What technique does DSP use to double the number of channels by using helical antennas?(a) Spatial isolation(b) Frequency reuse(c) Multiplexing(d) ModulationI had been asked this question during an interview.This interesting question is from Satellite Applications topic in division Satellite Communication of Avionics

What technique does DSP use to double the number of channels by using

1.	What technique does DSP use to double the number of channels by using helical antennas?(a) Spatial isolation(b) Frequency reuse(c) Multiplexing(d) ModulationI had been asked this question during an interview.This interesting question is from Satellite Applications topic in division Satellite Communication of Avionics
Answer» Correct OPTION is (b) Frequency reuse The explanation is: The digital SIGNAL is transmitted from the satellite to the receivers using circular polarization. The DBS satellites have right-hand and left-hand circularly polarized (RHCP and LHCP) helical antennas. By TRANSMITTING both polarities of signal, frequency reuse can be incorporated to double the channel CAPACITY.

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