Design of Fractional Delay Filters Using Convex Optimization
نویسنده
چکیده
Fractional sample delay (FD) filters are useful and necessary in many applications, such as the accurate steering of acoustic arrays [1], [2], delay lines for physical models of musical instruments [3] [4], and time delay estimation[5]. This paper addresses the design of finite impulse response (FIR) FD filters. The problem will be posed as a convex optimization problem in which the maximum modulus of the complex error will be minized. Several design examples will be presented, along with an empirical formula for the filter order required to meet a given worst case group delay error specification.
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