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| Title | Effect of channel estimation errors on M-QAM with GSC diversity in fading channels |
| Publication Type | Conference Paper |
| Year of Publication | 2005 |
| Authors | Ma, Y., D. Zhang, and R. Schober |
| Conference Name | Communications, 2005. ICC 2005. 2005 IEEE International Conference on |
| Pagination | 2190 - 2194 Vol. 4 |
| Date Published | may. |
| Keywords | BER, bit error rate, channel estimation, channel estimation error, diversity reception, error statistics, generalized selection combining, GSC diversity, imperfect channel estimation, M-QAM, Nakagami fading channel, pilot-symbol assisted modulation, quadrature amplitude modulation, Rayleigh channels, Rayleigh fading channel, Rician channels, Rician fading channel, signal-to-noise ratio |
| 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 generalized selection combining (GSC) diversity and pilot-symbol assisted modulation (PSAM) in several types of fading channels (including Rayleigh, Rician and Nakagami fading). We provide a novel formulation of the bit error rate (BER) of M-QAM with ICE in terms of the signal-constellation-dependent effective signal-to-noise ratio (SNR), which allows us to derive the accurate BER results of square and rectangular M-QAM with GSC and channel estimation errors. Our new BER expressions are general and yet easy to evaluate, and simplify to a closed-form expression for the Rayleigh fading case. Using our new analytical result, we evaluate the performance of M-QAM with PSAM, and present some interesting findings. |
| URL | http://dx.doi.org/10.1109/ICC.2005.1494725 |
| DOI | 10.1109/ICC.2005.1494725 |