In this paper, we propose an automatic modulation classification scheme for digitally modulated signals, such as MSK, GMSK, BPSK, QPSK, 8-PSK, 16-QAM, 32-QAM, and 64-QAM. As features which characterize the modulation type, higher order cyclic cumulants up to eighth order of the signal are used. For feature classification, a Gaussian mixture model based algorithm is used. Simulation results are ...

The FPGA technology has been playing a considerable role in Rportable and mobile communication. This is due to the features of flexibility, accuracy and configurability in designing and Implementation. The project presents a complete design for QAM Transmitter and Receiver based on the Spartan 3e FPGA kit. The implemented system can be used in typical wimax system and any other communication sy...

Intelligent reflecting surface (IRS) is a promising technology to deploy reconfigurable and cost-effective next-generation wireless communication systems. In this work, we investigate the performance of an IRS-aided two-way network over Rayleigh fading channels, where downlink uplink transmission between base station user equipment established in full-duplex mode. We take into account impact re...

In this work, a full-duplex time and wavelength division multiplexing-passive optical network (TWDM-PON) system is analysed. Orthogonal frequency multiplexing (OFDM) with m-quadrature amplitude modulation (m-QAM) employed to improve the performance of TWDM-PON for downstream upstream transmission. Simultaneously, multi-color (390–750 nm) laser diodes (LDs) are visible light communication (VLC) ...

In this paper, we identified the challenges and requirements for the waveform design of the fifth generation mobile communication networks (5G) and compared Orthogonal frequency-division multiplexing (OFDM) based waveforms with Filter Bank Multicarrier (FBMC) based ones. Recently it has been shown that Quadrature-Amplitude Modulation (QAM) transmission and reception can be enabled in FBMC by us...

In this paper multi-carrier transmission schemes applying general waveforms are discussed within two-phase two way relay channels. Here, two users communicate simultaneously on the same resources to an assisting relay. The relay has to cope with the superposition of both users, interferences of the channel and additional practical impairments like frequency and timing offsets. To be more robust...

Recently, multiple-input–multiple-output (MIMO) relay networks have been an active area of research, particularly with combining single transmit antenna selection (TAS) and receiver maximal ratio combining (MRC). Moreover, generalorder rectangular quadrature amplitude modulation (QAM) has received much attention for its high spectral efficiency and flexible modulation scheme. However, the analy...

We determine the bit-error rate (BER) of multilevel quadrature amplitude modulation (M-QAM) in flat Rayleigh fading with imperfect channel estimates. Despite its high spectral efficiency, M-QAM is not commonly used over fading channels because of the channel amplitude and phase variation. Since the decision regions of the demodulator depend on the channel fading, estimation error of the channel...

Signal space diversity (SSD) is a promising technique for obtaining diversity without increases in bandwidth, transmit power or physical hardware at the expense of increased ML detection complexity. Symbol error rate (SER) analysis of a two-dimensional system containing a single transmit antenna and N receive antennas with maximal-ratio combining (MRC) reception is presented here along with a s...