Abstract:
본 발명은 무선 송수신 시스템 및 그 송수신 방법에 관한 것이다. 본 발명은 송신하고자 하는 입력 비트 시퀀스를 N개의 부시퀀스들로 변환하는 신호 변환부, 각각의 부시퀀스들에 해당 채널의 채널화 코드를 부여하여 채널링하는 채널화부, 채널링된 각각의 부시퀀스에 대하여 송신빔 형성을 가중치를 부여하여 송신 빔 형성기, 상기 가중치가 부여된 각 채널의 신호들을 전송하는 N개의 송신 안테나를 포함하는 송신 장치; 및 상기 각 송신 안테나로부터 송신되는 신호를 수신하는 M 개의 수신 안테나, 각각의 수신 안테나에서 출력되는 신호들에 대하여 수신 빔 형성을 위한 가중치를 부여하는 수신 빔 형성기, 각각의 가중치가 부여된 신호를 역채널링하여 원래의 신호인 부시퀀스를 복원하는 역채널화부, 복원된 각 채널의 부시퀀스를 결합하여 입력 비트 시퀀스로 출력하는 신호 변환부를 포함하는 수신 장치를 포함한다. 이러한 본 발명에 따르면, 다수의 송수신 안테나를 포함하는 무선 송수신 시스템에서 고전송율을 확보함과 동시에 송수신단에서 채널간 상관성을 제거함으로써 최대 공간 다이버시티 이득을 확보할 수 있다.
Abstract:
PURPOSE: A kernel back door detection system and method, and a kernel data recovering method are provided to detect a vicious kernel back door like a Linux kernel back door, and to recover the data, changed by the vicious kernel back door, into normal data. CONSTITUTION: The system comprises a kernel module manager(110), an allowance kernel module manager(210), an allowance kernel module database(220), and a kernel module loading manager(230). The kernel module manager(110), positioned at a user area, embeds a kernel module management program for adding, deleting or searching a list of an allowance kernel module. The allowance kernel module manager(210) manages the list of the allowance kernel module which the kernel module manager requests to be registered. The allowance kernel module database(220) stores the list of the allowance kernel module allowed to be registered by the allowance kernel module manager(110). The kernel module manager(230) loads the kernel modules, which the user area requests to be loaded, at a kernel area based on the list of the allowance kernel module.
Abstract:
PURPOSE: A kernel back door detection system and method, and a kernel data recovering method are provided to detect a vicious kernel back door like a Linux kernel back door, and to recover the data, changed by the vicious kernel back door, into normal data. CONSTITUTION: The system comprises a kernel module manager(110), an allowance kernel module manager(210), an allowance kernel module database(220), and a kernel module loading manager(230). The kernel module manager(110), positioned at a user area, embeds a kernel module management program for adding, deleting or searching a list of an allowance kernel module. The allowance kernel module manager(210) manages the list of the allowance kernel module which the kernel module manager requests to be registered. The allowance kernel module database(220) stores the list of the allowance kernel module allowed to be registered by the allowance kernel module manager(110). The kernel module manager(230) loads the kernel modules, which the user area requests to be loaded, at a kernel area based on the list of the allowance kernel module.
Abstract:
PURPOSE: A radio transmitting/receiving system and a radio transmitting/receiving method are provided to obtain a maximum space diversity gain by ensuring a high transmission ratio and removing correlation between channels. CONSTITUTION: A radio transmitting/receiving system comprises a transmitting unit(10) and a receiving unit(20). The transmitting unit includes a signal converter(11) for converting an input bit sequence into N-number of sub sequences; a channeling unit(13) for channeling the sub sequences by providing channeling codes to each of sub sequences; a transmitting beam forming unit(14) for providing weight values for formation of transmitting beam to the channeled sub sequences; and N-number of transmitting antennas(15) for transmitting signals of the channels provided with the weight values. The receiving unit includes M-number of receiving antennas(21) for receiving the signals transmitted from the transmitting antennas; a receiving beam forming unit(22) for providing weight values for formation of receiving beam to the signals output from the receiving antennas; an inverse channeling unit(23) for restoring sub sequences by inversely channeling the signals provided with the weight values; and a signal converter(26) for coupling the restored sub sequences and outputting an input bit sequence.