Topcon Positioning Systems, Inc.

Topcon Gps, LLC

Igor Anatolyevich Orlovsky

Andrey Vladimirovich Veitsel

Dmitry Anatolyevich Rubtsov

Victor Andreevich Prasolov

Sergey Sayarovich Bogoutdinov

Mark Isaakovich Zhodzishsky

Victor Abramovich Veitsel

Alexey Vladislavovich Zhdanov

Dmitry D Murzinov

Alexander Kirsanov

Evgeny N Sidorov

Pavel V Kalmykov

Digital anti-jam apparatus includes a CPU; N spectrum analysis and band rejection (SABR) modules, each receiving a digital quadrature signal input, outputting a spectral data output, and outputting a quadrature output with interference band rejected; the CPU first places the SABR modules into a spectral analysis (SA) mode, and upon detection of interference, places the SABR modules into a band rejection (BR) mode while the interference continues; N N-to-1 multiplexers, whose quadrature outputs are connected to corresponding SABR modules, wherein the CPU controls whether to connect an input of each multiplexer either to the quadrature signal input or to the quadrature band-reject output of any other SABR module; a (N+1)-to-1 multiplexer, connected to the quadrature signal input or to the quadrature output of any SABR module; and a frequency conversion module, that receives output of the (N+1)-to-1 multiplexer and shifts a spectrum of the digital quadrature signal input.

Digital reconfigurable apparatus for spectrum analysis and intreference rejection

A universal multi-channel receiver for receiving and processing signals from different navigation systems is provided. The universal receiver is implemented as an ASIC receiver with a number of universal channels. The receiver with universal channels is capable of receiving and processing signals from navigation satellites located within a direct access zone. The universal receiver has a plurality of channels that share the same memory. The universal receiver can determine its coordinates using any of the existing navigation systems (GPS, GLONASS, Beidou and GALILEO). The receiver can receive and process any (PN) signals.

Universal multi-channel GNSS signal receiver

A method for receiving and processing satellite navigation signals includes receiving the navigation signals; converting the navigation signals into digital signals; providing a clock signal to all channels that process the digital signals; generating frequency division signals; selecting a channel frequency division signal from the frequency division signals based on which ADC is used to convert the satellite navigation signals into digital signals; connecting the channel to the ADC; generating code frequency signal and base carrier frequency signal using a net accumulation signal; processing the digital signal in the channel to produce digital quadrature signal components of the digital signal based on the code frequency signal and the base carrier frequency signal; using a tick signal that represents 2&#xd7;clock signal as a temporary time scale for control of the channels for determining digital signal phase differences between the channels; and outputting coordinates based on the quadrature components.

Methods and receivers for processing GNSS signals

System for digital sweep type spectrum analysis with up/down frequency provides measurements of frequency spectrum of complex analog baseband input signal. The signal is quantized into three levels with fs based on the bandwidth of the input signal. Four multiplexers, a first block of registers and a block of adders perform operations equivalent to complex multiplication of the quadrature components. Two complex signals with up and down shifted spectrum are produced by the adders. The quadrature components are inputted to the accumulators with reset, which act as low-pass filters and accumulate several samples at a constant frequency fof the local oscillator. Levels of two accumulated complex samples are estimates of input signal spectrum in two frequency points +fand &#x2212;f. A sweep controller changes a frequency of the local oscillator from zero up to fs/2. Estimates of the input signal spectrum are generated sequentially in range &#x2212;fs/2 to +fs/2.

Digital sweep type spectrum analyzer with up/down frequency conversion

Disclosed is a system and method for processing signals received from different global navigation satellite systems. The receiver includes a number of universal digital channels. The universal digital channel can be used to receive and process different code signals of each of the three navigation satellite systems GPS, GLONASS, and GALILEO. The universal digital channels have the same structure. Each of them can be tuned to receive different signals. The core of the universal digital channel is a code generator and a universal strobe generator.

Growing community of inventors

Moscow, Russia

Igor Anatolyevich Orlovsky