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User Cooperation is a promising technology to obtain diversity gain at terminals. According to the traditional decode-and-forward scheme, relay node help to transmit source node's information with fixed number of modulation symbols all the time. It is not optimal in view of spectral efficiency, especially when the channel state is good. This paper introduces the adaptive DF scheme based on the minus...
In this paper, we introduce the architecture for implementing a wideband general purpose digital modulator which can generate commonly-used modulation format signals. The symbol rate of modulation signals can be from 500kS/s up to 45MS/s. In order to use the same analog low-pass filters (LPF) to cancel all image signals from D/A converter (DAC) under different output signal bandwidth, we employ Cascaded...
In this paper, we introduce the architecture for implementing a wideband general purpose digital modulator which can generate commonly-used modulation format signals. The symbol rate of modulation signals can be from 500kS/s up to 45MS/s. In order to use the same analog low-pass filters (LPF) to cancel all image signals from D/A converter (DAC) under different output signal bandwidth, we employ cascaded...
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