Due to the limited availability of spectrum allocations for communications systems, it has become desirable to reuse existing spectrum by employing bandwidth efficient modulation methods to existing satellite communications systems. As the number of users of a given communication system increases, it often becomes necessary to augment the system with additional communication signals. One method that has been used to achieve this goal in Timing, Telemetry and Command (TT&C) links is conventional subcarrier phase modulation. In this work we present a new subcarrier modulation technique called Quadrature Product Subcarrier Modulation (QPSM) that enables the transmission of a quadrature multiplexed carrier modulation with single or multiple subcarrier signals in the same constant-envelope waveform. The general approach is applied to the addition of subcarrier signals to a quadrature multiplexed spread-spectrum system. The overall power efficiency is derived for each case under consideration. The modulation's spectral components are derived analytically and the analytical results are compared to results simulated using the Signal Processing WorkSystem simulation environment.


    Zugriff

    Zugriff prüfen

    Verfügbarkeit in meiner Bibliothek prüfen

    Bestellung bei Subito €


    Exportieren, teilen und zitieren



    Titel :

    Quadrature product subcarrier modulation (QPSM)


    Beteiligte:
    Dafesh, P.A. (Autor:in)


    Erscheinungsdatum :

    01.01.1999


    Format / Umfang :

    453020 byte




    Medientyp :

    Aufsatz (Konferenz)


    Format :

    Elektronische Ressource


    Sprache :

    Englisch



    Quadrature Product Subcarrier Modulation (QPSM)

    IEEE; Aerospace and Electronics Systems Society | British Library Conference Proceedings | 1999


    Improved Quadrature Spatial Modulation

    Vo, Binh / Nguyen, Ha H. | IEEE | 2017




    Precoded Non-Orthogonal Frequency Division Multiplexing with Subcarrier Index Modulation

    Chaki, Prakash / Ishihara, Takumi / Sugiura, Shinya | IEEE | 2022