Efficient architecture for a multichannel array subbanding system with adaptive processing

Daniel V. Rabinkin; Huy T. Nguyen

doi:10.1117/12.406513

13 November 2000 Efficient architecture for a multichannel array subbanding system with adaptive processing

Daniel V. Rabinkin, Huy T. Nguyen

Proceedings Volume 4116, Advanced Signal Processing Algorithms, Architectures, and Implementations X; (2000) https://doi.org/10.1117/12.406513
Event: International Symposium on Optical Science and Technology, 2000, San Diego, CA, United States

Abstract

An architecture is presented for front-end processing in a wideband array system which samples real signals. Such a system may be encountered in cellular telephony, radar, or low SNR digital communications receivers. The subbanding of data enables system data rate reduction, and creates a narrowband condition for adaptive processing within the subbands. The front-end performs passband filtering, equalization, subband decomposition and adaptive beamforming. The subbanding operation is efficiently implemented using a prototype lowpass finite impulse response (FIR) filter, decomposed into polyphase form, combined with a Fast Fourier Transform (FFT) block and a bank of modulating postmultipliers. If the system acquires real inputs, a single FFT may be used to operate on two channels, but a channel separation network is then required for recovery of individual channel data. A sequence of steps is described based on data transformation techniques that enables a maximally efficient implementation of the processing stages and eliminates the need for channel separation. Operation count is reduced, and several layers of processing are eliminated.

Citation Download Citation

Daniel V. Rabinkin and Huy T. Nguyen "Efficient architecture for a multichannel array subbanding system with adaptive processing", Proc. SPIE 4116, Advanced Signal Processing Algorithms, Architectures, and Implementations X, (13 November 2000); https://doi.org/10.1117/12.406513

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