Claims
- 1. An apparatus for modeling and estimating the characteristics of a power amplifier, said apparatus comprising:
a predistortion module responsive to a predistortion function and an input signal by generating a predistorted signal; the 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 and odd terms.
- 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 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 and odd terms.
- 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 the steps of:
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 including both even and odd terms.
- 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
[0001] The present patent application is related to U.S. patent application Ser. No. ______ KIM 7______, entitled, “METHOD AND APPARATUS FOR MODELING AND ESTIMATING THE CHARACTERISTICS OF A POWER AMPLIFIER WITH MEMORY”, being concurrently filed herewith and having a filing date of ______; to U.S. patent application Ser. No. ______ KIM 8-4______, entitled, “METHOD AND APPARATUS FOR CALCULATING THE PREDISTORTION FUNCTION FROM A POWER AMPLIFIER”, being concurrently filed herewith and having a filing date of ______; and to U.S. patent application Ser. No. ______ KIM 9-5______, entitled, “METHOD AND APPARATUS FOR CALCULATING THE PREDISTORTION FUNCTION FROM A POWER AMPLIFIER”, being concurrently filed herewith and having a filing date of ______; all of which have a common inventor and assignee and being incorporated herein by reference.