Transcript File
http://www.ariss.org An Enhanced/Permanent Amateur Radio Station Proposal L. McFadin, W5DID K. Banke N6IZW • Uses an SDR transceiver and amplifiers to provide all modes and all bands. • Modular design • Easily expandable • Portable • Dual/Cross Band capability • New software uploadable from ground • Mode/frequency selectable from ground • • • • • Can be software based/controlled. Requires Ipad for local user interface. Can limit access to permitted bands via software Can connect to ISS audio/video system Can connect TNC’s, SSTV, Digital voice memory modules,DATV, etc. • System suitable for DATV bandwidths. • Switch for manually selecting preset modes/freqs • Modes – FM, SSB, packet, SSTV,DATV • Uplink bands – 10m, 2m, 70cm, 23cm, 13cm • Downlink bands – 10m, 2m, 70cm, 13cm Proposed overall Block Diagram Station Audio Packet System SSTV System Other Transmit Amplifiers Input Audio Interface RF Switch Ipad User Interface SDR Transmitter Microprocessor SDR DSP and Interface Controller SDR Receiver Wireless Audio Station Audio Packet System SSTV System Other RF Switch Output Audio Interface Receive Amplifiers Station Power Power Conditioner/ Isolator Proposed ISS Receiver Block Diagram To 2.4 GHz Circulator 2.4 GHz LNA To 1.2 GHz Antenna 1.2 GHz LNA Control Lines To 435 MHz Circulator 435 MHz LNA SDR Radio 70-6000 MHz Receiver Audio Output Interface RF Selector Switch To 145 MHz Circulator 145 MHz LNA Rx RF Audio Data Serial Control Port Interface Controller To 29MHz Circulator 29 MHz LNA Up converter Proposed ISS Transmitter Block Diagram 2.4 GHz Antenna 2.4 GHz Amplifier Control Lines Bandpass Filter & Circulator 435 MHz Antenna 435 MHz Amplifier SDR Radio 70-6000 MHz Transmitter Bandpass Filter & Circulator RF Selector Switch Input Audio Interface 145 MHz Antenna 145 MHz Amplifier Bandpass Filter & Circulator 29 MHz Antenna Tx RF Audio Data Serial Port Control Interface Controller 29 MHz Dwn Conv 29 MHz Amplifier Bandpass Filter & Circulator • Tasks – – – – – – SDR Transmitter/Receiver module RF switching & coupling module Audio interface module Controller interface module Controller interface software Packet software • Tasks (continued) – – – – – – Antennas RF, power, & control penetrations Power Supply Internal & External wiring Wireless remote station Integration & configuration control • Issues • funding • need to decide who does what (hardware, software, testing, safety, etc.) • frequencies • Summary – flexible, upgradeable, expandable – Meets all ARISS requirements and ISS specifications – promotes international participation