Claims
- 1. An apparatus for modeling and estimating the characteristics of a power amplifier, comprising:a predistortion module responsive to a predistortion function and an input signal by generating a predistorted signal; the power amplifier responsive to said predistorted signal by generating an output signal; and a polynomial module responsive to said predistorted signal and said output signal by generating coefficients of a complex polynomial of order p (p is an integer greater than one), said complex polynomial having both even order terms and odd order terms, both of said even and odd order terms being used by said polynomial module to model said power amplifier.
- 2. The apparatus according to claim 1, wherein said polynomial module employs a minimum mean squared error criteria to determine said polynomial coefficients.
- 3. A wireless radio frequency communications system including an apparatus for modeling and estimating the characteristics of a power amplifier, said system comprising:a predistortion module responsive to a predistortion function and an input signal by generating a predistorted signal; the power amplifier responsive to said predistorted signal by generating an output signal; and a polynomial module responsive to said predistorted signal and said output signal by generating coefficients of a complex polynomial of order p (p is an integer greater than one), said complex polynomial having both even order terms and odd order terms, both of said even and odd order terms being used by said polynomial module to model said power amplifier.
- 4. The system of claim 3, wherein said polynomial module employs a minimum mean squared error criteria to determine said polynomial coefficients.
- 5. A method for modeling and estimating the characteristics of a power amplifier, comprising:generating a predistorted signal in response to a predistortion function and an input signal; amplifying said predistorted signal to generate an output signal; and generating coefficients of a complex polynomial of order p (p is an integer greater than one), in response to said predistorted signal and said output signal, said complex polynomial having both even order terms and odd order terms, both of said even and odd order terms being used to model said power amplifier.
- 6. The method according to claim 5, wherein said coefficients generating step employs a minimum mean squared error criteria to determine said polynomial coefficients.
RELATED APPLICATIONS
The present patent application is related to U.S. patent application Ser. No. 09/876,772, entitled, “METHOD AND APPARATUS FOR MODELING AND ESTIMATING THE CHARACTERISTICS OF A POWER AMPLIFIER”, being concurrently filed herewith and having a filing date of Jun. 7, 2001; to U.S. patent application Ser. No. 09/878,037, entitled, “METHOD AND APPARATUS FOR CALCULATING THE PREDISTORTION FUNCTION FROM A POWER AMPLIFIER”, being concurrently filed herewith and having a filing date of Jun. 8, 2001; and to U.S. patent application Ser. No. 09/878,038, entitled, “METHOD AND APPARATUS FOR CALCULATING THE PREDISTORTION FUNCTION FROM A POWER AMPLIFIER”, being concurrently filed herewith and having a filing date of Jun. 8, 2001; all of which have a common inventor and assignee and being incorporated herein by reference.
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