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Channel coding for the next generation communication system needs to support higher data throughput and transmission rate. Due to the inherent parallel feature, low density parity check (LDPC) codes comply with the target. In this paper, we propose a complete channel coding scheme based on structured LDPC codes. In our design, the correlation among different parity check matrices for different code...
In this paper, we propose a threshold-based one-bit soft forwarding (TOB-SF) protocol for a multi-source relaying system with network coding, where two sources communicate with the destination with the help of a relay. Specifically in the TOB-SF protocol, the relay calculates the log-likelihood ratio (LLR) value of each network coded symbol, compares this LLR value with a pre-optimized threshold,...
In this paper we propose a novel network coded LDPC code design for a multiple-access relay channel (MARC). We first investigate the achievable rate region for the MARC. Then we propose a novel physical layer network coded (PNC) LDPC code structure, named PNC-LDPC code. Next, an iterative detection-and-decoding receiver is designed to deal with the multi-user interference at the destination. Based...
In this work we determine the achievable rate in a multi-source relaying system with Gaussian phase-fading channels. In our system, M sources simultaneously transmit their messages to a common destination in M separate frequency bands with the help of a single relay (an M − 1 − 1 system). The achievable rates of both a separate processing scheme at the relay, and a network coding scheme at the relay,...
This paper proposes a joint source-channel coding (JSCC) scheme for unequal protection of SVC video coding over packet loss channels. The SVC sub-streams with different importance are unequally protected using Low Density Parity Check (LDPC) codes with five different coding rates respectively. The proposed JSCC scheme for SVC can optimize the rate allocation between source coding and channel coding...
This paper has presented a new constellation rearrangement (CoRe) theme for a good performance/complexity tradeoff if circular buffer rate matching (CBRM) is applied for incremental Hybrid ARQ (IR-HARQ) with turbo coding or LDPC coding. The presented technique is applied to high order modulation, such as 16QAM and 64QAM, with 2 versions. For all transmissions of one HARQ process, the previous half...
Channel coding for IMT-ADVANCED system needs to support higher data throughput and transmission rate. Due to the inherent encoder/decoder parallel feature, low density parity check (LDPC) codes is more suitable for hardware implementation than turbo codes when the data throughput is higher than 100 Mbps. As one of the contributors to Wimax LDPC and 3GPP2 LDPC, ZTE has funded some experience in the...
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