In [1], [3], the authors proposed two Fractionally Spaced (FS) Decision Feedback Equalising (DFE) receivers performing Single User Detection (SUD) or Joint Detection (JD) used in Non Cyclic Prefixed (NCP) Multi CarrierCDMA (MC-CDMA) schemes. The objective of this paper is to compare the performance of the above two equalising schemes, against a simpler receiver structure consisting by a single-...

A novel multi-code multicarrier code division multiple access (MC-MC-CDMA) system is proposed and analyzed in a frequency selective fading channel. By allowing each user to tl'ansmit multiple orthogonal codes, the proposed MC-MCCDMA system can support various data rates, as required by next generation standards, and achieve spreading gain in the time domain. Multicarrier CDMA provides robustnes...

In this paper a simple multiuser Multicarrier system is proposed for multiuser communication, user separation and detection using Interleave Division Multiple Access (IDMA). The performance of IDMA is analyzed in Gaussian and Qausi Static channels. In multicarrier Interleave Division Multiple Access (MC-IDMA) users are separated and identified by interleaving instead of codes as in Code Divisio...

MIMO communication using multiple transmit and multiple receive antennas is a prominent solution to reduce the effect of fading. Additionally spatial multiplexing has been adopted in MIMO to increase the data rate without increasing the transmit power. Due to easier implementation of higher data rate by increased subcarriers and its inherent fading resistance using frequency diversity, MC-CDMA ...

Multi-Carrier Code Division Multiple Access (MCCDMA) is a modulation scheme that combines the advantages of OFDM and CDMA to provide robustness against frequency selectivity in wireless channels. Arrayed MC-CDMA systems combine MC-CDMA and antenna array technology to harness the spatial and temporal ’signatures’ of received signals, thus making it possible to realize high transmission rates env...

In this paper we consider the detection of Multi-Carrier-Code Division Multiple Access (MCCDMA) signals in frequency selective fading channels using partial channel equalization. By partially compensating for the fading channel amplitude we can reduce the multi-user interference without considerably enhancing the additive noise level. As a result the MC-CDMA scheme can exploit the frequency div...

In this contribution, we investigate a variant of the traditional MC-CDMA system in the case of downlink communication. In the proposed MC-CDMA system, we can independently select the number of chips per symbol (Nchip), the number of carriers (Ncarr) and the FFT length (NFFT), so the available resources can be used more effectively. The bandwidth of this flexible MCCDMA system is proportional t...

Multicarrier code division multiple access (MC-CDMA) is a promising technique that combines orthogonal frequency division multiplexing (OFDM) with CDMA. In this paper, based on an alternative expression for the Q-function, characteristic function and Gaussian approximation, we present a new practical technique for determining the bit error rate (BER) of multiuser MCCDMA systems in frequency-sel...

An efficient channel allocation algorithm is proposed for the Partial Block MCCDMA system. Partial channel state information is used for determining the signal-to-noise ratio of all frequency-block-bands. The prior is done to maximize the frequency-block-band allocated to each block user. The proposed system improves the fairness among users and allocates frequency-block-bands with better chann...

Performance and flexibility of mobile radio systems essentially depend on the choice of the multiple access scheme. The novel MC-CDMA scheme which is the topic of this thesis is a promising alternative to conventional FDMA, TDMA, and CDMA schemes. With MC-CDMA, each data modulated chip of the user specific spreading code is mapped onto a separate subcarrier, so that the chips of the spreading c...