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Performance of wideband, non‐linearly amplified PAM cable systems
Author(s) -
Hatzinakos Dimitrios,
Feher Kamilo
Publication year - 1989
Publication title -
international journal of digital and analog cabled systems
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.344
H-Index - 49
eISSN - 1099-1131
pISSN - 0894-3222
DOI - 10.1002/dac.4520020104
Subject(s) - predistortion , wideband , amplifier , linearization , amplitude , power (physics) , phase (matter) , electronic engineering , computer science , decoding methods , physics , nonlinear system , telecommunications , optics , engineering , bandwidth (computing) , quantum mechanics
The performance of wide‐band non‐linearly amplified, i.e. power efficient, 2‐, 4‐, 8‐, 16‐ and 32‐level PAM digital cable systems is studied. The effect of amplitude and phase non‐linearities (AM to AM) and (AM to PM) on the error rate performance and on the received eye diagrams is analysed by computer simulations and experimentally. We demonstrate that significant performance improvement could be attained by means of predistortion linearization, prior to the transmit (high power) amplifier, and by simple modification of the threshold decoding levels in the receiver.