Total capacity in a shared CDMA LEOS environment

• Published in: IEEE journal on selected areas in communications Vol. 13; no. 2; pp. 232 - 244
• Main Authors: Vojcic, B.R., Milstein, L.B., Pickholtz, R.L.
• Format: Journal Article
• Language: English
• Published: IEEE 01.02.1995
• Subjects: Aggregates; Downlink; Error analysis; Fading (radio); Frequencies; Lasers and Electro-Optics Society; Low earth orbit satellites; Mobile communication; Mobile telecommunication systems; Multiaccess communication; Phase frequency detector; Probability; Rayleigh channels; Satellite broadcasting; Satellites; Shadow mapping; Signal to noise ratio; Telecommunication links; Transponders
• ISSN: 0733-8716; 1558-0008
• DOI: 10.1109/49.345867

We are interested in determining the feasibility of having multiple service providers share the same spectrum in transponder-type. Satellite-based, code-division multiple-access mobile communications. To accomplish this, we compare the total capacity when n systems are operational to that when only a single system uses the frequency band. This comparison is made for both the uplink and the downlink under one of two possible constraints, either a maximum power flux density (PFD) limit per system, or an aggregate PFD limitation. While there are circumstances when the total capacity of multiple systems can achieve a greater value than that of a single service provider, conditions depend on the degree of shadowing, and whether or not the PFD limit is on a per system basis or on an aggregate basis from all systems.< >