Title :
Adaptive Modulation for OFDM-Based Multiple Description Progressive Image Transmission
Author :
Tan, S.S. ; Rim, M.J. ; Cosman, P.C. ; Milstein, L.B.
Author_Institution :
Electr. & Comput. Eng. Dept., Univ. of California San Diego, La Jolla, CA
Abstract :
This paper addresses the use of adaptive modulation in progressive image transmission with multiple description coding in conjunction with an Orthogonal Frequency Division Multiplexing (OFDM) system. Specifically, two adaptive systems are considered: variable rate with fixed power, and variable rate with variable power. An algorithm is proposed to allocate power and constellation size at each subchannel by maximizing the throughput. Simulation results confirm that cross-layer optimization with adaptive modulation enhances system performance.
Keywords :
OFDM modulation; visual communication; OFDM-based multiple description progressive image transmission; adaptive modulation; adaptive systems; cross-layer optimization; multiple description coding; orthogonal frequency division multiplexing system; power allocation; system performance; Adaptive systems; Cyclic redundancy check; Decoding; Image coding; Image communication; Modulation coding; Niobium; OFDM modulation; Reed-Solomon codes; Throughput;
Conference_Titel :
Global Telecommunications Conference, 2008. IEEE GLOBECOM 2008. IEEE
Conference_Location :
New Orleans, LO
Print_ISBN :
978-1-4244-2324-8
DOI :
10.1109/GLOCOM.2008.ECP.620
