A tone-aided dual vestigial sideband system for digitalcommunications on fading channels

摘要

A spectrally efficient tone-aided dual vestigial sideband(TA/DVSB) system for digital data communications on fading channels ispresented and described analytically. This PSK (phase-shift-keying)system incorporates a feed-forward, tone-aided demodulation technique tocompensate for Doppler frequency shift and channel- induced, multipathfading. In contrast to other tone-in-band-type systems, receiversynchronization is derived from the complete data VSBs. Simulationresults for the Rician fading channel are presented. These resultsdemonstrate the receiver's ability to mitigate performance degradationdue to fading and to obtain proper data carrier synchronization,suggesting that the proposed TA/DVSB system has promise for thisapplication. Simulated BER (bit-error rate) data indicate that theTA/DVSB system effectively alleviates the channel distortions of theland mobile satellite application