Exploiting the channel division multiple access for MBOFDM over 802.15.3a model

For Wireless Personal Area Network systems, the cooperation between different users and the coexistence of different piconets are very interesting points to take into consideration for the optimization of high data rate Ultra Wide Band systems. To improve the performance of the Multi Band OFDM, we investigate a new waveform obtained by the integration of an innovative scheme that exploits the user's channels to guarantee multiple accesses called Channel Division Multiple Access (ChDMA), which employing the channel impulse response of each user as a signature. The analysis is focused on the improvement of the MB-OFDM system in terms of the spectral efficiency. In the proposed model, Nakagami fading distribution has been considered for 802.15.3a channel model which suits for time varying multipath radio environment. The spectral efficiency asymptotic analysis is investigated considering the optimal receiver.

[1]  Iain B. Collings,et al.  Asymptotic spectral efficiency of multiuser multisignature CDMA in frequency-selective channels , 2006, IEEE Transactions on Information Theory.

[2]  Erdal Arikan.  Capacity bounds for an ultra-wideband channel model , 2004, Information Theory Workshop.

[3]  David Tse,et al.  Channel Uncertainty in Ultra-Wideband Communication Systems , 2005, IEEE Transactions on Information Theory.

[4]  Robert M. Gray,et al.  Toeplitz And Circulant Matrices , 1977 .

[5]  A. Goldsmith,et al.  Capacity of Rayleigh fading channels under different adaptive transmission and diversity-combining techniques , 1999, IEEE Transactions on Vehicular Technology.

[6]  Desmond P. Taylor,et al.  A Statistical Model for Indoor Multipath Propagation , 2007 .

[7]  Paul D. Alexander,et al.  Random Sequence Multisets for Synchronous Code-Division Multiple-Access Channels , 1998, IEEE Trans. Inf. Theory.

[8]  Raul Liberato,et al.  Exploiting the wireless channel for communication , 2008 .

[9]  Dana Porrat,et al.  INFORMATION THEORY OF WIDEBAND COMMUNICATIONS , 2007, IEEE Communications Surveys & Tutorials.

[10]  Abolfazl Mehbodniya,et al.  Ultra wideband technologies coexistence in Nakagami-m fading channels , 2009, IET Commun..

[11]  Dag Jonsson.  Some limit theorems for the eigenvalues of a sample covariance matrix , 1982 .

[12]  Matthieu Crussière,et al.  An OFDM-CDMA Scheme for High Data Rate UWB Applications , 2007, 2007 IEEE 65th Vehicular Technology Conference - VTC2007-Spring.

[13]  Shlomo Shamai,et al.  Spectral Efficiency of CDMA with Random Spreading , 1999, IEEE Trans. Inf. Theory.

[14]  A. Goldsmith,et al.  Capacity of Nakagami multipath fading channels , 1997, 1997 IEEE 47th Vehicular Technology Conference. Technology in Motion.

[15]  Antoine Stephan,et al.  Resource Allocation Strategies and Linear Precoded OFDM Optimization for Ultra-Wideband Communications. (Stratégies d'allocation des ressources et optimisation de solutions OFDM avec précodage linéaire pour les communications ultra large bande) , 2008 .

[16]  de Lacerda Neto,et al.  Channel division multiple access , 2007 .

[17]  J. W. Silverstein,et al.  On the empirical distribution of eigenvalues of a class of large dimensional random matrices , 1995 .

[18]  Md. Abdul Matin,et al.  Ultra Wideband Communications: Novel Trends - Antennas and Propagation , 2011 .

[19]  Shlomo Shamai,et al.  The impact of frequency-flat fading on the spectral efficiency of CDMA , 2001, IEEE Trans. Inf. Theory.