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Performance Evaluation Criteria of Hybrid Microwave Systems

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3 Author(s)
Feher, K. ; RCA Limited, Montreal, P.Q., Canada ; Goulet, R. ; Morissette, S.

Performance evaluations and measurement principles of hybrid information carriers, that is, carriers for partly analog and partly digital source infomation, are established. Simulation requirements, which are independent from a particular hybrid configuration or system capacity, for the analog and digital sources are presented. In order to perform the analysis of multilevel digital streams, a simple formula for the power spectrum density of the randomn-level Gray-coded stream is derived. With normalization of the formula, the same power density spectrum for any number of levels is achieved. The required length of the pseudorandom sequence as a function of the transmission characteristics and hybrid environment is established. The measurement difficulties, when the noise source is not Gaussian, are discussed.

Published in:

Communications, IEEE Transactions on  (Volume:22 ,  Issue: 6 )

Date of Publication:

Jun 1974

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