[en] The recently installed beam position monitoring system designed for the Fermilab Booster is described. Signals from stripline pick-ups are processed by heterodyned AM-to-PM position circuitry which features wide dynamic range and normalized position outputs with wide bandwidth. Measurements are made to an accuracy of better than 1 mm over a 70 mm aperture with beam intensities ranging from less than 5E10 to more than 5E12 protons. An independent beam-synchronous timing system can track a fractional turn of beam through the cycle as the particle velocity nearly doubles. A Multibus/CAMAC data acquisition system interfaces 96 channels of closed orbit and single turn position information, and 4 channels of turn-by-turn position information, to the main control system