Abstract
This letter focuses on the performance analysis of the decorrelating receiver in multipath Rician faded CDMA channels. M-ary QAM scheme is employed to improve the spectral efficiency. Approximate expressions are first derived for the two performance indexes: the average symbol error rate (SER) and the average bit error rate (BER) when the decorrelating-first receiver perfectly knows the channel information of the user of interest. To achieve desirable closed-form expressions of the SER and the BER, we exploit results in large system analysis and make assumptions of a high signal-to-interference ratio (SIR) and/or a small Rician K-factor. To measure the receiver performance in the practical scenario, we further derive expressions to approximate the average SER and BER of the decorrelating-first scheme with channel uncertainty. Simulation results demonstrate that the analytical results can also be employed to evaluate the performance of the combining-first receiver.
Original language | English |
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Article number | 1687713 |
Pages (from-to) | 2009-2016 |
Number of pages | 8 |
Journal | IEEE Transactions on Wireless Communications |
Volume | 5 |
Issue number | 8 |
DOIs | |
Publication status | Published - Aug 2006 |
Externally published | Yes |
Keywords
- Decorrelating-first/combining-first receiver
- M-ary QAM
- Multipath Rician fading
- Symbol/bit error rate