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The project is finalized to assess the feasibility of realizing one of the Technological Demonstration Payloads (TDP), to be hosted aboard the Alphasat satellite (the main passenger of which will be a proper operational payload). This TDP named Q/V band payload, took the identifier TDP#5. This Phase-A contract, awarded to Space Engineering, has the purpose of providing the technical and planning data needed to evaluate all implications of flying said Q-/V-band payload aboard the Alphasat, in parallel with the main-mission payload. The main objective of the proposed experimental mission is to support three activities:
Advance in communications and propagation experiments in leading frequency bands.
Benefits in terms of Knowledge in the area of modulation, coding and signal fading.
The main objective of the Communications Experiments is to test, in the Q/V bands communication context, the Interference and Fading Mitigation Techniques.
The functional architecture that allows the performing of this test is shown in Figure 1. In addition to the Q/V Band payload, two ground stations compliant with the DVB-S2 standard are used. Each ground station is able to transmit to the other station, by means of the satellite, the quality information computed by its own demodulator. Note that in the block diagram of the Ground stations a Noise Generator has been inserted to allow the simulation of worst atmospheric conditions also in a Clear Sky situation.Figure 1: Architecture of the TDP 5 Communication experiment
The development plan is tailored to Alphasat main Mission Plan. The payload DDP intends to realise the P/L by middle 2008 to integrate it on board the platform.
The Phase A has been concluded with: