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Effective SNR Based MIMO Switching in Mobile WiMAX Systems
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- Authors
- Issue Date
- 2007-10
- Citation
- Proc. Wireless Broadband World Forum (WBWF), Oct. 2007
- Keywords
- Effective SNR ; Switching ; MIMO ; Mobile WiMAX System
- Abstract
- The mobile WiMAX system considers the use of (2×2)
multiple-input multiple-output (MIMO) schemes for
performance improvement. It is required for mobile
stations to appropriately switch the MIMO mode; space–
time block code (STBC) or vertical spatial multiplexing
(VSM). In this paper we consider a novel switching
scheme for the MIMO mode based on effective signal-tonoise
ratio. Assuming the use of a minimum mean square
error (MMSE) receiver for the VSM and a maximum ratio
combining receiver for the STBC, the threshold for the
mode switching is analytically derived in a closed form.
Simulation results show that the proposed switching
scheme outperforms conventional switching schemes in
terms of the capacity and outage probability.
- Language
- English
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