Presentation 1: Noise canceling in 1-D data

Seri Rahayu Abd RaufFatima BoujarwahJuan ChenLiyana Mohd SharippArti Thumar

M2

Overview

• Part of a research done in CMU – Micron: Intelligent Microsurgical

Instruments project led by Prof Pradeep Khosla

• This design uses adaptive weighted-frequency algorithm for noise canceling purposes.

Project Background: Noise Canceling Chip

1. An essential block in a research project done here at CMU: Micron: Intelligent Microsurgical Instrument

2. Main objective of the research :

• To provide a technique to compensate the amount of errors due to “physiological hand tremor, jerk, low-frequency wander and also pathological movement disorder.”

• To enhance the accuracy of human-machine interfaces.

• To improve the living of patients with movement disorders.

• To increase performance in microsurgery applications.

Source: http://www-2.cs.cmu.edu/~camr/research.html

Applications Microsurgery Instrument

Rehabilitation

Image sources: http://irb.cs.tu-berlin.de/~zuse/history/ibm158c.jpg http://www.richard-wolf.com/english/e_image/ww_hp4.jpg

Applications

Vehicle / Aircraft Maneuvering

Hearing Aid

Image sources: http://www.ahaanet.com/hearingaidstyles.asp http://hometown.aol.com/jaywhle/extreme/control.gif

How does the chip work?

• It uses adaptive weighted frequency algorithm in 1-D data.

Input: Human motion signal with noise introduced by pathological and physiological tremor.

Output: Noise suppressed signal for higher precision.

Block Diagram

Source: Modeling and Canceling Tremor in Human-Machine Interfaces

Result

Source: Modeling and Canceling Tremor in Human-Machine Interfaces

Transistor Estimate

Part Transistors

8-bit Adders 12x8x24 = 2304

8-bit Multipliers 10x1200 = 12000

ROM 800

Registers 10x8x14 = 1160

Misc 3000

Total ≈ 19210

Status

• Design Proposal √• Architecture (in progress)• To be done:

• Floor Plan• Gate Level Design• Component Layout• Chip Layout• Spice Simulation of Entire

Chip

Problems…

• Several inputs are too small for bit shifting

(10^-7…)

• Value of M could be made greater for higher precision (More complex)

• Transistor count seems too simple…really, it is NOT

Goal

• Higher throughput

Alternatives

• Serpent encryption

• Branch predictor

Summary

• Why do we choose this?

Questions?