Digital Beamforming in Wireless Communications
Digital Beamforming in Wireless Communications
Third-Generation Systems and Intelligent Wireless Networking: Smart Antennas and Adaptive Modulation
Third-Generation Systems and Intelligent Wireless Networking: Smart Antennas and Adaptive Modulation
Adaptive minimum bit error rate beamforming assisted receiver for QPSK wireless communication
Digital Signal Processing
Adaptive minimum bit-error rate beamforming
IEEE Transactions on Wireless Communications
Adaptive Modulation with Diversity Combining Based on Output-Threshold MRC
IEEE Transactions on Wireless Communications
IEEE Transactions on Wireless Communications
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This paper considers adaptive beamforming receiver that support multiple users, each having one transmit antenna. In certain circumstances, symbol error rate (SER) performance of the beamforming receiver degrades severely. In order to minimize the SER, minimum symbol error rate (MSER) beamforming receiver is utilized. Then, we propose an adaptive modulation scheme for the receiver to maintain the average SER below the target SER while maximizing the average throughput. The scheme uses the information on the direction of arrival and the average signal-to-noise ratio to decide the appropriate modulation mode. For comparison, the proposed scheme is also applied to minimum mean square error (MMSE) beamforming receiver system. Simulations were carried out in the presence of single and two interferers. Simulation results show that the performance of the proposed algorithm employing MSER beamforming is superior to its MMSE counterpart, with the largest advantage of 0.21 in the outage probability.