Khoirul Anwar

Telkom University · Department of Telecommunication Engineering

This paper proposes for single carrier signaling a simple structure that combines turbo equalization and decoding of correlated sources in multipath-rich multiuser Rayleigh fading multiple access channels (MAC), where the correlation between the sources is exploited by vertical iterations (VI) between the decoders. The bit-flipping model with a fli...

In relay systems, the probability of errors occurring in the source-relay (S-R) link can be viewed as representing correlation between the source and the relay. This letter proposes a very simple iterative decoding technique, accumulator-assisted distributed turbo code (ACC-DTC) using 2-state (memory-1) convolutional codes (CC), where the correlati...

In this letter, we first of all propose for a parallel wireless sensor network (WSN) a decoding technique that well exploits the correlation knowledge of the sensing data to be transmitted from each sensor to the fusion center (FC). This letter then derives an algorithm to estimate the observation error probabilities, representing the correlation,...

This paper proposes a joint turbo equalization and bit interleaved coded modulation with iterative detection-based interleave division multiple access (IDMA) technique over frequency selective fading channels. The transmission chain's parameters are optimized by using extrinsic information transfer-constrained Binary Switching Algorithm at a very l...

This paper proposes quantum machine learning (QML) to assist fast demapping of low order modulations of future wireless communications beyond the fifth generation (5G), where the 5G new radio (NR) demappers are used as examples since standards for 5G-Advanced and the sixth generation (6G) are still unavailable. We demonstrate that QML circuit can b...

Quantum technology is a candidate for the sixth generation of telecommunications (6G) in 2030. This paper proposes a new quantum coding scheme in the class of Calderbank-Shor-Steane (CSS) codes based on the Reed-Muller codes, since Reed-Muller codes are one of provably classical Shannon Capacity achieving codes. This paper keeps the proposed new co...

Future railway mobile communication system (FRMCS) merupakan sistem pensinyalan kereta cepat berbasis the fifth telecommunication generation new radio (5G NR) third generation partnership project (3GPP) TS 22.289 dan European telecommunication standard institute (ETSI) TR 103 459. Pergerakan kereta yang cepat mengakibatkan kerusakan sinyal akibat a...

The high speed railway technology is one of the important part of future railway system such as future railway mobile communication systems (FRMCS) that is based on the fifth telecommunication generation new radio (5G NR). FRMCS is suffering from the Doppler effect that causes random frequency in the received signal. Doppler effect damages the symb...

Communication systems for high-speed flying vehicles, such as drones and missiles, have an error-floor caused by the Doppler Effect, which causes inter-carrier interference (ICI) and destroys real-time data transmission. Channel coding cannot reduce error-floors, but it is estimated that channel coding can still achieve the turbo-cliff effect. This...

The recently introduced 5G New Radio is the first wireless standard natively designed to support critical and massive machine type communications (MTC). However, it is already becoming evident that some of the more demanding requirements for MTC cannot be fully supported by 5G networks. Alongside, emerging use cases and applications towards 2030 wi...

The multiple access communications for harbor environment are suffering from both low quality transmission due many metallic obstacles and overloaded networks due to the huge number of users/devices of logistic monitoring. This paper proposes a coded random access (CRA) scheme with a degree distribution specially designed to be suitable to harbor e...

This paper focuses on the encoding and decoding of Construction D' coding lattices that can be used with shaping lattices for power-constrained channels. Two encoding methods and a decoding algorithm for Construction D' lattices are given. A design of quasi-cyclic low-density parity-check (QC-LDPC) codes to form Construction D' lattices is presente...

Polar code lattices are formed from binary polar codes using Construction D. In this paper, we propose a design technique for finite-dimension polar code lattices. The dimension $n$ and target probability of decoding error are parameters for this design. To select the rates of the Construction D component codes, rather than using the capacity as in...

Monitoring systems at the harbor require a simple communication technique to save battery energy, strong in error correction, and suitable to the harbor channel model, of which the channel is predicted to have more number of path. This paper proposes (i) a harbor channel model and (ii) a simple iterative repetition coding for harbor wireless commun...

Smart antenna system is one of the most suitable techniques making the sharing between incumbent Fixed Satellite Services (FSS) and the Fifth Telecommunication Generation (5G) possible, because adaptive beamforming can make null the beam towards the FSS earth station. This paper proposes the use of Recursive Least Square (RLS) algorithm for adaptiv...

Communication systems for devices moving at high speed are suffering from error-floor due to the Doppler effect. This paper proposes a simple narrowband communication systems for high speed flying devices for critical applications such as missile and drone. To make the system simple, we consider Repetition codes and slight increase of the number of...

Digital Video Broadcasting Terrestrial{Second Generation (DVB-T2) requires a high coding rate to transmit data of high-quality video. This paper evaluates Bose-Chaudhuri-Hocquenghem (BCH) codes for the DVB-T2 to measure the gain of BCH codes. This paper evaluates the BCH codes as outer coding to be combined with other different inner encoding schem...

Early warning system (EWS) via digital television (TV) in Indonesia is still un-optimal in design and implementation due to the absent of clear standard/guidance to follow across the country. This paper studies various EWS based on digital TV of Japan, Korea, and the United States of America (USA). Although the systems look like different, the EWS...

Polar codes are mathematically proven to achieve the Shannon limit, where the error probability is reduced with the help of frozen bits. Since the frozen bits are detrimental in terms of transmission efficiency, this paper investigates the importance of the frozen bits and the possibility of being replaced by other protected bits via a concatenatio...

The society as a whole, and many vertical sectors in particular, is becoming increasingly digitalized. Machine Type Communication (MTC), encompassing its massive and critical aspects, and ubiquitous wireless connectivity are among the main enablers of such digitization at large. The recently introduced 5G New Radio is natively designed to support b...

Next generation wireless technology require a wide frequency band. Current technology use a frequency of below 3 GHz which cannot provide a wide frequency band due to quite dense frequency utilization. The mm-Wave frequency guarantee to provide a wide band frequency band. The use of mm-Wave frequency will be influenced by climate factors. The chara...

The telecommunication has a tremendous improvement in terms of data rates and bandwidth requiring sufficient frequency allocation and wideband spectrum availability. The millimeter-wave frequency band is one of the solution to these requirements, however communications in this band is facing new challenges on the climate effect to the channel propa...

Abstract The performance of communications is determined by the channel, therefore knowledge of channel model of a country is important. This paper proposes (i) the fifth telecommunication generation (5G) Indonesia channel model and (ii) a framework to derive the channel model of any locations in Indonesia. We consider operating frequency of 3.3 GH...

Perkembangan teknologi sistem komunikasi yang sangat cepat juga berdampak kepada perkembangan sistem pensinyalan kereta cepat di seluruh dunia, termasuk Indonesia. Beragamnya sistem pensinyalan kereta cepat dunia sampai saat ini membuat Indonesia harus menentukan dengan cermat teknologi mana yang paling sesuai dengan kondisi alam Indonesia.Pada jur...

The fifth generation New Radio (5G-NR) is intended to utilize the millimeter wave (mm-Wave) band, which is responsive to conditions. 5G-NR requires channel modeling of where it is applied for optimal implementation, particularly for 5G-NR deployment in Indonesia where the affectability of the tropical condition is predicted to be high especially th...

The railway signalling standardization in the world is developing several technologies for future railway system called the Future Railway Mobile Communication System (FRMCS). This paper studies the technology for Indonesian railway system and the opportunities for interference management to the existing GSM cellular systems. This paper evaluates t...

The fifth telecommunication generation (5G) New Radio (NR) demands excellent modulation to enhance spectral efficiency, where symbol-to-bit mapping rule in constellation diagram must be seriously considered. 5G NR uses Gray modulation that requires high performance coding, where computational complexity is usually high. This Paper proposes new 5G N...

This paper proposed Radio Frequency Profile (RF Profile) of Indonesian digital Television (TV) with Digital Video Broadcasting-Second Generation Terrestrial (DVB-T2) standard for rural Indonesia. This paper used Software New York University Simulator (NYUSIM) with Indonesian environmental parameters to obtain the representative channel model to be...

The fifth generation new radio (5G NR)-based future railway communications system (FRMCS) is planned to replace second generation (2G)-based global system for mobile communications railway (GSM-R), which is not in service in 2030. FRMCS operates at speed above 200 km/h and uses frequency band 873-925 MHz, which are sensitive to Doppler effect and c...

The transportation route in mining areas consists of various complex fields, where reliable communication systems called mining communication system to monitor the transportation is important and urgent. This paper designs a reliable communication system for monitoring transportation in the mining industry by using a channel model that is suitable...

Error correction coding is one of the most important things in wireless communication systems, where the fifth telecommunication generation (5G) New Radio (NR) uses Polar codes as channel coding scheme together with Low Density Parity Check (LDPC) codes. Polar codes are new efficient channel code having high performance with low computational compl...

The world is in the transition from Analog to Digital TV (TV), including Indonesia. Digital TV is capable of transmitting image and sound signals with sharper and clearer reception quality than Analog TV. Digital Video Terrestrial Broadcasting Second Generation (DVB-T2) is one of the Digital TV standards chosen in Indonesia because it provides serv...

This paper reports the recent updates of Prevention and Recovery Networks for Indonesia Natural Disasters based on the Internet-of-Things (PATRIOT-Net) for the first year of total three years. The PATRIOT-Net project is targeting on 7 outcomes: (i) optimal high dense internet of things (IoT) networks, (ii) network coding algorithm for heterogeneous...

This paper reports the recent updates of Preparing Optimal 5G Indonesia Networks (5G-POINT) for the first year of total two years. This project is targeting: (i) the Indonesia fifth generation (5G) of telecommunication channel model, (ii) Theoretical 5G outage performances of Indonesia, and (iii) Framework of 5G channel measurement for any location...

This paper reports the recent updates on Zigzag decodable codes-based Raptor coding for active safety transportation (ZEBRA-CODES) for the first year of total three years. This project is targeting: (1) a decoding schemes ZEBRA-CODES, (2) optimal degree distribution for Raptor coding for transportation, and (3) New modulation scheme suitable for mu...

In this paper, we propose a new access technique to prioritize human over machines for future wireless Internet-of-Things (IoT) networks. This paper develops coded random access (CRA) using repetition codes as a multiple access scheme for ultra high dense networks, which is expected to serve millions of nodes, covering human and machines simultaneo...