On the Joint Optimization of Modulation and Channel Coding for High Data-Rate Optical Communication Systems

2011 ◽  
Author(s):  
Paolo Leoni ◽  
Stefano Calabrò ◽  
Berthold Lankl ◽  
Bernhard Spinnler
Keyword(s):  
Optical Communication ◽  
Channel Coding ◽  
Communication Systems ◽  
Data Rate ◽  
High Data Rate ◽  
Joint Optimization ◽  
High Data ◽  
Optical Communication Systems

scholarly journals 0.13 μm CMOS Traveling-Wave Power Amplifier with On- and Off-Chip Gate-Line Termination

Electronics ◽  
2020 ◽  
Vol 9 (1) ◽  
pp. 133
Author(s):  
Aleksandr Vasjanov ◽  
Vaidotas Barzdenas
Keyword(s):  
Optical Communication ◽  
Traveling Wave ◽  
Communication Systems ◽  
Building Blocks ◽  
Power Added Efficiency ◽  
High Data ◽  
Operating Frequency Range ◽  
Measurement Results ◽  
Optical Communication Systems ◽  
On Chip

Broadband amplifiers are essential building blocks used in high data rate wireless, radar, and instrumentation systems, as well as in optical communication systems. Only a traveling-wave amplifier (TWA) provides sufficient bandwidth for broadband applications without reducing modern linearization techniques. TWA requires gate-line and drain-line termination, which can be implemented on- and off-chip. This article compares the performance of identical 0.13 μm CMOS TWAs, differing only in gate-line termination placement. Measurement results revealed that the designed TWAs with on- and off-chip termination have a bandwidth of 10 GHz with a maximum gain of 15 dB and a power-added efficiency (PAE) of 5%–22% in the whole operating frequency range. Placing the gate-line termination off-chip results in an S21 flatness reduction, compared to the gain of a TWA with on-chip termination. Gain fluctuation over frequency is reduced by 4–8 dB when the termination resistor is placed as an external circuit.

A Novel Multiplexing Method for High Data Rate Communication Systems

2006 ◽  
Author(s):  
Yassin Elhillali ◽  
Charles Tatkeu ◽  
Atika Rivenq ◽  
J. Rouvaen
Keyword(s):  
Communication Systems ◽  
Data Rate ◽  
High Data Rate ◽  
High Data
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