Simultaneous multiple packet capture based on SIR levels and arrival delay offsets in CDMA packet networks

This paper proposes an analytical method to study multipacket capture effects in a code-division multiple-access (CDMA) communication system considering both signal-to-interference ratio (SIR) levels and packet arrival delay offsets. Single- and double-packet capture probabilities are derived explicitly based on CDMA cochannel interference threshold, which can be generalized to study the n-packet capture effect in a CDMA packet data network. Performance of a common coded spread-spectrum (SS) packet network is taken as an example to exemplify the validity of the derived analytical model for studying double-packet power-delay capture. It is concluded from the analytical results of this paper that the n-packet-capture capability can significantly enhance the performance of an SS packet data network, which is usually underestimated in the literature otherwise.