Rate-Adaptive Irregular QC-LDPC Codes from Pairwise Balanced Designs for Ultra-High-Speed Optical Transport

CLEO: 2013 ◽  
2013 ◽  
Author(s):  
Ivan B. Djordjevic ◽  
Ting Wang
Keyword(s):  
High Speed ◽  
Ldpc Codes ◽  
Ultra High Speed ◽  
Pairwise Balanced Designs ◽  
Balanced Designs ◽  
Rate Adaptive ◽  
Optical Transport

LDPC Coded 2m-ary QAM for Ultra High Speed Communications

2015 ◽  
Vol 781 ◽  
pp. 45-48
Author(s):  
Sawitree Wongroekdee ◽  
Kosin Chaiprathum ◽  
Virasit Imtawil ◽  
Puripong Suthisopapan
Keyword(s):  
Bit Error Rate ◽  
Error Rate ◽  
Communication Systems ◽  
High Speed ◽  
Ldpc Codes ◽  
Bandwidth Efficiency ◽  
Reliable Transmission ◽  
Ultra High Speed ◽  
Qam Modulation ◽  
Bandwidth Expansion

Modern communication systems that employ LDPC codes and QAM modulation can achieve high speed and reliable transmission without bandwidth expansion. In this paper, the performances of LDPC codes with 2m- ary QAM at m>10, which can provide enormous bandwidth efficiency, are studied. Bit error rate performances of various combinations of LDPC codes and order of QAM are provided. From the results, the performance of LDPC coded ultra-high order QAM is excellent making this system very attractive for ultra-high speed communications.

Optimized signal constellations for ultra-high-speed optical transport

2015 ◽  
Author(s):  
Shaoliang Zhang ◽  
Tao Liu ◽  
Yequn Zhang ◽  
Fatih Yaman ◽  
Ivan B. Djordjevic ◽  
...  
Keyword(s):  
High Speed ◽  
Ultra High Speed ◽  
Signal Constellations ◽  
Optical Transport
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