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| Content Provider | IEEE Xplore Digital Library |
|---|---|
| Author | Tomlinson, A. Ambroze, A. Wade, G. |
| Copyright Year | 2002 |
| Description | Author affiliation: Dept. Commun. & Electron. Eng., Univ. of Plymouth, UK (Tomlinson, A.; Ambroze, A.) |
| Abstract | The objective of this project is to maximise the power and bandwidth efficiency of small satellite Earth communication terminals whose main limitation to satellite capacity is a nonlinear transmitting power amplifier. A form of envelope equalisation is presented in which regular QPSK modulation is used together with instantaneous data magnitude modulation so as to produce a near constant envelope signal when filtered with root 35% raised cosine filtering. The algorithm for deriving the magnitude values is presented along with results using a data lookup table approximation. Bit error rate figures are presented for envelope equalisation combined with a (4096,3249) binary product code and MAP decoding. It is shown that at 10/sup -6/ BER the E/sub b//N/sub 0/ is 3.52 dB, some 0.26 dB from the linear system. When used with a nonlinear power amplifier, the benefit of envelope equalisation is approximately 3 dB. The power spectrum is identical to that of the linear system with no spectral spreading and no increase in adjacent channel interference. |
| Starting Page | 2943 |
| Ending Page | 2946 |
| File Size | 436260 |
| Page Count | 4 |
| File Format | |
| ISBN | 0780374002 |
| DOI | 10.1109/ICC.2002.997379 |
| Language | English |
| Publisher | Institute of Electrical and Electronics Engineers, Inc. (IEEE) |
| Publisher Date | 2002-04-28 |
| Publisher Place | USA |
| Access Restriction | Subscribed |
| Rights Holder | Institute of Electrical and Electronics Engineers, Inc. (IEEE) |
| Subject Keyword | Bandwidth Modulation coding Satellite communication Artificial satellites Power amplifiers Bit error rate Linear systems Satellite ground stations Quadrature phase shift keying Filtering |
| Content Type | Text |
| Resource Type | Article |
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