Multirate Filtering For Digital Signal Processing and Its Applications

Multirate Filtering techniques are used when conventional method becomes extremely costly and this technique is widely used in both sampling rate conversion system and in constructing filters with equal input and output rates. The basic concepts and building blocks in multirate digital signal processing are discussed here which includes down-sampler, up-sampler and analysis/synthesis representation. Applications of multirate digital filters in DS/CDMA code acquisition, Kalman filtering for optimal signal reconstruction from noisy subband system and lossy compression approach to transmultiplexed images are also reviewed