Apparatus using a logarithm based processor

A base station for use in a wireless communication system, the base station comprising:

• a first logarithm based processing device including at least one digital logarithm converter, the first logarithm based processing device configured to estimate a first predistortion signal using a nonlinear polynomial having a plurality of exponential terms, the first logarithm based processing device having a first output;
• a second logarithm based processing device including at least one digital logarithm converter;
• the second logarithm based processing device configured to estimate a second predistortion signal using a nonlinear polynomial having a plurality of exponential terms, the second logarithm based processing device having a second output;
• an amplifier having an input coupled to at least one of the first output of the first logarithm based processing device and the second output of the second logaritm based processing device, wherein at least one of the first predistortion signal estimated by the first logarithm based processing device and the second predistortion signal estimated by the second logarithm based processing device at least partially cancels distortion produced by the amplifier when a signal is applied thereto;
• and
• an antenna responsive to the amplifier.

A satellite system comprising:

• a first logarithm based processing device including at least one digital logarithm converter the first logarithm based processing device configured to estimate a first predistortion signal using a nonlinear polynomial having a plurality of exponential terms, the first logarithm based processing device having a first output;
• a second logarithm based processing device including at least one digital logarithm converter the second logarithm based processing device configured to estimate a second predistortion signal using a nonlinear polynomial having a plurality of exponential terms, the second logarithm based processing device having a second output;
• an amplifier to receive an input signal and to provide an amplified signal, the amplifier having an input coupled to at least one of the first output of the first logarithm based processing device and the second output of the second logaritm based processing device, wherein at least one of the first predistortion signal estimated by the first logarithm based processing device and the second predistortion signal estimated by the second logarithm based processing device at least partially cancels distortion produced by the amplifier when the input signal is amplfied by the amplifier to produce the amplified signal;
• and
• an antenna responsive to the amplifier to transmit the amplified signal.

A communication device comprising:

• a housing;
• a transmitter disposed within the housing, the transmitter including a logarithm based processor having at least one digital inverse logarithm converter;
• and
• an amplifier configured to amplify a signal having a predistortion component produced by the logarithm based processor, the predistortion component represented by a nonlinear polynomial function.