Numerical results and conclusions: Although the previous analysis also applies to frequency selective channels, for simplicity we consider the example of a flat fading channel with the channel impulse response z(r, I ) = [c0 + a,z , ( f ) ]S(r ) , where x: is the power gain of the diffise beam and z,(l) is a zero-mean, unit variance complex Gaussian random process representing the time-varying ...

Frequency-domain equalization used in MC-CDMA can be applied to the reception of DS-CDMA signals. Further performance improvement can be attained by the additional use of multiple transmit/receive antenna diversity. The BER performance improvement attainable by the joint use of frequency-domain equalization and multiple transmit/receive antenna diversity in a frequency-selective fading channel ...

The development of broadband wireless communication systems must cope with various performance-limiting challenges that include channel fading as well as size and power limitations at the mobile units. As a promising method dealing with these challenges, space-time coding is effective in supporting reliable, high-data-rate transmissions: the major goal in broadband wireless communications. A su...

We consider the problem of distributed channel allocation in large networks under the frequency-selective interference channel. Our goal is to design a utility function for a non-cooperative game such that all of its pure Nash equilibria have close to optimal global performance. Performance is measured by the weighted sum of achievable rates. Such a game formulation is very attractive as a basi...

The main impairment in wireless channels is the fading or random fluctuation of the signal level. This signal fluctuation happens across time, frequency, and space. Diversity techniques provide the receiver with multiple independent looks at the signal to improve reception. Each one of those independent looks is considered a diversity branch. The probability that all diversity branches will fad...

As the channel frequency selectivity becomes severer, the bit error rate (BER) performance of direct sequence spread spectrum (DSSS) signal transmission with rake combining degrades due to an increasing inter-path interference (IPI). Frequency-domain equalization (FDE) can replace rake combining with much improved BER performance in a severe frequency-selective fading channel. For FDE, accurate...

Abstract An adaptive prediction iterative channel estimation is proposed for the MC−CDMA signal reception in a frequency selective fading channel. Adaptive prediction filtering is incorporated into iterative channel estimation process and the filter tap coefficients are adaptively updated according to changes in the propagation environment. For channel estimation, the pilot MC-CDMA symbol is pe...

We consider blind equalization for block transmissions over the frequency selective Rayleigh fading channel. In the absence of pilot symbols, the receiver must be able to perform joint equalization and blind channel identification. Relying on a mixed discretecontinuous state-space representation of the communication system, we introduce a blind Bayesian equalization algorithm based on a Gaussia...

Orthogonal Frequency Division Multiplexing (OFDM) has recently been applied in wireless communication systems due to its high data rate transmission capability with high bandwidth efficiency and its robustness to multi-path delay. Fading is the one of the major aspect which is considered in the receiver. To cancel the effect of fading, channel estimation and equalization procedure must be done ...