Frequency domain equalization for time varying channels
AssigneeQUALCOMM Incorporated
InventorsEen-Kee Hong, Le Nam Tran, Peter Gaal
Life of this patent
Estimating the term…
Abstract
Systems and methods for a wireless communication system are provided. The method includes estimating a time-variation of a channel through which the wireless communication system transmits. This also includes decreasing the estimated time-variation of the channel from a signal transmitted by the wireless communications system.
Claims35
A method for a wireless communication terminal, comprising:
- estimating a time variation of a channel through which the wireless communication terminal transmits or receives information;
- and
- decreasing the estimated time variation of the channel by subtracting a value representative of a degradation of a corresponding equivalence between the time domain and the frequency domain from a frequency domain equalization (FDE) of a signal transmitted or received by the wireless communications terminal.
A communications apparatus, comprising:
- a memory that retains instructions for determining a time variation for a received signal in a wireless communications terminal, where the time variation is decreased by subtracting a value representative of a degradation of a corresponding equivalence between the time domain and the frequency domain from a frequency domain equalization;
- and
- a processor that executes the instructions.
A communications apparatus, comprising:
- means for determining a time variation in a device;
- means for determining a frequency domain equalization in the device;
- and
- means for reducing the time variation by subtracting a value representative of a degradation of a corresponding equivalence between the time domain and the frequency domain from the frequency domain equalization in the device.
A machine-readable medium having stored thereon machine-executable instructions for:
- determining a time variation in a device;
- determining a frequency domain equalization in the device;
- and
- reducing the time variation by subtracting a value representative of a degradation of a corresponding equivalence between the time domain and the frequency domain from the frequency domain equalization in the device.
A processor that executes the following instructions:
- determining a time variation from received signals in a device;
- performing a frequency domain equalization in the device;
- and
- reducing the time variation by subtracting a value representative of a degradation of a corresponding equivalence between the time domain and the frequency domain from the frequency domain equalization in the device via an iterative process.
A method for a wireless communication access point, comprising:
- estimating a time variation of a channel through which the wireless communication access point transmits or receives information;
- and
- reducing the estimated time variation of the channel by subtracting a value representative of a degradation of a corresponding equivalence between the time domain and the frequency domain from a frequency domain equalization (FDE) of a signal transmitted or received by the wireless communications access point.
A communications apparatus, comprising:
- a memory that retains instructions for determining a time variation for a received signal in a wireless communications access point, where the time variation is reduced by subtracting a value representative of a degradation of a corresponding equivalence between the time domain and the frequency domain from a frequency domain equalization;
- and
- a processor that executes the instructions.
A communications apparatus, comprising:
- means for determining a time variation at an access point;
- means for determining a frequency domain equalization at the access point;
- and
- means for reducing the time variation by subtracting a value representative of a degradation of a corresponding equivalence between the time domain and the frequency domain from the frequency domain equalization at the access point.
A machine-readable medium having stored thereon machine-executable instructions for:
- determining a time variation from received signals at an access point;
- determining a frequency domain equalization in accordance with the received signals;
- and
- reducing the time variation by subtracting a value representative of a degradation of a corresponding equivalence between the time domain and the frequency domain from the frequency domain equalization.
A processor that executes the following instructions:
- determining a time variation from received signals at an access point;
- performing a frequency domain equalization from the received signals;
- and
- reducing the time variation by subtracting a value representative of a degradation of a corresponding equivalence between the time domain and the frequency domain from the frequency domain equalization at the access point.
Dependencies are inferred from the claim text.