Back to results
US 8,711,760 B2Granted
Method and apparatus to adjust received signal
AssigneeIntel Corporation
InventorAssaf Kasher
Life of this patent
Estimating the term…
Abstract
A wireless communication device, a wireless communication system and a method to adjust transmitted signals constellation in a maximum likelihood multiple-input-multiple-output receiver by transmitting an EVM deviation value. The EVM deviation value may be added to a pre-stored error value at the receiver.
Claims19
A method comprising:
- estimating at a multiple-input-multiple-output (MIMO) transmitter a transmission noise level of said MIMO transmitter;
- calculating at said MIMO transmitter an error vector magnitude (EVM) deviation value by comparing the estimated transmission noise level of said MIMO transmitter to stored noise values;
- and
- transmitting a frame from said MIMO transmitter, wherein the frame includes a field including said EVM deviation value, said EVM deviation value indicating a quality of the estimated transmission noise level of said MIMO transmitter in relation to a predefined noise level for a transmitted constellation of data streams.
1 more element
A method of adjusting a received signal in a multiple-input-multiple-output receivers system, the method comprising:
- receiving from a transmitter a deviation of an error vector magnitude (EVM) value with a received data stream, the EVM deviation value indicating a quality of a transmission noise level of said transmitter in relation to a predefined noise level;
- detecting a symbol from the received data stream using a maximum likelihood detection scheme;
- adding the deviation EVM value to a pre-stored EVM value;
- and
- placing the symbol on a constellation point, based on a result of said adding.
2 more elements
A wireless communication device comprising:
- a multiple-input-multiple-output (MIMO) receivers system to receive from a MIMO transmitter a deviation of an error vector magnitude (EVM) value with a received data stream, the EVM deviation value indicating a quality of a transmitter noise of said MIMO transmitter in relation to a predefined noise level;
- a memory to store in a table a pre-stored EVM value;
- and
- a detector to detect a symbol from the received data stream using a maximum likelihood detection scheme, to adjust a received signal for the transmitter noise of said MIMO transmitter by adding the deviation EVM value to the pre-stored EVM value and to place the symbol on a constellation point.
1 more element
A multiple-input-multiple-output (MIMO) transmitter comprising:
- a noise estimator to estimate a transmission noise level of said MIMO transmitter;
- and
- an error vector magnitude (EVM) deviation value generator to calculate an EVM deviation value by comparing the estimated transmission noise level of said MIMO transmitter to stored noise values;
- said MIMO transmitter to transmit a frame comprising a field including said EVM deviation value, said EVM deviation value indicating a quality of the estimated transmission noise level of said MIMO transmitter in relation to a predefined noise level for a transmitted constellation of data streams.
1 more element
A wireless communication system comprising:
- an antenna array operably coupled to a multiple-input-multiple-output (MIMO) receivers system to receive from a MIMO transmitter a deviation of an error vector magnitude (EVM) value with a received data stream, the EVM deviation value indicating a quality of a transmitter noise of said MIMO transmitter in relation to a predefined noise level;
- and
- a detector to detect a symbol from the received data stream using a maximum likelihood detection scheme, and to add the deviation EVM value to a pre-stored EVM value in order to place the symbol on a constellation point.
Dependencies are inferred from the claim text.