Speech Processing, Squelch, and Noise Blanking

Speech Processing, Squelch, and Noise Blanking

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The human voice does not utilize the SSB power amplifiers very well. The 15-dB peak-to-average ratio, or 24-dB dynamic range, means that a high power amplifier that handles the peaks well is just 'loafing' most of the time. Unless the amplifier and power supply are marginal, much greater power can be transmitted if the deficiencies of speech can be improved. The usual case is that amplifiers that will handle the peaks well are capable of higher average levels than natural speech provides. The central idea is that the weaker components which we will emphasize in this section contribute much to the intelligibility.

Chapter Contents:

  • 7.1 Speech Processing
  • 7.2 Squelch
  • 7.3 Noise Blanking
  • References

Inspec keywords: speech processing; power amplifiers

Other keywords: SSB power amplifiers; noise blanking; power supply; speech processing; squelch; high power amplifier

Subjects: Amplifiers; Speech processing techniques; Speech and audio signal processing

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