Incremental Selective Decode-and-Forward Relaying for Power Line Communication

Abstract

In this paper, an incremental selective decode-andforward (ISDF) relay strategy is proposed for power line communication (PLC) systems to improve the spectral efficiency. Traditional decode-and-forward (DF) relaying employs two time slots by using half-duplex relays which significantly reduces the spectral efficiency. The ISDF strategy utilizes the relay only if the direct link quality fails to attain a certain information rate, thereby improving the spectral efficiency. The path gain is assumed to be log-normally distributed with very high distance dependent signal attenuation. Furthermore, the additive noise is modeled as a Bernoulli-Gaussian process to incorporate the effects of impulsive noise contents. Closed-form expressions for the outage probability and the fraction of times the relay is in use, and an approximate closed-form expression for the average bit error rate (BER) are derived for the binary phase-shift keying signaling scheme. We observe that the fraction of times the relay is in use can be significantly reduced compared to the traditional DF strategy. It is also observed that at high transmit power, the spectral efficiency increases while the average BER decreases with increase in the required rate.

Performance analysis of cooperative power‐line communication system with signal space diversity

“…During the relay phase, R will transmit the symbol to D if R correctly decodes the symbol (determined by cyclic redundancy check [CRC]); else, S will transmit the symbol to D . The relay informs the source about its failure in decoding through a reliable feedback channel . Thus, with the SSD scheme, we can transmit two symbols in two phases, and hence, full spectral efficiency is achieved.…”

“…The incremental selective DF relaying for PLC has been proposed in the works of Dubey et al Mathur et al studied the performance of dual‐hop wireless‐power‐line mixed cooperative system with DF relaying. An opportunistic DF‐based multiple‐relaying scheme where the optimal relay is selected for data processing has been proposed in the work of Qian et al However, the cooperative PLC systems discussed in other works are based on the conventional repetition‐based DF relaying strategy, and thus, the improvement in the reliability of the received signal at the destination node is achieved at the cost of reduction in spectral efficiency as the relay transmits the same symbol received from the source node to the destination node during relay phase. Here, the term spectral efficiency quantifies the number of resource units used for transmitting a single data symbol (or a given number of data symbols).…”

Energy-per-bit performance analysis of relay-based visible-light communication systems

“…Finally, we substitute (25) into (19) to find the energy/bit performance of the DF-based VLC system which can be written as in (26)…”

“…Furthermore, the required data rate should be achieved by the first link (i.e., source-to-relay link). This means that the IDF will not take place as long as the direct-links is able to achieve the required link quality which leads to less power consumption and better energy efficiency [25]. Considering this, the energy consumption of the system can be written as…”

Improved EXIT Algorithm Based on Gaussian Mixture Model and its Application to LDPC Construction in Coding Cooperative Systems With Hybrid Fading

“…Exploring the relay forwarding in PLC applications, Dubey et al analyze the system performance of PLC using amplify and forward (AF) [9] and decode and forward (DF) [10] relays. In [11], an energy allocation algorithm in multi-base-station collaboration system is studied.…”