Performance of Amplify and Forward Relays with Predicted CSI

نویسندگان
چکیده

برای دانلود باید عضویت طلایی داشته باشید

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

اگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید

منابع مشابه

Performance of Amplify and Forward Relays with Predicted CSI

In cooperative relay networks, Channel State Information (CSI) is estimated at receiver. The estimated CSI is sent back to the relays through feedback link. This estimated CSI is often outdated due to feedback delay and the estimated outdated CSI is used for relay selection and detection which affects the performance of the system. The outage and error rate performance of the relay selection sc...

متن کامل

Performance Analysis for Amplify-and-Forward Relay Selection with Outdated CSI

The impact of outdated channel state information (CSI) on the performance of relay selections, including the partial relay selection and the best relay selection, is studied, with amplify-and-forward (AF) mode cooperative systems being considered. The proposed method is analyzed by deriving the asymptotic closed-form expressions for some figures of merit such as the outage probability and the s...

متن کامل

Rateless Coding over Wireless Relay Networks Using Amplify/Decode and Forward Relays

In this paper two different rateless transmissionschemes are developed. In the proposed scheme, relay node candecode and forward the message to the destination if they areable to decode it, or amplify and forward the message to thedestination. Based on the analysis and simulation resultsprovided in this paper, the proposed method has bettertransmission time than the scheme which only the relay ...

متن کامل

Performance of Optimum Switching Adaptive -QAM for Amplify-and-Forward Relays

Optimization of the switching thresholds for constant-power adaptive five-mode M -ary quadrature amplitude modulation (M -QAM) transmission with an amplify-and-forward (AF) relay network is developed. The optimization criterion is the maximization of spectral efficiency subject to an average bit-error-rate (BER) constraint. This approach results in a constant-BER variable-rate M -QAM AF relay s...

متن کامل

Cooperative Amplify–and–Forward Beamforming for OFDM Systems with Multi–Antenna Relays

In this paper, we propose a beamforming (BF) scheme for cooperative orthogonal frequency division multiplexing (OFDM) networks with multiple amplify–and–forward (AF) relays equipped with arbitrary numbers of antennas. Adopting the average mutual information (AMI) per sub–carrier as optimality criterion, we obtain closed–form expressions for the directions of the optimal BF weights at the source...

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

ژورنال

عنوان ژورنال: Research Journal of Applied Sciences, Engineering and Technology

سال: 2015

ISSN: 2040-7459,2040-7467

DOI: 10.19026/rjaset.11.1717