Abstract: An apparatus for low complexity sub-Nyquist sampling of sparse wideband signals is provided, including a mixer, a periodic random sequence generator and a filter bank. The periodic random sequence generator generates a periodic pseudo-random sequence. The mixer is connected to the periodic random sequence generator for receiving the periodic pseudo-random sequence and mixing with an input signal to obtain a modulated signal. The filter bank further includes a plurality of filters and is connected to the mixer for filtering the modulated signal. The sub-Nyquist sampling apparatus may further includes a plurality of analog-to-digital convertors (ADCs), with each ADC connected to each filter of the filter bank to sample the signal from the filter bank and output a sampling signal.

Abstract: A neural probe for stimulating neural tissue is disclosed. The probe comprises a three-dimensional arrangement of individually addressable electrodes. As a result, embodiments of the present invention can steer stimulative electric current through a wide range of paths through neighboring neural tissue. This enables specific targeting of neural selected neural tissue. In addition, embodiments of the present invention provide increased tolerance to probe misplacement or movement after insertion. Further, embodiments of the present invention enable changes in the neural tissue being stimulated without requiring additional surgical procedures.