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All Journal Transmisi: Jurnal Ilmiah Teknik Elektro Mechatronics, Electrical Power, and Vehicular Technology e-Jurnal Arus Elektro Indonesia EMITTER International Journal of Engineering Technology Briliant: Jurnal Riset dan Konseptual JOIV : International Journal on Informatics Visualization Jurnal Inovasi Hasil Pengabdian Masyarakat (JIPEMAS) Publikasi Hasil Pengabdian Kepada Masyarakat. Jurnal ELTEK
I Gede Puja Astawa
Electronics Engineering Polytechnic Institute of Surabaya
Humanities Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Education Electrical & Electronics Engineering Engineering Other

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Sistem monitoring kualitas udara sebagai media edukasi kesadaran lingkungan bagi masyarakat perkotaan Nadziroh, Faridatun; Sa'adah, Nihayatus; Aswoyo, Budi; Astawa, I Gede Puja; Puspitorini, Okkie; Santoso, Tri Budi; Ridwan, Mohamad; Wijayanti, Ari; Kurniajaya, Moga; Wahyu, Gilang Arya; Yudha, Kurniawan Try; Raihan, Dafa; Salwadilla, Ika Shafira
Jurnal Inovasi Hasil Pengabdian Masyarakat (JIPEMAS) Vol 8 No 2 (2025)
Publisher : University of Islam Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33474/jipemas.v8i2.23491

Abstract

Permasalahan kualitas udara di kawasan perkotaan semakin serius akibat pembangunan, industrialisasi, dan padatnya jumlah penduduk. Masalah ini berdampak pada kesehatan masyarakat, seperti penyakit pernapasan dan gangguan jantung. Pengabdian masyarakat ini bertujuan memberikan informasi akurat tentang kondisi udara perkotaan dan meningkatkan kesadaran masyarakat akan pentingnya menjaga kualitas lingkungan. Sistem pemantauan kualitas udara berbasis teknologi dikembangkan menggunakan sensor multi-in-one RK300-08, yang mengukur berbagai parameter polusi udara, seperti karbon monoksida (CO), ozon (O₃), sulfur dioksida (SO₂), nitrogen dioksida (NO₂), serta partikel debu halus (PM2.5) dan lebih besar (PM10). Data pemantauan diproses dengan mikrokontroler ESP32 dan ditampilkan real-time melalui dasbor web yang dapat diakses masyarakat. Sensor ini dipilih karena kemampuannya yang komprehensif untuk mengukur parameter udara yang berbahaya bagi kesehatan. Hasil implementasi menunjukkan bahwa informasi yang diberikan cepat, akurat, dan terintegrasi, lebih efisien dibandingkan metode konvensional seperti Indeks Standar Pencemaran Udara (ISPU) yang tidak memberikan informasi waktu nyata. Evaluasi dampak sosial menunjukkan peningkatan kesadaran masyarakat yang lebih proaktif dalam mengambil langkah preventif, seperti mengurangi aktivitas luar ruangan saat udara buruk. Dengan sistem ini, masyarakat dapat berpartisipasi langsung dalam pemantauan lingkungan, mendukung terciptanya lingkungan yang lebih sehat dan berkelanjutan, serta menunjukkan potensi teknologi IoT dalam mengatasi masalah lingkungan di kawasan padat penduduk.
Implementasi Sistem Transmisi Gambar Menggunakan Teknologi OFDM Berbasis Software Defined Radio dengan Perangkat USRP Prihantono, Prihantono; Astawa, I Gede Puja; Santoso, Tri Budi
BRILIANT: Jurnal Riset dan Konseptual Vol 10 No 4 (2025): Volume 10 Nomor 4, November 2025
Publisher : Universitas Nahdlatul Ulama Blitar

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.28926/briliant.v10i4.1984

Abstract

In this decade, Orthogonal Frequency Division Multiplexing (OFDM) technology has been widely applied in various modern wireless communication systems.  OFDM is used to provide high-speed data transmission that is resistant to multipath interference and offers relatively high spectrum efficiency. In this study, an OFDM system prototype equipped with a Huffman Encoder and Decoder, Convolutional Coder, and Viterbi decoder was developed. The OFDM system that has been created is implemented using a Universal Software Radio Peripheral (USRP) device to transmit image data. From the test results, it was found that the OFDM system that has been created and implemented using USRP is capable of transmitting image data well. From visual observation, there were no errors in receiving the transmitted image data. The image received at the receiver was the same shape and size as the image transmitted by the transmitter. The received image was clear, with no image defects such as scratches or mosaics at the measurement distance. A Signal to Noise Ratio (SNR) of more than 30 dB was obtained under line of sight conditions with a measurement distance of 60 cm between the transmitter and receiver. The SNR decreased gradually with increasing measurement distance, reaching approximately 27 dB at a measurement distance of 300 cm between the transmitter and receiver.
A Combination of PD Controller and PIAFC for Stabilization of “x” Configuration Quadcopter Tamami, Niam; Pitowarno, Endra; Astawa, I Gede Puja
EMITTER International Journal of Engineering Technology Vol 2 No 1 (2014)
Publisher : Politeknik Elektronika Negeri Surabaya (PENS)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24003/emitter.v2i1.13

Abstract

This paper presents a stabilization control method for “x” configuration quadcopter. The control method used the combination of PD (Proportional Derivative) controller and PIAFC (Proportional Integral Active Force Control). PD is used to stabilize quadcopter, and PIAFC is used to reject uncertainty disturbance (e.g. wind) by estimating disturbance torque value of quadcopter. The PD with PIAFC provided better result where PIAFC could minimize uncertain disturbance effect. The simulation has successfully give comparation about controller performance (PD, PD-AFC, PD-PIAFC) by calculate RMS (Root Mean Square) value. PD with AFC gives better result than PD. AFC optimization using PI (PD-PIAFC) give best result if compared with PD or PD-AFC. PD-PIAFC has lowest RMS value of result control signal, 0.0389 for constant disturbance and 0.1008 for fluctuated disturbance.Keywords:“x” configuration quadcopter, stability, PD, PIAFC.
Performance Analysis of an OFDM PHY Scheme with Zero Forcing Equalizer Using Software Defined Radio Platform and USRP Zainudin, Ahmad; Sudarsono, Amang; Astawa, I Gede Puja
EMITTER International Journal of Engineering Technology Vol 2 No 1 (2014)
Publisher : Politeknik Elektronika Negeri Surabaya (PENS)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24003/emitter.v2i1.15

Abstract

We present an implementation of Zero Forcing (ZF) equalizer in OFDM scheme using Software Defined Radio platform whereas NI USRP-2920 as the Radio Frequency (RF) front-end. ZF equalizer is employed to achieve reliable system at the receiver. Center frequency used for data transmission is 915 MHz. The reliability transmission and the performance of ZF equalizer are measured in term of different symbol mapping (i.e., M-PSK and M-QAM). The IQ rate determines the bandwidth available, whereas good performance is achieved with IQ rate less than 1 MHz.ZF equalizer achieves good performance when using BPSK, QPSK and 16-QAM modulation techniques. By applying ZF equalizer, bit error on BPSK and QPSK modulations can be reduced from 29,16% and 39,06% into 0%. This advantage of ZF equalizer also is able to press the bit error on 16- QAM and 64-QAM modulations into 3,125% and 8,85%, respectively.Keywords: OFDM,SDR, USRP,Zero Forcing Equalizer
Implementation of Energy Efficiency Based on Time Scheduling to Improve Network Lifetime in Wireless Body Area Network (WBAN) ., Subono; Al Rasyid, M. Udin Harun; Astawa, I Gede Puja
EMITTER International Journal of Engineering Technology Vol 3 No 2 (2015)
Publisher : Politeknik Elektronika Negeri Surabaya (PENS)

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (322.541 KB) | DOI: 10.24003/emitter.v3i2.43

Abstract

ZigBee applications of IEEE 802.15.4 Wireless Sensor Network (WSN) with Low Rate Wireless Personal Area Network (LR-WPAN) can be integrated with e-health technology Wireless Body Area Network (WBAN). WBAN are small size and can communicate quickly making it easier for people to obtain information accurately.WBAN has a variety of functions that can help human life. It can be used in the e-health, military and sports. WBAN has the potential to be the future of wireless communication solutions. WBAN use battery as its primary power source. WBAN has limited energy and must be able to save energy consumption in order to operate for a long time. In this study, we propose a method of time scheduling called cycle sleep period (CSP) as WBAN solutions to save energy and improve energy efficiency. The CSP method is implemented in the real hardware testbed using sensor e-health includes temperature body and current sensor. We compared the performance of CSP method with duty cycle management (DCM) time scheduling-based and without using time scheduling.From the measurement results, our proposed idea has decreasingenergy consumption.Keywords: WSN, LR-WPAN, WBAN, e-health, Time Scheduling
An Implementation of Error Minimization Data Transmission in OFDM using Modified Convolutional Code Briantoro, Hendy; Astawa, I Gede Puja; Sudarsono, Amang
EMITTER International Journal of Engineering Technology Vol 3 No 2 (2015)
Publisher : Politeknik Elektronika Negeri Surabaya (PENS)

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (363.575 KB) | DOI: 10.24003/emitter.v3i2.44

Abstract

This paper presents about error minimization in OFDM system. In conventional system, usually using channel coding such as BCH Code or Convolutional Code. But, performance BCH Code or Convolutional Code is not good in implementation of OFDM System. Error bits of OFDM system without channel coding is 5.77%. Then, we used convolutional code with code rate 1/2, it can reduce error bitsonly up to 3.85%. So, we proposed OFDM system with Modified Convolutional Code. In this implementation, we used Software Define Radio (SDR), namely Universal Software Radio Peripheral (USRP) NI 2920 as the transmitter and receiver. The result of OFDM system using Modified Convolutional Code with code rate is able recover all character received so can decrease until 0% error bit. Increasing performance of Modified Convolutional Code is about 1 dB in BER of 10-4 from BCH Code and Convolutional Code. So, performance of Modified Convolutional better than BCH Code or Convolutional Code.Keywords: OFDM, BCH Code, Convolutional Code, Modified Convolutional Code, SDR, USRP
Covert Communication in MIMO-OFDM System Using Pseudo Random Location of Fake Subcarriers Hudhajanto, Rizky Pratama; Astawa, I Gede Puja; Sudarsono, Amang
EMITTER International Journal of Engineering Technology Vol 4 No 1 (2016)
Publisher : Politeknik Elektronika Negeri Surabaya (PENS)

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (348.785 KB) | DOI: 10.24003/emitter.v4i1.58

Abstract

Multiple-Input Multiple-Output Orthogonal Frequency Division Multiplexing (MIMO-OFDM) is the most used wireless transmission scheme in the world. However, its security is the interesting problem to discuss if we want to use this scheme to transmit a sensitive data, such as in the military and commercial communication systems. In this paper, we propose a new method to increase the security of MIMO-OFDM system using the change of location of fake subcarrier. The fake subcarriers’ location is generated per packet of data using Pseudo Random sequence generator. The simulation results show that the proposed scheme does not decrease the performance of conventional MIMO-OFDM. The attacker or eavesdropper gets worse Bit Error Rate (BER) than the legal receiver compared to the conventional MIMO-OFDM system.
Performance Analysis of CP-Based and CAZAC Training Sequence-Based Synchronization in OFDM System Yudha, R. Gaguk Pratama; Astawa, I Gede Puja; Sudarsono, Amang
EMITTER International Journal of Engineering Technology Vol 4 No 2 (2016)
Publisher : Politeknik Elektronika Negeri Surabaya (PENS)

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (363.5 KB) | DOI: 10.24003/emitter.v4i2.146

Abstract

Orthogonal Frequency Division Multiplexing (OFDM) is a popular wireless data transmission scheme. However, its synchronization is still being a major problem when it is applied in real hardware. Cyclic Prefix (CP) based synchronization is one of the solutions in this problem, but CP has high crest factor. In the other hand, CAZAC sequence is another solution with lower crest factor but the higher complexity and also CAZAC has potential in security and channel estimation implementation. The performance between CP and CAZAC sequence based synchronization in OFDM system is analyzed in this paper. The real hardware, Universal Software Rado Peripheral (USRP), is used to prove the analysis. The CAZAC sequence has 10% performance increased in frequency offset than CP based synchronization.
Performance Analysis of Circular 8-QAM Constellation with MMSE Equalizer for OFDM System Using USRP Taufiqurrahman, Muh. Alfan; Astawa, I Gede Puja; Sudarsono, Amang
EMITTER International Journal of Engineering Technology Vol 4 No 2 (2016)
Publisher : Politeknik Elektronika Negeri Surabaya (PENS)

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1974.161 KB) | DOI: 10.24003/emitter.v4i2.148

Abstract

Bandwidth is very important in communication system, and it is a limited resource. In order to save the limited bandwidth resource, high order M-ary modulation is widely employed in modern communication and broadcasting systems. In Orthogonal Frequency Division Multiplexing (OFDM), fading environment lead to a loss of orthogonality between the subcarriers. In this paper, we present the performance analysis of circular 8-Quadrature Ampilutude Modulation (QAM) constellation for Orthogonal Frequency Division Multiplexing (OFDM) system. We also combine the system with Minimum Mean Square Error (MMSE) equalizer to mitigate the effect of Inter Symbol Interference (ISI). Then, all of this system is implemented practically using Universal Software Radio Peripheral (USRP). The performance of circular 8-QAM and MMSE equalizer is evaluated by comparing with other 8-QAM modulation models such as circular-Zero Forcing (ZF), star-ZF, Square-ZF, Star-MMSE, and Square-MMSE. The performance of circular 8-QAM with MMSE equalizer is  better than the other combinations. Bit Error Rate (BER) graph shows that the performance of circular-MMSE is better than star-MMSE. The performance improvement using circular-MMSE is about 1.6%. The performance will decrease when the distance is increased. The performance of this system is greatly affected by the distance between transmitter and receiver.
Performance Analysis of Video Transmission Using Sequential Distortion Minimization Method for Digital Video Broadcasting Terrestrial Astin, Novita; Astawa, I Gede Puja; Sudarsono, Amang
EMITTER International Journal of Engineering Technology Vol 4 No 2 (2016)
Publisher : Politeknik Elektronika Negeri Surabaya (PENS)

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (479.593 KB) | DOI: 10.24003/emitter.v4i2.150

Abstract

This paper presents about the transmission of Digital Video Broadcasting system with streaming video resolution 640x480 on different IQ rate and modulation. In the video transmission, distortion often occurs, so the received video has bad quality. Key frames selection algorithm is flexibel on a change of video, but on these methods, the temporal information of a video sequence is omitted. To minimize distortion between the original video and received video, we aimed at adding methodology using sequential distortion minimization algorithm. Its aim was to create a new video, better than original video without significant loss of content between the original video and received video, fixed sequentially. The reliability of video transmission was observed based on a constellation diagram, with the best result on IQ rate 2 Mhz and modulation 8 QAM. The best video transmission was also investigated using SEDIM (Sequential Distortion Minimization Method) and without SEDIM. The experimental result showed that the PSNR (Peak Signal to Noise Ratio) average of video transmission using SEDIM was an increase from 19,855 dB to 48,386 dB and SSIM (Structural Similarity) average increase 10,49%. The experimental results and comparison of proposed method obtained a good performance. USRP board was used as RF front-end on 2,2 GHz.
Co-Authors Abd. Rasyid Syamsuri Ahmad Zainudin Amang Sudarsono, Amang Anang Budikarso, Anang Anang Siswanto, Anang Anisah, Ida Ari Wijayanti Aries Pratiarso, Aries Arifin Arifin Astin, Novita Astin, Novita Budi Aswoyo, Budi Endra Pitowarno Gulo, Melki Mario Gunawan, M. Wisnu Hadi, Mochammad Zen Samsono Hendy Briantoro Hudhajanto, Rizky Pratama Hudhajanto, Rizky Pratama Kurniajaya, Moga M Udin Harun Al Rasyid, M Udin Harun Mahendra, Trisna Agung Mala Nurilmala Mike Yuliana Mohamad Ridwan Nadia, Ninda Syafa Ainun Nadziroh, Faridatun Niam Tamami Ni’am Tamami, Ni’am Ningsih, Norma Okkie Puspitorini, Okkie Priambodo, Naufal Ammar Prihantono, Prihantono Prima Kristalina Putra, Adam Surya Raihan, Dafa Ramadhani, Afifah Dwi Sa'adah, Nihayatus Salwadilla, Ika Shafira Satiti, Rini Sa’adah, Nihayatus Subono ., Subono Taufiqurrahman, Muh. Alfan Taufiqurrahman, Muh. Alfan Tri Budi Santoso Wahyu, Gilang Arya Yoedy Moegiharto, Yoedy Yudha, Kurniawan Try Yudha, R. Gaguk Pratama Yudha, R. Gaguk Pratama