A large demand of frequency allocation has fuelled the Multi-carrier system, resulting in a crowded spectrum as well as simultaneous access being required by a large number of users. Existing wireless systems may utilize single frequency, single antenna and pulse for carrier transmission and reception. Problems of such system is that in case of failure the total system will become non operation...

The use of a cyclic prefix (CP) to mitigate inter-symbol interference is a technique commonly applied in both single and multi-carrier systems. Recently it has been suggested that the CP be replaced by a pre-defined sequence of known symbols. This technique, referred to as ‘Known Symbol Padding’ (KSP) inserts a short training sequence (TS) at the beginning of each transmission block for equaliz...

| Multi-carrier (MC) modulation has been recently proposed for code-division multiple access (CDMA) mobile radio communications, by modulating an identical symbol on multiple carriers of same magnitude. Certain phase o sets assigned to each carrier de ne a code that is given to a speci c user. We introduce a CDMA system based on multi-carrier spread spectrum (MC-SS) with one identical code for ...

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...

This paper continues discussing the design and development of an advanced integrated wireless system discussed in papers [1, 2, 3] that can be used by emergency responders and health care providers to communicate useful and critical information whenever and wherever they need. The design of a Multi Carrier signal structure and signal processing algorithm that applies a matrix-decomposition-base...

Abstract | In this paper, a multi-carrier spreadspectrum (MC-SS) code division multiple access (CDMA) system with RAKE receiver is investigated in a multi-user environment. The impact of the non-ideal MC-SS code signal autoand crosscorrelation properties on the system performance is examined. Terms for the probability of bit errors are derived considering these correlation behaviors. Furthermor...

A two-phased approach is proposed to estimate the overall multi-hop WiMax system performance. The proposed methodology is generic and can embrace various multi transmit multi receive techniques along with different possible (H)ARQ mechanisms. Advanced modulation and coding sub-carrier mapping is assumed for static and low mobility links to allow operation of adaptive techniques such as dynamic ...