Abstract:
PURPOSE: A method for transmitting/receiving a broadcast signal in a digital broadcasting system and a device thereof are provided to efficiently transmit additional data while the device maintains compatibility with an existing digital broadcasting system. CONSTITUTION: A main signal generating unit(802) generates a main signal using main data. First to N additional signal generating units(804,806) generate an additional signal with lower power than the main signal using additional data. An additional signal frame generating unit(812) uses an additional signal frame using the additional signal and a frame header. A broadcast signal generating unit(814) generates the broadcast signal using the main signal and the additional signal frame.
Abstract:
PURPOSE: A broadcasting data transmission system is provided to improve data transmission performance in a fading channel by decoding a data stream. CONSTITUTION: A broadcasting data transmission apparatus controls the transmission power of a data stream according to a modulation method about each transmission antenna(310). The broadcasting data transmission apparatus previously codes the data stream controlled by the transmission power using a pre-coding matrix according to the modulation method(320). The broadcasting data transmission apparatus transmits the coded data stream to a reception unit using the transmission antenna(330).
Abstract:
PURPOSE: A channel analysis equipment and A method thereof, which is using a transmitter identification signal are provided to accurately analyze the property of the received signal, even if the synchronization error is existed. CONSTITUTION: A reference signal creation part(503) creates the reference signal. A correlator(505) calculates the correlation value in correlation with the received signal and the reference signal. A interpolator(507) interpolates the calculated correlation value. A analysis section(509) analyzes the received signal by using the interpolated correlation value. The correlator processes the discrete correlation for the received signal and the reference signal.
Abstract:
PURPOSE: An apparatus and a method for controlling an infrastructure are provided to control remote control objects which are located in a wire region using a simple receiver. CONSTITUTION: A broadcasting contents modulator(302) modulates broadcasting contents(301) into a pre-set mode. A signal generator(303) generates information signal for controlling the remote control of an infrastructure. An adding unit(304) combines the modulated broadcasting contents and the information signal. A digital TV(DTV) signal transmitter(305) converts the added signal to DTV broadcasting signal. The DTV signal transmitter transmits the converted DTV broadcasting signal.
Abstract:
A repeater, a signal processing method thereof and a frequency converting method are provided to minimize the frequency error between repeater transmitting signals by self-offsetting the frequency error of a local oscillator. A frequency generator(230) generates a frequency for an intermediate frequency conversion and a frequency for frequency up-conversion. A down-converter(240) converts the first wireless frequency of a received signal into the first intermediate frequency. A digital signal processor(250) produces an intermediate offset frequency for offsetting a local oscillating frequency error from the frequency offset of the received signal. An up-converter(260) converts the second intermediate frequency into the second wireless frequency.
Abstract:
A transmission method of a digital broadcasting signal, a transmitting device, a receiving method and a receiving device are provided to separate a stream into a plurality of layers according to characteristics of the streams and to allocate frequency dynamically based on processed signal after individually processing each layer. A single stream separates a plurality of layers according to the property of stream(130). The coding and mapping about the discrete layer are executed(150). The frequency about the discrete layer based on the number of symbols about the discrete layer is dynamically assigned(160).
Abstract:
1. 청구범위에 기재된 발명이 속한 기술분야 본 발명은 무선통신 시스템에서의 선형 또는 비선형 평균을 이용한 채널 추정 장치 및 그 방법에 관한 것임. 2. 발명이 해결하려고 하는 기술적 과제 본 발명은 파일럿 신호가 삽입되어 전송된 OFDM 신호로부터 송신기와 수신기 간의 전송로에 의해 야기된 채널을 추정하고, 추정된 채널에 존재하는 잡음성분과 깊은 널(null)에 의한 잡음 증폭현상으로 인한 등화기(equalizer) 성능 열화를 감소시키기 위해 추정된 채널을 선형 또는 비선형 평균하는, 채널 추정 장치 및 그 방법을 제공하는데 그 목적이 있음. 3. 발명의 해결방법의 요지 본 발명은, 무선통신 시스템에서의 채널 추정 장치에 있어서, 파일럿 신호가 삽입되어 전송된 반송파 신호로부터 송신기와 수신기 간의 전송로(channel)에 의해 야기된 채널을 파일럿 신호의 배열 형식에 따라 추정하여 채널계수를 추정하기 위한 채널 추정 수단; 및 상기 추정된 채널계수를 선형 또는 비선형 평균하여 채널에 존재하는 잡음성분과 깊은 널에 의한 잡음 증폭현상으로 인한 등화기 성능 열화를 감소시키기 위한 선형 또는 비선형 평균 수단을 포함함. 4. 발명의 중요한 용도 본 발명은 무선통신 시스템 등에 이용됨. OFDM, 선형 또는 비선형 평균, 채널 추정, 가중이동평균, 단순이동평균
Abstract:
An apparatus and a method of servicing digital multimedia broadcasting are provided to transmit the multimedia data and additional data of high quality and high transmitting efficiency. An apparatus of servicing digital multimedia broadcasting includes a base layer transmitting processor(307), an enhancement layer transmitting processor(305), and a layer transmitting unit. The base layer transmitting processor encodes the base layer stream. The enhancement layer transmitting processor encodes the enhancement layer stream. The layer transmitting unit encodes the base layer stream which is output from the base layer transmitting processor and the enhancement layer stream which is output from the enhancement layer transmitting processor and allots a predetermined bit value so as to proceed a layer symbol mapping to transmit it.
Abstract:
A backward data transmitting method using a data transmission network in a broadcasting system and a backward data transmission managing method are provided to construct a data transmission network between terminals, thereby increasing the channel amount without a separate relay device. When direct transmission from a terminal to a base station fails, the terminal broadcasts the data packet to the base station or adjacent other terminals. When the adjacent terminal receives the broadcasted data packet(411), the terminal confirms the ID of the received data packet and discriminates whether the received data packet is the packet successively transmitted to the base station(412). When the received data packet is the packet previously transmitted to the base station, the received transmission data packet is discarded(413) and the adjacent terminal waits for the new transmission data packet. When the received data packet is not transmitted to the base station, the adjacent terminal broadcasts the received data packet to the base station or the adjacent other terminals(414).