Uplink symbol error rate analysis of multicell multiuser‐multiple‐input–multiple‐output systems with minimum mean square error receiver under pilot contamination.

Cao, Juan; Wang, Dongming; Duan, Xiaoxia; Li, Jiamin; You, Xiaohu

This paper considers the uplink of a multicell multiuser multiple‐input‐multiple‐output (MIMO) time‐division duplexing system, where K mobile users in the target cell send their uncoded M‐ary phase shift keying (M‐PSK) signals to the target base station (BS) equipped with a linear minimum mean square error (MMSE) receiver in the presence of receiver antenna correlations. By employing the equivalent channel model, the uplink is analysed in terms of symbol error rate (SER), giving approximated closed‐form expressions. The complicated functions of the SER can be simplified for the case where all the eigenvalues of the correlation matrix of the target BS are identical or distinct. It is proved that in the high signal to noise ratio (SNR) region, the SER is independent of the correlations between the BS antennas. And due to the existence of pilot contamination and intercell interference, the SER tends to a constant whose value is depended on the number of mobile users in each cell and the interference strength between the cells as well. Finally computer simulations are conducted to show that our approximated expressions have good performance in low SNR even for not large K.

MEAN square algorithms; SYMBOL error rate; PHASE shift keying; TIME division multiple access; MULTIUSER computer systems; LEAST squares; MIMO systems

IET Communications (Wiley-Blackwell), 2016, Vol 10, Issue 9, p1121

1751-8628

Academic Journal

10.1049/iet-com.2015.0765