Deutsche Telekom

About: Deutsche Telekom is a company organization based out in Welwyn Garden City, United Kingdom. It is known for research contribution in the topics: Telecommunications network & Signal. The organization has 3473 authors who have published 5208 publications receiving 65429 citations. The organization is also known as: DTAG & German Telecom.

Microphone as Sensor in Mobile Phone Performance.

Abstract: Many mobile devices, specifically mobile phones, come equipped with a microphone. Microphones are high-fidelity sensors that can pick up sounds relating to a range of physical phenomena. Using simple feature extraction methods, parameters can be found that sensibly map to synthesis algorithms to allow expressive and interactive performance. For example blowing noise can be used as a wind instrument excitation source. Also other types of interactions can be detected via microphones, such as striking. Hence the microphone, in addition to allowing literal recording, serves as an additional source of input to the developing field of mobile phone performance.

LTE Advanced — A further evolutionary step for Next Generation Mobile Networks

Abstract: The World Radio Conference in 2007 identified additional spectrum for IMT-2000 and IMT-Advanced systems. That's why also 3GPP has started a feasibility study for LTE-Advanced techniques to continuously evolve LTE technology. LTE-Advanced is expected to enable download peak rates over 1Gbps at 100MHz bandwidth and in the upload peak rates over 0.5Gbps. Novel techniques on radio interface are going to be analyzed especially to improve spectral efficiency and cell edge performance. Advanced Antenna systems, Multi-User and Multi-Cell Multiple-Input Multiple-Output, Coordinated Multi-Point (CoMP) transmission schemes for interference reduction, Cooperative Relaying are some of potential features to enhance the Next Generation Mobile Network.

Next-generation optical access seamless evolution: concluding results of the European FP7 Project OASE

Abstract: Increasing bandwidth demand drives the need for next-generation optical access (NGOA) networks that can meet future end-user service requirements. This paper gives an overview of NGOA solutions, the enabling optical access network technologies, architecture principles, and related economics and business models. NGOA requirements (including peak and sustainable data rate, reach, cost, node consolidation, and open access) are proposed, and the different solutions are compared against such requirements in different scenarios (in terms of population density and system migration). Unsurprisingly, it is found that different solutions are best suited for different scenarios. The conclusions drawn from such findings allow us to formulate recommendations in terms of technology, strategy, and policy. The paper is based on the main results of the European FP7 OASE Integrated Project that ran between January 1, 2010 and February 28, 2013.

Use the Force (or something) - Pressure and Pressure- Like Input for Mobile Music Performance

Abstract: force is an important dimension for percussive musical instruments such as the piano. We explore three possible mechanisms how to get impact forces on mobile multi-touch devices: using built-in accelerometers, the pressure sensing capability of Android phones, and external force sensing resistors. We find that accelerometers are difficult to control for this purpose. Android's pressure sensing shows some promise, especially when combined with augmented playing technique. Force sensing resistors can offer good dynamic resolution but this technology is not currently offered in commodity devices and proper coupling of the sensor with the applied impact is difficult. Keywordsimpact, pressure, multi-touch, mobile phone, mobile music making.

Comparison of PAM and CAP Modulation Schemes for Data Transmission Over SI-POF

Abstract: An experimental comparison of multilevel modulation schemes for polymer optical fiber (POF) transmission systems is shown in this letter. The performance of a non-return-to-zero, pulse-amplitude modulation (PAM), and carrierless amplitude phase (CAP) modulation was tested under the different conditions, including various link lengths and fiber-coupled power. As an optical transmitter, the commercial laser diode operating at 655 nm was used. A maximum bit rate of 5 Gb/s over 50-m 1-mm step-index POF link was achieved with 16-CAP modulation format at +6 dBm fiber-coupled power and a bit-error ratio of 10-3. Over 100 m, a maximum bit rate of 3.4 Gb/s was realized with 4-PAM.