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- W1845439284 abstract "This paper explores the use of quasi-static frequency-domain antenna combining weights for multi-user (e.g., SDMA) or multi-stream (e.g., MIMO) communication systems operating in rapidly time-varying frequency-selective channels. By implementing combining weights that are constant across a time slot but are updated from slot-to-slot (i.e., quasi-static), great computational complexity savings can be realized compared to calculating new weights at each data block within a time slot. The quasi-static weights are computed by first modeling, the time-varying channel for each user as the superposition of multiple time-invariant channels, called Doppler channels. The weights are then calculated based on all users' Doppler channels. These new weights work by using some of the degrees of freedom of the antenna array to suppress time variations as well as multiple access interference. Despite being fixed across a time slot, these weights can equalize and suppress SDMA interference even when the channel varies significantly over the slot. Simulation results show the effectiveness of these weights for equalization and interference suppression." @default.
- W1845439284 created "2016-06-24" @default.
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- W1845439284 date "2002-11-13" @default.
- W1845439284 modified "2023-09-26" @default.
- W1845439284 title "Quasi-static antenna array processing for rapidly time-varying channels" @default.
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- W1845439284 doi "https://doi.org/10.1109/icassp.2001.940274" @default.
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