DocumentCode :
2889133
Title :
ISI analysis in network MIMO OFDM systems with insufficient cyclic prefix length
Author :
Kotzsch, Vincent ; Rave, Wolfgang ; Fettweis, Gerhard
Author_Institution :
Dept. of Mobile Commun. Syst., Tech. Univ. Dresden, Dresden, Germany
fYear :
2010
fDate :
19-22 Sept. 2010
Firstpage :
189
Lastpage :
193
Abstract :
We consider a cellular network MIMO OFDM system where cooperating base stations apply joint signal processing to the receive signals of several users. In this situation, due to geometry, the problem of unavoidable differences in time of arrival between the users´ signals occurs. As a result, symbol timing offsets can be larger than the cyclic prefix, which leads to OFDM inter-symbol interference. In addition to the multiuser interference, a coupling between adjacent subcarriers and consecutive OFDM symbols is induced in such scenarios. In this paper, we analyze the multi-user joint detection performance in systems with distance dependent asynchronous interference and pathloss environments for different channel delays as well as fixed cyclic prefix length. To this end we use an exact expression for the post equalization SINR that is used for the evaluation in numerical simulations. The system level cell setup considers two user positioning models based on a hexagonal cell geometry with varying cell radii.
Keywords :
MIMO communication; OFDM modulation; cellular radio; intersymbol interference; multiuser detection; ISI analysis; OFDM intersymbol interference; adjacent subcarrier coupling; cell radii; cellular network MIMO OFDM system; channel delays; distance dependent asynchronous interference; fixed cyclic prefix length; hexagonal cell geometry; joint signal processing; multiuser interference; multiuser joint detection performance; numerical simulations; pathloss environments; symbol timing offsets; user positioning models; Base stations; Interference; MIMO; Multiuser detection; OFDM; Signal to noise ratio; Timing;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Wireless Communication Systems (ISWCS), 2010 7th International Symposium on
Conference_Location :
York
ISSN :
2154-0217
Print_ISBN :
978-1-4244-6315-2
Type :
conf
DOI :
10.1109/ISWCS.2010.5624259
Filename :
5624259
Link To Document :
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