Distortion compensation apparatus and method
Distortion compensation apparatus and method
 CN 101,753,105 B
 Filed: 12/18/2009
 Issued: 06/17/2015
 Est. Priority Date: 12/18/2008
 Status: Active Grant
First Claim
1. a device for compensation of distortion, this device for compensation of distortion comprises:
 Distortion compensation unit, it performs distortion compensation process by progression computing to transmitting;
Coefficient update unit, its based on export after power amplification process is carried out to the output of described distortion compensation unit transmit export feedback signal and described in transmit, upgrade the progression operation coefficient group for described progression computing;
Initial coefficients memory, its storage can as the progression operation coefficient group corresponding with the described maximal power level transmitted of the initial value of the coefficient update process carried out for described coefficient update unit;
Power fluctuation detecting unit, the peak power transmitted described in its detection or the power fluctuation of average power, and, when power fluctuation being detected, from described initial coefficients memory, reading described progression operation coefficient group and described progression operation coefficient group is supplied to described coefficient update unit;
AndPower fluctuation determining unit, when the power fluctuation transmitted described in described power fluctuation detecting unit detects, described power fluctuation determining unit controls whether change coefficient by described coefficient update unit according to the amount of described power fluctuation,Wherein, when the power fluctuation transmitted described in detecting, described power fluctuation detecting unit reads the progression operation coefficient group corresponding with the described maximal power level transmitted from described initial coefficients memory, and this progression operation coefficient group is supplied to described coefficient update unit.
Chinese PRB Reexamination
Abstract
A distortion compensation apparatus includes a distortion compensation unit that performs distortion compensation processing on a transmission signal by a series operation, a coefficient update unit that updates a group of series operation coefficients used for the series operation based on a feedback signal of transmission signal output that is output after power amplification processing is performed on output of the distortion compensation unit and the transmission signal, an initial coefficient memory that stores the groups of series operation coefficients that become initial values for coefficient update processing by the coefficient update unit, and a power fluctuation detection unit that detects a power fluctuation of the transmission, signal and, when the power fluctuation is detected, reads the groups of series operation coefficients from the initial coefficient memory and provides the groups of series operation coefficients to the coefficient update unit.
6 Claims

1. a device for compensation of distortion, this device for compensation of distortion comprises:

Distortion compensation unit, it performs distortion compensation process by progression computing to transmitting; Coefficient update unit, its based on export after power amplification process is carried out to the output of described distortion compensation unit transmit export feedback signal and described in transmit, upgrade the progression operation coefficient group for described progression computing; Initial coefficients memory, its storage can as the progression operation coefficient group corresponding with the described maximal power level transmitted of the initial value of the coefficient update process carried out for described coefficient update unit; Power fluctuation detecting unit, the peak power transmitted described in its detection or the power fluctuation of average power, and, when power fluctuation being detected, from described initial coefficients memory, reading described progression operation coefficient group and described progression operation coefficient group is supplied to described coefficient update unit;
AndPower fluctuation determining unit, when the power fluctuation transmitted described in described power fluctuation detecting unit detects, described power fluctuation determining unit controls whether change coefficient by described coefficient update unit according to the amount of described power fluctuation, Wherein, when the power fluctuation transmitted described in detecting, described power fluctuation detecting unit reads the progression operation coefficient group corresponding with the described maximal power level transmitted from described initial coefficients memory, and this progression operation coefficient group is supplied to described coefficient update unit.


2. device for compensation of distortion according to claim 1, wherein, described distortion compensation unit performs distortion compensation process by each progression computing corresponding in multiple progression computings corresponding respectively to each power bracket in the described multiple power brackets transmitted
Described coefficient update unit upgrades each progression operation coefficient group being used for each progression computing, and Described initial coefficients memory is stored as each progression operation coefficient group of each progression computing of the described initial value for described coefficient update process.

3. the device for compensation of distortion any one of claim 1 to 2, wherein, described coefficient update unit updates stored in the described progression operation coefficient group in described initial coefficients memory according to coefficient update condition.

4. device for compensation of distortion according to claim 1, wherein, described power fluctuation detecting unit in time prior to by described distortion compensation unit process transmit transmit detection power fluctuate.

5. a distortion compensating method, this distortion compensating method comprises the following steps:

Distortion compensation process is performed to transmitting by progression computing; Based on export after power amplification process is carried out to the output of distortion compensation process transmit export feedback signal and described in transmit, upgrade the progression operation coefficient group for described progression computing; Initial coefficients memory is made to be stored as the progression operation coefficient group corresponding with the described maximal power level transmitted of the initial value for update process; The peak power transmitted described in detection or the power fluctuation of average power, to be set to the initial value of update process by the described progression operation coefficient group read from described initial coefficients memory when power fluctuation being detected;
AndWhen the power fluctuation transmitted described in detecting, control whether to change coefficient according to the amount of described power fluctuation, Wherein, when the power fluctuation transmitted described in detecting, from described initial coefficients memory, read the progression operation coefficient group corresponding with the described maximal power level transmitted, and this progression operation coefficient group is supplied to coefficient update unit.


6. a radio transmitting apparatus, this radio transmitting apparatus comprises:

Distortion compensation unit, it performs distortion compensation process by progression computing to transmitting; Power amplification unit, its output to described distortion compensation unit performs power amplification process; Transmitter unit, it launches the output that transmits exported from described power amplification unit; Coefficient update unit, it is based on the described feedback signal and the described progression operation coefficient group upgraded for described progression computing that transmits that export of transmitting; Initial coefficients memory, it is stored as the progression operation coefficient group corresponding with the described maximal power level transmitted of the initial value of the coefficient update process carried out for described coefficient update unit;
AndPower fluctuation detecting unit, the peak power transmitted described in its detection or the power fluctuation of average power, and, when power fluctuation being detected, from described initial coefficients memory, reading described progression operation coefficient group and described progression operation coefficient group is supplied to described coefficient update unit;
AndPower fluctuation determining unit, when the power fluctuation transmitted described in described power fluctuation detecting unit detects, described power fluctuation determining unit controls whether change coefficient by described coefficient update unit according to the amount of described power fluctuation, Wherein, when the power fluctuation transmitted described in detecting, described power fluctuation detecting unit reads the progression operation coefficient group corresponding with the described maximal power level transmitted from described initial coefficients memory, and this progression operation coefficient group is supplied to described coefficient update unit.

Specification(s)