Patent ID: 6366619
Filing Date: 2002-04-02
Classification: H04B,H04L

Abstract:
A constrained-envelope digital communications transmitter circuit comprising:a modulated-signal generator for generating a first modulated signal conveying to-be-communicated data, having a first bandwidth and having a first peak-to-average amplitude ratio; a constrained-envelope generator for generating a constrained bandwidth error signal in response to said first modulated signal; a combining circuit for combining said constrained bandwidth error signal with said first modulated signal to produce a second modulated signal conveying said to-be-communicated data, said second modulated signal having substantially said first bandwidth and a second peak-to-average amplitude ratio, said second peak-to-average amplitude ratio being less than said first peak-to-average amplitude ratio; and a substantially linear amplifier configured to amplify said second modulated signal.