Abstract: An apparatus and method for performing Fourier transformations on an input stream of digital data without switches in the cross channel communication paths. A new systolic method for performing a Fast Fourier Transform (FFT) is derived from a constant geometry method using phase shifting of data in a channel to obtain the proper data sequence, rather than switches to transfer data among channels. A standard global shuffle operator is decomposed into phase shift operators and random access memory shuffle operators that operate only in one channel. The result is further simplified by merging the phase shift operators with twiddle factors from the constant geometry method. The communications paths for the data are thereby fixed, creating the opportunity for higher radix operations than are available with devices employing switches for cross channel data transfer.

Abstract: A system for monitoring the operation of a multichannel receiver includes a channel monitor coupled to the sync separator of the receiver for collecting and transmitting channel information to a central collector station. The collector station selectively responds to one of a plurality of channel monitors to record, in sequential order, channel information. Each of the channel monitors is similar and includes a synchronizing pulse generator triggered by the vertical synchronizing pulse from a receiver to generate a match recognize pulse when a frequency coupled to the receiver from the monitor and the channel frequency have a preestablished relationship. To generate the match recognize pulse a counter provides signals to a tuning matrix that controls a frequency synthesizer or plurality of oscillators for generating the frequency coupled to the receiver for the match evaluation. Also, the counter activates a data encoder that provides channel information to the collector station.

Abstract: A system for monitoring the operation of a multichannel receiver includes a channel monitor coupled to the sync separator of the receiver for collecting and transmitting channel information to a central collector station. The collector station selectively responds to one of a plurality of channel monitors to record, in sequential order, channel information. Each of the channel monitors is similar and includes a synchronizing pulse generator triggered by the vertical synchronizing pulse from a receiver to generate a match recognize pulse when a frequency coupled to the receiver from the monitor and the channel frequency have a preestablished relationship. To generate the match recognize pulse a counter provides signals to a tuning matrix that controls a frequency synthesizer or plurality of oscillators for generating the frequency coupled to the receiver for the match evaluation. Also, the counter activates a data encoder that provides channel information to the collector station.