Fractional weighted ZF equalizer: A novel approach for channel equalization in MIMO-OFDM system under impulse noise environment

Abstract

Impulse noise is the major factor degrading the performance of the wireless system, imposing the need for the impulse noise mitigation strategy. Mainly, in the multiple-input multiple-output (MIMO) and orthogonal frequency-division multiplexing (OFDM) system contaminated with the impulse noise creates a major impact in the performance as the conventional zero-forcing (ZF) equalizer as there is no satisfactory results. Thus, the paper concentrates on the impulse noise mitigation strategy based on the fractional weighed zero-forcing (FWZF) equalizer, which is the integration of the fractional concept in the Zero-Forcing equalizer. The noise impacts in the MIMO-OFDM system are minimized and the performance is enhanced due to the usage of the fractional theory in the ZF equalizer as the equalization values of the previous instances are interpreted for the formulation of the effective equalization value in the current instance of the ZF equalizer. The performance of the methods is done based on the valuation metrics, Bit Error Rate (BER), Mean Square Error (MSE), and Symbol Error Rate (SER) with respect to the Signal-to-Noise Ratio (SNR) and dissimilar antenna array size. It is found that the proposed Fractional Weighed Zero-Forcing equalizer outperformed the existing methods with a minimal BER and SER of 0.063, and 0.1038 while analyzing the methods in the Rayleigh environment.

Development of Communication System between TPMS and Server using Combination of OFDM and Convolutional Code Technique Based on SDR

“…The LabVIEW interface is illustrated in for Metropolitan Area Network (MAN) protocols [20]. OFDM represents an efficient multicarrier bandwidth scheme for digital communication in which the subcarriers overlap, leading to enhanced spectrum efficiency [21].…”

“…OFDM has found its application in various wireless standards, including Digital Audio Broadcasting (DAB), Digital Video Broadcasting (DVB-T), IEEE 802.11a for Local Area Network (LAN) protocols, and IEEE 802.16afor Metropolitan Area Network (MAN) protocols[20]. OFDM represents an efficient multicarrier bandwidth scheme for digital communication in which the subcarriers overlap, leading to enhanced spectrum efficiency[21].Orthogonal Frequency Division Multiplexing (OFDM) is a wireless technology that employs a method of dividing carriers into multiple orthogonal subcarriers. By transforming a singlecarrier signal according to the Nyquist criterion into a multicarrier criterion, it generates multiple orthogonal subcarrier signals that overlap in the spectrum.…”

Performance Analysis of Combining Beamforming and ZF/MMSE-SIC Equalization Techniques for MIMO DWPT-COFDM Systems

“…Equalization techniques in MIMO and MIMO-OFDM systems, including Zero-Forcing (ZF), Minimum Mean Square Error (MMSE), ZF-Successive Interference Cancellation (ZF-SIC), and MMSE-SIC, have been studied to mitigate ISI and enhance link reliability [24][25][26][27][28][29][30][31]. Spatial signal processing in multiple-antenna wireless devices, like ZF-Beamforming (ZF-BF) and MMSE-Beamforming (MMSE-BF), further enhances system performance [37].…”