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DVB-C modulator transmission principle

Release time:2017-05-09
      DVB-C modulator for cable channels.

      Cable channel features are: high signal to noise ratio, narrow band resources, there are echo and nonlinear distortion. DVB-C uses a narrow bandwidth, high band utilization, anti-interference ability of the modulation. At the same time, due to the high signal to noise ratio, bit error rate is low, error correction capability is not very high. Therefore, DVB-C channel part of the RS code and convolutional code interleaving technology, quadrature amplitude modulation (QAM). QAM can be said to be a complex model of QPSK, when the modulation signal phase and amplitude are changed when the formation of a phase constellation.

Related tags:DVB-C modulator,

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