Enhancing spectral efficiency of Transform Domain Communication Systems by using a multidimensional modulation

Transform Domain Communication System (TDCS) is a Cognitive Radio technology that has been thoroughly studied by the Air Force Institute of Technology because of its resiliency against jammers or interferences while being noise-like. However TDCS' huge disadvantage is its low spectral efficiency. In this article, we propose the use of a dense multidimensional modulation to counteract this property. We develop the theoretical Bit Error Rate (BER) performance and show that the theory matches well the simulation. We point out that this modulation can compete with QPSK systems in terms of spectral efficiency while keeping TDCS' intrinsic assets.

[1]  M. Reuter,et al.  Cyclic code shift keying: a low probability of intercept communication technique , 2003 .

[2]  Michael A. Temple,et al.  Interference avoidance communications using wavelet domain transformation techniques , 2001 .

[3]  Shaoqian Li,et al.  Transform Domain Communication System Based on Random-Ambiguity and Fractional Fourier Transform , 2006, 2006 6th International Conference on ITS Telecommunications.

[4]  Jun Wang,et al.  Addressing the control channel design problem: OFDM-based transform domain communication system in cognitive radio , 2008, Comput. Networks.

[5]  Yu T. Su,et al.  Performance Analysis of Transform Domain Communication Systems in the Presence of Spectral Mismatches , 2007, MILCOM 2007 - IEEE Military Communications Conference.

[6]  Pascal Chargé,et al.  Transform domain communication systems from a multidimensional perspective, impacts on bit error rate and spectrum efficiency , 2011, IET Commun..

[7]  L.P. Ligthart,et al.  On the utilization of embedded symbol for CCSK BER improvement in TDCS dynamic spectrum access , 2008, 2008 European Conference on Wireless Technology.

[8]  Robert F. Mills,et al.  Interference avoidance in spectrally encoded multiple access communications using MPSK modulation , 2005, IEEE Wireless Communications and Networking Conference, 2005.

[9]  P. J. Swackhammer,et al.  Performance simulation of a transform domain communication system for multiple access applications , 1999, MILCOM 1999. IEEE Military Communications. Conference Proceedings (Cat. No.99CH36341).