MIMO PERFORMANCE ON Wi-MAX NETWORKS FOR DIFFERENT MODULATION SCHMES
| Author(s) | : | R Bhagya, Dr. A G Ananth |
| Institution | : | Assisitant Professor, Department of Telecommunication Eng., RVCE |
| Published In | : | Vol. 1, Issue 8 — August 2014 |
| Page No. | : | 17-25 |
| Domain | : | Engineering |
| Type | : | Research Paper |
| ISSN (Online) | : | 2348-4470 |
| ISSN (Print) | : | 2348-6406 |
A detailed study of the performance of MIMO-OFDM transmission on Wi-MAX physical layer specified inIEEE 802.16-2004 has been carried out using MATLAB Simulink. In order to combat the temporal variations in qualityon a multipath fading channel adaptive modulation and coding techniques are used. This technique employs multiplemodulation and coding schemes to instantaneously adapt to variations in the channel SNR, thus maximizing the systemthroughput and improving BER performance. The Wi-MAX system incorporates Reed-Solomon (RS) encoder withConvolution encoder with 1/2 and 2⁄3 rated codes in FEC channel coding. Orthogonal Frequency Division Multiple(OFDM) accesses use adaptive modulation technique such as BPSK, QPSK and 16-QAM, on the physical layer of WiMAX and the concept of cyclic prefix that adds additional bits at the transmitter end. The simulation results of estimatedBit Error Rate (BER) show that the implementation of interleaved RS code (255, 239, 8) with 2/3 rated Convolution codeunder BPSK modulation technique is found to be highly effective for Wi-MAX communication system. TheImplementation of MIMO systems on Wi-MAX networks show that there is an significant improvement in SNR ~3 dB atBER~10-3for BPSK modulation exhibiting a lowest value for SNR ~9 dB.
R Bhagya, Dr. A G Ananth, “MIMO PERFORMANCE ON Wi-MAX NETWORKS FOR DIFFERENT MODULATION SCHMES”, International Journal of Advance Engineering and Research Development (IJAERD), Vol. 1, Issue 8, pp. 17-25, August 2014.
