US 11,942,948 B2
Method and apparatus for forming wideband PRN signals
Leonid Victorovich Purto, Moscow (RU); Sergey Sayarovich Bogoutdinov, Moscow (RU); and Dmitry Anatolyevich Rubtsov, Moscow (RU)
Assigned to TOPCON POSITIONING SYSTEMS, INC., Livermore, CA (US)
Appl. No. 17/758,697
Filed by TOPCON POSITIONING SYSTEMS, INC., Livermore, CA (US)
PCT Filed Oct. 8, 2021, PCT No. PCT/RU2021/000431
§ 371(c)(1), (2) Date Jul. 12, 2022,
PCT Pub. No. WO2023/059216, PCT Pub. Date Apr. 13, 2023.
Prior Publication US 2023/0283267 A1, Sep. 7, 2023
Int. Cl. H03K 3/84 (2006.01); G01S 1/04 (2006.01); G01S 7/02 (2006.01); G01S 19/03 (2010.01); G01S 19/23 (2010.01); H04B 1/713 (2011.01); H04B 15/00 (2006.01); H04L 27/02 (2006.01)
CPC H03K 3/84 (2013.01) [G01S 1/0428 (2019.08); G01S 7/023 (2013.01); G01S 19/03 (2013.01); G01S 19/235 (2013.01); H04B 1/713 (2013.01); H04B 15/00 (2013.01); H04L 27/02 (2013.01)] 18 Claims
OG exemplary drawing
 
1. An apparatus for forming pseudo-random wideband signals comprising:
(a) a set of channels each comprising a numerically controlled oscillator (NCO) having a controlled frequency and phase and a PRN code generator, the NCO configured to generate a strobe that is output to the PRN code generator, and the PRN code generator configured to form a new sequence element of +1 or −1 in response to the strobe;
(b) a first modulator comprising:
(1) a plurality of weight coefficients;
(2) a plurality of multipliers each configured to multiply one of the plurality of weight coefficients by the output of the PRN code generator;
(3) an adder configured to output a sum of the plurality of multipliers output signals; and
(4) a mixer with a quadrature output signal configured to multiply the adder's output by sine and cosine of a low intermediate frequency (low-IF);
(c) a processor configured to control the set of channels;
(d) a transceiver module configured to receive and/or transmit quadrature signals, the transceiver comprising an RF front-end and an antenna; and
(e) an interface configured to connect an output of the mixer and the transceiver module,
wherein the transceiver module is configured to transmit the quadrature signal output from the mixer converted to a radio frequency, or to add the quadrature signal to a quadrature signal received from the antenna and converted to a zero or a near-zero frequency, or replace the quadrature signal received from the antenna and converted to the zero or the near-zero frequency signal.