Patent ID: 8300729
Filing Date: 2012-10-30
Classification: H04L

Abstract:
1. A baseband circuit, comprising: a baseband modulator configured to generate rectangular-coordinate in-phase (I) and quadrature phase (Q) signals from a digital message to be transmitted, in accordance with a predetermined modulation scheme; high-frequency detection and reduction means configured to detect a first sample of said digital I and Q signals that corresponds to a high-frequency event in the polar domain, modify said first sample based on both how close said first sample is to the origin of the I-Q signal plane and how fast a signal trajectory between said first sample and a subsequent sample changes, and based on a magnitude of said first sample and a magnitude of a trajectory vector define the signal trajectory between said first sample and said subsequent sample, wherein said high-frequency detection and reduction means is configured to define a pushing vector for pushing said first sample away from the origin in the I-Q signal plane, and to calculate a scaling factor for scaling said pushing vector, said scaling factor having a value dependent on the magnitude of said first sample and the magnitude of said trajectory vector, wherein said high-frequency detection and reduction means is further configured to: