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1) A communication system has a bandwidth of B- 2MHz and capacity of C-10Mbs/s. What is the SNR is dB? 2) For the system with

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1) A communication system has a bandwidth of B- 2MHz and capacity of C-10Mbs/s. What is the SNR is dB? 2) For the system with the same bandwidth, which of the following modulation schemes can be 10Mbs/s? The modulation schemes adopted to achieve the same or higher capacity of C include BPSK, QPSK, 16QAM and 64QAM. 3) Analog voice signals are normally normalized at a sample rate of 8KSPS and each sample takes 8 bits. How many digitized voice channels it can then accommodate with

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