Verification work on "NETWORK" Option 8

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Uploaded: 29.10.2011
Content: 11029100438560.doc (704,5 kB)

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Objective 1

1. Draw a block diagram of an N - channel analog transmission systems with FDM SSB AM.
2. Calculate the lower and upper boundaries of the sidebands at the output of each individual channel modulators. Primary band signals is 0.3 ... 3.4 kHz and the carrier frequency (in kHz) for the lower frequency channel is indicated in Table 1. The channel bandpass filters select the useful sideband, shown in table 1.
3. Calculate and construct the spectral graph baseband N - channel multi-channel transmission system showing the boundaries of bands occupied by each channel.
4. On the block diagram, specify all the values \u200b\u200bcalculated.
Task 2

1. Draw a simplified block diagram of an N - channel PCM terminal DSP and the Military Revolutionary Committee. Provide a brief (one - two sentences) description of each circuit element.
2. Enter the steps of analog - digital signal conversion in the transmission path and digital - analog conversion path reception.
3. Select a frequency, and the sampling period of the signal spectrum is limited frequencies FH and FB.
4. For a given number of channels, build a timing diagram of the PAM signal group, pointing to chart the first three channel and the last channel. Input data are given in Table 2.
5. Perform a uniform quantization step Δ and coding in two symmetrical binary readout analog signal with the first three channels amplitudes U1, U2, U3 and UN last channel for a given transmission system. Determine the magnitude of distortion (error) quantization. Draw the resulting coding code words in the form of combinations of current and current-free premises, considering that the current corresponds to a binary one parcel, and zero - dead time.
Objective 3

1. For a given range of frequencies provide the main means of propagation of radio waves in this frequency range.
2. Determine the type of radio system is a block diagram of the selected radio systems and briefly describe the features of the transfer electrical signals in this system, the purpose of the circuit elements. Specify the number of transmitted channels, types of messages transmitted by the system.
3. Consider the features of transmitting and receiving antennas.
Task 4 ................................................................................. .21
Task 5 ................................................................................. .25
References .................................................................. ..32

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