Abstract: A programmable digital correlator device, and associated correlation method, with a very efficient structure. In one aspect, two or more correlators share a common data sequence shift register. In another aspect, the data sequence shift register is comprised of random access memory (RAM) modules which allow efficient construction in field programmable gate array (FPGA) logic devices. Two's-complement data samples are multiplied by a reference sequence to produce unfinished two's-complement products, the products are summed with unsigned arithmetic in an adder containing population counters, and a correction factor is added after all other calculations are complete to convert the unsigned result back to a two's-complement number.

Abstract: A method is shown for providing stable communication between a hub earth-station and a VSAT earth-station by regulating the power of signals transmitted via a satellite. In this method, the hub receives a beacon signal from the satellite and a previous outbound signal. The hub then regulates the power of an outbound signal transmitted by the hub to VSAT via the satellite, based on either the beacon signal or the previous outbound signal. The hub then sends a current outbound signal, including signal data and parameter data to the VSAT via the satellite. The VSAT receives the current outbound signal and determines a number of signal properties pertaining to the current outbound signal. The VSAT then regulates the power of an inbound signal transmitted by the VSAT to the hub via the satellite, based on the signal properties, the parameter data, and a set of reference data.

Abstract: A programmable digital correlator device, and associated correlation method, with a very efficient structure. In one aspect, two or more correlators share a common data sequence shift register. In another aspect, the data sequence shift register is comprised of random access memory (RAM) modules which allow efficient construction in field programmable gate array (FPGA) logic devices. Two's-complement data samples are multiplied by a reference sequence to produce unfinished two's-complement products, the products are summed with unsigned arithmetic in an adder containing population counters, and a correction factor is added after all other calculations are complete to convert the unsigned result back to a two's-complement number.