Abstract: A microwave circuit and housing in which the housing cavity is reduced in size by providing threaded slots in side walls of the housing which receive tabs extending from the microwave circuit carriers. Pillars are inserted in the slots for maintaining the carriers in position on the bottom surface of the housing and for filling the slots. Reduced weight, height, and width is achieved with a reduced number of piece parts.

Abstract: Improved fidelity and reduced computational requirements are achieved in a linear predictive coding (LPC) system that utilizes multichannel signal processing and reduced sampling rates. The input analog signal is divided by filters into multiple, contiguous, substantially equal bandwidth signal components and each component is digitized and processed by a separate standard LPC transmit-receive system. Each transmit-receive system operates at a sampling rate that is equal to the normal sampling rate for the signal being processed divided by the number of channels or signal components used. The received signal components are filtered, converted to analog, and summed.