2 December 1992 Acousto-optic channel equalization for digital communications
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Digital communication systems use complex modulation schemes that require powerful signal- processing techniques to correct chemical distortions and to minimize bit error rates. In this paper, acousto-optic processors are used, in conjunction with adaptive digital equalizers, to reduce the bit error rate of a microwave digital radio receiver. The acousto-optic processor implements an inverse channel filter that is rapidly adaptable to time varying distortions. A specific architecture is identified and a laboratory system is tested to very the ability of the processor to track and correct time-varying channels. Computer simulations are used to show that the hybrid acousto-optic and digital equalizer allows a four-fold increase in the modulation capacity of radio, relative to all digital equalization, while improving the bit error rate performance.
© (1992) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Christopher Scott Anderson, Christopher Scott Anderson, "Acousto-optic channel equalization for digital communications", Proc. SPIE 1703, Optical Technology for Microwave Applications VI and Optoelectronic Signal Processing for Phased-Array Antennas III, (2 December 1992); doi: 10.1117/12.138414; https://doi.org/10.1117/12.138414

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