Spectrum Simulation of Continuous Phase Modulation Signals
| Autor: | Chun-Lai Dai, 戴春來 |
|---|---|
| Rok vydání: | 2009 |
| Druh dokumentu: | 學位論文 ; thesis |
| Popis: | 97 In this thesis, the spectra of continuous phase modulated signals (CPM) are simulated. Since CPM signals have been extensively discussed in the field ofcommunications, due to CPM signals have properties of phase continuity, constant envelope, narrow frequency spectrum and a fast roll-off side-lobe. To keep phase continuity in the transmitted signals, CPM has memory inherently and the modulators are deployed with Viterbi algorithm to achieve coding gains. To compute the power spectra of general continuous phase modulation signals,many approaches have been proposed in the literature. The best known approaches are based either on the direct method of Anderson and Salz or on the autocorrelation method of Aulin and Sundberg [2]. In this thesis, we proposed an alternative power spectral density formula [1] and compare to the results in [2]. It is concluded that this two approaches are essentially equivalent. |
| Databáze: | Networked Digital Library of Theses & Dissertations |
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