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MIMO strategies for equal-rate data streams

This paper explores strategies for multiple-input/multiple-output (MIMO) communications where the number of data streams is fixed and each stream has the same modulation type. For the fixed data stream case, transmit and receive weights based on the singular value decomposition (SVD) approach may not give the best BER performance. This paper explores two alternate strategies to the SVD approach for jointly calculating the transmit and receive weights based on minimizing the mean-squared error summed over all data streams. The first strategy finds linear transmit and receive weights, and the second strategy finds linear transmit weights and successive cancellation receive weights.