Dissertation/ Thesis
ON THE PERFORMANCE OF PCM/FM+ FM/FM SYSTEMS
| العنوان: | ON THE PERFORMANCE OF PCM/FM+ FM/FM SYSTEMS |
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| المؤلفون: | Osborne, William P., Whiteman, Don, Ara, Sharmin |
| Thesis Advisors: | New Mexico State University |
| بيانات النشر: | International Foundation for Telemetering, 1993. |
| سنة النشر: | 1993 |
| المجموعة: | University of Arizona |
| Original Material: | International Telemetering Conference Proceedings |
| مصطلحات موضوعية: | PCM, FM, Demodulation, Power Spectrum |
| الوصف: | International Telemetering Conference Proceedings / October 25-28, 1993 / Riviera Hotel and Convention Center, Las Vegas, Nevada Much modem telemetry is transmitted in a digital format and to be compatible with existing range equipment the digital data is impressed on the carrier using FM modulation. The receiving system in common use employs an FM limiter/discriminator as a detector followed by an integrate and dump matched filter for bit detection. This system has been studied by previous authors [1] and it is well known that in the absence of frequency uncertainty the optimum transmission parameters consist of a modulation index of .7 (peak-to-peak deviation divided by the bit rate) and an IF filter bandwidth equal to the bit rate followed by a limiter discriminator. In many cases, there is a need for some small amount of analog telemetry transmission in addition to the digital data discussed above. In these cases it is common practice to include analog subcarriers on the main carrier with the digital data modulating the carrier at baseband, the resulting system is called PCM/FM + FM/FM. These hybrid analog/digital systems are the subject of this paper. In particular this paper addresses the performance of these systems through simulation using the Block Oriented System Simulator (BOSS) from Comdisco and with analytical techniques to obtain the BER versus SNR curves for these systems. The simulation is used over a wide range of parameters to find the optimum values of modulation index and IF bandwidth for these systems. |
| Original Identifier: | oai:arizona.openrepository.com:10150/608872 |
| نوع الوثيقة: | Proceedings Text |
| تدمد: | 0884-5123 0074-9079 |
| Relation: | http://www.telemetry.org/ |
| الاتاحة: | http://hdl.handle.net/10150/608872 http://arizona.openrepository.com/arizona/handle/10150/608872 |
| Rights: | Copyright © International Foundation for Telemetering |
| رقم الانضمام: | edsndl.arizona.edu.oai.arizona.openrepository.com.10150.608872 |
| قاعدة البيانات: | Networked Digital Library of Theses & Dissertations |
| تدمد: | 08845123 00749079 |
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