THE DIGITAL AMPLITUDE MODULATOR

Timothy P. Hulick, Ph.D., W9QQ
886 Brandon Lane
Schwenksville, PA 19473


Abstract.
This paper is the first of two presenting the Digital Amplitude Modulator and the Digital Linear Amplifier. One leads to the other with the Digital Amplitude Modulator the precursor and the first theorized. Linear amplitude modulation in very high power full carrier systems still requires rather large solid state or vacuum tube devices in Medium Wave (MW) and Short Wave (SW), telephone and VHF and UHF ....etc

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Matched Filtering and Digital Pulse Amplitude Modulation (PAM

Outline

Transmitting one bit at a time
Matched filtering
PAM system
Intersymbol interference
Communication performance
Bit error probability for binary signals
Symbol error probability for M-ary (multilevel) signals
Eye diagram
....etc

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Amplitude &Frequency Modulation



Modulation Methods

In the modulation process, some characteristic of a high-frequency
sinusoidal carrier is changed in direct proportion to the instantaneous
amplitude of the baseband signal. The carrier itself can be
described by the equation


Zero Span and Markers


One possibility, if the percent modulation is high enough, is
to use the analyzer as a fixed-tuned receiver, demodulate
the signal using the envelope detector ....etc

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This paper seeks to present ways to eliminate the inherent quantization noise component in digital communications, instead of conventionally making it minimal. It deals with a new concept of signaling called the Signal Code Modulation (SCM) Technique. The primary analog signal is represented by: a sample which is quantized and encoded digitally, and an analog component, which is a function of the quantization component of the digital sample.




The advantages of such a system are two sided offering advantages of both analog and digita ....etc

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This paper seeks to present ways to eliminate the inherent quantization noise component in digital communications, instead of conventionally making it minimal. It deals with a new concept of signaling called the Signal Code Modulation (SCM) Technique. The primary analog signal is represented by: a sample which is quantized and encoded digitally, and an analog component, which is a function of the quantization component of the digital sample. The advantages of such a system are two sided offering advantages of both analog and digital signaling. ....etc

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top 10 viva question on amplitude shift keying
top 10 viva wuetion for amplitude shift keying ....etc

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This paper seeks to present ways to eliminate the inherent quantization noise component in digital communications, instead of conventionally making it minimal. It deals with a new concept of signaling called the Signal Code Modulation (SCM) Technique. The primary analog signal is represented by: a sample which is quantized and encoded digitally, and an analog component, which is a function of the quantization component of the digital sample. The advantages of such a system are two sided offering advantages of both analog and digital signaling. ....etc

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