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Independent sideband transmission places

  • A.A different message on each sideband
  • B.The same message on both sidebands, for redundancy against fading
  • C.A pilot carrier in each sideband
  • D.The message on one sideband and its inverse on the other

Answer: A

Independent sideband uses the two halves of a double-sideband channel to carry two separate messages, doubling the traffic in the same bandwidth. It was widely used on high-frequency point-to-point circuits. Duplicating one message is what ordinary DSB does and wastes half the capacity. A pilot in each sideband is a possible refinement rather than the definition. And transmitting an inverse would convey nothing extra.

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