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In modern downlink wireless communication systems, multiple antennas are being increasingly used at the transmitter to support multiple users. To increase the sum-rate, it has been shown that downlink channel state information (CSI) must be utilized at the transmitter. Especially in frequency division duplexing (FDD) systems, feedback of this CSI is necessary from each of the users to provide the...
The theory of multiple-input-multiple-output (MIMO) technology has been well developed to increase fading channel capacity over single-input-single-output (SISO) systems. This capacity gain can often be leveraged by utilizing channel state information at the transmitter and the receiver. Users make use of this channel state information for transmit signal adaptation. In this correspondence, we derive...
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