Digital Signal Processing Laboratory

Located in room 147, the Digital Signal Processing (DSP) lab is under the management of Lichuan Liu, Ph.D. Here, the research emphasis is on real-time DSP applications. The projects being conducted in the lab are primarily based on active noise control (ANC) and active vibration control (AVC) systems. The lab is comprised of a diverse range of signal processing equipment, including a number of TMS320C5510 and TMS320C32x kits, spectrum analyzers, microphones, amplifiers, analog filters, and power amplifiers.

Active Noise Control (ANC)

ANC systems are used to cancel undesired noise. These systems work on the principle of superposition, i.e., an anti-noise signal of the same magnitude but the opposite phase is generated to cancel any unwanted primary noise. Typically, the primary noise is picked up by a microphone, is sent to a DSP, which then generates an anti-noise to cancel the original noise. ANC systems support a wide variety of applications. Some of the applications pursued in this laboratory are given below:

Snore ANC System
Global ANC System
Incubator ANC System
Active Masking for Tinnitus
ANC for the Electronic Muffler
Noise Masking using Psychoacoustics

Active Vibration Control (AVC)

Active vibration control works on the same principle as ANC, but to cancel vibration in structures. AVC systems use shakers and accelerometers in place of speakers and microphones in ANC systems. The following project, an application of AVC is currently being developed in the DSP lab.