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| Title | Exact BERs for M-QAM with MRC and channel estimation errors in Rician channels |
| Publication Type | Conference Paper |
| Year of Publication | 2005 |
| Authors | Ma, Y., R. Schober, and D. Zhang |
| Conference Name | Wireless Communications and Networking Conference, 2005 IEEE |
| Pagination | 967 - 972 Vol. 2 |
| Date Published | mar. |
| Keywords | arbitrary linear channel estimators, BER, bit error rate, channel estimation, channel estimation errors, correlated diversity branches, diversity reception, error statistics, imperfect channel estimation, least mean squares methods, M-level quadrature amplitude modulation, maximum ratio combining, minimum mean square error channel estimators, MMSE, MRC diversity, pilot-symbol assisted modulation, PSAM, quadrature amplitude modulation, rectangular M-QAM, Rician channels, sinc-interpolator-based channel estimators, square M-QAM, unbalanced diversity branches |
| Abstract | In this paper, we study the effect of imperfect channel estimation (ICE) on the performance of M-level quadrature amplitude modulation (M-QAM) with maximum ratio combining (MRC) and pilot-symbol assisted modulation (PSAM) in generalized Rician fading channels. Via a novel formulation of the bit error rate (BER) of M-QAM in terms of the distribution of new decision variables, we derive the exact BER of M-QAM with MRC diversity and channel estimation errors. Our new result is valid for both square and rectangular M-QAM, arbitrary linear channel estimators, and unbalanced and correlated diversity branches in Rician fading. Using our new results, we evaluate the performance of minimum mean square error (MMSE)- and sinc-interpolator-based channel estimators with PSAM, and present some interesting findings. |
| URL | http://dx.doi.org/10.1109/WCNC.2005.1424639 |
| DOI | 10.1109/WCNC.2005.1424639 |