Communication system with papr management using noise-bearing subcarriers

Abstract

A communication system () includes a base station () and a number of peak-managed user equipment apparatuses () that simultaneously transmit peak-reduced FDMA communication signals () to the base station (). The communication system () exclusively assigns payload subcarriers () to the apparatuses () and assigns a few noise-bearing subcarriers () for common simultaneous use by all apparatuses (). Each user equipment apparatus () includes a peak reduction section () that distorts an otherwise undistorted modulated communication signal () into a distorted, peak-reduced communication signal () by generating and adding peak-reduction noise () to the undistorted signal (). The peak-reduction noise () is primarily mapped onto the noise-bearing subcarriers () without conforming to an in-band noise constraint and may be mapped onto the assigned payload subcarriers () to the extent permitted by an in-band noise constraint. The peak-reduction noise () is blocked in unassigned payload subcarriers ().