Adaptation techniques in MIMO
First Claim
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1. A feedback method comprising:
- receiving, at a mobile terminal comprising a plurality of receiver types, a reference signal from multiple antennas on a base station;
determining a mapping of signal to interference and noise ratio to modulation and coding scheme for a given receiver type of the plurality of receiver types, wherein the given receiver type is the receiver type utilized for receiving data, wherein only one receiver type of the plurality of receiver types is utilized for receiving data, and wherein the modulation and coding scheme for a same signal to interference and noise ratio thus is different for two different types of receiver in one instance;
calculating a signal to interference and noise ratio from the reference signal; and
determining a modulation and coding scheme based on the calculated signal to interference and noise ratio and the determined mapping.
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Abstract
A method of the multiple input multiple output feedback is disclosed. In accordance with an embodiment of the invention, the multiple input multiple output feedback method includes a receiver receiving a reference signal from a base station and calculating a signal to interference and noise ratio from the received reference signal. The method further includes determining a modulation and coding scheme based on the signal to interference and noise ratio and a receiver type.
14 Citations
25 Claims
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1. A feedback method comprising:
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receiving, at a mobile terminal comprising a plurality of receiver types, a reference signal from multiple antennas on a base station; determining a mapping of signal to interference and noise ratio to modulation and coding scheme for a given receiver type of the plurality of receiver types, wherein the given receiver type is the receiver type utilized for receiving data, wherein only one receiver type of the plurality of receiver types is utilized for receiving data, and wherein the modulation and coding scheme for a same signal to interference and noise ratio thus is different for two different types of receiver in one instance; calculating a signal to interference and noise ratio from the reference signal; and determining a modulation and coding scheme based on the calculated signal to interference and noise ratio and the determined mapping. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. An open loop MIMO feedback procedure comprising:
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estimating channel state information by receiving at a user end receiver comprising a plurality of receiver types at least one reference signal from transmitter antennas on a base station; determining a mapping of signal to interference and noise ratio to modulation and coding scheme for each available rank and for a given receiver type of the plurality of receiver types, wherein the given receiver type is the receiver type utilized for receiving data, wherein only one receiver type of the plurality of receiver types is utilized for receiving data, and wherein the modulation and coding scheme for a same signal to interference and noise ratio thus is different for two different types of receiver in one instance; calculating an average signal to interference and noise ratio from the estimated channel information at the user end receiver; determining a modulation and coding scheme for each available rank based on the calculated average signal to interference and noise ratio and the determined mapping; calculating a throughput rate for each rank and the corresponding modulation and coding scheme associated for that rank; selecting a rank and modulation and coding scheme to maximize the throughput rate; and sending a feedback information from the user end receiver to the base station, the feedback information comprising the selected rank and modulation and coding scheme. - View Dependent Claims (11, 12, 13, 14, 15)
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16. A closed loop MIMO feedback procedure comprising:
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receiving, at a mobile terminal comprising a plurality of receiver types, at least one reference signal from a base station; determining a mapping of signal to interference and noise ratio to modulation and coding scheme for a given receiver type of the plurality of receiver types, wherein the given receiver type is the receiver type utilized for receiving data, wherein only one receiver type of the plurality of receiver types is utilized for receiving data, and wherein the modulation and coding scheme for a same signal to interference and noise ratio thus is different for two different types of receiver in one instance; calculating a rank and a precoding matrix from the received reference signal; calculating a signal to interference and noise ratio (SINR) for each layer from the precoding matrix; selecting a modulation and coding scheme based on the signal to interference and noise ratio and the determined mapping; and sending a feedback information to the base station, the feedback information comprising the selected modulation and coding scheme. - View Dependent Claims (17, 18, 19, 20, 21)
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22. A mobile terminal comprising a plurality of receiver types, comprising:
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a plurality of antennas for receiving signals from a base station, the plurality of antennas configured to receive reference signals transmitted from antennas on a base station and to transmit a feedback information to the base station; and a processor configured to determine a mapping of signal to interference and noise ratio to modulation and coding scheme for a given receiver type of the plurality of receiver types, wherein the given receiver type is the receiver type utilized for receiving data, wherein only one receiver type of the plurality of receiver types is utilized for receiving data, and wherein the modulation and coding scheme for a same signal to interference and noise ratio thus is different for two different types of receiver in one instance, and further configured to receive the reference signal from the plurality of antennas, the processor still further configured to calculate a signal to interference and noise ratio from the reference signal and to determine a modulation and coding scheme based on the signal to interference and noise ratio and the determined mapping, wherein the processor is configured to submit the feedback information comprising the modulation and coding scheme to the plurality of antennas. - View Dependent Claims (23, 24)
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25. A mobile terminal comprising a plurality of receiver types, comprising:
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antennas for transmitting and receiving signals to and from a base station; at least one processor for running software, the software comprising code for determining a mapping of signal to interference and noise ratio to modulation and coding scheme for a given type of the plurality of receiver types, wherein the given receiver type is the receiver type utilized for receiving data, wherein only one receiver type of the plurality of receiver types is utilized for receiving data, and wherein the modulation and coding scheme for a same signal to interference and noise ratio thus is different for two different types of receiver in one instance, and for calculating a signal to interference and noise ratio from a reference signal received at the antennas, and for determining a modulation and coding scheme based on the signal to interference and noise ratio and the determined mapping; and at least one memory unit for storing the software run on the at least one processor.
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Specification