Abstract: A complex adaptive Finite-Impulse-Response filter for processing complex digital data having real and imaginary data portions that includes a first data path for receiving and processing the real data portion of the complex input and a second data path for receiving and processing the imaginary data portion. Each first and second data path includes a corresponding plurality of adaptive weight circuits and accumulator circuits to perform respectively, multiplications of input data with a set of updatable coefficient data and accumulations of the multiplication results obtained. Two of multiplication results are obtained for each data path and a subset from each are accumulated to form a real output portion and imaginary output potion for the filter. A time delay circuit is provided to allow for proper time multiplexing of the imaginary output portion. The plurality of adaptive weight circuits have associated therewith first and secondary memory storage banks for storing the current coefficient data values.

Abstract: An electronic blanking system having a plurality of inputs from a number of radio frequency transmitters and a plurality of outputs for supplying blanking pulses to receivers which are in proximity to the transmitters includes input circuitry for processing input pulses from the inputs to produce processed input signals. Timers alter the timing of the processed input signals as required to produce the needed blanking pulses. Matrix means are provided for routing each blanking pulse to the outputs. A processor controls each matrix to determine the routing. Output drivers supply the blanking pulses, at predetermined voltage levels, to the outputs. The processor also controls the timers to determine the manner in which the timing is altered. The timers includes at least one of a delay for delaying the processed input signals, a stretching circuit for increasing the length of the processed input signals, and a truncator for truncating the length of the processed input signals.