Abstract:
PURPOSE: A space multiplexing transmission method and a device thereof are provided to control the transmission power for a transmission signal outputted from each amplifier to be equal. CONSTITUTION: A transmission power weight is given to each transmission signal(S510). A precoder precodes input signals to transmit a signal in a space multiplexing method through multi antenna system(S520). A precoded signals are transformed from a sequential transmission signal to a parallel transmission signal by a serial-parallel converter(S530). A transformed signal is inputted to an amplifier(S540).
Abstract:
PURPOSE: A user request information transmission apparatus through a private information channel in a digital broadcasting system, method, and system thereof are provided to effectively receive an information service through an information private transmission channel. CONSTITUTION: A receiver(200) receives broadcasting content. Information regardless of the desired broadcasting content is requested by the return channel of a mobile communication network(20) by using the receiver. The IP(Internet Protocol) address of a user terminal is requested. A transmitter(100) transmits the requested information to the receiver by changing the IP of the requested information into a packet.
Abstract:
본 발명은, 통신 시스템에서 저밀도 패리티 검사(LDPC: Low-Density Parity Check) 부호화 방식을 이용하여 데이터를 송신하는 데이터 송신 장치 및 방법에 관한 것으로, 전송하고자 하는 데이터에 적용되는 가변 부호화율 및 변조 차수를 기반으로 저밀도 패리티 검사 부호의 패리티 검사 행렬을 생성하고, 상기 가변 부호화율 및 변조 차수를 지원하도록 상기 생성한 패리티 검사 행렬에 천공(puncturing) 또는 확장(extending)을 고려하여 최적의 패리티 검사 행렬을 생성하고, 상기 최적의 패리티 검사 행렬을 통해 상기 전송하고자 하는 데이터의 정보 비트를 저밀도 패리티 검사 부호화하며, 상기 저밀도 패리티 검사 부호화된 정보 비트를 전송 우선 순위에 따라 분류한 후, 변조 심볼에 매핑하여 송신한다.
Abstract:
PURPOSE: A communication method between a base station and a terminal is provided to obtain a receiving diversity and an MRC(Maximal-Ratio Combining) effect by using a multiple input multiple output method. CONSTITUTION: Data including an error correction code is transmitted to a terminal based on the type of a base station. The type of the base station is determined by the various parameter which is used by the base station. The base station differentiates the data and the data transmission period which is determined by the type of the base station. The base station creates signal by the type of each base station and transmits the signal to a signal receiving part.
Abstract:
An apparatus and a method for equalizing the reception channel in an OFDM(Orthogonal Frequency Division Multiplexing) transmission system and a DMB(Digital Multimedia Broadcasting) receiving apparatus applying the same are provided to improve the performance of mobile reception in a transmission system in which pilot signal is not used. A channel estimator(520) estimates channel as a symbol unit with the reference signal received from the standard signal creation part(550). A channel filtering part(530) removes the noises of the presumed channel value. A channel equalization part(540) equalizes the channel by using the estimation channel value. The channel estimator estimates the PRS(Phase Reference Symbol) of the received frame by the reference signal.