Laboratory exercise on demodulation of PAM signal

Willie Ofosu, James Garner, David Metz

Research output: Contribution to journalConference articlepeer-review

1 Scopus citations


Pulse amplitude modulation (PAM) is used extensively in telecommunications as an intermediate step of other techniques such as phase shift keying (PSK), quadrature amplitude modulation (QAM) and pulse code modulation (PCM) 1. PAM however is an amplitude modulated (AM) form of a pulse carrier2, and hence has all the advantages and disadvantages of the purely analog AM, a major disadvantage being noise. PAM can be time-division multiplexed (TDM), as can pulse code modulation (PCM) which is a digital signal. TDM is one of the multiplexing techniques used in telephony (the other is space-division multiplexing). PAM is used as a first step in converting voice signal to PCM in the public switched telephone network (PSTN), and is also used to produce high-level modulation schemes for data modems and digital radio. High-level modulation is done in the output circuit of the radio frequency (RF) power amplifier stage, and is more efficient than low-level modulation. PCM is used for long-distance telecommunications, making PAM an important pulse modulation technique in communications systems.

Original languageEnglish (US)
Pages (from-to)6685-6690
Number of pages6
JournalASEE Annual Conference Proceedings
StatePublished - 2001
Event2001 ASEE Annual Conference and Exposition: Peppers, Papers, Pueblos and Professors - Albuquerque, NM, United States
Duration: Jun 24 2001Jun 27 2001

All Science Journal Classification (ASJC) codes

  • General Engineering


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