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We consider multiple packet reception (MPR) for asynchronous random access wireless mobile ad hoc networks. An interference cancellation algorithm is proposed that exploits the base-band cyclostationarity properties of the signal, which are induced at the transmitters by means of modulating the symbols with distinct polynomial phase sequences. In contrast to the method presented in [A.J. van der Veen and L. tong, 2002], the proposed technique docs not require knowledge of the starting time of transmission of the desired signal and can be applied to dispersive multipath channels. Also a practical way of assigning the modulating sequences via the use of a common codebook known to all nodes is proposed, and the impact on local throughput of such scheme is analyzed.