| Title |
SDR Implementation of Alamouti-coded FBMC and Performance analysis of Indoor Application |
| Authors |
장상민(Sangmin Jang) ; 라동준(Dongjun Na) ; 최권휴(Kwonhue Choi) |
| DOI |
https://doi.org/10.5573/ieie.2020.57.4.13 |
| Keywords |
FBMC; OFDM; Alamouti code; MISO system; SDR |
| Abstract |
Filter Bank Multicarrier with Offset QAM (FBMC/OQAM) results in an Inter Carrier Interference (ICI) between transmit antennas due to the characteristics of the OQAM structure. Several schemes have been studied to solve this problem. Recently, Frequency-Reversal Alamuti Coded FBMC (FRAC-FBMC) was proposed. FRAC-FBMC was shown to be close to the Bit Error Rate (BER) performance of a system without an ICI in the case of short multipath delay. However, the performance simulation results with theoretical channel model may differ from the experimental results in the actual communication environment. Therefore, we performed BER performance measurements of FRAC-FBMC in actual wireless channel and analyzed the measurement results. For performance measurements, we used Universal Software Radio Peripheral (USRP), a Software-Defined Radio (SDR) device. Therefore, we performed BER performance measurement of FRAC-FBMC in actual wireless channel and analyzed the measurement results. For performance measurements, we used Universal Software Radio Peripheral (USRP), one of the software-defined radio (SDR) devices. Conventional studies that analyze actual wireless channels are limited in analyzing the frequency characteristics in various aspects because they are limited to measuring channel parameters such as path loss over distance and channel delay spread values. To complement the limitations of conventional studies, we analyzed frequency characteristics according to system parameters such as carrier frequency, transmit power, and bandwidth in None-line-of-sight (NLoS) and Line-of-sight (LoS) channels. In addition, we analyzed the system parameter to obtain stable received signal in indoor wireless environment. Simulation results show that if the carrier frequency band and the number of subcarriers are low, the BER performance of the FRAC-FBMC system achieves near ICI-free system. In conclusion, in this paper, the performance of the FRAC-FBMC system in the actual radio environment has been verified to confirm the potential for future applications to actual communication systems. |