Capacity and Optimum Signal Constellations for VLC Systems

Capacity Approaching Signal Constellations for Channels with Memory

Floating Signal Constellations for Multimedia

Floating Signal Constellations for Multimedia Steganography Mahalingam Ramkumar, Ali N. Akansu and Xiaodong Cai Department of Ele tri al and Computer Engineering New Jersey Center for Multimedia Resear h New Jersey Institute of Te hnology University Heights, Newark, NJ 07102. ali megahertz.njit.edu Abstra t| Conventional spread spe trum ommuni ation methods essentially map a dis rete symbol fro...

Capacity of BICM Using (Bi-)Orthogonal Signal Constellations in Impulse-Radio Ultra-Wideband Systems

Bit-interleaved coded modulation (BICM) using (bi-)orthogonal signals is especially well suited for the application in impulse-radio ultra-wideband transmission systems, which typically operate in the power-limited regime and require a very low-complexity transmitter and receiver design. In this paper, we analyze the capacity of BICM using (bi-)orthogonal signals with coherent and noncoherent d...

Collaborative VLC/IROW Systems

Dimming is an important feature of an indoor lighting system where the illumination level can be controlled by the user. Therefore, integrating a visible light communication (VLC) system with an illumination system poses some challenges. One of the main issues is that the light unit should be “ON” all the time to ensure continuous communication. To ensure acceptance and adoption of VLC systems,...

Signal Constellations for Noncoherent Space-Time Communications

We examine the problem of designing signal constellations for the multiple transmitmultiple receive antenna Rayleigh fading communication channel. By employing the asymptotic union bound on the probability of error, we find a new formulation of the problem of signal design for the noncoherent fading channel. Since unitary signals are optimal (in the limit of large signal to noise ratios), the d...