Wireless receiver estimating power of interference
AssigneeFujitsu Limited
InventorsAkira Ito, Masahiko Shimizu, Koji Matsuyama, Yoji Sugawara, Shunji Miyazaki
Life of this patent
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Abstract
By providing a interference power estimation unit obtaining the power of interference in a common pilot signal with ten symbols in one slot and outputting the power of interference as the estimate of the amount of interference in the data signal's pilot signal and a signal-to-interference power ratio calculation unit calculating a signal-to-interference power ratio (SIR) using an output of the interference power estimation unit, in a spread spectrum communication method, a correct SIR can be estimated even when the number of symbols of an individual pilot signal in the slot of the data channel is small.
Claims12
A wireless receiver estimating power of interference in an incoming data signal, comprising
- an interference power estimation unit obtaining power of interference in a common pilot signal and outputting the power of interference as an estimate of an amount of interference in a data channel's pilot signal.
A wireless receiver estimating power of interference in an incoming data signal, comprising:
- an interference power estimation unit obtaining power of interference in a common pilot signal and outputting the power of interference as an estimate of an amount of interference in a data channel's pilot signal;
- a data channel interference power calculation unit calculating power of interference in a data channel's pilot signal;
- a switch unit outputting an output of the interference power estimation unit when the number of pilot symbols in one slot of a data channel is small and outputting an output of the data channel interference power calculation unit when the number of symbols is large;
- and
- a signal-to-interference power ratio (SIR) calculation unit calculating the SIR of the data signal.
A wireless receiver estimating power of interference in an incoming data signal, comprising:
- an interference power estimation unit obtaining power of interference in a common pilot signal and outputting the power of interference as an estimate of an amount of interference in a data channel's pilot signal;
- a data channel interference power calculation unit calculating power of interference in a data channel's pilot signal;
- a weight averaging unit averaging weights of an output of the interference power estimation unit and an output of the data channel interference power calculation unit;
- and
- a signal-to-interference power ratio calculation unit calculating an SIR of the data signal using an output of the weight averaging unit.
A wireless receiver estimating power of interference in an incoming data signal, comprising
- interference power obtaining means for obtaining power of interference in a common pilot signal;
- and
- estimate output means for outputting the power of interference as an estimate of power of interference in a data channel's pilot signal.
A wireless receiver estimating power of interference in an incoming data signal, comprising:
- interference power estimation means for obtaining power of interference in a common pilot signal and outputting the power of interference as an estimate of an amount of interference in a data channel's pilot signal;
- data channel interference power calculation mean for calculating power of interference in a data channel's pilot signal;
- switch means for outputting an output of the interference power estimation means when the number of pilot symbols in one slot of a data channel is small and outputting an output of the data channel interference power calculation means when the number of symbols is large;
- and
- signal-to-interference power ratio (SIR) calculation means for calculating an SIR of the data signal using an output of the switch means.
A wireless receiver estimating power of interference in an incoming data signal, comprising:
- interference power estimation means for obtaining power of interference in a common pilot signal and outputting the power of interference as an estimate of an amount of interference in a data channel's pilot signal;
- data channel interference power calculation means for calculating power of interference in a data channel's pilot signal;
- weight averaging means for averaging weights of an output of the interference power estimation means and an output of the data channel interference power calculation means;
- and
- signal-to-interference power ratio calculation means for calculating an SIR of the data signal using an output of the weight averaging means.
Dependencies are inferred from the claim text.