Patent ID: 11942948
Assignee: TOPCON POSITIONING SYSTEMS, INC.
Field: Measurement (Instruments)
Classification: CPC H  G | IPC G  H

Claim 15:
16. A method for forming pseudo-random wideband signals, the method comprising:
controlling a frequency and a phase of a plurality of NCOs each associated with a respective one of a set of channels;
generating, by one of the plurality of NCOs, a strobe that is output to a PRN code generator;
forming, by the PRN code generator, a new sequence element of +1 or −1 in response to the strobe;
multiplying, by one of a plurality of multipliers, one of a plurality of weight coefficients by an output of the PRN code generator;
outputting, from an adder, a sum of the plurality of multiplier's output signals;
multiplying, by a mixer with a quadrature output signal, the adder's output by sine and cosine of a low intermediate frequency;
receiving quadrature signals by a transceiver module; and
transmitting quadrature signals by the transceiver module,
wherein the transceiver module transmits the quadrature signal output from the mixer converted to a radio frequency, and adds the quadrature signal to a quadrature signal received from an antenna and converted to a zero or a near-zero frequency, or replaces the quadrature signal received from the antenna and converted to the zero or the near-zero frequency signal.