Transmission over 9,100 km with a Capacity of 49.3 Tb/s Using Variable Spectral Efficiency 16 QAM Based Coded Modulation

2014 ◽  
Author(s):  
J.-X. Cai ◽  
H. Zhang ◽  
H. G. Batshon ◽  
M. Mazurczyk ◽  
O. V. Sinkin ◽  
...  
Keyword(s):  
Spectral Efficiency ◽  
Coded Modulation

scholarly journals Superposition Coded Modulation Based Faster-Than-Nyquist Signaling

2018 ◽  
Vol 2018 ◽  
pp. 1-10 ◽  
Author(s):  
Shuangyang Li ◽  
Baoming Bai ◽  
Jing Zhou ◽  
Qingli He ◽  
Qian Li
Keyword(s):  
Bit Error Rate ◽  
Spectral Efficiency ◽  
Detection Method ◽  
Signal To Noise Ratio ◽  
Coded Modulation ◽  
Signal To Noise ◽  
Data Rates ◽  
Orthogonal Signaling ◽  
Simulation Results ◽  
Constrained Capacity

A structure of faster-than-Nyquist (FTN) signaling combined with superposition coded modulation (SCM) is considered. The so-called FTN-SCM structure is able to achieve the constrained capacity of FTN signaling and only requires a low detection complexity. By deriving a new observation model suitable for FTN-SCM, we offer the power allocation based on a proper detection method. Simulation results show that, at any given spectral efficiency, the bit error rate (BER) curve of FTN-SCM lies clearly outside the minimum signal-to-noise ratio (SNR) boundary of orthogonal signaling with a larger alphabet. The achieved data rates are also close to the maximum data rates of the certain shaping pulse.

scholarly journals Spectral Efficiency Improved 2D-PAM8 Trellis Coded Modulation for Short Reach Optical System

2017 ◽  
Vol 9 (4) ◽  
pp. 1-8 ◽  
Author(s):  
Yan Fu ◽  
Meihua Bi ◽  
Da Feng ◽  
Xin Miao ◽  
Hao He ◽  
...  
Keyword(s):  
Optical System ◽  
Spectral Efficiency ◽  
Coded Modulation ◽  
Trellis Coded Modulation ◽  
Trellis Coded
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