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This paper presents the concept and implementation of collaborative smart antenna network for WLAN applications. In this scenario, the WLAN access points (APs) are randomly distributed in the coverage area and employ phased array antennas to provide dynamic coverage reconfiguration. By analyzing the online location-based information of user devices (UDs), the desired patterns in the coverage area...
This paper proposes a novel LQ-based generalized side-information cancellation (GSIC) precoder for multiuser multi-input multi-output (MU-MIMO) downlink systems with sum-rate performance enhancement. The proposed transceiver comprises the following stages. First, a unitary transform matrix designed through the LQ decomposition of the MU-MIMO channel is proposed for suppressing MU interference and...
A novel generalized side-information cancelling precoder is proposed for the multiuser MIMO downlink systems over MIMO broadcast fading channels. The proposed transceiver involves the following stages. First, the minimum mean square error (MMSE) based channel inversion (MMSE-CI) technique is utilized to suppress multiuser broadcast interference. Next, using the generalized side-information cancellation...
The low complexity time–frequency multiplex estimator and equalizer transceiver design are proposed to combat the RF impairment problems for the zero-IF transceiver of multi-carrier systems. Moreover, the proposed preamble can estimate and compensate the receiver (Rx) in-phase and quadrature-phase (IQ) imbalance, carrier frequency offset (CFO), and channel impulse response parameters. There are two...
A low complexity time-frequency multiplex estimator and low complexity equalizer transceiver design is proposed to combat the RF impairment problems for the zero-IF transceiver of multi- carrier systems. Moreover, the proposed preamble can estimate and compensate the transmitter/receiver (Tx/Rx) in-phase and quadrature-phase (IQ) imbalance, carrier frequency offset (CFO), and channel impulse response...
The demand for high data rate and reliable quality of service has increased in nowadays. Multi-user will induce other cells interference which severely degrades the system performance. In this paper, the interference alignment (IA) techniques in uplink (UL) coordinated multipoint (CoMP) system with three different dynamic information selection (DIS) schemes are proposed to enhance the performance...
Orthogonal Frequency Division Multiplexing (OFDM) is a popular technique in modern wireless communications. There are many systems adopting the OFDM technique, such as IEEE 802.11 a/g/n, IEEE 802.16, Digital Video Broadcasting, etc. Since the subcarriers in an OFDM system are mutually orthogonal in the frequency domain, it is quite sensitive to synchronization errors. In wireless communications, sampling...
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