An enhancement of direct sequence spread spectrum (DSSS) technique in LTE and Wi-Fi coexistence technologies

This paper presented an enhanced of SINR based on serving and neighboring path loss to mitigate co-channel interference by using DSSS technique in LTE-Wi-Fi network. The proposed technique is the continuity from the earlier work which enhanced the DSSS with new coefficient: chip rate coefficient and radius fraction coefficient. The earlier works only consider its serving BS for path losses values. In this paper, an enhance DSSS technique is proposed which considers path losses for both serving and its neighbouring base stations in the network. The purpose of the proposed technique is to improve the signal-interference-to-noise ratio (SINR) value at UEs. The proposed technique applied delta path loss which is the path loss difference between the serving and the neighbours BSs. As the results, the SINR at MUE using the proposed technique gives better SINR around 66%~72% improvements. On the other hand, the SINR at WUE using the proposed technique also gives better SINR around 155%~170% improvements.