Performance analysis on single sideband of TD-AltBOC modulation signal

Abstract

TD-AltBOC modulation signal is a new signal. Similar to AltBOC(15,10) signal, TD-AltBOC signal contains lower and upper sideband signals. From the view of the selection of PN codes for lower and upper sideband signals' pilot components, there are two schemes to achieve TD-AltBOC, namely to choose different PN codes or the same PN code. For considering the cost and complexity of receivers, only the lower sideband signal may be received for mass market receivers. When the receiver is only tracking lower sideband signal's pilot component, due to the non-ideal PN codes and the effect of upper sideband signals, a asymmetrical correlation function may be obtained, which causes the cross zero point of discriminator curve to move, so code tracking bias error is introduced. In this paper, we analyze the reason and condition why correlation function is asymmetry, and make performance analysis on single sideband of TD-AltBOC modulation Signal. Simulation results show that the selection of PN codes for data component may cause correlation function asymmetry. In order to reduce the effect on single sideband reception and reach the same performance with AltBOC(15,10), the selection of PN codes has to meet requirement of this paper. © 2013 Springer-Verlag Berlin Heidelberg.