Name
Abstract | ||
|---|---|---|
This paper describes a CDM/CDMA based approach for a 3-rd generation multi-beam satellite mobile and personal communications system using Highly Elliptical Orbit (HEO) satellites. The forward link uses a synchronous CDM intrabeam/asynchronous CDM inter-beam approach, while the return link uses a quasi-synchronous CDMA intra-beam/asynchronous CDMA inter-beam approach. Using probabilistic analysis, these approaches are shown to provide higher forward and return link capacities than equivalently synchronized FDM/FDMA approaches. Forward link transmissions are modulated using QPSK. Return link transmissions are modulated using either pi/4-QPSK or precompensated frequency modulation (PFM4). PFM4 is intended for use with a saturated amplifier in low-cost/power-efficient, e.g. hand-held, terminals, and can be demodulated using a pi/4-QPSK receiver. All forward and return link transmissions are coded using a rate 1/2, constraint length 9, convolutional code. The paper summarizes several key tradeoffs and the resulting system design. |
Year | DOI | Venue |
|---|---|---|
1998 | 10.1002/ett.4460090408 | EUROPEAN TRANSACTIONS ON TELECOMMUNICATIONS |
Keywords | Field | DocType |
system design | Quadrature modulation,Asynchronous communication,Synchronization,Convolutional code,Computer science,Communications system,Electronic engineering,Code division multiple access,Time division multiple access,Phase-shift keying | Journal |
Volume | Issue | ISSN |
9 | 4 | 1120-3862 |
Citations | PageRank | References |
4 | 0.94 | 10 |
Authors | ||
6 | ||
Name | Order | Citations | PageRank |
|---|---|---|---|
| Bob Lyons | 1 | 4 | 0.94 |
| Brian Mazur | 2 | 4 | 0.94 |
| John Lodge | 3 | 4 | 0.94 |
| Michael Moher | 4 | 4 | 0.94 |
| Stewart Crosier | 5 | 4 | 0.94 |
| Lars Erup | 6 | 13 | 3.05 |