Power control for partial channel-state information (CSI) multiple-input, multiple-output (MIMO) systems

A method for controlling transmit power for a plurality of data streams in a multiple-input multiple-output (MIMO) communication system, comprising:

• processing a plurality of received symbol streams in accordance with a channel correlation matrix inversion (CCMI) or a minimum mean square error (MMSE) spatial receiver processing technique to provide a plurality of detected data streams;
• estimating signal-to-noise-and-interference ratios (SNRs) of the plurality of detected data streams;
• identifying each SNR that exceeds a setpoint;
• and
• determining an adjusted transmit power for each detected data stream associated with an SNR exceeding the setpoint.

A method for controlling transmit power for a plurality of data streams in a multiple-input multiple-output (MIMO) communication system, comprising:

• processing a plurality of received symbol streams in accordance with a channel correlation matrix inversion with successive interference cancellation (CCMI-SC) or a minimum mean square error with successive interference cancellation (MMSE-SC) receiver processing technique and based on a particular detection order to provide a plurality of detected data streams;
• estimating signal-to-noise-and-interference ratios (SNRs) of the plurality of detected data streams;
• identifying each SNR that exceeds a setpoint;
• and
• determining an adjusted transmit power for each detected data stream associated with an SNR exceeding the setpoint.

A method for controlling transmit power for a plurality of data streams in a multiple-input multiple-output (MIMO) communication system, comprising:

• processing a plurality of received symbol streams in accordance with a particular receiver processing technique to provide a plurality of detected data streams;
• estimating signal-to-noise-and-interference ratios (SNRs) of the plurality of detected data streams;
• identifying a set of one or more detected data streams each associated with an SNR that exceeds an associated operating point;
• and
• determining an adjusted transmit power for each detected data stream in the set to move the SNR toward the associated operating point.

A method for determining an amount of transmit power required to achieve a specified spectral efficiency in a wireless multi-channel communication system, comprising:

• determining a first set of transmission channels selectable for use for data transmission;
• estimating performance of each of transmission channel in the first set, wherein each transmission channel is associated with a particular spectral efficiency;
• determining a second set of transmission channels to be used for data transmission, wherein the second set include a minimum number of transmission channels from the first set with an aggregate spectral efficiency that meets the specified spectral efficiency;
• and
• determining transmit power for each of the transmission channels in the second set to reduce overall transmit power while achieving the specified spectral efficiency.

A method for controlling transmit power for a plurality of data streams transmitted on a plurality of transmission channels in a wireless multi-channel communication system, comprising:

• processing a plurality of received symbol streams in accordance with a particular receiver processing technique to provide a plurality of detected data streams;
• estimating signal-to-noise-and-interference ratios (SNRs) of the plurality of detected data streams;
• determining a difference between the SNR of each data stream and a setpoint associated with the data stream;
• and
• determining an adjusted transmit power for each detected data stream based on the determined difference between the SNR and the setpoint.

A memory communicatively coupled to a digital signal processing device (DSPD) capable of interpreting digital information to:

• process a plurality of received symbol streams in accordance with a particular receiver processing technique to provide a plurality of detected data streams;
• estimate signal-to-noise-and-interference ratios (SNRs) of the plurality of detected data streams;
• identify each SNR that exceeds a setpoint;
• and
• determine an adjusted transmit power for each detected data stream associated with an SNR exceeding the setpoint.

A computer program product for controlling transmit power for a plurality of data streams in a wireless multi-channel communication system, comprising:

• code for processing a plurality of received symbol streams in accordance with a particular receiver processing technique to provide a plurality of detected data streams;
• code for estimating signal-to-noise-and-interference ratios (SNRs) of the plurality of detected data streams;
• code for identifying each SNR that exceeds a setpoint;
• code for determining an adjusted transmit power for each detected data stream associated with an SNR exceeding the setpoint;
• and
• a computer-usable medium for storing the codes

An integrated circuit in a wireless communication system, comprising:

• means for processing a plurality of received symbol streams in accordance with a particular receiver processing technique to provide a plurality of detected data streams;
• means for estimating signal-to-noise-and-interference ratios (SNRs) of the plurality of detected data streams;
• means for identifying each SNR that exceeds a setpoint;
• and
• means for determining an adjusted transmit power for each detected data stream associated with an SNR exceeding the setpoint.

A receiver apparatus in a multi-channel communication system, comprising:

• means for processing a plurality of received symbol streams in accordance with a particular receiver processing technique to provide a plurality of detected data streams;
• means for estimating signal-to-noise-and-interference ratios (SNRs) of the plurality of detected data streams;
• means for identifying each SNR that exceeds a setpoint;
• and
• means for determining an adjusted transmit power for each detected data stream associated with an SNR exceeding the setpoint.

A transmitter unit in a wireless communication system, comprising:

• a transmit (TX) data processor operative to code a plurality of data streams based on one or more coding and modulation schemes to provide a plurality of modulation symbol streams, and to scale each modulation symbol stream based on a respective weight corresponding to an amount of transmit power to be used for the corresponding data stream;
• a plurality of transmitters operative to process the plurality of scaled symbol streams to provide a plurality of modulated signals suitable for transmission over a communication channel;
• and
• a controller operative to receive channel-state information (CSI) indicative of power adjustments for one or more data streams, wherein the power adjustments are derived by
• processing a plurality of received symbol streams in accordance with a particular receiver processing technique to provide a plurality of detected data streams,
• estimating signal-to-noise-and-interference ratios (SNRs) of the plurality of detected data streams,
• identifying each SNR that exceeds a setpoint, and
• determining power adjustment for each detected data stream associated with an SNR exceeding the setpoint.