Transmitter signal shaping

摘要

A transmitter comprises at least one nonlinear circuit, and a power spectral density (PSD) shaping circuit. The PSD shaping circuit is operable to receive a symbol of a modulated signal, wherein the symbol corresponds to a first one or more frequency bins. The PSD shaping circuit is operable to perform iterative processing of the symbol, wherein each iteration of the processing comprises: generation of a pre-distortion signal based on a model of the at least one nonlinear circuit, wherein the nonlinearly distorted signal corresponds to a second one or more frequency bins; and combination of the symbol, or a pre-distorted version of the symbol, with the nonlinearly-distorted signal. The generation of the pre-distorted signal may comprise generation of a nonlinearly-distorted signal, and adjustment of one or more components of the nonlinearly-distorted signal.

主权项

1. A transmitter comprising:
at least one nonlinear circuit; and a power spectral density shaping circuit configured to:
receive a symbol of a modulated signal, wherein said symbol corresponds to a first one or more frequency bins; andperform iterative processing of said symbol, wherein each iteration of said processing comprises:
generation of a pre-distortion signal based on a model of said at least one nonlinear circuit, wherein said pre-distortion signal corresponds to a second one or more frequency bins; andcombination of said symbol, or a pre-distorted version of said symbol, with said pre-distortion signal.