Power controlled coded-sequence self-encoded spread spectrum communications

Abstract

In this paper, we propose to apply power control to coded-sequence self-encoded spread spectrum (CS-SESS) com munications in dynamic fading channels. We determine the statis tical characteristics of the power enhancement in the transmitter due to power control and show that the proposed approach improves the power efficiency in mobile cellular systems. In addition, we propose to mitigate self interference in CS SESS by exploiting the information that the transmitter obtains, through feedback training sequences, about the de-spreading code in the receiver. The results show that the mitigation is significant even with only selective training chips from the de-spreading sequence. Similar improvement can be achieved with feed-forward training sequences to the receiver about the spreading code in the transmitter.