Patent ID: 7545876
Filing Date: 2009-06-09
Classification: H04B,H04L

Abstract:
1. A method of a transmitter optimizing transmission of a plurality of data streams on a multiple-input multiple-output channel, the method comprising: reducing the multiple-input multiple-output channel for each transmission scheme to an equivalent single-input single-output channel for the transmission scheme, comprising; obtaining a first channel matrix of the multiple-input-multiple-output transmission channel; converting the first channel matrix to an equivalent second channel matrix for each transmission scheme, the multiple-input-multiple-output transmission channel using a plurality of transmission schemes, performing a singular value decomposition on the second channel matrix of each transmission scheme to obtain a channel gain of each transmission scheme using a predetermined procedure; calculating a total channel gain of each transmission scheme to obtain the equivalent single-input single-output channel for the transmission scheme; and repeating steps (a) to (d) on the plurality of transmission schemes to obtain a plurality of total channel gains, wherein a first channel gain for each transmission scheme is computed as a product of a minimum value of the first channel gain for each transmission scheme and a signal-to-noise ratio: and wherein the data stream that has been affected most in the multiple-input multiple-output channel corresponds to the minimum value; and the transmitter transmitting the plurality of data streams based on the single-input single-output channel for the transmission scheme.