Kardiale komplikasies van chroniese nierversaking is die vernaamste oorsake van dood by hemodialise pasiënte. Na aanleiding hiervan is dit vir die verpleegkundige noodsaaklik om oor genoegsame ken­ nis te beskik — nie alleen op kardiale gebied nie, maar ook ten opsigte van die ander stelsels wat deur uremie beinvloed word. Die verpleegkundige moet ook die nodige vaardigheid bemeester om die pas...

A simple and energy efficient source coded On/Off Keying modulation and near optimal error detection scheme for wireless applications is presented in this paper. Many low-power battery operated radio systems, especially for microsensor applications, has a need for saving power both at the system level and circuit level implementation. Our main objective in this paper is to come up with energy e...

There has been a significant improvement in high-speed electronics and optical components over the past few years, and this is one of the key enabling factors for high data rate transmission. Moreover, multilevel modulation formats, which encode information onto the carrier’s amplitude and phase, are necessary to increase the spectral efficiency of communication systems. For short-haul low cost...

40-bit OOK, 80-bit QPSK and 120-bit 16-QAM packets are generated with spectral efficiencies of 1, 2 and 3 b/s/Hz, exploiting concepts from OAWG. Results demonstrate potential for a Tb/s OAWG based transmitter using GHz electronics. ©2009 Optical Society of America OCIS codes: (320.5540) Pulse Shaping; (060.1660) Coherent Communications; (320.7100) Ultrafast Measurements.

— We transmitted 4x28 Gbit/s over 5-km standard GI-MMF using four different mode groups in combination with direct detection and on-off-keying format (OOK). Due to the square-law detection in the receiver MIMO processing is not effective. Therefore proper mode group selective multiplexing and de-multiplexing is essential.

This paper presents a comparative study of the performance of commonly used modulation techniques for Indoor Optical Wireless Communications. Some commonly used modulation schemes such as OOK, PPM, PIM and MSM are discussed and their properties are compared with respect to their power and bandwidth requirements. Their relative merits and demerits are also highlighted. The results were computed ...