Reducing MAI in Cluster Based Sensor Network Using FDMA-CDMA Technique

The performance of code division multiple accesses in sensor networks is limited by multiple access interference (MAI). In this article, we propose a frequency division technique to reduce the MAI in a DS-CDMA sensor network. Our proposal also reduces the energy consumption of the network. In the model, first a new clustering technique is used over several numbers of randomly deployed sensor nodes to form different clusters and then use FDMA-CDMA technique in different clusters. Simulation is done for the proposed system and compared it with other systems, which do not use frequency division. The study found that, by using few number of frequency channels, the MAI can be reduced significantly. The system also has less channel contention, and lower energy consumption.