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Massive MIMO technology can increase capacity, data rate, and link reliability significantly without additional bandwidth or transmission power. Most of the previous study on Massive MIMO systems are using low frequency (2.6 GHz). This frequency is not suitable for future broadband technology, because IoT devices will use high frequency and possible cell coverage would be smaller. This work proposes...
Millimeter-wave (mm-Wave) Massive Multiple Input Multiple Output (MIMO) at 60 GHz is a candidate of advanced wireless communications for indoor environment. Mm-Wave massive MIMO antenna with lower frequency with sectoring technique has been proposed in previous research. Also dual polarized configuration for MIMO in lower frequency and lower number of antenna. Massive MIMO at 60 GHz mm-Wave is not...
In laptop antenna reception, the received signal frequently experience significant decrease when laptop antenna is located on a deep fading position in multipath environments. In this paper, we propose a method of using parasitic elements to improve the reception of laptop antenna, which can be incorporated (pasted) at the back panel of laptop screen. The proposed antennas have a wide frequency band,...
Changing the value of current amplitude, phase or distance between antenna can make different radiation pattern in antenna array system. Using those principles, a smart antenna system can be made by using butler matrix which has configuration consisting of multiple power combiner and phase shifter. The power divider can be used in order to change the input values (current input) for each port of the...
Rapid development of Broadband Wireless Access (BWA) requires improvement of system capacity. MU-MIMO is considered as a benefit solution as its ability to enhance the system capacity without additional bandwidth. However, the implementation of MU-MIMO creates interference problem that is Multi User Interference (MUI). Thus in order to suppress the MUI, precoding technique is needed before the signal...
In this paper, a new design of an S-band, self phased, planar inverted-F antenna (PIFA) is proposed for low orbit nano satellite application. The antenna consists of Four PIFAs which are arranged in circular array to generate circular polarization antenna. The antenna operates at 2.35 GHz with 107 MHz bandwidth of Return Loss less than −14 dB. Results show that the antenna has circular polarization...
A new method to reconfigure the radiation pattern of a simple circular patch antenna is presented. The antenna consists of a single patch and shorting pins located at edge of patch. By controlling the states of one set of connections between the patch and ground plane using shorting pin, the main lobe of each pattern directs to one of 24 different directions in the plane with the elevation angle of...
Indonesia's Directorate General of Higher Education (DIKTI) has had a concept of Faculty Workload (BKD) and faculty certification program. The implementation of the both program in our college, ITTelkom, is less effective and less able to substantially improve the performance of institutions in general and teachers in particular. The competency of human resources is the main issues being the major...
One of the problems in wireless communication is the availability of frequency spectrum. Currently, the number of frequency bands allocated for telecommunications is very wide. However, the use of the frequency band is not evenly distributed, there is a frequency band that users are too crowded, while others are still rare. This has encouraged the use of cognitive radio (CR). CR is a device that is...
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