摘要:
The code generation apparatus includes: a clock generation unit (160) which generates a clock signal of a first frequency; a timing control unit (130) which generates a timing signal of a second frequency lower than the first frequency; a code table storage unit (120) in which a plurality of code sequences serving as a source for a pseudo-noise code is stored; an address control unit (110) which selects, according to the timing signal, a code sequence to be read, from among a plurality of code sequences; a partial code sequence extraction unit (140) which extracts, as a partial code sequence, a code of a predetermined length, from the code sequence to be read; and a parallel-series conversion unit (150) which outputs the partial code sequence by one bit at a time, according to the clock signal.
摘要:
The spread spectrum radar apparatus in the present invention (i) includes: a transmission code generator (110); a reception code generator (121) generating a reception code obtained by delaying a transmission code; a spread modulator (112) spread-modulating a signal generated by a local oscillator (111) using the transmission code; a transmission antenna (113) transmitting the spread-modulated signal; a reception antenna (120) receiving a signal; a spread demodulator (122) demodulating the signal using the reception code to provide a correlation signal; a mixer (123) mixing the correlation signal and the signal generated by the local oscillator (111) to generate a radar signal; a virtual image determining unit (130) determining a virtual image; and a radar signal calculation device (160) calculating the radar signal using a virtual image determination signal, and (ii) adds a calculation and an offset signal for suppressing a peak intensity of the virtual image when the virtual image occurs.
摘要:
The spread spectrum radar apparatus in the present invention (i) includes: a transmission code generator (110); a reception code generator (121) generating a reception code obtained by delaying a transmission code; a spread modulator (112) spread-modulating a signal generated by a local oscillator (111) using the transmission code; a transmission antenna (113) transmitting the spread-modulated signal; a reception antenna (120) receiving a signal; a spread demodulator (122) demodulating the signal using the reception code to provide a correlation signal; a mixer (123) mixing the correlation signal and the signal generated by the local oscillator (111) to generate a radar signal; a virtual image determining unit (130) determining a virtual image; and a radar signal calculation device (160) calculating the radar signal using a virtual image determination signal, and (ii) adds a calculation and an offset signal for suppressing a peak intensity of the virtual image when the virtual image occurs.
摘要:
The code generation apparatus includes: a clock generator which generates a clock signal of a first frequency; a timing controller which generates a timing signal of a second frequency lower than the first frequency; a code table storage in which a plurality of code sequences serving as a source for a pseudo-noise code is stored; an address controller which selects, according to the timing signal, a code sequence to be read, from among a plurality of code sequences; a partial code sequence extractor which extracts, as a partial code sequence, a code of a predetermined length, from the code sequence to be read; and a parallel-series convertor which outputs the partial code sequence one bit at a time, according to the clock signal.
摘要:
A shape measurement instrument includes a plurality of transmitters 1 to 4 which radiate signals having different waveforms or phases, receivers 31 to 34 which receive signals reflected from an object O, correlation units 41 to 44 which obtain correlation waveforms between waveforms of the signals received by the receivers 31 to 34, and the signal radiated by a transmitter radiating the received signal of the transmitters 1 to 4, and a shape estimation unit 5 which extracts a quasi-wavefront based on the correlation waveforms obtained by the correlation units 41 to 44 and estimates a shape of the object O based on a relationship between the quasi-wavefront and the object O. As a result, a period of time required to measure an object shape can be significantly reduced.
摘要:
A semiconductor chip such as an MMIC is provided. The semiconductor chip has: a Si semiconductor as a substrate; and a low-loss transmission line, and can be easily connected to a circuit board on which the semiconductor chip is to be mounted and can ensure a stable GND potential. The semiconductor chip is a flip-chip semiconductor chip, and includes: a Si substrate; an integrated circuit manufactured on a main surface of the substrate; a dielectric film formed above the integrated circuit; and a conductor film for grounding formed on an upper surface of the dielectric film. The integrated circuit includes a wiring layer including a signal line which transmits signals for the integrated circuit. The signal line, the dielectric film, and the conductor film constitute a microstrip line.
摘要:
A semiconductor integrated circuit device with a balun which is formed above a conductive semiconductor substrate and which includes a dielectric film, an unbalanced line for transmitting an unbalanced signal, and balanced lines for transmitting a balanced signal. The unbalanced line is placed opposite to the balanced lines via a nano-composite film that is a region of the dielectric film. The nano-composite film, interposed between the unbalanced line and the balanced lines, has a relative permittivity higher than that of other regions of the dielectric film. This allows suppression of electromagnetic coupling of transmission lines or passive elements other than the balun, thereby providing a semiconductor device with a wide-band and small-size balun.
摘要:
A semiconductor integrated circuit device with a balun which is formed above a conductive semiconductor substrate and which includes a dielectric film, an unbalanced line for transmitting an unbalanced signal, and balanced lines for transmitting a balanced signal. The unbalanced line is placed opposite to the balanced lines via a nano-composite film that is a region of the dielectric film. The nano-composite film, interposed between the unbalanced line and the balanced lines, has a relative permittivity higher than that of other regions of the dielectric film. This allows suppression of electromagnetic coupling of transmission lines or passive elements other than the balun, thereby providing a semiconductor device with a wide-band and small-size balun.
摘要:
The range finder includes a transmitting unit (71) which emits a transmitted wave (75) spread using a spread code at a constant chip rate, a receiving unit (72) which receives a reflected wave (76), a correlation unit (73) which calculates a correlation waveform indicating delay time and a correlation between the transmitted wave (75) and the reflected wave (76), and a distance calculation unit (74) which calculates, from a peak position in the waveform, a distance to the object. The correlation unit (73) calculates the correlation waveform obtained when changing the delay time for each range gate. The distance calculation unit (74) calculates the distance to the object by calculating, at a resolution finer than the range gate, a delay time corresponding to the peak in the correlation wave using a highest-correlation point and an adjacent higher-correlation point in the wave form.
摘要:
A shape measurement instrument includes a plurality of transmitters 1 to 4 which radiate signals having different waveforms or phases, receivers 31 to 34 which receive signals reflected from an object O, correlation units 41 to 44 which obtain correlation waveforms between waveforms of the signals received by the receivers 31 to 34, and the signal radiated by a transmitter radiating the received signal of the transmitters 1 to 4, and a shape estimation unit 5 which extracts a quasi-wavefront based on the correlation waveforms obtained by the correlation units 41 to 44 and estimates a shape of the object O based on a relationship between the quasi-wavefront and the object O. As a result, a period of time required to measure an object shape can be significantly reduced.