Method and apparatus for modulation and coding scheme adaption in a MIMO system
View Patent ↗Method and apparatus for decoding a transmitted signal by a receiver in a MIMO system into a first estimate component for estimating a first signal, a first interference component indicating interference resulting from a correlation relationship among a set of signals to be transmitted, and a first noise component. A base station generates the transmitted signal from the set of signals through a coding process, the coding process defining a correlation relationship amongst the set of signals. The correlation information about the correlation relationship is transmitted to the receiver directly or by a dedicated reference symbol. The decoding is performed by determining a linear receiver filter for the first signal in accordance with the correlation information, and de-correlating the first signal and interferences.
1. An apparatus for signal processing in a communication system, the apparatus comprising:
a processor configured to generate a transmitted signal from a set of signals through a coding process, wherein the set of signals comprises a first signal and a plurality of other signals with a correlation relationship after the coding process; and
a transmitter configured to send the transmitted signal through a channel, the transmitted signal including correlation information about the correlation relationship among the set of signals through the channel, wherein the correlation information is related to a first interference component of the transmitted signal caused by the correlation relationship among the set of signals.
2. The apparatus of claim 1 , wherein the transmitter is configured to send the correlation information using one of a pilot signal, a control signal, or a dedicated reference symbol (DRS).
3. The apparatus of claim 1 , wherein the transmitted signal includes noise correlation information to indicate an impact of noise on the channel.
4. The apparatus of claim 1 , wherein the coding process comprises a linear zero-forcing precoding.
5. The apparatus of claim 1 , wherein the coding process comprises a linear regularized zero-forcing precoding.
6. The apparatus of claim 1 , wherein the coding process comprises a dirty-paper non-liner precoding.
7. The apparatus of claim 1 , wherein the correlation information is a correlation matrix R x =E[xx H ] or D=diag(R x ) −1 , wherein x=[x 1 x 2 . . . x K ] T is the set of signals.
8. The apparatus of claim 7 , wherein the first interference component is
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9. The apparatus of claim 1 , wherein the transmitter comprises a multi-user multiple input, multiple output (MIMO) system.
10. A method for signal processing in a communication system, comprising:
generating, by a processor, a transmitted signal from a set of signals through a coding process, wherein the set of signals comprises a first signal and a plurality of other signals with a correlation relationship after the coding process; and
sending, by a transmitter, the transmitted signal through a channel, the transmitted signal including correlation information about the correlation relationship among the set of signals through the channel, wherein the correlation information is related to a first interference component of the transmitted signal caused by the correlation relationship among the set of signals.
11. The method of claim 10 , wherein sending the transmitted signal comprises sending the correlation information using one of a pilot signal, a control signal, or a dedicated reference symbol (DRS).
12. The method of claim 10 , wherein the transmitted signal includes noise correlation information to indicate an impact of noise on the channel.
13. The method of claim 10 , wherein the coding process comprises a linear zero-forcing precoding.
14. The method of claim 10 , wherein the coding process comprises a linear regularized zero-forcing precoding.
15. The method of claim 10 , wherein the coding process comprises a dirty-paper non-liner precoding.
16. The method of claim 10 , wherein the correlation information is a correlation matrix R x =E[xx H ] or D=diag(R x ) −1 , wherein x=[x 1 x 2 . . . x K ] T is the set of signals.
17. The method of claim 16 , wherein the first interference component is
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18. The method of claim 10 , wherein the transmitter comprises a multi-user multiple input, multiple output (MIMO) system.