Abstract:
본 발명은 수신 단말이 주변 단말들이 사용하던 물리 상향 링크 공용 채널(Physical uplink shared channel; PUSCH) 내 신호를 오버히어링(overhearing)하여 리소스 블록(Resource Block; RB) 내 슬롯 단위로 평균 수신 전력을 측정하는 채널 정보 획득 방법을 제공함으로써, 레퍼런스 신호를 활용하여 채널 정보를 측정하지 않아 레퍼런스 신호 검출에 요구되는 레퍼런스 신호 관련 정보량 및 검출을 위한 연산 복잡도가 증가하지 않는 단말 간 통신 수행 방법 및 장치를 제공한다.
Abstract:
PURPOSE: A modulation method for a medical in-body wireless body area network (WBAN) system, an apparatus thereof, a demodulation method, and an apparatus thereof are provided to reduce a signal to noise Ratio (SNR) loss which is shown in group pulse position modulation (GPPM) by grouping a Manchester code based on the grouping of the GPPM. CONSTITUTION: A symbol mapping unit (1610) comprises a Hamming distance determining unit and an arrangement unit. The symbol mapping unit produces a symbol mixture by grouping a Manchester code. The symbol mapping unit maps information which is wanted to transmit with the symbol mixture. A transmission unit (1630) transmits the symbol mixture which is mapped to a demodulation apparatus. The symbol mapping unit maps the information with the symbol mixture based on a gray code. [Reference numerals] (1610) Symbol mapping unit; (1630) Transmission unit
Abstract:
PURPOSE: An offset phase rotation shift keying(OPRSK) modulation apparatus and a method, a phase silence rotation shift keying(PSRSK) modulation apparatus and a method, a phase silence rotation shift keying demodulation apparatus and a method are provided to reduce a nonlinear distortion in an environment in which the nonlinear distortion exists by applying a power dissipation and a phase offset of a symbol section at the same time, based on a modulation method of high power efficiency, for a low power WBAN system. CONSTITUTION: An offset phase rotation shift keying modulation apparatus comprises a symbol generating unit(610) generating a symbol having a phase offset of 45° by a constellation shaft of a first effective symbol section located in a front part and a constellation shaft of a second effective symbol section located in a rear part when performing a modulation positioning a signal waveform in the front part or the rear part among the total section of the symbol based on the three inputted bit information, and a transmission unit(620) transmitting the generated symbol. . [Reference numerals] (610) Symbol generating unit; (620) Transmission unit; (AA) 3 input bits; (BB) Transmission signal
Abstract:
PURPOSE: A circulation delaying diversity based power allocation apparatus is provided to solve an SNR(Signal to Noise Raito) loss problem of a reception end unit by using fading effects in SISO-OFDM(Single-Input Single-Output Orthogonal Frequency Division Multiplexing) based wireless communication environment. CONSTITUTION: A circulation shift register(310) creates a copy of a transmission signal. The circulation shift register respectively applies sample delay values of other values according to M-paths in order to skip a parallel processing step. The number of the circulation shift register is formed the same as the number of the route. The route generates a signal corresponding to a circulation delaying step. A sample adder(330) constitutes one transmission signal by adding the transmission signal to the divided transmission signal.
Abstract:
PURPOSE: An OTDOA estimation device in a mobile communication system and a method thereof are provided to offer an overlay cell ID environment in synchronous network and an exact OTDOA estimation in asynchronous network when muting is not supported. CONSTITUTION: When a received signal is a synchronous network signal, a cycle correlation unit estimate a CIR(Channel Impulse Response)(1203,1205) A serving PRS(Positioning Reference Signal) removing unit removes a PRS of a serving cell from the estimated CIR(1207). A threshold value controlling unit sets a threshold value for a inter cell transmitting reference time(1209). A path detecting unit detects the first path by using the final CIR and the threshold value. The path detecting unit estimates OTDOA(1211).
Abstract:
본 발명은 OFDM 시스템의 샘플링 주파수 동기 장치에 관한 것으로, OFDM 수신기의 FFT 처리된 주파수영역의 수신신호에 포함된 잡음을 제거하는 적응적 잡음 제거 필터; 상기 적응적 잡음 제거 필터로부터의 수신신호중 인접하는 두 수신신호간의 분산 파일럿을 제1 공액 복소곱 연산하고, 상기 제1 차 복소곱 연산에 의해 생성되는 신호들중 연속되는 두 신호를 제2 공액 복소곱 연산하여 공액 복소 연산값을 생성하는 공액 복소 곱셈부; 상기 공액 복소 곱셈부로부터의 공액 복소 연산값의 분산값(Var)에 따른 가중치를 상기 공액 복소 연산값에 적용하여 샘플링 주파수 옵셋 추정값을 생성하는 가중치 연산부; 상기 가중치 연산부로부터의 샘플링 주파수 옵셋 추정값에 따라 샘플링 주파수를 생성하는 샘플링 주파수 생성부; 및 상기 샘플링주파수생성부로부터의 샘플링 주파수에 따라, 수신신호를 샘플링하여 디지털 신호로 변환하는 A/D 변환부를 포함한다. 샘플링 주파수, 주파수 옵셋, OFDM, 보간, 추정
Abstract:
PURPOSE: A sampling frequency synchronizing device of an OFDM system is provided to reduce the error of sampling frequency offset estimation by applying a weighting value according to a variance value to a sampling frequency offset estimation value after complex conjugate multiplication. CONSTITUTION: An adaptive noise removing filter removes noises. A complex conjugate multiplication part computes a variance pilot between adjacent two received signals using a first complex conjugate multiplication. The complex conjugate multiplication part computes two signals which are continuous among signals which are generated with the first complex conjugate multiplication using a second complex conjugate multiplication. The complex conjugate multiplication part generates a complex conjugate calculation value. A sampling frequency generation part generates a sampling frequency. An A/D converter changes a received signal into a digital signal.
Abstract translation:目的:提供OFDM系统的采样频率同步装置,通过在复共轭乘法后将采样频率偏移估计值中的方差值应用加权值来减少采样频率偏移估计的误差。 构成:自适应噪声去除滤波器去除噪声。 复共轭乘法部分使用第一复共轭乘法计算相邻两个接收信号之间的方差导频。 复共轭乘法部分计算在使用第二复共轭乘法的第一复共轭乘法产生的信号中连续的两个信号。 复共轭乘法部分产生复共轭计算值。 采样频率产生部分产生采样频率。 A / D转换器将接收的信号改变为数字信号。