In this contribution, we give an overview of the sensitivity of a number of multicarrier systems to carrier and symbol synchronization errors. A comparison is made between orthogonal frequency-division multiplexing/multiple access (OFDM(A)) and two combinations of the orthogonal multicarrier (MC) transmission technique with the code-division multiple access technique (CDMA), i.e. multicarrier C...

In this paper, we investigate the influence of different Walsh-Hadamard (WH) code allocation techniques on the performance of multi-carrier code division multiple access (CDMA) systems in the presence of high power amplifier (HPA) non-linearities. We consider two different multi-carrier CDMA schemes: multi-carrier CDMA (MCCDMA) and multi-carrier direct sequence CDMA (MC-DSCDMA) and analyse thei...

In this work we consider the uplink scenario of a single cell multi carrier code division multiple access (MCCDMA) in which the channel between a given user and the base station receiver is assumed known and stable for the duration of the transmission. We propose an algorithm that uses the greedy interference avoidance method as well as power update to adapt the transmitter waveform of users. T...

A carrier offset correction scheme based on Maximum Likelihood (ML) method for the downlink of an Orthogonal Variable bit rate Multicarrier-CDMA (MCCDMA) scheme in a fast frequency selective Rayleigh fading channel is proposed and discussed. The proposed methodology assumes perfect knowledge of phase offset, whereas an Equal Gain Combining (EGC) scheme is considered for MC-CDMA detection. Resul...

In this paper, we propose an MCCDMA model using Rake Receiver and different equalization techniques (ZF, MMSE, EGC and MRC) are used. Rake receiver using different number of fingers has been considered for performance evaluation. Simulation has been carried out using MATLAB 2010a. Additionally, we examine its BER v/s SNR graph for different types of equalizers in Rayleigh fading channel. Simula...

In this paper multi-user detection techniques, such as Parallel and Serial Interference Cancellations (PIC & SIC), General Minimum Mean Square Error (GMMSE) and polynomial MMSE, for the downlink of a broadband Multi-Carrier Code Division Multiple Access (MCCDMA) system are investigated. The Bit Error Rate (BER) and Frame Error Rate (FER) results are evaluated, and compared with single-user dete...

The effect of carrier frequency on the performance of an MCCDMA (Multi-Carrier Code Division Multiple Access) system is considered. Bit error probability of the downlink of this system is analyzed taking into the effect of frequency offset. This paper will be focused on the derivation of the bit error probability mathematically. Derived results show that the performance of MC-CDMA is very sensi...

In this paper, we propose two receiving schemes for multiple antenna multi-carrier code division multiple access (MCCDMA) systems. Our proposed schemes are based on vertical Bell labs layered space-time (V-BLAST) architecture. The interference cancellation is performed serially on different sub-carriers. The channel matrices related to different sub-carriers are used in the successive interfere...

-To achieve high data rate Multi-Carrier Code Division Multiple Access (MC-CDMA) is a suitable choice for next generation wireless communication system. MCCDMA is the combination of CDMA and OFDM schemes along with receiver diversity including cyclic prefix and zero padding, resulting into getting the advantages of all of these schemes. Capacity improvement is one of the major issues in designi...

The improved BER was achieved by inhibiting 1/3 rated Turbo coder instead of 1/2 rated Turbo coder. It was accomplished by sending the output from 1/3 rated Turbo encoder to serial to parallel converter. The output from serial to parallel converter was inhibited to various Adaptive modulation schemes like m-aryPSK, m-aryQAM, m-aryCPM, and m-aryMHPM system. The modulated output was then fed to m...