Kalender

Seminar title: Introduction to perceptual audio coding

Speaker: Fredrik Brännström, Chalmers University of Technology (formerly Principal Design Engineer, Quantenna Communications, Inc., Fremont, CA, http://www.quantenna.com)

Title: WiFi 802.11a/g/n/ac

Abstract: This seminar starts with a short story on how the speaker became the first employee (after the founders) of Quantenna Communications and how it is to work at a startup company in Silicon Valley. The technical part of the seminar includes an overview of the blocks in the PHY layer of WiFi 802.11a/g (54 Mbps) followed by a discussion on how the rate could be increased to 600 Mbps in 802.11n and to almost 7 Gbps in the latest 802.11ac standard. 

Title to be decided.

Speaker: Christian Schuldt, Limes Audio

Abstract:

In hands-free speech communication front-ends such as, e.g., conference phones, the microphone generally picks a desired speech signal that has been degraded by reverberation caused by the room, together with disturbing background noise and significant echo from the loudspeaker. Hence, there are three major problems that needs to be tackled: reverberation, noise and echo. This presentation will address ways of dealing with these problems, and the focus will be on practical signal processing aspects.

Title: Non-Orthogonal Multiple-Access for 5G Systems

Abstract:
In current LTE systems, multiple-access is generally performed by allocating orthogonal sets of time-frequency resources to different users. This way, inter-user interference is reduced and the task of separating users' signals at the receiver is made easier. However, it is well-known that orthogonal transmission schemes do not achieve the capacity of multiuser channels. In downlink transmission, multiple access schemes performing simultaneous transmission to multiple users, like those based on the principle of superposition coding, can be employed in order to achieve increased data rates. In this talk, we present and discuss some potential non-orthogonal schemes for 5G systems.

Rescheduled for the 11th of April.

Title:
Signal processing for underwater applications

Abstract:
The Swedish Defence Research Agency, FOI, is the leading research institute in Sweden for underwater applications. We deal, for example, with acoustic and electromagnetic wave propagation, sensor technology and signal processing, underwater communications, submarine design, measurement techniques and sea trials, and underwater noise and its effects on marine life. In this talk, we will focus on signal processing of acoustic signals, discussing some problems when applied to signals in Swedish littoral waters. We will give some examples of current work as well as previous work, such as diver detection, how to use passive sparse arrays for range estimation, and how to track vessels using deployable sensor nodes.

The seminar is cancelled due to illness. The talk has been rescheduled for the 2nd of May.

Title to be determined

The upcoming fifth-generation (5G) wireless systems are planned to be significantly faster, more cost- and energy-efficient, support more devices and data volumes than the current 4G mobile networks. A communication system will therefore be subject to challenging requirements before getting a "5G" label, and the multiple-input multiple-output (MIMO) technology is seen as one of the key instruments for fulfilling such requirements. In this talk, I will review the practically relevant MIMO techniques that are considered for current and future mobile networks.

Title: Wireless communication using your eyes.

Title: Signal Processing in WebRTC

Title: IR cameras and Optical Gas Imaging

Title to be decided

Speaker: Lars Kildehoj Rasmussen, KTH (co-founder of Cohda Wireless Pty Ltd, http://cohdawireless.com)

Title: Safety critical communications in cooperative intelligent transportation systems

Abstract: This talk is in two parts; a technical part on safety critical communications in cooperative intelligent transportation systems; and a case story on how the start-up company Cohda Wireless was established, has developed, and what may be ahead.