Dobri Dobrev

Application of high order APSK modulations in satellite digital video broadcasting
Lidia T. Jordanova, Lyubomir B. Laskov, Dobri M. Dobrev

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In this paper are presented the results of a study of the characteristics of the DVB-S2 channels when using 32APSK and 64APSK modulation. Expressions for determining the probability of bit error after APSK demodulator, LDPC ...  read more

Transmission quality assurance in the design of HFC television network
Lidia T. Jordanova, Dobri M. Dobrev

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The paper deals with signal degradation due to noise and nonlinear distortion in the forward channel of HFC television network. A mathematical model of the optical channel is presented that makes it possible for the following ...  read more