Noncoherent UWB with block coded modulation in cooperative communications systems

Recently, the concept of the cooperative communications has been applied extensively for the ultra-wideband (UWB) system. In this paper, the cooperative scheme of the noncoherent UWB impulse radio system with block-coded modulation (BCM) having a codeword matching and signal aggregation (CMSA) detection is discussed under different fading environments, which has not been studied yet. To enlarge the operation range of the USB system, the amplify-and-forward scheme is used as a relay protocol to re-transmit signals from source to destination. Simulation results illustrate that the proposed method performs better than that without a cooperative scheme over the Nakagami-μ fading channel.