Abstract:
본 발명은 직교 주파수 분할 다중접속 무선 휴대 인터넷 시스템의 단말기에 사용되는 레인징 의사 잡음 부호 발생 장치에 관한 것이다. 본 발명에 따르면 기지국에서 전송된 프리앰블 신호를 이용하여 단말기가 속한 기지국의 셀 인식번호를 찾아내고, 셀 인식번호와 기지국에서 주어지는 시스템 파라미터를 이용하여 레인징 모드에 알맞은 오프셋값을 가지는 레인징 의사 잡음 부호 마스크값을 찾아내며, 셀 인식번호와 레인징 의사 잡음 부호 마스크값을 이용하여 레인징 의사잡음 코드를 생성한다. 이와 같이 하면, 기지국의 셀 인식번호에 따라 동일한 초기값을 사용함과 동시에 원하는 오프셋을 가지는 레인징 의사 잡음 부호를 빠른 시간 내에 생성할 수 있다. 무선 휴대 인터넷 시스템, 직교 주파수 다중 접속, 레인징 의사 잡음 부호
Abstract:
본 발명은 직교주파수분할다중접속 시스템의 레인징 채널 처리 장치 및 방법에 관한 것이다. 본 발명에 따른 직교주파수분할다중접속 시스템의 레인징 채널 처리 장치는 레인징 수신 복소 신호에 대해 크기 및 위상을 갖는 극 좌표 신호들로 변환한다. 이와 같이 극 좌표 신호로 변환된 수신 신호는 신호의 크기 성분과 위상 성분으로 나타난다. 그리고 위상 회전에 해당하는 신호는 미리 계산된 위상 성분을 사용하여 수신신호의 위상과 위상회전에 해당하는 위상의 덧셈을 사용하여 시간지연을 추정한다. 이와 같이 하면, 직교주파수분할다중접속 방식을 사용하는 이동통신 시스템에서 역방향 사용자의 시간 지연 및 전력 세기를 승산 성분이 없는 가산 성분의 연산만으로 구할 수 있으므로 연산량이 줄어든다.
Abstract:
PURPOSE: A device of deciding whether an STTD(Space-Time block coding based Transmit Diversity) is used in a base station and a method thereof are provided to decide whether the STTD is used in the base station having two transmission antennas, so as to perform an exact frequency error correction, thereby improving performance of an entire demodulator. CONSTITUTION: A cell searcher(100) searches a base station where a mobile station is included, through I and Q baseband signals, and obtains a frame timing and a scrambling code of the base station. A scrambling code generator(210) generates the corresponding scrambling code according to the frame timing of the base station with the obtained scrambling code and timing information. The scrambling code is multiplied by the I and the Q baseband signals with the use of a multiplier(215) at correct timing, and is descrambled. A descrambled signal is despread by an accumulator(220). A multiplier(232) multiplies a pilot symbol pattern generated in a CPICH Ant1 symbol pilot generator(230) by the despread signal, and performs de-patternization. A multiplier(242) multiplies a pilot symbol pattern generated in a CPICH Ant2 symbol pilot generator(240) by the despread signal, and performs de-patternization. The first accumulator bank(250) and the second accumulator bank(260) commonly input signals outputted from the two multipliers(232,242).
Abstract:
PURPOSE: A data processing method, an equalizer, and a receiver are provided to generate an equalization signal by multiplying a weight vector to a base station signal and a relay signal. CONSTITUTION: A base station signal is received from a base station(S610). A relay signal is received from a relay(S620). Propagation delay between the relay signal and the base station signal is determined(S630). An equalization signal alleviating the interference between the base station signal and the relay signal is generated in consideration of the propagation delay(S640). An information bit transmitted by the base station is restored from the equalization signal(S650). The equalization signal is generated by multiplying a weight vector to the base station signal and the relay signal. [Reference numerals] (S610) Base station signal receiving; (S620) Relay signal receiving; (S630) Propagation delay determination; (S640) Equalization signal generation; (S650) Information bit restoration
Abstract:
PURPOSE: A resource allocation information detection method in a wireless communication system and apparatus thereof are provided to effectively process the resource allocation information regardless of the separation of resource allocation information. CONSTITUTION: A resource allocation information detection apparatus detects numbers of A-A(Assignment Advanced)-MAP information elements and numbers of A-A-MAP groups(100). The resource allocation information detection apparatus extracts flags and the type of each A-A-MAP IE type(200). The resource allocation information detection apparatus detects resource allocation information based on the flag and the type of the A-A-MAP IE type.
Abstract:
PURPOSE: A method for estimating channel under channel environment in which interference of neighboring base station exists in a wireless communication system and a device thereof are provide to determine existence of inverse matrix about covariance matrix of pilot subcarrier matrix included in one or more PUSC(Partial Usage Sub-Channel) cluster and obtain average about channel estimate result, thereby enhancing reliability of channel estimation. CONSTITUTION: In case of reverse matrix of covariance matrix related to pilot matrix does not exist in channel estimation result, a pilot matrix configuration unit(11) configures new pilot matrix. A channel estimation unit(12) performs averaging with the pre-obtained channel estimation result about the obtained channel estimation result and the other PUSC cluster. The channel estimation unit uses the performed result as the channel estimation result. A reverse matrix decision unit(13) determines the existence of the reverse matrix within the channel estimation result.
Abstract:
A method for estimating a channel in a mobile communication network and an apparatus for performing the same are provided to improve the performance in comparison with a method of estimating a channel by using a pilot subcarrier included in a single cluster. One cluster, consisting of a data subcarrier signal and a pilot signal, is transmitted from the first base station and the second base station(S100). Respective received clusters are separated into two sub-clusters(S200). Signals transmitted from the first and second base stations are constructed into a channel estimation group(S300). A channel is estimated by using the pilot subcarrier signal included in the channel estimation group(S400).