Performance of a quasi synchronous code division multiple access signal interfered by FM-television
✍ Scribed by Colcy, J. N. ;De Martino, R. ;Meyer, S.
- Publisher
- John Wiley and Sons
- Year
- 1997
- Tongue
- English
- Weight
- 128 KB
- Volume
- 15
- Category
- Article
- ISSN
- 0737-2884
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✦ Synopsis
This paper presents the results obtained in computer simulations and laboratory measurements of interference caused by FM-TV signals to band limited quasi synchronous code division multiple access (BLQS-CDMA) signals. Certain parameters, such as frequency spacing between wanted and interfering carriers and type of modulating TV signal (75 per cent saturated colour bar or saturated red field), were varied during the measurements and simulations, in order to study their influence on the amount of interference suffered by the BLQS-CDMA signal.
Computer simulations were validated by hardware measurements, in order to have available an inhouse software tool for future analyses.
Protection ratio (PR) masks have been obtained and show that BLQS-CDMA is well adapted to a VSAT network operating in an FM-TV interference environment.