QoS-Aware Transmission Policies for OFDM Bidirectional Decode-and-Forward Relaying

Wireless Information and Energy Transfer for Decode-and-Forward Relaying MIMO-OFDM Networks

This paper investigates the system achievable rate and optimization for the multiple-input multiple-output (MIMO)-orthogonal frequency division multiplexing (OFDM) system with an energy harvesting (EH) relay. Firstly we propose a time switchingbased relaying (TSR) protocol to enable the simultaneous information processing and energy harvesting at the relay. Then, we discuss its achievable rate ...

A Cognitive Subcarriers Sharing Scheme for OFDM Based Decode and Forward Relaying System

This paper analyzes the performance of a proposed subcarriers sharing scheme. According to the scheme, secondary system helps the primary system via two phase Decode and Forward orthogonal frequency division multiplexing based relaying. If primary (licensed user) is unable to achieve its target rate then secondary transmitter (which is located within a critical distance from primary transmitter...

Rate, Reliability, and Delay Tradeoffs for Decode-and-Forward Relaying

We extend the random coding error exponent to three common decode-and-forward schemes for the relay channel. The resulting bounds give achievable tradeoffs among rate, reliability, and delay, allowing comparison of decode-and-forward with direct transmission and other schemes in broader terms than asymptotic achievable rates alone. In contrast to the asymptotic case in which the achievable rate...

LDPC Code Design for Half-Duplex Decode-and-Forward Relaying

We propose LDPC code designs for the half-duplex relay channel. Our designs mimic the information theoretic random coding scheme for decode-and-forward relaying. An important advantage of our scheme is that it is built entirely of single-user codes that can be decoded by belief propagation. The optimization of relay LDPC code profiles presents unique challenges, which are met by using the densi...

Are Amplify-and-Forward Relaying and Decode-and-Forward Relaying the Same?