Walter Hirt

TL;DR: Although the proposed receiver works without channel state information and complex RAKE frontend, its performance compares favorably with that of a coherent 2PAM RAKE receiver of low order.

TL;DR: The key characteristics and capabilities of UWB-RT are discussed and where one expects to exploit them in applications are indicated and directions for future research are discussed.

TL;DR: In this article, the authors proposed a method for converting a pulse modulated signal to a radio frequency signal enableing use of applications and protocols designed for wireless optical links on radio frequency channels.

Abstract: Disclosed is an optical communication system enabling communication between several co-existing transmitting and receiving stations. In order to allow communication between the co-existing stations, a robust physical layer header (RPLH; 50) is employed which can be understood by all participating stations. This robust header (50) at least comprises a preamble (52) consisting of frames forming a periodic sequence of pulses, the number of slots per frame and the frame content being known to all participating stations. The preamble (52) serves for relative synchronization and carrier detection of the receiving stations. The robust header (50) further comprises a unique synchronization word (53) used for absolute synchronization of the receiving stations. This synchronization word (53) is followed by a control field (59) of fixed length and known structure. By means of this control field (59) the receiving stations are informed which modulation method will be used for the transmission of data. Under certain circumstances it is also useful to provide other control information in said control field (59) for communication link and network control. Furthermore, information may be exchanged to allow negotiation and/or adaptation of the data rate used for transmission. This allows to optimize the throughput depending on the conditions (quality) on the channel.

TL;DR: In this paper, a method for real-time, three-dimensional analysis of environmental operating conditions in a data center includes the following steps: high spatial resolution 3D measurements of one or more environmental variables in the data center made at a time t1 are obtained.