Space-time delta-sigma modulation for reception of multiple simultaneous independent RF beams

Guoguang Rong; Bruce A. Black; Azad Z. Siahmakoun

doi:10.1117/12.628732

5 October 2005 Space-time delta-sigma modulation for reception of multiple simultaneous independent RF beams

Guoguang Rong, Bruce A. Black, Azad Z. Siahmakoun

Proceedings Volume 5971, Photonic Applications in Nonlinear Optics, Nanophotonics, and Microwave Photonics; 59712G (2005) https://doi.org/10.1117/12.628732
Event: Photonics North, 2005, Toronto, Canada

Abstract

In this paper we introduce and analyze a multiple-RF-beam beamformer in receive mode utilizing the principle of space-time delta-sigma modulation. This principle is based on sampling input signals in both time and space and converting the sampled signals into a digital format by delta-sigma conversion. Noise shaping is achieved in 2D frequency domain. We show that the modulator can receive signals of narrow and wide bandwidths with steering capability, can receive multiple beams, and establish tradeoffs between sampling in time and in space. The ability of the modulator to trade off between time and space provides an effective way to sample high frequency RF signals without down conversion. In addition, a space-time delta-sigma modulator has better performance than a solely temporal delta-sigma modulator (for the same filter order), as is typically used in communication systems to digitize the down-converted analog signals.

Citation Download Citation

Guoguang Rong, Bruce A. Black, and Azad Z. Siahmakoun "Space-time delta-sigma modulation for reception of multiple simultaneous independent RF beams", Proc. SPIE 5971, Photonic Applications in Nonlinear Optics, Nanophotonics, and Microwave Photonics, 59712G (5 October 2005); https://doi.org/10.1117/12.628732

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