Abstract
A one-input M-output (1 × M) circuit configuration and design algorithm for an interleave filter with M output ports (M ≥ 2) are presented. The circuit configuration is composed of a 1 × M optical lattice filter with a delay time of M Δτ (Δτ: unit delay time), an M × M diagonal delay matrix circuit, and an M × M modified inverse discrete Fourier transform matrix
circuit. The proposed circuit with M = 2 corresponds to a conventional interleave filter. The proposed synthesis algorithm is based on polyphase decomposition and yields circuit parameters ensuring that every output characteristic has an M th-band property. A five-channel interleave filter is presented as an example of the design procedure.
© 2007 IEEE
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