Showing papers by "Hung-Chang Chien published in 2020"
ZTE1
TL;DR: FPGA emulations reveal soft-decision LDPC code offers more than 1.5dB coding gain with no error floor, and performance down to 10−15 BER of hard- Decision 25G-PON LDPC and soft-Decision 50G-pon LDPC at a record 90-Gbps throughput is investigated.
Abstract: Employing 75-piece FPGA implementation, we investigate the performance down to 10−15 BER of hard-decision 25G-PON LDPC and soft-decision 50G-PON LDPC at a record 90-Gbps throughput. FPGA emulations reveal soft-decision LDPC code offers more than 1.5dB coding gain with no error floor.
3 citations
ZTE1
TL;DR: C4-256 four-dimensional 8-bit modulation with non-binary FEC is firstly proposed and demonstrated for coherent optical transmissions, which outperforms its PM-16QAM counterpart by 0.7-dB for required OSNR at 10−8 post-FEC BER.
Abstract: C4-256 four-dimensional 8-bit modulation with non-binary FEC is firstly proposed and demonstrated for coherent optical transmissions, which outperforms its PM-16QAM counterpart by 0.7-dB for required OSNR at 10−8 post-FEC BER.
1 citations
ZTE1
TL;DR: The FEC implementations employing high-throughput FPGA emulations from the aspects of decoding buffer size, fixed-point scale factor, and error floor elimination are optimized.
Abstract: We review FEC options for short-reach optical transmissions including staircase code, concatenated staircase and Hamming code, QC-LDPC code, and LDPC convolution code. We optimize the FEC implementations employing high-throughput FPGA emulations from the aspects of decoding buffer size, fixed-point scale factor, and error floor elimination.
Patent•
ZTE1
TL;DR: In this article, an optical signal transmitter system in an optical communication network includes a digital pre-emphasis device structured to generate a preemphasized digital data signal by pre-emphasizing at least a portion of a digital signal to be transmitted.
Abstract: An optical signal transmitter system in an optical communication network includes a digital pre-emphasis device structured to generate a pre-emphasized digital data signal by pre-emphasizing at least a portion of a digital data signal to be transmitted, a digital-to-analog converter coupled to the digital pre-emphasis device to convert the pre-emphasized digital data signal into an analog data signal, an analog pre-emphasis device coupled to the digital-to-analog converter to generate a pre-emphasized analog data signal by pre-emphasizing at least a portion of the analog data signal, an electrical-to-optical converter to convert the pre-emphasized analog signal into an optical signal, and a processor configured to determine a pre-emphasis assignment distribution between the digital pre-emphasis device and the analog pre-emphasis device.