Performance Analysis for Different Modulation Schemes in MIMO for LTE and WLAN

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Executive Summary

Next generation wireless systems will use a combination of large system bandwidths and multiple antennas (MIMO) to deliver very high data rate services. The efficient detection of MIMO signals at the receiver can be a challenging task. Zero-Forcing (ZF) and Minimum Mean Square Error (MMSE) detection schemes are simple and effective techniques for retrieving multiple transmitted data streams at the receiver. This paper compares the performance of various MIMO detectors for LTE and WLAN systems with linear detector such as ZF and MMSE in spatial multiplexing environment. Optimal MMSE receiver is shown to outperform low complexity ZF receiver for lower modulation schemes. For higher modulation schemes, performance of ZF and MMSE is also compared and analyzed.

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