Name
Abstract | ||
|---|---|---|
DVB-SH systems rely on hierarchical modulation to insert local content in the complementary ground component. The local content is inserted as a low priority (LP) bit stream, while the global content will be transmitted as a high-priority (HP) bit stream. At the receiver, the standard approach of extracting the local content from the received signal requires to detect the global content first. Henceforth, one can remove the global content by subtracting the coded and modulated signal of the detected stream from the received signal. In this paper, we propose and investigate a different approach of removing the global content from the received signal. In our new approach, a hybrid signal is designed, which contains (i) detected bits from the turbo decoder as systematic bits, and (ii) detected bits from the received signal prior to the turbo decoder as parity bits. This technique would relieve the receiver from performing coding and modulation on the detected global content so as to ensure less computational burden and a smaller latency than the current technology. The obvious tradeoff between complexity and performance would imply high bit error rates. Therefore, to mitigate the bit-error-rate performance degradation, we propose to modify the turbo decoder so that the systematic bit streams and the parity bit streams will be decoded differently with respect to their corresponding signal-to-noise ratios. Monte Carlo simulation results demonstrate that our proposed new scheme can achieve less computational complexity and latency in the slight sacrifice of error performance. |
Year | DOI | Venue |
|---|---|---|
2012 | 10.1109/BMSB.2012.6264312 | Broadband Multimedia Systems and Broadcasting |
Keywords | Field | DocType |
Monte Carlo methods,computational complexity,decoding,digital video broadcasting,direct broadcasting by satellite,error statistics,turbo codes,BER performance degradation mitigation,DVB-SH systems,HP bit stream,LP bit stream,Monte Carlo simulation,bit error rates,complementary ground component,computational complexity,global content detection,global content removal,hierarchical modulation,high-priority bit stream,local content extraction,low-priority bit stream,modified turbo decoder,parity bit stream,signal coding-modulation,signal-to-noise ratio,single-frequency networks,systematic bit stream,DVB-SH systems,global content,hierarchical modulation,hybrid satellite and terrestrial single-frequency networks,local content,turbo encoder/decoder | Parity bit,Computer science,Turbo code,Bit field,Real-time computing,Modulation,Decoding methods,Bitstream,Hierarchical modulation,Bit error rate | Conference |
ISSN | ISBN | Citations |
2155-504 E-ISBN : 978-1-4673-0294-4 | 978-1-4673-0294-4 | 0 |
PageRank | References | Authors |
0.34 | 5 | 4 |
Name | Order | Citations | PageRank |
|---|---|---|---|
| Yonas G. Debessu | 1 | 16 | 2.60 |
| Hsiao-chun Wu | 2 | 959 | 97.99 |
| Hong Jiang | 3 | 2137 | 157.96 |
| Bo Rong | 4 | 182 | 24.09 |