In this paper, the Active Constellation Extension (ACE) technique is applied to Space Frequency Block Coded (SFBC) OFDM systems to reduce the Peak to Average Power Ratio (PAPR). For the extension of this technique to SFBC systems, it will be shown that the space frequency coded signals are the combination of several subframes and that the ACE method may be applied to these subframes. Using this...

The combination of MIMO and OFDM becomes a key standardization work for the downlink channel in 3G Long-Term Evolution (3G-LTE). This paper studies one of the core techniques of 3G-LTE downlink: the coding and decoding schemes in a time-variable multipath environment. It discusses the MIMO schemes for 3G-LTE downlink, the STBC/SFBC, SFTC/STTC and Group layered SFC coding-decoding schemes. This ...

During the Covid-19 pandemic, all space for movement in community was limited, including sekolah, learning carried out online. In online process, number of targets that must be achieved by students results burnout. One way to help overcome bornout can seen from perspective Solution Focus Brief Counseling (SFBC) approach. This research method is a descriptive quantifiable with sample 30 high sch...

In this paper, a performance analysis is presented for space-frequency block coded orthogonal frequency division multiplexing (SFBC-OFDM) and Frequency Switched Transmit Diversity OFDM (FSTD-OFDM) schemes in the 3GPP Long Term Evolution (LTE) system over MIMO fading channels. Analytical expressions for the average BER, average channel capacity and the average throughput of the system are derive...

In this work, we exploit the SVD assisted multiuser transmitter (MUT) and multiuser detector (MUD) technique, using downlink (DL) preprocessing transmitter and DL postprocessing receiver matrice .In combination with space frequency block coding (SFBC). And also propose the precoded DL transmission scheme, were the both proposed schemes take advantage of the channel state information (CSI) of al...

This paper focuses on the implementation and performance analysis of adaptive switching between STBC and SFBC OFDM systems [1].Here in this paper we proposed an adaptive transmission technique for MIMO OFDM systems using adaptive equalization algorithms (ZF,MMSE) where the channel response are unknown a priori and time variant. In this paper two selection criteria, correlation of the channel an...

In this paper, we consider code division multiple access (CDMA) space frequency block coded (SFBC) downlink system and evaluate its performance over independent and identically distributed (i.i.d) Weibull fading channels. Specifically, we drive closed form bit error rate (BER) expressions for the M-ary quadrature amplitude modulation (MQAM) and M-ary phase shift keying (MPSK). We study the outa...

Kualitas Kesehatan mental saat ini mengalami penurunan. Salah satu penyebabnya adalah meningkatkan kecanduan media sosial. Sebagai efek dari diindikasikan munculnya FoMo dikalangan mahasiswa. Penelitian bertujuan untuk mengukur kondisi dan mengkaji perspektif teori Solution Focused Brief Counseling (SFBC). Responden dalam penelitian mahamahasiswa yang berjumlah 50 orang. Instrument digunakan in...

This paper contains the Hadamard Transform in the SLM for the reduction of high peak to average power ratio (PAPR) in MIMOOFDM systems. In this technique, the input sequence is multiplied by a set of phase rotation vectors respectively and then applies the Hadamard Transform to the each resulting sequence based on SFBC. After that perform the Inverse Fast Fourier Transform in order to get the t...