Title :
Guidelines for designing OFDM overlay systems
Author :
Berthold, Ulrich ; Jondral, Friedrich K.
Author_Institution :
Inst. fur Nachrichtentechnik, Karlsruhe Univ.
Abstract :
Due to the increasing demand in mobile communications it is necessary to use the available spectrum as efficiently as possible. In this paper we focus on the concept of overlay scenarios where two different systems operate independently in the same frequency band. We describe a general set of characteristic parameters for licensed systems using FDMA (frequency division multiple access). In the context of these licensed systems especially OFDM (orthogonal frequency-division multiplexing) is a suitable technique to operate an additional system in a coexistence mode. Based on the parameter sets of both systems we derive constraints and guidelines on the design of OFDM overlay systems
Keywords :
OFDM modulation; frequency division multiple access; mobile radio; FDMA; OFDM; frequency division multiple access; guideline; licensed system; mobile communication; orthogonal frequency-division multiplexing; overlay scenario; Current measurement; Density measurement; Frequency conversion; Frequency division multiaccess; Frequency division multiplexing; Guidelines; Mobile communication; OFDM; Time division multiple access; Time frequency analysis;
Conference_Titel :
New Frontiers in Dynamic Spectrum Access Networks, 2005. DySPAN 2005. 2005 First IEEE International Symposium on
Conference_Location :
Baltimore, MD, USA
Print_ISBN :
1-4244-0013-9
DOI :
10.1109/DYSPAN.2005.1542683