Modulation-Based Detect-and-Forward Relaying in Noncoherent UWB Systems

In this paper, we investigate and analyze modulation-based detect-and-forward (MDeF) relaying for the noncoherent ultra-wideband cooperative system under Nakagami- m fading environments, which can cover a wide range of fading conditions. The MDeF relaying is performed based on the codeword modulation and detects symbols through the codeword mapping process and signal waveform aggregation scheme with good noise/interference mitigation. The proposed MDeF relaying is shown that the upper bound of the average bit error probability matches well to numerical counterpart as signal-to-noise ratio becomes larger and outperforms the conventional DeF relaying.