Modification on Energy Efficient Design of DVB-T2 Constellation De-mapper

نویسندگان

  • Nourhan M Bahgat
  • Diaa El din S Khalil
  • Salwa H El-Ramly
چکیده

The second generation of terrestrial digital video broadcasting standard (DVB-T2) offers several advantages for greater efficiency. Signal Space Diversity (SSD) contains rotated constellation and Q-Delay (RQD), which is one of advantage that offered to improve the performance over fading channels compared to the non-rotated modulation. In this journal, the proposed low-power de-mapper design of this work attempts to employ the introduced SSD to reduce power through replacing LLR calculations by a significantly less complex projectionbased de-mapping whenever possible. It benefits from an algorithm that applies projection-based de-mapping to significantly reduce LLR computations without deteriorating performance. Two versions are introduced for hard de-mapping and soft de-mapping. The design uses several techniques simultaneously to be even more energy efficient without affecting the performance. Prototype results indicate significant reduction of LLR calculations as Eb/N0 increases with no performance degradation. The idea and energy saving techniques can be easily applied to any rotated constellation de-mapper.

برای دانلود 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

Comaprison of the Dvb-s and Dvb-s2 Satellite Digital Television Transmission

The contribution is focused on comparison of the measurements and simulation of the DVB-S (Digital Video Broadcasting Satellite) and DVB-S2 (Digital Video Broadcasting – Satellite 2 Generation) digital television transmission. The results of the QPSK (Quadrature Phase Shift Keying) and 8-PSK modulations and their constellation analysis are presented on the case of the various MER (Modulation Er...

متن کامل

Improved Channel Estimation for DVB-T2 Systems by Utilizing Side Information on OFDM Sparse Channel Estimation

The second generation of digital video broadcasting (DVB-T2) standard utilizes orthogonal frequency division multiplexing (OFDM) system to reduce and to compensate the channel effects by utilizing its estimation. Since wireless channels are inherently sparse, it is possible to utilize sparse representation (SR) methods to estimate the channel. In addition to sparsity feature of the channel, the...

متن کامل

LDPC FEC Code Extension for Unequal Error Protection in DVB-T2 System: Design and Evaluation

The Digital Video Broadcasting organisation has recently introduced the second generation of terrestrial broadcast transmission standards, DVB-T2. The newly introduced tools ensure significant gain in performance of DVB-T2 compared to the first generation variant of the standard. One of these tools is the new physical layer concatenated forward error correction code. The inner among the concate...

متن کامل

DVB-T2 Simulation Model for OPNET

DVB-T2 is offering a new way for broadcasting value-added services to end users, such as High Definition (HD) TV and 3D TV. Thanks to the advances made in digital signal processing, and specifically in channel coding, DVBT2 brings an increased transfer capacity of 50% and a new flexibility in services’ broadcasting in contrast with the first generation DVB-T standard. As DVB-T2 is still in depl...

متن کامل

Optimization of a Coded-Modulation System with Shaped Constellation

Optimization of a Coded-Modulation System with Shaped Constellation by Xingyu Xiang Ph.D. in Electrical Engineering West Virginia University Matthew C. Valenti, Ph.D., Chair Conventional communication systems transmit signals that are selected from a signal constellation with uniform probability. However, information-theoretic results suggest that performance may be improved by shaping the cons...

متن کامل

ذخیره در منابع من


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

برای دانلود 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

عنوان ژورنال:

دوره   شماره 

صفحات  -

تاریخ انتشار 2015