مورد إلكتروني
Hybrid Tropo Transmission System
| العنوان: | Hybrid Tropo Transmission System |
|---|---|
| المصدر: | DTIC AND NTIS |
| بيانات النشر: | 1976-08 |
| تفاصيل مُضافة: | RAYTHEON CO SUDBURY MA Unkauf, Manfred Bagnell, Robert |
| نوع الوثيقة: | Electronic Resource |
| مستخلص: | This document describes the design, development, laboratory testing, and over-the-air testing of a Digital Data Tropo Transmission System and Hybrid Tropo Transmission System (HTTS). Digital transmission was accomplished at data rates of 1.75, 3.5 and 7.0 Mbps by using the Raytheon Distortion Adaptive Receiver (DAR-IV) modulation/demodulation (modem) technique. Testing of the DAR- IV was performed using the RADC troposcatter media simulator and comfirmed by actual over-the-air tests on the AN/MRC-98, AN/TRC-97 and AN/TRC-132 radio equipments in both modes. The test results showed that the DAR-IV technique has the potential to provide quality digital data transmission on both tactical and DCS troposcatter links. Within its multipath spread capabilities, the DAR-IV was shown to typically operate within 3 dB of theoretical. The extent of multipath spread accommodated was found to be approximately equal to the inverse of the transmission bit rate. Design improvements are identified to achieve greater multipath spread capacity at the higher data rates. Hybrid transmission was accomplished by using separate analog and digital subcarriers with conventional FDM/FM modulation for analog traffic of up to 60 voice channels. Testing in the hybrid transmission mode revealed that a dual subcarrier approach was feasible but somewhat inefficient in power utilization. |
| مصطلحات الفهرس: | Cybernetics, Radiofrequency Wave Propagation, Radio Communications, DIGITAL SYSTEMS, HYBRID SYSTEMS, DATA LINKS, TROPOSPHERIC SCATTER COMMUNICATIONS, MULTIPATH TRANSMISSION, DATA RATE, VOICE COMMUNICATIONS, MOBILE, RADIO RECEIVERS, FREQUENCY MODULATION, HTTS(HYBRID TROPO TRANSMISSION SYSTEM), HYBRID TROPOTRANSMISSION SYSTEM, AN/MRC-98, AN/TRC-97, AN/TRC-132, PE62702F, WURADC65230436, Text |
| URL: | |
| الإتاحة: | Open access content. Open access content Approved for public release; distribution is unlimited. |
| ملاحظة: | text/html English |
| أرقام أخرى: | DTICE ADA032000 832020011 |
| المصدر المساهم: | From OAIster®, provided by the OCLC Cooperative. |
| رقم الأكسشن: | edsoai.ocn832020011 |
| قاعدة البيانات: | OAIster |
| الوصف غير متاح. |