Aerospace, Aviation, Defense and Satellite Communication Testing
Aerospace and Satellite - Critical Communication Links Verified
The Aerospace applications require today multiple wireless high speed data communication links between a spacecraft and a ground station and satellites. Testing the performance of communication systems during the critical stages of launch, flight, space station docking procedures and landing of a spacecraft is essential.
Commercial Aviation - Wireless Broadband for In-Flight Services
The fast deployment of wireless broadband coverage to the aircrafts and jet's sets challenges for network developers and operators. Excessive amount of testing, optimization and verification in a single-link and multilink level is needed in order to provide reliable high speed data links at cruising altitudes for the passengers.
The wireless systems could be based on similar infrastructure as in terrestrial cell networks but cell beams are covering the airline routes instead of terrain. Typically there is a gateway radio installed into aircraft or jet. The gateway covers the end-user devices inside the aircraft.
The links between the gateway and ground base stations needs to be verified, the transceiver must handle high Doppler and range while the core network must control the handoffs between cells and payload optimization for multiple users at multiple aircrafts. The wireless coverage inside the aircraft has to be verified also with the proper indoor radio channel models in a link level and multi-user test case scenarios.
Defense - Data Communication, Radar and Jamming
The amount of wireless applications in defense and in military is wide, basically all environments from space to underground are utilized some how. Most of the scenarios at air-to-air, air-to-ground, ground-to-air and ground-to-ground conditions can be tested in laboratory environment with EB Propsim C8 ASO testing solution.
Typically the communication network is so-called Mesh / Ad-hoc mobile network where multiple radios are communicating with each other. The mesh, ad-hoc mobile network scenarios testing in realistic environment with real-world radio propagation phenomena gives a realistic measures of systems and products.
HF Fading Channel Emulations Overview
The maritime, military, aeronautical systems and long distance AM broadcasting systems are typically utilizing HF frequencies (1 - 30 MHz). Most common radio channel models for the HF frequency band are ionospheric models. These models are suitable for testing long distance radio communication systems, which are taking advantage of ionosphere bouncing of the radiowave. Ionospheric models consist of two Gaussian distributed fading paths with delay difference up to 10ms. Ionospheric models simulate the propagation condition where the transmitted signal travels to the receiver via two beams: one is reflected form ionosphere only once and the other two times or more.