TY - JOUR
T1 - Multi-tier cooperative broadcasting with hierarchical modulations
AU - Wang, Tairan
AU - Cano, Alfonso
AU - Giannakis, Georgios B.
AU - Ramos, F. Javier
PY - 2006/12/1
Y1 - 2006/12/1
N2 - We consider broadcasting to multiple destinations with uneven quality receivers. Based on their quality of reception, we group destinations in tiers and transmit using hierarchical modulations. These modulations are known to offer a practical means of achieving variable error protection of the broadcasted information to receivers of variable quality. After the initial broadcasting step, tiers successively rebroadcast part of the information they received from tiers of higher-quality to tiers with lower reception capabilities. This multi-tier cooperative broadcasting strategy can accommodate variable rate and error performance for different tiers but requires complex demodulation steps. To cope with this complexity in demodulation, we derive simplified pertier detection schemes with performance close to maximum likelihood and ability to collect the diversity provided as symbols propagate through diversified channels across successive broadcastings. Error performance is analyzed and compared to (non)-cooperative broadcasting strategies. Simulations corroborate our theoretical findings.
AB - We consider broadcasting to multiple destinations with uneven quality receivers. Based on their quality of reception, we group destinations in tiers and transmit using hierarchical modulations. These modulations are known to offer a practical means of achieving variable error protection of the broadcasted information to receivers of variable quality. After the initial broadcasting step, tiers successively rebroadcast part of the information they received from tiers of higher-quality to tiers with lower reception capabilities. This multi-tier cooperative broadcasting strategy can accommodate variable rate and error performance for different tiers but requires complex demodulation steps. To cope with this complexity in demodulation, we derive simplified pertier detection schemes with performance close to maximum likelihood and ability to collect the diversity provided as symbols propagate through diversified channels across successive broadcastings. Error performance is analyzed and compared to (non)-cooperative broadcasting strategies. Simulations corroborate our theoretical findings.
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M3 - Conference article
AN - SCOPUS:84862601383
SN - 2219-5491
JO - European Signal Processing Conference
JF - European Signal Processing Conference
T2 - 14th European Signal Processing Conference, EUSIPCO 2006
Y2 - 4 September 2006 through 8 September 2006
ER -