Cyclostionary Spectral Analysis of Typical Satcom Signals using the FFT Accumulation Method,
DEFENCE RESEARCH ESTABLISHMENT OTTAWA (ONTARIO)
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The suitability of cyclostationary spectral analysis for the detection and identification of typical Satcom signals is examined. An overview of the general equations for cyclostationary spectral analysis is presented. The cyclic spectrum is derived for some common Satcom modulation schemes. Cyclic spectrum estimation techniques are described with particular emphasis on the time smoothed approach. Key aspects of a computationally efficient algorithm for computing the cyclic spectrum estimates, called the Fast Fourier Transform FFT Accumulation Method FAM are outlined. The FAM algorithm is implemented on a Digital Signal ProcessorPersonal Computer DSPPC board containing a TMS32Oc51 processor chip and used to compute the cyclic spectrum for various phase shift keyed PSK and spread spectrum waveforms. The results are presented and discussed.
- Radio Communications