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We propose the use of Small Cell Forum application program interface mapped over Radio over Ethernet frames to realize a transport interface for mobile fronthaul where the function of the base stations is split between MAC and PHY layers for 5G mobile with a centralized radio access network configuration. We confirmed that this approach successfully reduced the bandwidth required for the fronthaul...
In this paper we study the problem of increasing the decoding success probability of random linear fountain code over GF (2) for small packet lengths used in delay-intolerant applications such as multimedia streaming. Such code over GF (2) are attractive as they have lower decoding complexity than codes over larger field size, but suffer from high transmission redundancy. In our proposed coding scheme...
The capacity, coverage and interference problems in the infrastructure deployed by mobile operators are increasing due to exponential growth of subscribers and traffic requirements of the new services. In order to solve these problems, 3GPP proposed the Coordinated Multi Point (CoMP) which is a set of cooperative communication techniques between base stations. In this paper we address the decision...
LTE/LTE-A is high speed wireless communication technology which got evolved from 2G/3G. LTE provides very high throughput in uplink and downlink and hence it is attracting more and more subscribers every day. This paper analyzes the performance of real time LTE network of two different LTE service providers through drive test. Test cases were performed under dynamic environment where the test user...
Real-time and robust communication is essential for wireless control systems (WCS). Preambles are considered as significant communication overheads in WCS where payloads are typically small. To shorten the overhead in OFDM systems, previous works have considered fixed subcarrier sampling to obtain subcarrier-fixed short preambles (SFSP) and adopted frequency-direction interpolation (FDI) for channel...
Observed time difference of arrival (OTDOA) is one of the trilateration based positioning techniques adopted in 3rd generation partnership project (3GPP) long term evolution (LTE) release 9. It can estimate user's location by using received time difference of positioning reference signals (PRS) from eNBs. When user detects PRS, quantization error can occur due to low sampling resolution of narrow...
This paper proposes a power amplifier configuration for Massive-MIMO transmitter in 5G era. The proposed configuration consists of the amplifier path and the linear path which correspond to the signal cancellation loop of feed-forward configuration. The amplifier path comprises the vector regulator and the power amplifier, while the linear path comprises the delay line. When the vector regulator adjusts...
Indonesia requires microsatellites for surveillance & remote sensing applications including disaster management such as forest fire, volcanic activity, flood, or even for communication purpose. The first generation Indonesia microsatellite, called LAPAN-A1 (LAPAN-TUBSAT), has been launched on 10th January 2007 as the starting point to further develop microsatellite technology in Indonesia. The...
This paper presents a design and analysis of 4-element MIMO antenna. The proposed MIMO antenna consists of four planar folded dipole antenna elements. This MIMO antenna operates at frequency 2300–2400 MHz (band 40). It is a squared-compact size of 189 × 189 mm2. This work investigates a partial groundplane and a full groundplane to obtain an optimal design. The simulation results show that partial...
Wideband transmission improves the ability of a device to communicate in different scenarios and with a range of devices. Wideband transmission protocols can also make use of multiple bands to implement parallelism and thereby improve throughput. Such transmissions require hardware that is capable of handling wideband signals for both, transmission and reception. The study undertaken in this paper...
This paper proposed a new design of stacked ring rectangular microstrip antenna fed by coplanar waveguide to increase the bandwidth. The results shown that at frequency 2100 MHz the return loss value is −13.23 dB with VSWR 1,553; at frequency 2300 MHz return loss values −15.36 dB with VSWR 1,412 and at frequency 2400 MHz return loss values −29.93 dB with VSWR 1.224. The bandwidth of the proposed antenna...
In a Wireless Body Area Network (WBAN) system, the antenna is located very close to the body surface and the operation causes the antenna characteristic strongly influenced by the electrical properties of body/tissue/skin. Theoretical model of the planar dipole antenna above the human body surface is proposed in this paper. The proposed model is developed based on the transmission line concept on...
This paper discussed about how to design a microstrip antenna for 2.4 GHz of frequency. The microstrip antennas are single patch and array microstrip antenna. After designing single patch antenna based on calculation and optimization, the better one is used for make an array microstrip antenna. There are 5 patches which are connected to each other. After completed the design of antennas, the testing...
We study the secrecy outage performance of a dual-hop multiple relay decode-and-forward (DF) cognitive relay network under the interference constraints in this paper, where all relays and the destination are equipped with Κ antennas. All channels we considered in the proposed system experience the Nakagami-m fading, and the selection combining technique is employed at the antennas of all the main...
In this paper, we present a multiband ultra wideband (UWB) system design to realize the interference suppression and improve the bit transmission rate. With reasonable division of the UWB bandwidth, the multiband UWB scheme can improve the spectrum utilization and also the bit transmission rate through the utilization of the multiple frequency bands to transmit the information bit simultaneously....
This paper deals with the development of X-band array antenna with side lobe suppression implemented using Dolph Chebyshev power distribution. The array antenna which is fed using proximity coupling is intended to work around frequency of 9.3GHz for frequency-modulated continuous-wave (FMCW) radar application. The proposed antenna array consists of 5 microstrip patch antenna elements deployed on a...
Driving needs the driver to be in a proper condition, aware enough of the road to ensure safety. Driving under the influence of alcohol has been one of the worst cause of traffic accidents worldwide. In this paper, we propose a novel system to detect the awareness of car drivers when driving, which is related to driving under alcohol (drunk driving). The system will be installed in Android smartphones...
The emergence of Internet-of-Thing (IoT) has driven tremendous growth of number of connected devices such that in the near future everything is connected to the networks forming super-dense networks. To cope with this challenge, this paper investigates networks with multiple relays serving massive number of devices (users), termed as multiway multirelay (MWMR) networks. Coded random access is adopted...
With the advancements of Internet-of-Things (IoT) and Machine-to-Machine Communications (M2M), the ability to generate massive amount of streaming data from sensory devices in distributed environment is inevitable. A common practice nowadays is to process these data in a high-performance computing infrastructure, such as cloud. Cloud platform has the ability to deploy Hadoop ecosystem on virtual clusters...
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