Computationally efficient bandwidth allocation and power control for OFDMA
IEEE Transactions on Wireless Communications
Multiuser adaptive subcarrier-and-bit allocation with adaptive cell selection for OFDM systems
IEEE Transactions on Wireless Communications
IEEE Communications Magazine
Channel estimation for OFDM systems with transmitter diversity in mobile wireless channels
IEEE Journal on Selected Areas in Communications
Multiuser OFDM with adaptive subcarrier, bit, and power allocation
IEEE Journal on Selected Areas in Communications
Hi-index | 0.00 |
Orthogonal frequency division multiple access (OFDMA) has been used for broadband wireless multiple access. The performance of OFDMA system can be improved by using multiple antennas with space time coding to get transmit and receive diversity. Channel information estimated at receiver for space time decoding can be used for sub-channels allocation at transmitter. In this paper, we propose a method to allocate the subcarriers of mobile user at base station based on subchannels gain. Data of each user is modulated on a set of sub-carriers in order to get maximum sub-channel gain. The simulation results show that system with proposed sub-channel allocation is always better than system without allocation. Compare to SISO system, BER performance of sub-channel allocated system can improve 7.9dB SNR and 13.7dB SNR with MISO and MIMO, respectively.