WSEAS Transactions on Communications
Print ISSN: 1109-2742, E-ISSN: 2224-2864
Volume 12, 2013
Performance of LDPC-Coded APSK-Modulation for Wireless USB
Authors: ,
Abstract: The creation of Ultra-Wideband (UWB) radio platform has allowed the development of high bit-rate Wireless-USB offering High Definition video streaming. Quadrature Phase Shift Keying (QPSK) and Dual Carrier Modulation (DCM) are the current modulation schemes used for Multiband Orthogonal Frequency Division Multiplexing (MB-OFDM) in the ECMA-368 defined UWB radio platform. ECMA-368 offers up to 480 Mb/s instantaneous bit rate to the Medium Access Control (MAC) layer to enable the high-rate transmission, but depending on radio channel conditions dropped packets unfortunately result in a lower throughput. This paper presents a higher data rate Coded modulation scheme that fits within the configuration of the current standard to increase the system throughput by achieving 960 Mb/s (reliable to 3 meters) thus maintaining the high rate USB throughput even with a moderate level of dropped packets. The system performance for LDPC coded 32-APSKmodulation is simulated in realistic multipath environments.
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Keywords: APSK (Amplitude Phase Shift Key), Multi band-Orthogonal frequency-division multiplexing (MB-OFDM), ultra-wideband (UWB), wireless personal area networks (WPAN)