A solution for BER performance and energy efficiency improvements of OFDM-CDMA system with pilot tone

Author

Urosevic, U. ; Veljovic, Z. ; Pejanovic-Djurisic, M.

Author_Institution

Fac. of Electr. Eng., Univ. of Montenegro, Podgorica, Montenegro

fYear

2012

fDate

21-25 May 2012

Firstpage

771

Lastpage

775

Abstract

In this paper, incorporation of MIMO concept is proposed as a solution for improving BER performance and energy efficiency of OFDM-CDMA downlink system with pilot tone and threshold detection combining (optimum TDC). The new presented system with MIMO included uses space-time block coding applied to two, three and four transmit antennas and it has an arbitrary number of receive antennas. BER (Bit Error Rate) performance in the case of Ricean frequency selective fading is evaluated for the original system as well as for the one with MIMO included. For that reason an adequate simulation model is developed. The results show that the proposed system significantly outperforms the OFDM-CDMA downlink system with pilot tone and optimum TDC. The proposed system provides greater energy efficiency and lower BER in comparison with the original system.

Keywords

OFDM modulation; Rician channels; code division multiple access; error statistics; frequency selective surfaces; space-time block codes; BER performance; MIMO concept; OFDM-CDMA downlink system; OFDM-CDMA system; Ricean frequency selective fading; bit error rate performance; energy efficiency improvements; optimum TDC; pilot tone; space-time block coding; threshold detection combining; Bit error rate; Energy efficiency; MIMO; OFDM; Receiving antennas; Signal to noise ratio; Transmitting antennas;

fLanguage

English

Publisher

ieee

Conference_Titel

MIPRO, 2012 Proceedings of the 35th International Convention

Conference_Location

Opatija

Print_ISBN

978-1-4673-2577-6

Type

conf

Filename

6240748