| 1. | This amounts to PCM ( pulse code modulation ) with digitization performed by a sigma-delta ADC.
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| 2. | The lowpass signals are then quantized and encoded using special techniques like, Pulse Code Modulation ( PCM ).
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| 3. | The fixed infrastructure method is proving popular on high-density passenger lines where pulse code cab signaling has already been installed.
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| 4. | Starting in the late 1920s, the PRR installed Pulse code cab signaling along certain tracks used by high-speed passenger trains.
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| 5. | It uses sub-band adaptive differential pulse code modulation ( SB-ADPCM ) within a bit rate of 64 kbit / s.
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| 6. | He also worked on pulse code modulation and wrote a book on " Modulation Theory " ( Van Nostrand, 1953 ).
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| 7. | Pulse code cab signals work by sending metered pulses along an existing AC track circuit operating at some chosen carrier frequency.
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| 8. | PATCO trains are governed by a Pulse code cab signaling system which transmits signal codes to the trains via the running rails.
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| 9. | In this system permutation matrices were used to scramble coded representations ( such as Pulse Code Modulation and variants ) of the speech data.
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| 10. | It also has applications in pulse code modulation as a pulse shape for transmitting digital signals and as a matched filter for receiving the signals.
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