Cordic based IIR digital lters possess desirable properties for VLSI implementation such as local connection, regularity, and good nite word-length behavior, but can't be pipelined to ner levels (such as bit or multi-bit levels) due to the presence of feedback loops. In this paper, a pipelining method for the cordic based IIR digital lters is proposed using the constrained lter design methods a...

This paper deals with a new method to design polyphase spreading sequences for DS CDMA wireless applications. The method is based on weighting symbols of the orthogonal Walsh sequences by the complex factors being symbols of baseband chirp sequences. The resulting sequences possess good aperiodic correlation properties, while maintaining the orthogonality. Because of the parametric design, the ...

A dual-mode Bluetooth/ZigBee low-IF polyphase channel filter has been designed with 0.18 μm digital CMOS technology based upon transconductorcapacitor (GmC) structure. The filter has a fifthorder 0.5dB equiripple Chebyshev bandpass response. It achieves a signal-to-noise ratio of 62dB and input referred third-order intermodulation intercept of 33dBVp (for distant blocker interference). The filt...

The polyphase IIR N-path structure based on the N-order allpasses is very attractive for high quality fractional-band filters, as high attenuation and small passband ripples can be achieved for much less coefficients than other filter structures. However its general form suffers from spikes in the stopband independent from the coefficient values. The paper presents alternative ways to those fou...

Multiple wave energy converter (WEC) buoys can be used to establish a WEC array-powered microgrid collectively forming Marine Energy Grid (MEG). An oceanic domain with gravity waves will have significant spatial variability in phase, causing the power produced by array high peak-to-average ratios. Minimizing these fluctuations reduces demand for large storage DC microgrids while also reducing l...