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For conventional multiple-input and multiple-output (MIMO) selective decode-and-forward (S-DF) relaying network, without global channel knowledge, base station (BS) normally allocates its transmission power for the channel links between itself and its served users. In this case, if the received signal power at relay station (RS) is larger enough, RS will help BS decode and forward the messages. However,...
Densely deployed wireless networks is one of the most important solutions for spectrum shortage expected by 2020 with a huge economic impact. This paper proposes decoding schemes for high- dense vehicular multiway multirelaying (HDV-MWMR) systems comprising multiple multiway relays to serve huge number of users or devices. Due to the nature of huge number, instead of using perfect scheduling, we consider...
In this paper, the energy efficiency (EE) of a cooperative diversity system with maximum diversity network coding (MDNC) is studied. In the considered system, channel state information (CSI) is only available at the receivers for all the channels. We formulate the problem of maximizing the EE under the constraint on the outage probability. The problem is NP-hard due to the non-convexity of the outage...
This paper presents a routing algorithm for wireless multi-hop ad hoc networks, which applies distributed source coding (DSC) and multi-path transport of data packets. DSC enables the relay nodes to efficiently encode the packets and helps the destination node to correctly decode the information from multiple erroneous copies of the same packet received via different paths. While in conventional communication...
This paper studies the secrecy outage probability of hybrid relay selection scheme which switches between full-duplex and half-duplex mode. First, motivated by the fact that either the full-duplex or half duplex has its own disadvantages, i.e., the full- duplex suffers from inherently self-interference even after cancellation by advanced technology while half-duplex cannot receive and transmit data...
In this paper, we consider the performance analysis of a decode-and-forward (DF) cooperative relaying (CR) scheme over bursty impulsive noise channel. As compared to existing literature, here, we generalize the performance analysis to the multi-relay scenario with and without considering error propagation from the relays. For this scheme, we evaluate the bit error rate (BER) performance in the presence...
The present paper evaluates the performance of regenerative multi-relay dual-hop cooperative network systems over non-homogeneous scattering conditions, which characterize realistic radio propagation scenarios in both conventional and emerging wireless communication systems. The considered analysis assumes maximum-ratio-combining reception at the destination node which improves the overall system...
We study the transmission over a cloud radio access network in which multiple base stations (BS) are connected to a central processor (CP) via finite-capacity backhaul links. We propose a lattice-based coding scheme in which the BSs decode linear combinations of the transmitted messages, in the spirit of Compute-and-Forward (CoF), but differs from it essentially in that the decoded equations are remapped...
Both scalar and vector quantization are studied when Compress and Forward (CF) is performed in the Two Way Relay Channels. The optimization schemes of these two kinds of quantizers aiming to maximize the sum rate are proposed. The optimization schemes are a combination of the Information Bottleneck (IB) method and the Bi- Section method. The performance of these two types of quantizers are compared...
In this paper, we investigate energy cooperation among sustainable cooperative relay nodes, which adopt decode- and-forward (DF) relaying. The relay nodes work on either information decoding (ID) mode or energy harvesting (EH) mode when receiving the signal from the source. Due to different harvested energy at the relay nodes, effective energy cooperation can benefit the energy efficiency, but suffer...
In this paper, an adaptive cooperation scheme is presented for bidirectional communication between two nodes, where the non-relay direct transmission and the one- or two-way relaying diversity transmission are jointly considered. The results show that the proposed scheme obtains lower outage probability than the conventional bidirectional communication methods.
This paper studies the technique of bit-interleaved coded modulation with iterative decoding (BICM-ID) in a two-way relaying communication system. Iterative decoding based on the quaternary code representation is adopted at the relay for the multiple access (MA) phase. An upper-bound of the bit error probability (BEP) under the error-free (EF) feedback assumption for BICM-ID in the MA phase is obtained...
Physical-layer network coding (PNC) can potentially boost the throughput of a two-way relay network by 100% compared with conventional packet forwarding schemes. However, the complexity of PNC channel decoders can be considerably higher than the complexity of channel decoders for point-to-point communication systems. Although many PNC channel decoders proposed to date have good decoding performance,...
The paper investigates the scenario of wireless multicast with a single transmitter and multiple relays that jointly deliver successively refined (or multi-resolution) sources to multiple receivers. An asynchronous cooperative joint source-channel coding (JSCC) protocol is proposed, which can mitigate the complexity and difficulty in signal synchronization under the wireless multicast with cooperative...
Energy harvesting has emerged as a promising technique which helps to increase the sustainability of wireless networks. In this paper, we consider a network with a single source, single destination and a single relay equipped with multiple antennas. We develop an optimization framework that exploits the energy harvested from the source radio frequency signals with smart antenna selection schemes at...
In Mars-to-Earth communications, data transmission suffered severe losses due to the huge path-loss, extremely long propagation delay and lack of line-of-sight link in rovers-to-Earth. Based on delay/disruption tolerant networks (DTN), we proposed a systematic Raptor Network Coding (RNC) scheme for the multi-rovers transform data through an orbiter to Earth station communication scenarios. To enhance...
Trying to overcome the obstacles, such as low throughput and high SER or BER in traditional satellite systems, PNC was implied in the Satellite PNC System established in this paper with efficiency and reliability. The performances of AF-PNC, DF-PNC and DNF-PNC in the Satellite PNC System were investigated with simulations. With simulations results, an adaptive PNC strategy-Adaptive PNC was proposed...
In this paper, we present a cooperative video multicast protocol for densely deployed small cells. We assume that the small cell Base Stations (BS) have overlapping coverages and they are allowed to have interfering transmissions. The proposed cooperative multicast protocol realizes a two-hop transmission system where each hop has its own time slot. In the first hop, the small cell base stations simultaneously...
In this paper we consider the Two Way Relay Channel (TWRC) where Noisy Network Coding (NNC) is performed. We propose an optimization scheme in terms of the sum rate by combining the Information Bottleneck (IB) method and the Bi-Section method. Then we compare the performance of the quantizer optimized by the proposed algorithm with other quantizers. We also compare and analyse the maximized sum rate...
This paper investigates the linear network coding map in a Physical-layer Network Coding (PNC) operated two-way relay network. To realize the full potential of Physical-layer Network Coding in high SNR regimes, we need to use high-order signaling beyond BPSK/QPSK. In a PNC system with high-order signaling, we can have many different choices for the network coding (NC) map. For linear network coding,...
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