A single-frequency network or SFN is a broadcast network where several transmitters simultaneously send the same signal over the same frequency channel.
Read more about Single-frequency Network: Overview, OFDM and COFDM, DVB-T SFN, ATSC and 8VSB, Alternative Modulations
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“Parents need all the help they can get. The strongest as well as the most fragile family requires a vital network of social supports.”
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