Land Mobile Satellite Service (LMSS) channel simulator : An end-to-end hardware simulation and study of the LMSS communications links
- Sumida, J. T.
- May 1, 1984.
- Physical Description:
- 1 electronic document
- Additional Creators:
- Springett, J. C., Richter, P. H., and Salmasi, A. B.
- hdl.handle.net , Connect to this object online.
- Restrictions on Access:
- Unclassified, Unlimited, Publicly available.
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- The design and implementation of the Land Mobile Satellite Service (LMSS) channel simulator as a facility for an end to end hardware simulation of the LMSS communications links, primarily with the mobile terminal is described. A number of studies are reported which show the applications of the channel simulator as a facility for validation and assessment of the LMSS design requirements and capabilities by performing quantitative measurements and qualitative audio evaluations for various link design parameters and channel impairments under simulated LMSS operating conditions. As a first application, the LMSS channel simulator was used in the evaluation of a system based on the voice processing and modulation (e.g., NBFM with 30 kHz of channel spacing and a 2 kHz rms frequency deviation for average talkers) selected for the Bell System's Advanced Mobile Phone Service (AMPS). The various details of the hardware design, qualitative audio evaluation techniques, signal to channel impairment measurement techniques, the justifications for criteria of different parameter selection in regards to the voice processing and modulation methods, and the results of a number of parametric studies are further described.
- Other Subject(s):
- NASA Technical Reports Server (NTRS) Collection.
- Document ID: 19840019887.
Accession ID: 84N27956.
- No Copyright.
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