Design of Continuous and Quantized Amplitude Holograms by Generalized Projections

this paper we address the following problem: What distribution of amplitude a(x) is needed in the transmittance function of a pure-amplitude hologram or spatial light modulator to generate a far-field light intensity I(u)? Here, x is the displacement vector in the plane of the hologram, and u is the displacement vector in the Fourier, or image plane. We examine both continuous and quantized amplitude holograms. With the increasing interest in diffractive optics

On the performance of a hybrid frequency and phase shift keying modulation technique

Abstract-In this paper, we present the performance of a hybrid modulation technique derived from binary frequency shift keying. In the hybrid scheme, each frequency is allowed to be phase modulated with any of p discrete, equally spaced phase shifts. The spectral separation between frequencies, A f , is chosen to make the carriers orthogonal, thus generating a multidimensional modulation scheme. The performance of complete and expurgated phase codes is examined for the Gaussian and Rayleigh fading channels, and their spectral characteristics are determined