Analysis of BER According to Spatial and Frequency Diversity Gain in Uplink SC-FDMA with SIMO Systems 


Vol. 39,  No. 9, pp. 535-547, Sep.  2014


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  Abstract

We investigate BER (Bit Error Ratio) performance according to the gain of spatial and frequency diversities in uplink SC-FDMA of SIMO (Single Input Multiple Output) systems. The main results of the analysis in this paper are as follows. First, we prove that performance of integrated system for considering spatial and frequency diversity combining in parallel is equivalent with the performance of sequential system for performing diversity combining in sequence. By signal modeling, it is demonstrated that the performances of both systems are the same when the frequency diversity combining technique of the sequential system is equal to diversity combining technique of the integrated system, and spatial diversity combining technique of the sequential system is performed as MRC in advance of frequency diversity combining. Secondly, it is found that effect on the BER performance is different according to the gain of spatial and frequency diversities, respectively. The frequency diversity gain increases by increasing the number of subcarrier. It might affect the performance improvement of high SNR(Signal to Noise Ratio) while it maintains gap between performances of ZF(Zero Forcing) and MMSE(Minimum Mean Square Error) in frequency diversity combining schemes. Also, spatial diversity gain increases as the number of receiving antennas increases. It means that it can reduce performance gap between ZF and MMSE in frequency diversity combining schemes by increasing the number of receiving antennas. In addition, it might affect the performance improvement of the whole SNR. Finally, through the analysis of performance according to the spatial diversity gain, the performance of ZF in frequency diversity combining is equal to the MMSE if the number of receiving antennas is 6 or more.

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  Cite this article

[IEEE Style]

J. Lee and K. Choi, "Analysis of BER According to Spatial and Frequency Diversity Gain in Uplink SC-FDMA with SIMO Systems," The Journal of Korean Institute of Communications and Information Sciences, vol. 39, no. 9, pp. 535-547, 2014. DOI: .

[ACM Style]

Jin-Hui Lee and Kwonhue Choi. 2014. Analysis of BER According to Spatial and Frequency Diversity Gain in Uplink SC-FDMA with SIMO Systems. The Journal of Korean Institute of Communications and Information Sciences, 39, 9, (2014), 535-547. DOI: .

[KICS Style]

Jin-Hui Lee and Kwonhue Choi, "Analysis of BER According to Spatial and Frequency Diversity Gain in Uplink SC-FDMA with SIMO Systems," The Journal of Korean Institute of Communications and Information Sciences, vol. 39, no. 9, pp. 535-547, 9. 2014.

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pISSN : 1226 - 4717
eISSN : 2287 - 3880