Abstract:
Long Term Evolution (LTE) has been investigated, because of high
data rate, low latency and packet optimized radio access technology. While
orthogonal frequency division multiple accesses (OFDMA) is used in
multiplexing, the main drawback of OFDMA is high peak to average
power ratio (PAPR) properties of an OFDMA signal, resulting in worse
uplink coverage. Thus SC-FDMA (Single Carrier Frequency Division
Multiple Access) is suggested using LTE uplink, which presents better
PAPR properties compared to OFDMA signal. But In uplink transmission,
the user equipment (UE) causes the interference to other neighbor cell, this
degrades the cell performance, therefore close loop power control (CLPC)
and open loop power control (OLPC) are suggested and modeled to solve
this problem. In the OLPC, the signal strength UE which reach to neighbor
cell is considered to set transmit power. In CLPC the adjustment of power
control (PC) command continuously and then set transmit power. The main
contribution of this research focuses on the affect of OLPC and CLPC in
the bit error rate (BER). The simulation is achieved using MATLAB and
the results showed that, at signal to noise ratio (SNR) 25dB, the OLPC and
CLPC given typical BER of (10 ). In term of the power, the OLPC
consumes much power as compared to CLPC. Compared when the SNR
less than 10dB, the OLPC achieves better results as compared to CLPC;
otherwise the CLPC gives better results.
