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Spinal codes are a recently proposed capacity-achieving rateless code. While hardware encoding of spinal codes is straightforward, the design of an efficient, high-speed hardware decoder poses significant challenges. We present the first such decoder. By relaxing data dependencies inherent in the classic M-algorithm decoder, we obtain area and throughput competitive with 3GPP turbo codes as well as...
In this paper, we apply HARQ to a wireless feedback control system for realizing high dependable communication. We assume that a controller transmits packets of controlled variables through the propagation channel equivalent with the IEEE 802.15.6 CM2 using some punctured convolutional codes whose code rate is different each other. We propose QoS-HARQ which changes the code rate responding to the...
A wireless ad-hoc network can be made to perform better via a range of approaches. One such approach is network coding, which involves broadcasting of encoded packets and therefore can substantially enhance network capacity whilst preserving the quality of service. The use of routing algorithms that are aware of network coding can help to strengthen the benefits of this approach. In order to gain...
A decentralized coded caching technique is introduced for wireless ad hoc networks in which all the existing contents are randomly combined and cached. The scaling behavior of the network is studied in terms of both capacity and security. Proactive and reactive routing techniques for coded caching are presented and the scaling capacity of the network for each case is derived. It has been shown that...
Visible Light Communication (VLC) is considered as a promising future wireless communications technology. Light-to-camera is one of the VLC key technique using CMOS sensors Camera captures flickering LED and gets the data. The information captured in the camera in the form of light and dark bands. The data receiving rate is decided by band detection level. Therefore, various detection methods are...
Due to their lack of assessment mechanisms of link quality in VANET environments, routing protocols do not deal efficiently with highly volatile links. One way to fill this gap would be to anticipate links breakages with new route computation. Currently available link quality indicators are not sufficiently responsive to consider forecasting. In this paper we present a novel predictive link quality...
Cloud radio access network (CRAN) is a promising candidate for the next-generation wireless communication systems. In CRAN, remote radio heads (RRHs) are deployed to serve users in a target area, which are connected to a central processor (CP) via limited-capacity links termed the fronthaul. In practice, the large amount of information transferred between each RRH and the CP for centralized processing...
This paper considers the problem of maximizing energy efficiency on the downlink of two-tier wireless backhaul small cell heterogeneous networks, where an interference mitigation strategy that combines reverse time division duplexing and equally orthogonal spectrum splitting is proposed. By enabling the small cell access points with the capability of switching ON/OFF, we develop a joint design of...
Recent advances in rateless codes facilitate the utilization of dense constellation. By exploiting more constellation points with controlled symbol distance, they ensure higher transmission date rate and better diversity gain against fading. In this paper, we observe that there exists certain redundancy in the existing dense constellation diagram. With proper design, such redundancy can be can be...
This paper presents sparse Bayesian learning (SBL)-based estimation schemes for an approximately sparse wireless multipath channel impulse response (MCIR) in a space-time trellis coded (STTC) multiple-input multiple-output (MIMO) orthogonal frequency division multiplexing (OFDM) system. The proposed schemes consider space-time trellis encoding over consecutive OFDM symbols and employ the multiple...
We propose a new linear physical-layer network coding and information combining scheme for the K-user fading multiple-access relay network (MARN), which consists of K users, one relay and one destination. The relay and the destination are connected via a rate-constraint backhaul link. In the proposed scheme, the K users transmit signals simultaneously. The relay and the destination receive the superimposed...
Compute-and-Forward relaying schemes exploit the additive nature of the wireless channel for decoding linear equations/combinations of transmitted messages. However, decoding equations that maximize the computation rate at each relay is in general not optimal from the network perspective. In fact, the (destination) receiver may fail to recover the individual messages even when the relays have successfully...
With the advent of the space age, deep space exploration increasingly has become an important strategic task for human beings. To carry out space exploration, it is necessary to launch many space detectors with a variety of purposes, so that it requires establishing effective communication between the detector, and between the detectors and the Earth, that is to carry out deep space communication...
Orthogonal frequency division multiplexing (OFDM) is the most promising approach to combat the frequency selective fading nature of wide-band wireless channels. On the other hand, complex field network coding (CFNC) scheme offers the advantages of better spectral efficiency and full diversity when utilized in multiuser cooperative communication systems. The efficiency of CFNC scheme in relay based...
In this paper, we consider a multiuser multiple-input single-output downlink system for Simultaneous Wireless Information and Power Transfer(SWIPT). Different from the conventional battery-free power splitting strategy, the harvested energy can be buffered in a battery before consumption. Accordingly, increasing battery lifetime, where the base station is powered by sustainable energy. A sum rate...
Wireless transceiver is a mandatory component of any kind of wireless sensors. Inside wireless transceiver, Viterbi decoder (VD) is needed to improve the decoding performance of the transceiver. In this paper, we propose a low complexity Viterbi decoder algorithm for wireless sensors that aim to support Internet of Thing (IoT) applications. Our algorithm is named as K-min Viterbi decoder because only...
We propose two rate selection methods in wireless multicast systems where an incremental redundancy type hybrid automatic repeat request (HARQ-IR) scheme is employed under Rayleigh block-fading channels. We aim at maximizing the long-term average transmission rate (LATR) while the maximum number of retransmissions is limited to L − 1 and the probability that at least one user fails to decode a message...
In this paper, we design a signal alignment scheme that exploits orthogonality of spatial signalling dimensions in the multiple-input multiple-output (MIMO) Y channel, where three users send messages to each other through a relay. The antenna configuration in the original MIMO Y channel system imposes limitations on controlling the minimum distance between signaling points representing network coded...
An amplify-and-forward (AF) wireless relay strategies consisting of dispersed M sources, N relays, and M destinations all equipped with a single antenna is investigated in this paper. The salient objective of this paper is to determine jointly and iteratively the diagonal source-relay precoder and destination decoder matrices under the transmit power constraint at the both sources and relays based...
Low capacity, bulky size and wiring limitations of the conventional wireless multi-channel electroencephalography (EEG) system restrict its use as brain neuromonitoring system. To reduce such restriction, this paper proposes an EEG system based on multi-input multi-output (MIMO) technique and polar coded data. In the proposed system, all the channels are sent and received simultaneously, while the...
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