiplexed passive optical network (WDM-PON), the bit rate is limited by low modulation bandwidth of RSOAs. To overcome the limitation, we apply QR decomposition in channel equalizer (QR-CE) to achieve successive interference cancellation (SIC) for discrete Fourier transform(More)
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