scholarly journals Performance of combined constellation shaping and bit interleaved coded modulation with iterative decoding (BICM-ID)

2011 ◽  
Vol 9 ◽  
pp. 195-201 ◽  
Author(s):  
T. Arafa ◽  
W. Sauer-Greff ◽  
R. Urbansky
Keyword(s):  
Iterative Decoding ◽  
Communication Systems ◽  
Forward Error Correction ◽  
Coded Modulation ◽  
Bandwidth Utilization ◽  
Signal Constellation ◽  
High Data ◽  
Constellation Shaping ◽  
Forward Error ◽  
Bit Interleaved Coded Modulation

Abstract. The increasing demand of achieving high data rates in modern communication systems requires highly efficient bandwidth utilization. For this purpose, multilevel modulation schemes are used in association with forward error correction (FEC) codes in order to approach the channel capacity. However, there is a gap between the capacity of a uniform signal constellation and the Shannon unconstrained capacity. This gap can be reduced by applying constellation shaping. The task of shaping is to modify a uniform distributed signal constellation towards a Gaussian like distribution. In this paper, we investigate different approaches to combine the constellation shaping with a bit interleaved coded modulation with iterative decoding (BICM-ID) system. Simulation results show that this combination can offer a shaping gain up to 0.6 dB.

scholarly journals Hard-Decision Coded Modulation for High-Throughput Short-Reach Optical Interconnect

Entropy ◽  
2020 ◽  
Vol 22 (4) ◽  
pp. 400
Author(s):  
Bin Chen ◽  
Yi Lei ◽  
Gabriele Liga ◽  
Chigo Okonkwo ◽  
Alex Alvarado
Keyword(s):  
Communication Systems ◽  
Forward Error Correction ◽  
Additive White Gaussian Noise ◽  
Coded Modulation ◽  
Fiber System ◽  
Modulation Formats ◽  
High Data ◽  
Data Rates ◽  
Forward Error ◽  
Hard Decision

Coded modulation (CM), a combination of forward error correction (FEC) and high order modulation formats, has become a key part of modern optical communication systems. Designing CM schemes with strict complexity requirements for optical communications (e.g., data center interconnects) is still challenging mainly because of the expected low latency, low overhead, and the stringent high data rate requirements. In this paper, we propose a CM scheme with bit-wise hard-decision FEC and geometric shaping. In particular, we propose to combine the recently introduced soft-aided bit-marking decoding algorithm for staircase codes (SCCs) with geometrically-shaped constellations. The main goal of this CM scheme is to jointly boost the coding gain and provide shaping gain, while keeping the complexity low. When compared to existing CM systems based on M-ary quadrature-amplitude modulation (MQAM, M = 64 , 128 , 256 ) and conventional decoding of SCCs, the proposed scheme shows improvements of up to 0 . 83 dB at a bit-error rate of 10 - 6 in the additive white Gaussian noise channel. For a nonlinear optical fiber system, simulation results show up to 24 % reach increase. In addition, the proposed CM scheme enables rate adaptivity in single-wavelength systems, offering six different data rates between 450 Gbit/s and 666 Gbit/s.

scholarly journals Bit-interleaved coded modulation with iterative decoding using constellation shaping

2006 ◽  
Vol 54 (9) ◽  
pp. 1517-1520 ◽  
Author(s):  
Boon Kien Khoo ◽  
S.Y. Le Goff ◽  
B.S. Sharif ◽  
C.C. Tsimenidis
Keyword(s):  
Iterative Decoding ◽  
Coded Modulation ◽  
Constellation Shaping ◽  
Bit Interleaved Coded Modulation

THIẾT KẾ BỘ XÁO TRỘN CHO HỆ THỐNG BICM-ID TRUYỀN DẪN QUA KÊNH PHA ĐINH

2020 ◽  
pp. 59-68
Author(s):  
Thắng
Keyword(s):  
Iterative Decoding ◽  
Coded Modulation ◽  
Bit Interleaved Coded Modulation

Bài viết đề xuất một xáo bộ trộn bít (gọi là New-block) sử dụng trong hệ thống BICM-ID (Bit-Interleaved Coded Modulation with Iterative Decoding) trên kênh pha đinh Rayleigh. Nó mang lại cho hệ thống giá trị hiệu suất BER (Tỷ lệ lỗi bit) xấp xỉ với bộ xáo trộn bít giả ngẫu nhiên ở vùng sàn lỗi, nhưng có phần cứng đơn giản hơn.

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