Collision Signal Reception in Fading Channels for MANETs: Combining Fading Channel Estimation and Frame-Collision-Interference Cancellation Based on Restricted Retransmission

Mobile ad-hoc networks (MANETs) boast advan-tages of self-organization, distribution, and heterogeneous characteristics, making them widely applicable in military, firefighting, and medical field. However, the randomly transmission in self-organization networks faces the frame collision challenge. To address this issue, this paper studies a strategy that combines a restricted-retransmission with frame-collision-interference can-cellation (RFC), to identified the collided frames from different users. Additionally, considering the fading channel, this paper proposes a two-user joint fading estimation algorithm based on RFC strategy. Simulation results show that the mean squared error (MSE) of channel estimation and the bit error rate (BER) of demodulation are improved compared to traditional methods.