A New UEP Scheme Based on Adaptive Modulation for Robust Video Transmission in MIMO System

نویسندگان

  • Congchong Ru
  • Liuguo Yin
  • Jianhua Lu
  • Chang Wen Chen
چکیده

In order to improve the video transmission performance in multiple input multiple output (MIMO) system, an unequal error protection (UEP) transmission scheme based on coded adaptive modulation is proposed in this paper. Specifically, the excess power which is wasted in normal adaptive modulation schemes is utilized to transmit important bits of the video source. Furthermore, a low density parity code (LDPC) is applied to the important bits to provide unequal error protection. Accordingly, the transmission efficiency and quality are both increased. Simulation results have shown that the proposed scheme may achieve great improvement in PSNR comparing to a normal adaptive modulation scheme.

برای دانلود رایگان متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید

ثبت نام

اگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید

منابع مشابه

An Efficient Hierarchical Modulation based Orthogonal Frequency Division Multiplexing Transmission Scheme for Digital Video Broadcasting

Due to the increase of users the efficient usage of spectrum plays an important role in digital terrestrial television networks. In digital video broadcasting, local and global content are transmitted by single frequency network and multifrequency network respectively. Multifrequency network support transmission of global content and it consumes large spectrum. Similarly local content are well ...

متن کامل

A New Unequal Error Protection Technique Based on the Mutual Information of the MPEG-4 Video Frames over Wireless Networks

The performance of video transmission over wireless channels is limited by the channel noise. Thus many error resilience tools have been incorporated into the MPEG-4 video compression method. In addition to these tools, the unequal error protection (UEP) technique has been proposed to protect the different parts in an MPEG-4 video packet with different channel coding rates based on the rate...

متن کامل

تأثیر عدم توازنIQ برنرخ خطای بیت مدولاسیون تطبیقی در سیستم‌های MIMO

Abstract The effect of IQ imbalance on adaptive MQAM modulation in MIMO systems with direct conversion receivers is investigated in this paper. A continues power, discrete rate adaptive modulation scheme in using MIMO system with perfect channel information in both transmitter and receiver is considered. The selected adaptation mechanism changes the transmit power and transmit constellation s...

متن کامل

Adaptive Observer-Based Decentralized Scheme for Robust Nonlinear Power Flow Control Using HPFC

This paper investigates the robust decentralized nonlinear control of power flow in a power system using a new configuration of UPFC. This structure comprises two shunt converters and one series capacitor called as hybrid power flow controller (HPFC). A controller is designed via control Lyapunov function (CLF) and adaptive observer to surmount the problems of stability such as tracking desired...

متن کامل

UEP MIMO-OFDM with Beamforming- Combining for Imperfect Channel Information

In this paper, unequal error protection (UEP) adaptive multiple-input multiple-output (MIMO) system using orthogonal frequency division multiplexing (OFDM) is considered. Our proposed transmission scheme consists of three stages. The inner stage is a UEP adaptive loading, which is introduced to fulfill a certain UEP profile by distributing bits and power across the unitarily transformed eigenbe...

متن کامل

ذخیره در منابع من

ذخیره در منابع من قبلا به منابع من ذحیره شده

{@ msg_add @}


  با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید

عنوان ژورنال:

دوره   شماره 

صفحات  -

تاریخ انتشار 2006