Basuki Priyanto | Aalborg University (original) (raw)
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Papers by Basuki Priyanto
Vehicular Technology Conference, 2007
Attenuation due to rain is primary cause of communication impairment on satelite-earth paths, esp... more Attenuation due to rain is primary cause of communication impairment on satelite-earth paths, especially above 10 GHz. Since heavy rain is spatially inhomogeneous, the use of two or more separate receiving sites, i.e. site diversity is an effective means of ameliorating attenuation to overcome severe rain fading in any climate. This paper present the scenario performance evaluation of MAN-based site diversity for VSAT networks in urban areas by using spatial-temporal rainfall modeling. Our simulation shows, that linking VSAT in this way will not only provide an interactive network for user, but also enable substantially higher availability than one VSAT operates in isolation during rain periods.
vehicular technology conference, 2008
personal indoor and mobile radio communications, 2006
Orthogonal Frequency Division Multiple Access (OFDMA) and Single-Carrier FDMA (SC-FDMA) are the k... more Orthogonal Frequency Division Multiple Access (OFDMA) and Single-Carrier FDMA (SC-FDMA) are the key air interfaces to achieve high spectral efficiency for UTRA Long Term Evolution (LTE) system, which is also known as the beyond 3rd generation (B3G) system. The selection of air interface techniques is influenced by the RF transmitter constraints, i.e. the hardware imperfections. The RF transmitter imperfections create in-band performance degradation and increase the out-of-band emissions. The latter can lead to violate Spectral Emission Mask (SEM) and Adjacent Channel Leakage Ratio (ACLR) requirements. This thesis deals with the air interface design of beyond 3G systems to achieve high spectral efficiency, and the impact of the imperfections on both performance and the transmitter requirements.
There is an increasing demand for single user equipment (UE) supporting multi standards in third ... more There is an increasing demand for single user equipment (UE) supporting multi standards in third generation communication systems and beyond. Nevertheless, integrating several standards in one UE increases the front-end design complexity due to the coexistence of several systems. This paper investigates one of these issues which is the signal interference between UMTS and WLAN applications. By considering the system issues, multi-standard operation and interfering effects in a multi-standard transceiver supporting UMTS and WLAN, the receiver requirements have been derived based on the existing 3GPP specifications. The derived constrains are generally valid for all types of receiver architectures. Therefore, they are applicable for selection of components such as LNAs and filters in a multi-standard receiver front-end regardless of the chosen architecture.
Positioning is an essential feature in Narrow-Band Internet-of-Things (NB-IoT) systems. Observed ... more Positioning is an essential feature in Narrow-Band Internet-of-Things (NB-IoT) systems. Observed Time Difference of Arrival is one of the supported positioning techniques for NB-IoT. It utilizes the downlink NB positioning reference signal (NPRS) generated based on a length-31 Gold sequence. Although a Gold sequence has good auto-correlation and cross-correlation properties, the correlation properties of NPRS in NB-IoT are still sub-optimal. The reason is mainly due to two facts: the number of NPRS symbols in each subframe is limited, and the featured sampling-rate is low. In this paper, we propose to modify the NPRS generation by exploiting the cross-correlation function of the NPRS. That is, for each orthogonal frequency division multiplexing (OFDM) symbol we generate the first NPRS symbol as specified in the current standard, i.e., a Gold sequence; while the second OFDM symbol is set to the additive inverse of the first one. Our simulation results show that the proposed NPRS sequ...
The present invention relates to a method in a direct conversion receiver for estimating and remo... more The present invention relates to a method in a direct conversion receiver for estimating and removing DC offset, said direct conversion receiver being arranged to receive radio communication signals in a wireless communication system, the method comprising the steps of: receiving and down sampling time domain signals, wherein said time domain signals comprise at least one first synchronisation signal; estimating a residual DC offset Δd based on said at least one first synchronisation signal; computing a refined DC offset estimation d̃ based on said estimated residual DC offset Δd; and applying said refined DC offset estimation d̃ on said time domain signals so as to remove DC offset from said time domain signals. Furthermore, the invention also relates to a receiver device, a computer program, and a computer program product thereof.
Recently, IEEE 802.11ax Task Group has adapted OFDMA as a new technique for enabling multi-user t... more Recently, IEEE 802.11ax Task Group has adapted OFDMA as a new technique for enabling multi-user transmission. It has been also decided that the scheduling duration should be same for all the users in a multi-user OFDMA so that the transmission of the users should end at the same time. In order to realize that condition, the users with insufficient data should transmit null data (i.e. padding) to fill the duration. While this scheme offers strong features such as resilience to Overlapping Basic Service Set (OBSS) interference and ease of synchronization, it also poses major side issues of degraded throughput performance and waste of devices' energy. In this work, for OFDMA based 802.11 WLANs we first propose practical algorithm in which the scheduling duration is fixed and does not change from time to time. In the second algorithm the scheduling duration is dynamically determined in a resource allocation framework by taking into account the padding overhead, airtime fairness and ...
2003 IEEE Pacific Rim Conference on Communications Computers and Signal Processing (PACRIM 2003) (Cat. No.03CH37490)
Page 1. Design & Implementation of All Digital IQ Modulator and Demodulator for High ... more Page 1. Design & Implementation of All Digital IQ Modulator and Demodulator for High Speed WLAN in FPGA Basuki Endah F'riyanto, Choi Look Law, Yong Liang Guan Positioning & Wireless Technology Centre Nanyang Technological ...
2014 IEEE 25th Annual International Symposium on Personal, Indoor, and Mobile Radio Communication (PIMRC), 2014
of the copyright holder. To my wife Dina and my parents. “ Whoever treads a path seeking knowledg... more of the copyright holder. To my wife Dina and my parents. “ Whoever treads a path seeking knowledge therein, Allah directs him to a path leading to paradise.”-Sahih Muslim Hadith-Summary
Abstract—There is an increasing demand for single user equipment (UE) supporting multi standards ... more Abstract—There is an increasing demand for single user equipment (UE) supporting multi standards in third generation communication systems and beyond. Nevertheless, integrating several standards in one UE increases the front-end design complexity due to the coexistence of several systems. This paper investigates one of these issues which is the signal interference between UMTS and WLAN applications. By considering the system issues, multi-standard operation and interfering effects in a multi-standard transceiver supporting UMTS and WLAN, the receiver requirements have been derived based on the existing 3GPP specifications. The derived constrains are generally valid for all types of receiver architectures. Therefore, they are applicable for selection of components such as LNAs and filters in a multi-standard receiver front-end regardless of the chosen architecture. I.
Document Version Publisher's PDF, also known as Version of record Link to publication from A... more Document Version Publisher's PDF, also known as Version of record Link to publication from Aalborg University Citation for published version (APA):
Vehicular Technology Conference, 2007
Attenuation due to rain is primary cause of communication impairment on satelite-earth paths, esp... more Attenuation due to rain is primary cause of communication impairment on satelite-earth paths, especially above 10 GHz. Since heavy rain is spatially inhomogeneous, the use of two or more separate receiving sites, i.e. site diversity is an effective means of ameliorating attenuation to overcome severe rain fading in any climate. This paper present the scenario performance evaluation of MAN-based site diversity for VSAT networks in urban areas by using spatial-temporal rainfall modeling. Our simulation shows, that linking VSAT in this way will not only provide an interactive network for user, but also enable substantially higher availability than one VSAT operates in isolation during rain periods.
vehicular technology conference, 2008
personal indoor and mobile radio communications, 2006
Orthogonal Frequency Division Multiple Access (OFDMA) and Single-Carrier FDMA (SC-FDMA) are the k... more Orthogonal Frequency Division Multiple Access (OFDMA) and Single-Carrier FDMA (SC-FDMA) are the key air interfaces to achieve high spectral efficiency for UTRA Long Term Evolution (LTE) system, which is also known as the beyond 3rd generation (B3G) system. The selection of air interface techniques is influenced by the RF transmitter constraints, i.e. the hardware imperfections. The RF transmitter imperfections create in-band performance degradation and increase the out-of-band emissions. The latter can lead to violate Spectral Emission Mask (SEM) and Adjacent Channel Leakage Ratio (ACLR) requirements. This thesis deals with the air interface design of beyond 3G systems to achieve high spectral efficiency, and the impact of the imperfections on both performance and the transmitter requirements.
There is an increasing demand for single user equipment (UE) supporting multi standards in third ... more There is an increasing demand for single user equipment (UE) supporting multi standards in third generation communication systems and beyond. Nevertheless, integrating several standards in one UE increases the front-end design complexity due to the coexistence of several systems. This paper investigates one of these issues which is the signal interference between UMTS and WLAN applications. By considering the system issues, multi-standard operation and interfering effects in a multi-standard transceiver supporting UMTS and WLAN, the receiver requirements have been derived based on the existing 3GPP specifications. The derived constrains are generally valid for all types of receiver architectures. Therefore, they are applicable for selection of components such as LNAs and filters in a multi-standard receiver front-end regardless of the chosen architecture.
Positioning is an essential feature in Narrow-Band Internet-of-Things (NB-IoT) systems. Observed ... more Positioning is an essential feature in Narrow-Band Internet-of-Things (NB-IoT) systems. Observed Time Difference of Arrival is one of the supported positioning techniques for NB-IoT. It utilizes the downlink NB positioning reference signal (NPRS) generated based on a length-31 Gold sequence. Although a Gold sequence has good auto-correlation and cross-correlation properties, the correlation properties of NPRS in NB-IoT are still sub-optimal. The reason is mainly due to two facts: the number of NPRS symbols in each subframe is limited, and the featured sampling-rate is low. In this paper, we propose to modify the NPRS generation by exploiting the cross-correlation function of the NPRS. That is, for each orthogonal frequency division multiplexing (OFDM) symbol we generate the first NPRS symbol as specified in the current standard, i.e., a Gold sequence; while the second OFDM symbol is set to the additive inverse of the first one. Our simulation results show that the proposed NPRS sequ...
The present invention relates to a method in a direct conversion receiver for estimating and remo... more The present invention relates to a method in a direct conversion receiver for estimating and removing DC offset, said direct conversion receiver being arranged to receive radio communication signals in a wireless communication system, the method comprising the steps of: receiving and down sampling time domain signals, wherein said time domain signals comprise at least one first synchronisation signal; estimating a residual DC offset Δd based on said at least one first synchronisation signal; computing a refined DC offset estimation d̃ based on said estimated residual DC offset Δd; and applying said refined DC offset estimation d̃ on said time domain signals so as to remove DC offset from said time domain signals. Furthermore, the invention also relates to a receiver device, a computer program, and a computer program product thereof.
Recently, IEEE 802.11ax Task Group has adapted OFDMA as a new technique for enabling multi-user t... more Recently, IEEE 802.11ax Task Group has adapted OFDMA as a new technique for enabling multi-user transmission. It has been also decided that the scheduling duration should be same for all the users in a multi-user OFDMA so that the transmission of the users should end at the same time. In order to realize that condition, the users with insufficient data should transmit null data (i.e. padding) to fill the duration. While this scheme offers strong features such as resilience to Overlapping Basic Service Set (OBSS) interference and ease of synchronization, it also poses major side issues of degraded throughput performance and waste of devices' energy. In this work, for OFDMA based 802.11 WLANs we first propose practical algorithm in which the scheduling duration is fixed and does not change from time to time. In the second algorithm the scheduling duration is dynamically determined in a resource allocation framework by taking into account the padding overhead, airtime fairness and ...
2003 IEEE Pacific Rim Conference on Communications Computers and Signal Processing (PACRIM 2003) (Cat. No.03CH37490)
Page 1. Design & Implementation of All Digital IQ Modulator and Demodulator for High ... more Page 1. Design & Implementation of All Digital IQ Modulator and Demodulator for High Speed WLAN in FPGA Basuki Endah F'riyanto, Choi Look Law, Yong Liang Guan Positioning & Wireless Technology Centre Nanyang Technological ...
2014 IEEE 25th Annual International Symposium on Personal, Indoor, and Mobile Radio Communication (PIMRC), 2014
of the copyright holder. To my wife Dina and my parents. “ Whoever treads a path seeking knowledg... more of the copyright holder. To my wife Dina and my parents. “ Whoever treads a path seeking knowledge therein, Allah directs him to a path leading to paradise.”-Sahih Muslim Hadith-Summary
Abstract—There is an increasing demand for single user equipment (UE) supporting multi standards ... more Abstract—There is an increasing demand for single user equipment (UE) supporting multi standards in third generation communication systems and beyond. Nevertheless, integrating several standards in one UE increases the front-end design complexity due to the coexistence of several systems. This paper investigates one of these issues which is the signal interference between UMTS and WLAN applications. By considering the system issues, multi-standard operation and interfering effects in a multi-standard transceiver supporting UMTS and WLAN, the receiver requirements have been derived based on the existing 3GPP specifications. The derived constrains are generally valid for all types of receiver architectures. Therefore, they are applicable for selection of components such as LNAs and filters in a multi-standard receiver front-end regardless of the chosen architecture. I.
Document Version Publisher's PDF, also known as Version of record Link to publication from A... more Document Version Publisher's PDF, also known as Version of record Link to publication from Aalborg University Citation for published version (APA):