Abstract
This paper considers the use of unequal error protection and median filtering for transmission of images over poor wireless channels usually encountered over cellular mobile networks. Hierarchical Quadrature Amplitude Modulation (HQAM) that provides Unequal Error Protection (UEP) to the transmitted image data is used at the transmitter. In HQAM, non-uniform signal constellation is used to provide different degrees of protection to the significant and non-significant bits in the image data at lower channel Signal to Noise Ratio (SNR). Median filter is employed at the receiver to remove the impulsive noise present in the received image. Simulation results show that the use of HQAM and median filtering provides a gain of PSNR over the more conventional Quadrature Amplitude Modulation (QAM).
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References
El-Khamy SE, Qabel IMA (2008) Robust image transmission through wireless communication channels using unequal error protection based on adaptive image segmentation. In: National radio science conference 2008 (NRSC 2008), 18–20 March 2008, pp 1–9
Barmada B, Gandhi MM, Jones EV, Ghanbari M (2005) Prioritized transmission of data partitioned H. 264 video with HQAM. IEEE Sig Process Lett 12(8):577–580
Ghandi MM, Ghanbari M (2006) Layered H. 264 video transmission with hierarchical QAM. Elsevier J Visual Commun Image Represent, Special issue on H.264/AVC 17(2):451–466
Toh KKV, Ibrahim H, Mahyuddin MN (2008) Salt-and-pepper noise detection and reduction using fuzzy switching median filter. IEEE Trans Consumer Electron 54(4):1956–1961
Hanzo L, Webb W, Keller T (2000) Basic QAM techniques. In: Single and multi carrier quadrature amplitude modulation: principles and applications for personal communications, WLANs and broadcasting. Wiley, London
Zhang S, Karim MA (2002) A new impulse detector for switching median filter. IEEE Signal Process Lett 9(11):360–363
Pratt WK (1978) “Image enhancement” in digital image processing, 4th edn. Wiley, New York
Barmada B, Jones EV (2002) Adaptive mapping and priority assignment for OFDM. In: Third international conference on 3G mobile communication technologies, 2002. (Conf. Publ. No. 489), May 2002, pp 495–499
Mirabbasi S, Martin K (2000) Hierarchical QAM: a spectrally efficient dc-free modulation scheme. Commun Mag IEEE 38(11):140–146
Kader MA, Farid G, Ahmad RB (2011) Development and performance of hierarchical quadrature amplitude modulation (HQAM) for image transmission over wireless channels. In: 3rd international conference on computational intelligence, modeling and simulation (CIMSim-2011), Malaysia, 20–22 Sept 2011, pp 272–232
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Kader, M.A., Ghani, F., Ahmad, R.B. (2014). Image Transmission Over Noisy Wireless Channels Using HQAM and Median Filter. In: Mat Sakim, H., Mustaffa, M. (eds) The 8th International Conference on Robotic, Vision, Signal Processing & Power Applications. Lecture Notes in Electrical Engineering, vol 291. Springer, Singapore. https://doi.org/10.1007/978-981-4585-42-2_17
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DOI: https://doi.org/10.1007/978-981-4585-42-2_17
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