Serially Concatenated Luby Transform Coding and Bit-Interleaved Coded Modulation Using Iteratlive Decoding for the Wireless Internet

Tee, R. Y. S.; Nguyen, Thanh Dang; Yang, Lie‐Liang; Hanzo, Lajos

doi:10.1109/vetecs.2006.1682768

Cited by 20 publications

(36 citation statements)

References 9 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…For the sake of reliably recovering the entire original file, the LT encoder seen in Figure 1 generates L = L k + Le number of packets from the incoming L k packets, where Le is the number of redundant packets that has to be as low as possible. The so-called improved robust degree distribution of LT codes [10] was used for the sake of achieving as low packet overhead, i.e. Le as possible 1 Then, the LT-protected packets are transmitted over the Internet, which is, again modeled as a BEC having an erasure probability of Pe.…”

Section: Ii-a System Modelmentioning

confidence: 99%

“…Since the LT decoder only requiresL number of packets for recovering the data file, the packet selector of Figure 1 chooses appropriately optimizedL packets, which contains the lowest number of errors from the BI-DST-CM-ID decoder based on the proposed LLR-based packet reliability estimation algorithm, which will be outlined immediately in Section II-B. Finally, the LT decoder [10] of Figure 1, recovers the data file using theL number of unerased packets, which are likely to be error-free and hence avoids the otherwise inevitable avalanche-like LT decoding error propagation.…”

Section: Ii-a System Modelmentioning

confidence: 99%

“…In [10], the authors investigated the joint benefit of Forward Error Correction (FEC) codes and LT codes where the source transmitted a limited number of redundant packets using LT encoding, which assisted the receiver in recovering all the original data packets, even if the FEC code failed to remove all the errors in some of the packets, which hence had to be erased for the sake of avoiding avalanche-like LT-decoder induced error propagation. As in most of the schemes found in the literature in addition to the desired data, the 16-bit CRC, which instructed the LT decoder to erase the erroneous packets, also has to be transmitted.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Integrated LT Coding, Bit Interleaved Differential Space Time Coding and Sphere Packing Modulation for the Wireless Internet

Nguyen

Wei

et al. 2008

VTC Spring 2008 - IEEE Vehicular Technology Conference

Self Cite

View full text Add to dashboard Cite

In this treatise, a jointly optimized Bit Interleaved Coded Modulation using Iterative Decoding (BICM-ID) and Luby Transform (LT) coding scheme was proposed for the sake of attaining the best possible performance, when communicating over the wireless Internet. This scheme is particularly attractive when handling packetized wireless Internet data traffic received over wireless channels inflicting both statistically multiplexing induced packet erasure and packet corruption imposed by the channel without retransmitting the corrupted packets. A LLR-based estimation packet reliability algorithm was proposed to assist the LT decoder in recovering all the transmitted packets. Furthermore, the bit-to-sphere-packingsymbol mapping scheme was optimized for achieving error free LT decoding at the lowest possible E b /N0 value rather than for approaching the channel's capacity. These two design philosophies require different mapping schemes. Finally, Differential Space Time Coding (DSTBC) was employed for combatting the effects of fading and provided spatial diversity at the same time. The LT code's packet length was also carefully chosen to strike a good balance between the affordable complexity and the achievable performance.

show abstract

Section: Ii-a System Modelmentioning

confidence: 99%

Section: Ii-a System Modelmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Integrated LT Coding, Bit Interleaved Differential Space Time Coding and Sphere Packing Modulation for the Wireless Internet

Nguyen

Wei

et al. 2008

VTC Spring 2008 - IEEE Vehicular Technology Conference

Self Cite

View full text Add to dashboard Cite

show abstract

“…When employed for transmission over wireless channels, which impose both fading and intersymbol interference (ISI), the LT code might become contaminated, which results in catastrophic inter-packet error propagation during LT decoding [23]. In order to mitigate the deleterious effects of error propagation, LT codes have been frequently combined with classic physicallayer FEC codes [23,24]. The idea of combining classic FEC codes with LT codes by directly amalgamating them was proposed in [6], where systematically concatenated parity bits were incorporated in order to create the family of SLT codes.…”

Section: Introductionmentioning

confidence: 99%

Amplify-forward and decode-forward cooperation relying on systematic Luby transform coded Hybrid Automatic-Repeat-reQuest

2011

Self Cite

View full text Add to dashboard Cite

Systematic Luby transform (SLT) codes constitute rateless codes, which are capable of adaptively adjusting their code rate depending on the channel quality without any explicit channel state information (CSI) at the transmitters. SLTs are also suitable for space time collaboration-aided relay networks. In this study, an iterative decoding-aided SLT scheme is combined with 16 quadrature amplitude modulation (QAM) transmission in a wireless relay-aided network. The bit error ratio (BER) results and extrinsic information transfer (EXIT) charts are provided to evaluate the performance of the proposed scheme. The simulation results show that the proposed scheme using amplify-and-forward (AF) relaying achieves a 2.5 dB gain at a BER of 10 25 , while the attainable improvement is nearly 6 dB for decode-and-forward (DF) relaying, compared to the noniterative detection scheme operating without the relay's assistance. Moreover, the AF relaying-aided SLT coded 16-QAM scheme is more beneficial, when the relay station is close to the source. By contrast, the DF relaying performs best near the mid-point between the source and the destination. Additionally, a modified Hybrid Automatic-Repeat-reQuest (HARQ) protocol using incremental redundancy is applied along with the SLT-coded 16-QAM scheme in order to enhance the achievable throughput and energy efficiency of cooperative networks. This arrangement reduces the total transmit power by about 5%, compared to the classic HARQ scheme.

show abstract

“…If the LT decoder processes error-infested pack-LT decoding is 11 000. Then we have to consider two ets, the error will be propagated to all other packets, decoding scenarios, namely when the number of errowhich are related to this particular packet, as determined neous packets is higher than 11 700 -11 000 = 700, as by the LT code's degree distribution [11]. Hence we well as when it is lower than 700.…”

mentioning

confidence: 99%

Luby Transform Coding Aided Iterative Detection for Downlink SDMA Systems

Wei

Nguyen

et al. 2007

2007 IEEE Workshop on Signal Processing Systems

Self Cite

View full text Add to dashboard Cite

Serially Concatenated Luby Transform Coding and Bit-Interleaved Coded Modulation Using Iteratlive Decoding for the Wireless Internet

Cited by 20 publications

References 9 publications

Integrated LT Coding, Bit Interleaved Differential Space Time Coding and Sphere Packing Modulation for the Wireless Internet

Integrated LT Coding, Bit Interleaved Differential Space Time Coding and Sphere Packing Modulation for the Wireless Internet

Amplify-forward and decode-forward cooperation relying on systematic Luby transform coded Hybrid Automatic-Repeat-reQuest

Luby Transform Coding Aided Iterative Detection for Downlink SDMA Systems

Contact Info

Product

Resources

About