Patent ID: 7305041

Claim:
A wireless peak suppression, phase and amplitude equalizer circuit for use with multi-carrier power amplifiers in a wireless communication system to enhance the linearity and performance of the amplifier, in wireless cellular, Personal Communication System (PCS), wireless Local Area Network (LAN), line of sight microwave, military, and satellite communication systems and any other none wireless applications, the peak suppression, phase and amplitude equalizer circuit comprising: a multi-carrier receiver for the peak suppression, phase and amplitude equalization of Intermediate Frequency (IF) or Radio Frequency (RF) input signal to amplifier wherein the input signal is baseband then the multi-carrier receiver is bypassed; a digital signal processing block to reduce peak-to-average of the multi-carrier input signal using amplitude clipping and phase rotation; a digital signal processing block to use the amplitude clipped multi-carrier baseband signal to produce the phase rotation lookup table; a digital signal processing block to converts the multi-carrier baseband input signal to individual carrier baseband signals wherein individual carrier baseband signal is phase rotated before being up converted to its original multi-carrier baseband signal; a digital signal processing block to phase equalize the individual carrier baseband signal after being amplitude clipped, phase rotated and filtered; a digital signal processing block to amplitude equalize the individual carrier baseband signal after being amplitude clipped, phase rotated and filtered; a digital signal processing block to up converter the individual carriers baseband signal to their original baseband frequency after being amplitude clipped, phase rotated, filtered, phase equalized, and amplitude equalized; a digital signal processing block that clips the amplitude of the multi-carrier baseband signal by preserving the phase; a multi-carrier transmitter block that prepares the peak-to-average reduced multi-carrier signal for delivery to multi-carrier power amplifier.