Revisiting of Channel Access Mechanisms in Mobile Wireless Networks through Exploiting Physical Layer Technologies

Figure 10

An example of SIC process when a node receives two signals and simultaneously, where the signal strength of is much stronger than that of . The node first demodulates the strongest signal and gets the corresponding transmitted bit stream ; it then reconstructs the ideal received signal from and subtracts from to get the second signal ; is finally fed into the same preamble synchronization and demodulation process to get the corresponding bit stream . This scenario can be extended to collided packets scenarios theoretically.