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Analog beamforming has been considered an attractive technology for future single carrier millimeter-wave multiple-input multiple-output (MIMO) systems because of the high cost and huge power consumption of mixed-signal devices. Most conventional studies have focused on joint base station and user equipment (BS-UE) analog beamforming with the objective of improving the average signal to noise ratio...
Hybrid Digital-Analog (HDA) transmission has been proved to be an effective technique to overcome the “cliff effect” in wireless video communication. In this paper, we propose a novel HDA modulation scheme. The phase of modulation symbol is used to carry the digital signal while the amplitude of modulation symbol is used to carry analog signal. In order to make full use of channel capacity, the bit...
In this paper we compare the implicit and explicit methods of providing channel state information (CSI) to the transmitter in a multi-user multiple-input-multiple-output (MU-MIMO) system as specified in the draft specification IEEE 802.11ac [1]. The comparison is made on the basis of both overhead requirements and packet-error-rate (PER) performance. We also propose a hybrid feedback scheme that combines...
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