Analysis on Channel Capacity of Transform Domain Communication System

Abstract

Transform Domain Communication System (TDCS) has caught attention for its characteristics of flexible spectrum application, excellent anti-interference performance and low interception probability. Analysis on channel capacity is one aspect of important basic theory research for TDCS. The fundamental principle of TDCS is studied at first. Then the channel capacity model of TDCS is deduced and built on the background of Gaussian white noise channel with typical interference. The channel capacity of TDCS under different spectrum sensing methods is investigated on the basis of the model. The research indicates that the spectrum sensing methods based on AR model and wavelet-packet transform make more improvement for TDCS channel capacity. Therefore, from the perspective of maximizing TDCS channel capacity, the spectrum sensing methods based on AR model and wavelet-packet transform can be adopted. DOI : http://dx.doi.org/10.11591/telkomnika.v12i4.4112