413x0g2 - CCSDS

CCSDS REPORT CONCERNING BANDWIDTH-EFFICIENT MODULATIONSANNEX BSIMULATED MODULATION PERFORMANCEWITH SSPA OPERATING IN SATURATIONThis annex provides simulated performance data of the efficient modulations described inthis Green Book when amplified by an SSPA operating at 0 dB output backoff referenced tomaximum output power (corresponding to Input Backoff at –3 dB for the reference SSPA inthis annex). This data includes occupied bandwidth, BER with matched filter and I&Dreceivers, and interference susceptibility. The reader should be aware that the performanceof these modulations is highly dependent on the actual receiver and transmitter hardwarecharacteristics including but not limited to the power amplifier linearity and operating point,symbol asymmetry, data imbalance, modulator gain/phase imbalance, local oscillator phasenoise and, for digital applications, time/amplitude quantization. The data provided in thisannex is indicative of system performance expected using the reference model. Actualperformance is highly dependent upon transmitter and receiver characteristics.Only distortions caused by amplifier AM/AM and AM/PM are considered in the resultspresented in this annex. The AM/AM and AM/PM curves used in the simulations originatedfrom measurements of a 10W SSPA provided by ESA and are shown in figures B-1 and B-2,respectively. The performance data in this annex has been extracted from study reportswhich can be found in the CCSDS Yellow Book, Proceedings of the Bandwidth-EfficientModulations Working Documents (reference [1]).Reference SSPAOperating PointFigure B-1: AM/AM Characteristic of Reference SSPACCSDS 413.0-G-2 Page B-1 October 2009