Method and system for power supply adjustment and polar modulation in a MIMO system

摘要

Aspects of a method and system for power supply adjustment and polar modulation in a MIMO system are provided. In each RF transmit chain of a MIMO system that utilizes polar modulation, aspects of the invention may enable generating a signal representative of an amplitude of a pair of phase-quadrature baseband signals; and controlling a voltage and/or current regulator utilizing said generated signal. In this regard, a voltage and/or current supplied to a power amplifier and/or mixer of one or more of the transmit chains may be controlled based on the generated signal. Additionally, a gain of a power amplifier for each RF transmit chain may be controlled utilizing said signal representative of an amplitude. The signal representative of an amplitude may be generated by squaring each of the phase-quadrature baseband signals and calculating a square root of a sum of the squared signals.

主权项

1. A method for signal processing, the method comprising:
in each radio frequency (RF) transmit chain of a multiple input multiple output (MIMO) system that utilizes polar modulation
generating a signal representative of an amplitude of a pair of phase-quadrature baseband signals by squaring each of said pair of phase-quadrature baseband signals and calculating a square root of a sum of said pair of squared phase-quadrature baseband signals;dividing each of said pair of phase-quadrature baseband signals by said signal representative of said amplitude;controlling a supply voltage or a supply current generated by a voltage regulator or a current regulator, said supply voltage or said supply current being linearly proportional to the square root of the sum of the pair of squared phase-quadrature baseband signals; andmodifying a 1 dB compression point of an amplifier of said RF transmit chain of said MIMO system according to the supply voltage or the supply current linearly proportional to the square root of the sum of the pair of squared phase-quadrature baseband signals.