scholarly journals Coded Modulation and Impairment Compensation Techniques in Optical Fiber Communication

2021 ◽  
Author(s):  
Zhipei Li ◽  
Dong Guo ◽  
Ran Gao
Keyword(s):  
Optical Fiber ◽  
Communication Systems ◽  
High Speed ◽  
Transmission Rate ◽  
Optical Fiber Communication ◽  
Coded Modulation ◽  
Coherent Detection ◽  
Modulation Scheme ◽  
Fiber Communication ◽  
Modulation Format

This chapter deals with coded modulation and impairment compensation techniques in optical fiber communication. Probabilistic shaping is a new coded modulation technology, which can reduce transmission power by precoding, reduce bit error rate and improve communication rate. We proposed a probabilistic shaping 16QAM modulation scheme based on trellis coded modulation. Experimental results show that this scheme can achieve better optical SNR gain and BER performance. On the other hand, in order to meet the demand of transmission rate of next generation high speed optical communication systems, multi-dimensional modulation and coherent detection are sufficiently applied. The imperfect characteristics of optoelectronic devices and fiber link bring serious impairments to the high baud-rate and high order modulation format signal, causes of performance impairment are analyzed, pre-compensation and receiver side’s DSP techniques designed for coherent systems are introduced.

On Application of LDPC Coded Modulation in Optical Fiber Communication

2012 ◽  
Vol 605-607 ◽  
pp. 1980-1983
Author(s):  
Zhong Xun Wang ◽  
Peng Xiang Wang
Keyword(s):  
Optical Fiber ◽  
Forward Error Correction ◽  
Ldpc Codes ◽  
Optical Fiber Communication ◽  
Coded Modulation ◽  
Modulation Scheme ◽  
Fiber Communication ◽  
Modulation Format ◽  
Simulation Results ◽  
Forward Error

In order to meet the demand for higher capacity transmission over optical fiber communication, we propose a new LDPC coded modulation scheme. Using spectrally-efficient modulation format and LDPC codes, the proposed scheme offers an advanced forward error correction (FEC) solution. From the simulation results, we can get the SNR at the bit error rate (BER) of 10-7 as 3.8dB, 5.5dB, and6.9dB when 16-, 32-, and 64-points constellations are used, respectively.

Study on the polarization scrambling time for ultra-high-speed optical fiber communication systems

2009 ◽  
Author(s):  
Nan Jia ◽  
Tangjun Li ◽  
Kangping Zhong ◽  
Taorong Gong ◽  
Dan Lu ◽  
...  
Keyword(s):  
Optical Fiber ◽  
Communication Systems ◽  
High Speed ◽  
Optical Fiber Communication ◽  
Fiber Communication ◽  
Ultra High Speed

scholarly journals Investigation of Ber Performances in Chaotic-Secured Optical Fiber Communication Systems using the 4-PAM Modulation Scheme

2021 ◽  
Vol 19 (6.2) ◽  
pp. 33
Author(s):  
Vu Anh Dao ◽  
Tran Thi Thanh Thuy ◽  
Truong Cao Dung ◽  
Nguyen Xuan Quyen
Keyword(s):  
Optical Fiber ◽  
Communication Systems ◽  
Optical Fiber Communication ◽  
Pulse Amplitude ◽  
Modulation Scheme ◽  
Pulse Amplitude Modulation ◽  
Bit Rate ◽  
Fiber Communication ◽  
Fiber Channel ◽  
Simulation Results

This paper presents a numerical simulation investigation on the bit error rate in a chaotic-secured fiber channel and a conventional fiber channel when propagating independently. The investigated communication system uses the pulse-amplitude modulation scheme (4-PAM) at the bit rate of 10 Gbps, the fiber length of 100 km, and the operation wavelength of 1550 nm. Our simulation results demonstrate both chaotic and non-chaotic transmission channels can well operate with the bit rate up to 20 Gbps with the BER smaller than 10-5 if dispersion and fiber loss issues are appropriately compensated without needing forwarderror-correction, showing high potential in physically secured optical fiber communication systems.

Sign in / Sign up

Export Citation Format

Share Document