Abstract:
1. 청구범위에 기재된 발명이 속하는 기술분야 본 발명은 송수신기에서 순방향 제거 기법을 이용한 수신 간섭신호 및 송신 누설전력신호 제거 장치에 관한 것임. 2. 발명이 해결하려고 하는 기술적 과제 본 발명은 수신기의 정상 동작을 방해함으로써 수신 감도를 악화시킬 수 있는 성분들인 인접 대역의 수신 간섭신호나, 송신 동작시 수신 경로로 누설되는 송신 신호를, 두개의 방향성 결합기를 이용하여 수신 간섭신호 및 송신 누설전력을 각각 샘플링한 후 위상 변위기, 가변 이득 증폭기 및 지연기 등을 이용하여 이러한 신호들과 크기가 같고 위상이 역상인 신호를 생성함으로써, 수신 간섭신호나 송신 누설전력을 제거할 수 있게 하는, 송수신기에서 순방향 제거 기법을 이용한 수신 간섭신호 및 송신 누설전력신호 제거 장치를 제공하는데 그 목적이 있음. 3. 발명의 해결 방법의 요지 본 발명은, 송신부, 수신부, 송수신 분리부를 포함하여 이루어지는 무선주파수(RF) 송수신기에서의 수신 간섭신호 제거 장치에 있어서, 수신안테나를 통하여 수신부로 유입되는 수신신호를 분기하기 위한 결합 수단; 상기 결합 수단에 의하여 분기된 수신신호의 위상과 크기를 조절하여 역위상 간섭신호를 생성하기 위한 역위상 간섭신호 생성 수단; 상기 수신부에 의하여 저잡음 증폭되고, 소정의 주파수 대역으로 선택된 상기 수신신호를 시간지연시키기 위한 지연 수단; 및 상기 역위상 간섭신호 생성 수단에 의하여 생성된 역위상 간섭신호와 상기 지연 수단에 의하여 시간지연된 수신신호를 감산하여, 상기 수신신호에 포함된 간섭신호를 제거하기 위한 빼기 수단을 포함함. 4. 발명의 중요한 용도 본 발명은 송수신장치에서의 수신간섭신호/송신누설전력 제거 등에 이용됨.
Abstract:
PURPOSE: A method for integrally setting a Linux kernel and an application software package, and generating a file list based on the CML2(Configuration Menu Language) is provided to integrally set the application programs and the Linux kernel, and generate a list of the files installed to an object system by adding the file list to an option information file of the application program. CONSTITUTION: The option information file for each application program is made and an attribute fit to each option is assigned after recording the list of the available setting options(S10). The option information file of each application package is stored by being converted into a CML2 file. During a conversion process, each option is added to a 'symbols', 'menus', and 'menu' dependent section of the CML2 file. If the option has dependency, the dependency of the option is added in the CML2 file. The file list of each option is stored in a file list table(S11). An integrated rule file is stored by integrating the CML2 files of the application packages and the Linux kernel(S12). The list of the files installed to the object system is generated by a setting result of a user(S15).
Abstract:
PURPOSE: A printing type multi-band antenna is provided to generate two resonant frequencies and reduce an existing resonant frequency by forming two additional lines to an end part of an inverse F antenna. CONSTITUTION: A printing type multi-band antenna includes a plurality of first radiation elements and a plurality of second radiation elements. The first radiation elements(300,301,302,303) are arranged on an upper surface of a dielectric substrate(309). The first radiation elements have a shape of inverse F, respectively. The second radiation elements(306,307) are arranged on one side of the first radiation elements of the upper surface of the dielectric substrate. The second radiation elements have a shape of inverse L, respectively. The first and the second radiation elements are partially located at a top part of a ground part(308). A first and a second sub-radiation element are formed at each end part of the second radiation elements.
Abstract:
The noise figure balancing automatic measurement system of a mobile communication's receiver comprises: a controller (200) controlling a variable attenuator through a high frequency choke (202); the high frequency choke (202) providing DC voltage to the variable attenuator by a control, of the controller (200); a down converter (203) comprised of the variable attenuator (207), a mixer #1(208), a mixer #2(209), a local oscillator #1(210), a local oscillator #2(211) and an EEPROM storing a value of attenuated amount in the variable attenuator (207) corresponding to a control voltage from the high frequency choke (202), converting a frequency of signals to be input in the reception pre-terminal to produce an intermediate frequency, and then outputting this signal to a spectrum analyzer (206); the spectrum analyzer (206) for measuring a noise figure of an output signal in the downconverter (203) to record it; the signal generator (205) generating a reference signal to input it to the reception pre-terminal (205); a general purpose interface bus (201) interfacing the spectrum analyzer (206) with the controller (200); and the reception pre-terminal (205) comprised of a low noise amplifier of a band-pass filter.
Abstract:
The present invention relates to a method for frequency sharing of a high frequency ocean surface radar, which assigns two signal waveforms orthogonal to each other to the same frequency band so as to reuse the frequency, and an embodiment of the present invention is as follows. Two radars can be operated without interfering each other in the same frequency band by assigning an up-chirped linear frequency modulation (LFM) waveform signal and a down-chirped LFM waveform signal of the same frequency band to the two frequency ocean surface radar, respectively, using the characteristics of the two waveform signals orthogonal to each other. In addition, multiple radars located within the distance possible to be interrupted can be operated without interfering with each other by combining and assigning multiple frequency bands and the two orthogonal signals to the radars. Because the frequency reuse technique of the present invention continuously uses chirped LFM signals without time division, continuous real-time observation over a large region is possible and thereby the accuracy of obtained information on an ocean surface is raised. Efficient frequency reuse is achieved by combining two LFM signal waveforms, which have a characteristic of being orthogonal to each other, with multiple frequency bands.