Multi-Code Wireless Packet Random Access

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Executive Summary

Spread spectrum multiple-access packetized wireless communications systems are considered. Although very efficient in low traffic (or low-rate) and low signal-to-noise ratio scenarios, the traditional and well-known Spread ALOHA Multiple Access (SAMA) quickly collapses when both traffic and signal power increase. In certain situations, such as wireless sensor network traffic towards a sink, this severely limits the system data collection rates. Multi-Packet Reception (MPR), on the other hand, offers significant improvements in maximum throughput with respect to SAMA, whose performance is limited by the channel's collision mechanism.

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