DVB‐S2 low density parity check codes with near Shannon limit performance

Eroz, Mustafa; Sun, Feng-Wen; Lee, Lin-Nan

doi:10.1002/sat.787

Cited by 111 publications

(79 citation statements)

References 6 publications

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“…We used the LDPC code with an information length of 16,200 bits and a code rate of 1/2. The min-sum product algorithm with a correction factor was used [10]. The maximum iterations of the LDPC decoding was set to 10, and the number of iterations between the LDPC decoder and PIC-MMSE detector was set to 4.…”

Section: Simulation Resultsmentioning

confidence: 99%

Soft Iterative Linear Detection for LDPC Coded MIMO Scheme with PSK

Zhang¹,

Kim²

2017

IJCNS

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A number of study results demonstrated that the performance of the coded MIMO scheme can be highly enhanced by incorporating iterative decoding and detection scheme by exchanging soft information between the symbol detector and decoder. One of the critical problems of these iterative schemes is an exponential order of the complexity with increase of number of bits in a symbol and the number of antennas. In this paper, we present an efficient iterative detection and decoding scheme for MIMO systems with phase shift keying (PSK) modulation schemes and low density parity check (LDPC) codes. In order to reduce the complexity by the number of antennas, we adopt minimum mean square error (MMSE) based linear detection scheme with parallel interference cancellation. In addition, soft bit estimation is made only with a single distance calculation per bit, with approximating performance to the maximum likelihood detection 1 .

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Section: Simulation Resultsmentioning

confidence: 99%

Soft Iterative Linear Detection for LDPC Coded MIMO Scheme with PSK

Zhang¹,

Kim²

2017

IJCNS

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“…1) Spectral efficiency modeling: Let us refer to the spectral efficiency performance with LDPC from reference [12] that characterizes the PHY layer of DVB-S2 forward link. It is necessary to convert from symbol to information bit that is from E s /N 0 to E b /N 0 by using the following equivalence [1]:…”

Section: B Proposed Cross-layer Optimizationmentioning

confidence: 99%

Cross-layer optimization of TCP throughput for DVB-S2 links

Barcelo

Giambene

Vázquez-Castro

2008

2008 IEEE International Workshop on Satellite and Space Communications

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Abstract-This paper presents a methodology to optimize the use of the forward link DVB-S2 capacity. Our interest is optimizing the switching E b /N0 thresholds for adaptive coding and modulation selection in DVB-S2 in order to maximize the TCP goodput according to a cross-layer design approach.Index Terms-Adaptive Coding and Modulation (ACM), Crosslayer design, DVB-RCS, DVB-S2, PER, TCP. I. INTRODUCTIONCurrently, most Internet applications such as file transfer, Web browsing and email services are running over the TCP-IP protocol stack. TCP permits to achieve a reliable end-to-end connection for data delivery. TCP operates in a full-duplex way: all data sent must be acknowledged via a return link.Satellite communications represent a viable solution for Internet access for wide areas. For a satellite interactive network, the second-generation of DVB-S, DVB-S2 [1], shall be considered with a return link according to DVB-RCS [2]. In this framework, the forward link is referenced as DVB-S2 link and the return link as DVB-RCS link.DVB-S2 provides an increase in capacity of up to 30% [3] compared to the older first-generation of DVB-S using the same bandwidth and power and under the same channel conditions. This improvement is achieved by applying higher order modulations and by the use of Low Density Parity Check (LDPC) codes and Bose-Chaudhuri-Hochquenghem (BCH) codes. The main novelty is the possibility of using Adaptive Coding and Modulation (ACM). In such a scenario, the selection of the suitable spectral efficiency (η) and the related Modulation and Coding (ModCod) level must be carried out considering the state of the channel. If a spectral efficiency higher than appropriate is used, the system will perceive higher capacity than actually available, but with an excessive Bit Error Rate (BER). Alternatively, if a too low spectral efficiency is selected, there is a waste of capacity. The DVB-S2 standard allows the choice between different ModCods providing a Quasi Error Free (QEF) quality target; this is performed on the basis of suitable E b /N 0 threshold values. In this work we refer to the QEF definition provided in the DVB-S2 standard as "less than one uncorrected error-event per transmission hour at the level of a 5 Mbit/s single TV service decoder", approximately corresponding to a transport stream Packet Error Rate (PER) equal to 10 −7 .

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“…The new Satellite Digital Video Broadcasting standard (DVB-S2) adopted a special class of LDPC codes known by IRA codes (Eroz, Sun & Lee 2004) as the main solution for the FEC system. LDPC-IRA codes ally to the powerful error correction capabilities of the LDPC codes, a linear encoding complexity.…”

Section: Ldpc-ira Codesmentioning

confidence: 99%

HDL Library of Processing Units for Generic and DVB-S2 LDPC Decoding

Gomes¹,

Fernandes²,

Gonçalves³

et al. 2006

Proceedings of the International Conference on Signal Processing and Multimedia Applications

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Abstract:This paper proposes an efficient HDL library of processing units for generic and DVB-S2 LDPC decoders following a modular and automatic design approach. General purpose, low complexity and high throughput bit node and check node functional models are developed. Both full serial and parallel architecture versions are considered. Also, a dedicated functional unit for an array processor LDPC decoder architecture to the DVB-S2 standard is considered. Additionally, it is described an automatic HDL code generator tool for arbitrary decoder architectures and LDPC codes, based on the proposed processing units and Matlab scripts.

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DVB‐S2 low density parity check codes with near Shannon limit performance

Cited by 111 publications

References 6 publications

Soft Iterative Linear Detection for LDPC Coded MIMO Scheme with PSK

Soft Iterative Linear Detection for LDPC Coded MIMO Scheme with PSK

Cross-layer optimization of TCP throughput for DVB-S2 links

HDL Library of Processing Units for Generic and DVB-S2 LDPC Decoding

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