A Jointly Optimized Variable M-QAM and Power Allocation Scheme for Image Transmission
المؤلفون المشاركون
Bin Sediq, Akram
El-Tarhuni, Mohamed
Hassan, Mohamed
المصدر
Journal of Computer Networks and Communications
العدد
المجلد 2012، العدد 2012 (31 ديسمبر/كانون الأول 2012)، ص ص. 1-14، 14ص.
الناشر
Hindawi Publishing Corporation
تاريخ النشر
2012-02-29
دولة النشر
مصر
عدد الصفحات
14
التخصصات الرئيسية
تكنولوجيا المعلومات وعلم الحاسوب
الملخص EN
We introduce an improved image transmission scheme over wireless channels with flat Rayleigh fading.
The proposed scheme jointly optimizes bit power and modulation level to maximize the peak signal-to-noise ratio (PSNR) of the reconstructed image and hence improves the perceptual quality of the received image.
In this optimization process, the significance of bits with regard to the overall quality of the image is exploited.
The optimality of the proposed algorithm is demonstrated using the Lagrange method and verified through an iterative offline exhaustive search algorithm.
For practical implementation, a look-up table is used at the transmitter for assigning the bit power and modulation level to each bit stream according to the received signal-to-noise ratio (SNR) observed at the receiver.
The proposed scheme has low complexity since the look-up table is computed offline, only once, and used for any image which makes it suitable for devices with limited processing capability.
Analytical and simulation results show that the proposed scheme with jointly optimized bit power and variable modulation level provides an improvement in PSNR of about 10 to 20 dB over fixed power fixed modulation (16-QAM).
A further reduction in complexity is achieved by using the average signal-to-noise ratio rather than the instantaneous SNR in selecting the system parameters.
نمط استشهاد جمعية علماء النفس الأمريكية (APA)
El-Tarhuni, Mohamed& Hassan, Mohamed& Bin Sediq, Akram. 2012. A Jointly Optimized Variable M-QAM and Power Allocation Scheme for Image Transmission. Journal of Computer Networks and Communications،Vol. 2012, no. 2012, pp.1-14.
https://search.emarefa.net/detail/BIM-487614
نمط استشهاد الجمعية الأمريكية للغات الحديثة (MLA)
El-Tarhuni, Mohamed…[et al.]. A Jointly Optimized Variable M-QAM and Power Allocation Scheme for Image Transmission. Journal of Computer Networks and Communications No. 2012 (2012), pp.1-14.
https://search.emarefa.net/detail/BIM-487614
نمط استشهاد الجمعية الطبية الأمريكية (AMA)
El-Tarhuni, Mohamed& Hassan, Mohamed& Bin Sediq, Akram. A Jointly Optimized Variable M-QAM and Power Allocation Scheme for Image Transmission. Journal of Computer Networks and Communications. 2012. Vol. 2012, no. 2012, pp.1-14.
https://search.emarefa.net/detail/BIM-487614
نوع البيانات
مقالات
لغة النص
الإنجليزية
الملاحظات
Includes bibliographical references
رقم السجل
BIM-487614
قاعدة معامل التأثير والاستشهادات المرجعية العربي "ارسيف Arcif"
أضخم قاعدة بيانات عربية للاستشهادات المرجعية للمجلات العلمية المحكمة الصادرة في العالم العربي
تقوم هذه الخدمة بالتحقق من التشابه أو الانتحال في الأبحاث والمقالات العلمية والأطروحات الجامعية والكتب والأبحاث باللغة العربية، وتحديد درجة التشابه أو أصالة الأعمال البحثية وحماية ملكيتها الفكرية. تعرف اكثر