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Combined Source-Channel Coding of Images under Power and Bandwidth Constraints


This paper proposes a framework for combined source-channel coding for a power and bandwidth constrained noisy channel. The framework is applied to progressive image transmission using constant envelope-ary phase shift key (-PSK) signaling over an additive white Gaussian noise channel. First, the framework is developed for uncoded-PSK signaling (with). Then, it is extended to include coded-PSK modulation using trellis coded modulation (TCM). An adaptive TCM system is also presented. Simulation results show that, depending on the constellation size, coded-PSK signaling performs 3.1 to 5.2 dB better than uncoded-PSK signaling. Finally, the performance of our combined source-channel coding scheme is investigated from the channel capacity point of view. Our framework is further extended to include powerful channel codes like turbo and low-density parity-check (LDPC) codes. With these powerful codes, our proposed scheme performs about one dB away from the capacity-achieving SNR value of the QPSK channel.


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Correspondence to Nouman Raja.

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Raja, N., Xiong, Z. & Fossorier, M. Combined Source-Channel Coding of Images under Power and Bandwidth Constraints. EURASIP J. Adv. Signal Process. 2007, 049172 (2006).

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  • Additive White Gaussian Noise
  • Channel Code
  • Noisy Channel
  • Additive White Gaussian Noise Channel
  • Powerful Channel