Integrating the strengths of multicarrier (MC) modulation and code division multiple access (CDMA), MC-CDMA systems are of great interest for future broadband transmissions. This paper considers the problem of channel identification and signal combining/detection schemes for MC-CDMA systems equipped with multiple transmit antennas and space-time (ST) coding. In particular, a subspace-based blin...

Models in which the space-time metric g µν is not symmetric, i.e. g µν = g νµ may make predictions in scattering experiments, for example in a future e + e − linear collider, similar to those from noncommutative field theory. We compute the differential cross sections for pair annihilation , Bhabha and Møller scattering and find that both nonsymmetric gravity theory(NGT) and noncommutative fiel...