Structured Aliasing

A Method for Alias Reduction in Cascaded Filter Banks

This paper shows a new way to reduce aliasing in critically sampled cascaded filter bank structures. Unlike standard tree structured methods, which lead to many aliasing components in the final subbands, our approach reduces the effect by canceling aliasing elements among subbands. Our interest lies in compression applications where we can apply the scheme to obtain an unequal or non-uniform ba...

Reasoning about Aliasing

Object-oriented systems are typically structured as complex networks of interacting mutable objects. To reason about such systems, simple and eecient techniques for coping with aliasing are needed. This paper identiies several key criteria for evaluating techniques for reasoning about aliasing, then proposes a technique which satisses these criteria. The proposed technique is a simple extension...

The Importance of Aliasing in Structured Quantization Index Modulation Data Hiding

Notions of Aliasing and Ownership

We survey notions of aliasing and ownership. An extreme but conceptually useful model is that of pure linear languages where each object is constructed once and read, being consumed, once. We see more realistic programming languages as relaxing this to allow multiple references to an object (spatial aliasing) or multiple sequenced operations on a single live reference (temporal aliasing) before...

Structured estimation of sparse channels in quasi-synchronous DS-CDMA

We explore the channel estimation problem in the case of quasisynchronous users in a DS-CDMA system. Knowledge of the transmit (TX) filter is assumed, and the anti-aliasing low-pass front end receive (RX) filter is designed for critical sampling at the Nyquist rate for the TX filter. It is shown that when the sampling frequency is larger than the Nyquist frequency, the discrete-time representat...