Abstract
Low-density parity-check code (LDPC) not only has good performance approaching the Shannon limit, but also has low decoding complexity and flexible structure. It is a research hot-spot in the field of channel coding in recent years and has a wide range of application prospects in optical communication systems. In this paper, the decoding aspects and performance of LDPC codes are analyzed and compared according to the bit error rate (BER) of LDPC codes. The computer simulation was carried out under additive white Gaussian noise (AWGN) channel and binary phase shift keying (BPSK) modulation. Through theoretical analysis and simulation results, this paper explores the way of multi-rate LDPC decoding.
Highlights
Since the end of the 20th century, with the development and growth of the Internet, people’s demand for data services is increasing, such as online video, audio, game entertainment and other multimedia services
Through theoretical analysis and simulation results, this paper explores the way of multi-rate Low-density parity-check code (LDPC) decoding
When the code length or code rate of the LDPC code is smaller, it corresponds to fewer storage units in the hardware structure, that is to say, the total number of storage units in the figure is r ⋅ c, and the storage units involved in the actual decoding process is not more than m ⋅ n ( m < r, n < c )
Summary
Since the end of the 20th century, with the development and growth of the Internet, people’s demand for data services is increasing, such as online video, audio, game entertainment and other multimedia services. How to improve the capacity and speed has become an urgent task. There are two effective methods to improve the data bandwidth: one is through high-order phase modulation; the other is through channel multiplexing technology. As the modulation order increases and the channel multiplexing density increases, the transmission distance of high-speed optical fiber communication systems will be severely limited, which is manifested in the increase of the BER in the information. LDPC code is a kind of linear block code invented by R. LDPC code is more suitable for large capacity communication system. The rate of LDPC code is adjustable and flexible in practical application. Multi-rate LDPC decoding in optical communication system has important theoretical and application value [2]
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
