High-Speed Two-Parallel Concatenated BCH-Based Super-FEC Architecture for Optical Communications

Abstract

This paper presents a high-speed Forward Error Correction (FEC) architecture based on concatenated Bose-Chaudhuri-Hocquenghem (BCH) for 100-Gb/s optical communication systems. The concatenated BCH code consists of BCH(3860, 3824) and BCH(2040, 1930), which provides 7.98 dB net coding gain at 10 −12 corrected bit error rate. The proposed BCH decoder features a low-complexity key equation solver using an error-locator computation RiBM (ECRiBM) algorithm and its architecture. The proposed concatenated BCH-based Super-FEC architecture has been implemented in 90-nm CMOS standard cell technology with a supply voltage of 1.1 V. The implementation results show that the proposed architecture can operate at a clock frequency of 400 MHz and has a throughput of 102.4-Gb/s for 90-nm CMOS technology.

A high-performance concatenated BCH code and its hardware architecture for 100 Gb/s long-haul optical communications

“…This technique can improve the error correction capability without decreasing the code rate. The I.3-CBCH decoder for 100 Gb/s OTN was proposed in [3]. However, when implementing a concatenated decoder, iterations are unfolded to process a continuous data stream.…”

“…However, when implementing a concatenated decoder, iterations are unfolded to process a continuous data stream. Therefore the hardware complexity of the concatenated BCH decoder in [3] was quite high.…”

“…With the B-format OTN frame structure, two-parallel processing of encoding and decoding is possible. Detailed structure of A and B-format is described in [3][4]. After converted, each B-format frame is processed in the outer encoder and it aligned into 8 BCH(3920,3824) codewords, as shown in Fig.…”

“…Both the inner and outer decoder processes 256 bits per one clock cycle. Detailed architectures of the sub-blocks are described in [3][4].…”

Design And Implementation of An Ultra-Low Power Bose Chaudhuri Hocquenghem Encoding Based Body Channel Communication For Medical Applications

“…This growth is expected to continue in the future and soon the average human will have multiple interconnected wearables on his/her body [15]. With everyone carrying a signi cant amount of information on-body, people will seek to exchange them in a secure manner creating a human body area network (BAN) [16,17]. Such BANs will require energy-e cient and secure ways for these wearable devices to communicate.…”