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Wi Max Phy Introduction V0.3
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In this paper, a combined approach where low density parity check (LDPC) codes are used to reduce the complexity and power consumption of pulsed orthogonal frequencydivision multiplexing (pulsed-OFDM) ultra-wideband (UWB) systems is described. The proposed system uses LDPC codes to achieve higher code rates without using convolution encoding and puncturing thereby reducing the complexity and power consumption of pulsed-OFDM system. The LDPCpulsed- OFDM system achieves channel capacity with different code rates and has good performance in different channel fading scenarios. The pulsed OFDM system is used where pulsed signals could spread the frequency spectrum of the OFDM signal. The performance of LDPC-pulsed-OFDM system for wireless personal area networks (WPAN) is analyzed for different UWB indoor propagation channels (CM3 and CM4) provided by the IEEE 802.15.3a Standard activity committee. To establish this, a design of LDPC-pulsed-OFDM system using the digital video broadcasting-satellite-second generation (DVB-S2) standard and provide the simulation results for the different code rates supported by LDPC codes is presented.
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In this paper, a combined approach where low density parity check (LDPC) codes are used to reduce the complexity and power consumption of pulsed orthogonal frequencydivision multiplexing (pulsed-OFDM) ultra-wideband (UWB) systems is described. The proposed system uses LDPC codes to achieve higher code rates without using convolution encoding and puncturing thereby reducing the complexity and power consumption of pulsed-OFDM system. The LDPCpulsed- OFDM system achieves channel capacity with different code rates and has good performance in different channel fading scenarios. The pulsed OFDM system is used where pulsed signals could spread the frequency spectrum of the OFDM signal. The performance of LDPC-pulsed-OFDM system for wireless personal area networks (WPAN) is analyzed for different UWB indoor propagation channels (CM3 and CM4) provided by the IEEE 802.15.3a Standard activity committee. To establish this, a design of LDPC-pulsed-OFDM system using the digital video broadcasting-satellite-second generation (DVB-S2) standard and provide the simulation results for the different code rates supported by LDPC codes is presented.
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