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US 2006/0067426 A1Published application
Multicarrier transmitter and methods for generating multicarrier communication signals with power amplifier predistortion and linearization
AssigneeIntel Corporation
InventorsAlexander Maltsev, Ali Sadri, Oleg Poldin, Alexander Maltsev
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Abstract
A multicarrier signal is generated by pre-compensating frequency-domain subcarrier symbols for substantially linear distortion subsequently introduced by a time-domain baseband filter.
Claims38
A multicarrier transmitter comprising:
- a frequency-domain predistorter to multiply complex amplitudes of a multicarrier symbol by complex coefficients;
- clipping circuitry to clip a time-domain baseband signal transformed from a frequency-domain output of the frequency-domain predistorter;
- and
- a time-domain predistorter to perform low-pass filtering on the clipped time-domain baseband signal.
1 more element
The multicarrier transmitter comprising:
- a frequency-domain predistorter to perform a substantially linear transformation on frequency-domain samples comprising a multicarrier symbol;
- clipping circuitry to perform a non-linear transformation on a time-domain baseband signal generated from linearly transformed frequency domain samples provided by the frequency-domain predistorter;
- a time-domain predistorter to perform a substantially linear transformation on a clipped time-domain baseband signal provided by the clipping circuitry;
- and
- a non-linear predistorter to perform a non-linear transformation on linearly transformed clipped time-domain signals provided by the time-domain predistorter.
2 more elements
A method for generating a multicarrier communication signal comprising:
- performing a substantially linear transformation on frequency-domain samples comprising a multicarrier symbol with a frequency-domain predistorter;
- transforming frequency domain samples provided by the frequency-domain predistorter to generate a time-domain baseband signal;
- performing a non-linear transformation on the time-domain baseband signal with clipping circuitry;
- performing a substantially linear transformation with a time-domain predistorter on a clipped time-domain baseband signal provided by the clipping circuitry;
- and
- performing a non-linear transformation with a non-linear predistorter on linearly transformed clipped time-domain signals provided by the time-domain predistorter.
3 more elements
A wireless communication device comprising:
- a substantially omnidirectional antenna;
- and
- a multicarrier transmitter to transmit a multicarrier communication signal with the antenna, wherein the multicarrier transmitter comprises:
- a frequency-domain predistorter to multiply complex amplitudes of a multicarrier symbol by complex coefficients;
- clipping circuitry to clip a time-domain baseband signal transformed from a frequency-domain output of the frequency-domain predistorter;
- and
- a time-domain predistorter to perform low-pass filtering on the clipped time-domain baseband signal.
4 more elements
A machine-readable medium that provides instructions, which when executed by one or more processors, cause the processors to perform operations comprising:
- performing a substantially linear transformation on frequency-domain samples comprising a multicarrier symbol with a frequency-domain predistorter;
- transforming frequency domain samples provided by the frequency-domain predistorter to generate a time-domain baseband signal;
- performing a non-linear transformation on the time-domain baseband signal with clipping circuitry;
- performing a substantially linear transformation with a time-domain predistorter on a clipped time-domain baseband signal provided by the clipping circuitry;
- and
- performing a non-linear transformation with a non-linear predistorter on linearly transformed clipped time-domain signals provided by the time-domain predistorter.
3 more elements
Dependencies are inferred from the claim text.