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Orthogonal frequency division multiplexing (OFDM) is an attractive and effective technique for wireless communications. However, an OFDM signal has a large peak-to-average power ratio (PAPR), which will cause serious nonlinear distortion especially when the signal passes through a nonlinear system. Adaptive symbol selection scheme (ASSS) is used to reduce the unwanted PAPR by selecting the adaptive...
Key technology for physical layer (PHY) of worldwide interoperability for microwave access (WiMAX) which conforms to IEEE802.16e standard contains generalized multi-carrier (GMC), adaptive modulation and coding (AMC), etc. This paper firstly introduces orthogonal frequency division multiplexing (OFDM) in the application of WMAN in the broadband wireless access (BWA) protocol IEEE 802.16e, then we...
This paper presents a new energy-efficient cooperative sensor network scheme. Cooperative nodes shift the carrier frequency of the source node, and the destination node receives the signal from the source node and the cooperative nodes as a standard orthogonal frequency division multiplexing (OFDM) receiver. The maximal ratio combining (MRC) approach is applied to achieve full diversity with low complexity...
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