NDLI: Differential space-time-frequency codes for mb-ofdm uwb with dual carrier modulation.

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Differential space-time-frequency codes for mb-ofdm uwb with dual carrier modulation.

Content Provider	CiteSeerX
Author	Tran, L. C. Mertins, A.
Abstract	Abstract—In a multiple-input multiple-output (MIMO) multiband orthogonal frequency division multiplexing (MB-OFDM) ultra-wideband (UWB) system, coherent detection where the channel state information (CSI) is assumed to be exactly known at the receiver requires the transmission of a large number of symbols for channel estimation, thus reducing the bandwidth efficiency. This paper examines the use of unitary differential space-time frequency codes (DSTFCs) in MB-OFDM UWB, which increases the system bandwidth efficiency due to the fact that no CSI is required for differential detection. The proposed DSTFC MB-OFDM system would be useful when the transmission of multiple channel estimation symbols is impractical or uneconomical. Simulation results show that the application of DSTFCs associated with dual carrier modulation (DCM) can significantly improve the bit error performance of conventional differential MB-OFDM system (without MIMO), and even provide better bit error performance than the DSTFC MB-OFDM system associated with constant envelope modulation schemes.
File Format	PDF
Access Restriction	Open
Subject Keyword	Mb-ofdm Uwb Dual Carrier Modulation Differential Space-time-frequency Code Dstfc Mb-ofdm System Bit Error Performance Conventional Differential Mb-ofdm System Channel State Information Multiple Channel Estimation Symbol Simulation Result Constant Envelope Modulation Scheme Differential Detection Unitary Differential Space-time Frequency Code Bandwidth Efficiency Multiple-input Multiple-output Large Number Orthogonal Frequency Division Multiplexing Coherent Detection Channel Estimation System Bandwidth Efficiency
Content Type	Text
Resource Type	Article

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