Uplink Frequency The uplink frequency is the frequency which is used for transmission of signals from earth station transmitter to the satellite. The tracking tab shows the current transmitter and receiver frequency. This 'extended GSM', E-GSM, uses frequency range 880 - 915 MHz (uplink) and 925 - 960 MHz (downlink), adding 50 channels (channel numbers 975 to 1023 and 0) to the original GSM-900 band. 2011.The C band is primarily used for voice and data communications as well as backhauling. Cianca, E., Rossi, T., Yahalom, A., et al.,"EHF for Satellite Communications: The New Broadband Frontier,"Proceedings of the IEEE, Vol. Rossi, T., Cianca, E., Lucente, M., et al.,"Experimental Italian Q/V Band Satellite Network,"2009 IEEE Aerospace Conference, pp. Jebril, A., Lucente, M., Ruggieri, M., Rossi, T.,"WAVE - A New Satellite Mission in W-band,"2005 IEEE Aerospace Conference, pp. Commercial Application: There is growing commercial interest in W-band and V-band for terrestrial wireless communication. PHASE III: Phase III Dual Use Applications: Military Application: MILSATCOM systems would benefit from high capacity satellite uplink / downlink capability at W-band and V-band. The phase 2 should result in an understanding of the key performance parameters and achievable performance for a practical realization of the revised transceiver concept. PHASE II: The phase 2 will focus on mitigating key technology risks identified in the phase 1 effort through software or hardware development, testing and demonstration. The phase 1 effort should identify key technology risks and design uncertainties, and develop mitigation strategies to address those issues in a phase 2 effort. PHASE I: The phase 1 effort must examine the many design trades available (i.e., power, aperture, channel bandwidth, electronics) and implementation risks. The contractor can make reasonable assumptions for the design of the companion ground transceivers. It should be assumed that the transceiver would be integrated onto an existing communications satellite spacecraft and bus. The design is not constrained to off-the-shelf components or space-qualified components. The uplink frequency band is limited to 81 86 GHz, and the downlink frequency band is limited to 71 76 GHz. An optimal transceiver design concept should minimize key performance parameters of size, weight, power, and cost, while maximizing transceiver performance (capacity, flexibility, and availability). The technical merit of a proposed transceiver concept or research activity must be demonstrated with respect to requirements resulting from a link analysis and should address a key technical risk or design problem. Proposers must demonstrate an understanding of satellite transceiver design, systems engineering, and implementation issues. Successful phase 1 and phase 2 efforts will provide tools and/or mature technologies to facilitate transceiver development. Innovative designs and/or research activities are solicited to support development of a satellite W/V-band transceiver. The specific technology need addressed by this research topic is design and development of a satellite W/V-band transceiver. The specific field-of-study for this research is satellite communication (i.e., link analysis, encoding and decoding, transmission and detection, channel propagation effects, and electronics). This technology is intended to support future high-bandwidth satellite (geosynchronous) to-ground communication. The fundamental purpose of this research topic is to mitigate key technology risks to enable development of future satellite communication architectures using W-band (for uplink) and V-band (for downlink). Potential advantages include recent advances in space qualifyable processors and millimeter-wave amplifier electronics. A disadvantage is the considerable uncertainty regarding channel propagation characteristics at these frequency bands. ![]() These much shorter millimeter wavelengths introduce unique technical challenges and opportunities. ![]() To avoid growing congestion at the Ku and Ka frequencies and to access a much broader spectrum, the Air Force is exploring the potential of operating satellite transceivers (also called transponders) in the W and V frequency bands. The current state-of-the-art for high-bandwidth satellite communication utilizes Ku and Ka-band frequencies. DESCRIPTION: Demand for military satellite communication capability and bandwidth continues to increase. OBJECTIVE: Develop satellite transceivers with W-band (81-86 GHz) uplink and V-band (71-76 GHz) downlink capability.
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