A PLATFORM FOR LDPC CODE DESIGN AND PERFORMANCE EVALUATION
Alghonaim, Esa . 2010
In this paper, the design and implementation aspects of a novel platform for aiding in the construction and
performance evaluation of Low Density Parity Check (LDPC) codes is presented. The proposed platform is capable
of performing two major tasks: (1) parallel simulation for evaluating LDPC codes performance in a very short time
compared to existing LDPC code simulation tools, and (2) displaying the internal state of LDPC decoder during
decoding iterations using a graphical user interface (GUI) which allows the LDPC code designer to visually inspect
the weak areas. The existing LDPC code simulation tools take a long time in evaluating the performance of a
specific LDPC code design, particularly in high SNR regions. This is due to the large number of computations
required. This problem is overcome by developing a parallel protocol to distribute the computations among
processing nodes in a TCP/IP network. As indicated by experimental results, the proposed simulation platform is
scalable with the number of processing nodes. Another practical advantage of the proposed system is that it does not
need dedicated processors; rather, it can utilize idle times of processing nodes in a network and work transparently to
any node user. Furthermore, network daemons are adopted in order to detect and utilize network nodes even if they
are in the log-off state. The second major task of the proposed platform is to analyze LDPC code performance and
inspect weak areas in a given LDPC code design. To meet this objective, a method is proposed to graphically display
the behavior of the LDPC decoder through the decoding iterations. This is then exploited to detect weak
constructions (such as failure “trapping loops”) that prevent the decoder from continuously improving the bit error
performance.
The paper presents a novel approach to reduce the bit error rate (BER) in iterative belief propagation (BP) decoding of low density parity check (LDPC) codes.
This paper presents a novel approach for the design and implementation of a simulation platform for evaluating LDPC codes performance. The existing LDPC code simulation tools consume very long…
The paper presents a novel approach to increase the performance and/or throughput of iterative belief propagation (BP) decoding of low density parity check (LDPC) codes. The proposed approach is…