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Communication Over Radio Links
Types of Modulation
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5-unit code amplitude modulation antenna ARQ system ARQ terminal automatic bandwidth Block diagram call-down carrier CCITT character error rate Class of emission code combinations connection converter data transmission demodulator diplex diversity method diversity reception employed error bursts facsimile fading falsified forward error correction frequency diversity frequency modulation frequency shift frequency-shift keying input interference ionosphere isochronous distortion keying layers message transmission modulation rate noise output circuit phase picture frequency polarity propagation radio circuits radio equipment receive branch receive side receiving end receiving station repetition cycle RQ signal RR Radio receiver RT Radio transmitter selection shortwave links shortwave radio links shortwave range sideband signal element signal repetition signal-to-noise ratio single-channel single-sideband space diversity start-stop stop-polarity subscriber synchronous telegraph and data telegraph speed teleprinter telex terminal equipment traffic transmission channel transmission circuit transmission path transmitting branch types of transmission voice-frequency telegraph wave WTK channel