Constellation Constrained (CC) capacity regions of two-user SISO Gaussian Multiple Access Channels (GMAC) are computed in this paper for several Non-Orthogonal and Orthogonal Multiple Access schemes (abbreviated as NO-MA and O-MA schemes respectively). For NO-MA schemes, a metric is proposed to compute the angle(s) of rotation between the input alphabets such that the CC capacity regions are ma...

With the prevailing CDMA, high information rates are often achieved by reducing spreading factor or adopting multi-code CDMA, however the previous leads to reduced spreading gain against fading and interference, and latter has to overcome the interference among spreading sequences. In contrast, high rate transmission can be achieved in IDMA systems by assigning the FEC codes with high coding ra...

In the first part of paper, a CAOS line camera is introduced for spectral imaging one dimensional (1-D) or targets. The proposed uses both diffraction grating as well cylindrical lens optics system to provide along pixels direction image axis and Fourier transforming operations in orthogonal optical spectrum analysis. imager incorporates Digital Micro-mirror Device (DMD)-based Coded Access Opti...