Preliminary study on the effect of building-induced diffraction upon millimeter wave mobile communications systems with macrodiversity

2018

INFOTEL

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This paper focused at communication system with multipath effects at building environment. The frequency that used for the communication system was 47 GHz. That frequency possibly used for higher bandwidth at communication system. The condition of communication propagation that used was downlink direction. Mobile station placed at track or street with buildings environment condition. This research analysis was based on transmitter power variation, bandwidth variation, and modulation threshold variation. That analysis produced signal to noise ratio value that was obtained from bandwidth variation and transmitter power variation. The transmitter power variation that used was consists of 0.01 Watt, 0.1 Watt, and 1 Watt. Threshold variations for communication modulation that used was consist of 16 QAM and 64 QAM. As the result such as bandwidth variation showed widened of bandwidth then more decreasing of signal to noise ration value, and more increasing of transmitter power then also more increase of signal to noise ratio value

Section: Methodsmentioning

confidence: 99%

Multipath Effects in Building Environment Toward Bandwidth Enhancement for Mobile Communication of 47 GHz Frequency

2018

INFOTEL

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“…Some methods those used were such as single knife edge, Adaptive Modulation and Coding (AMC), Modulation and Coding Scheme (MCS). Single knife edge method was used for diffraction analysis, that method was related with some research such as diffraction influence around building used millimeter wave [11], and multipath effect around building environment [8].…”

Section: Related Workmentioning

confidence: 99%

“…NLOS condition at communication systems can be influenced by mechanism diffraction, such as at this research was discussed about 2.4 GHz frequency for mobile communication systems of tree obstacle [10], and diffraction upon building at mobile communication systems was using millimeter wave [11]. Some research about modulation adaptive mechanism was consists of segmentation area strategic for adaptive transmission at fixed cellular communication was using 30 GHz [12].…”

Section: Introductionmentioning

confidence: 99%

Adaptive Modulation and Coding (AMC) around Building Environment for MS Communication at The Train

2018

emitter

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This paper focused at communication systems when train moved. The communication propagation was influenced by building environment. The communication condition that used uplink direction. Mobile station was placed inside the train where moved with 500 km/hour velocity. The analysis was used consists of Doppler effect, atmospheric, and building environment. The variation communication frequency was used consists of 2.6 GHz, 5 GHz, and 10 GHz. Diffraction mechanism caused building was used single knife edge method. The result was showed SNR value from the communication frequency variation, distance comparison between LOS and NLOS, alteration adaptive modulation and coding (AMC), and coverage area percentage. Modulation and Coding Scheme (MCS) was used for AMC consists of QPSK, 16 QAM, and 64 QAM. Decreases of SNR value can be occured when communication distance for NLOS condition farther then LOS condition. That distance became increases because was obstructed with high building. Changeable of AMC value was caused propagation condition. The coverage area percentage when communication frequency that was used consists of 2.6 GHz, 5 GHz, and 10 GHz was obtained 88.4%, 88.4%, and 81.7%.

“…The build ing caused the diffraction mechanism . Some research was related to that diffraction, such as mobile communication systems with diffraction propagation around the building environment [7], and mobile communication systems were influenced by a tree that used Giovanelli Kn ife Edge method with 2.3 GHz frequency [8]. Some research was related to OFDM at mobile communication systems such as OFDM and OFDMA with DFT based [9], ed ge windowing for communication systems with OFDM based [10], and algorithm allocation for OFDM systems [11].…”

Section: Introductionmentioning

confidence: 99%

The Communication System of Building from Outdoor to Indoor with AMC at 10 GHz

2020

INFOTEL

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The propagation model of communication systems was used propagation from outdoor to indoor of building. In the inside that building used partition with brick. That propagation condition used downlink condition from mobile station side. The communication frequency used 10 GHz. Some parameter variation was used in this research such as radio base station coverage, mobile station location of building, and code rate communication. The coverage variation of radio base station used femtocell and picocell. As the result described signal to noise ratio (SNR)at every node communication, adaptive modulation and coding (AMC) variation, and coverage area percentage in the building. The modulation and coding scheme (MCS) was used consist of QPSK, 16 QAM, and 64 QAM