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公开(公告)号：KR1020050038122A
公开(公告)日：2005-04-27
申请号：KR1020030073341
申请日：2003-10-21
Applicant: 한국전자통신연구원
IPC: H04B7/04
CPC classification number: H04L25/03057 , H04B7/04 , H04L2025/03611
Abstract: 본 발명은 다중입력 다중출력에서의 적응 수신 시스템 및 그 방법에 관한 것이다.
다중입력 다중출력에서의 적응 수신 시스템 및 그 방법은, 송신 안테나의 수만큼 병렬로 구성되어 있는 등화기마다 심벌을 추정할 때의 최소 자승 오차의 가중치 합이 최소가 되는 심벌을 추정하도록 심벌 검파 순서를 결정하고, 이 검파 순서에 맞추어 RLS 알고리즘에 기반한 필터 탭 계수를 갱신하도록 하는 것이다.
이와 같이 하면, 시간적으로 변하는 채널 환경 하에서도 채널 추적 과정 없이 필터 탭 계수를 직접 갱신하고, 그로 인해 채널 추적과 기존의 V-BLAST 방식에 비해 복잡도가 감소하면서도 거의 동일한 검파 성능을 나타낼 수 있다.-
42.发明公开
公开(公告)号：KR1020040058440A
公开(公告)日：2004-07-05
申请号：KR1020020084478
申请日：2002-12-26
Applicant: 한국전자통신연구원
IPC: H04B7/06
CPC classification number: H04B7/0891 , H04B7/0417 , H04B7/0626 , H04B7/0697 , H04L1/0003 , H04L1/0656 , H04L5/0007 , H04L5/0023 , H04L5/0028 , H04L5/0046 , H04L5/006 , H04W52/42
Abstract: PURPOSE: An adaptive modulation/demodulation device applied to an MIMO(Multi-Input Multi-Output) system having a layered space-time architecture detector and a method thereof are provided to determine an equivalent channel gain, and to determine the number of bits and transmission power to be transmitted through each antenna by using the equivalent channel gain, thereby improving system performance. CONSTITUTION: A bit and power assign information calculator(54) determines an equivalent channel gain in reverse order of a V-BLAST(Vertical-Bell Laboratories Space Time) system based on MIMO channel information fed back from a receiving end, and determines the number of bits and transmission power to be transmitted to each transmission antenna(53A-53M) by using the determined equivalent channel gain. A layered space-time architecture-based adaptive modulator(52) performs a modulation process in different methods by each antenna(53A-53M) with the use of the determined bits and the power assign information, controls the transmission power, and transmits an adaptively modulated signal through each transmission antenna(53A-53M).
Abstract translation: 目的：提供一种应用于具有分层时空架构检测器及其方法的MIMO（多输入多输出）系统的自适应调制/解调装置，用于确定等效信道增益，并确定位数和 通过使用等效信道增益来传输通过每个天线的发射功率，从而提高系统性能。 构成：基于从接收端反馈的MIMO信道信息，位和功率分配信息计算器（54）以V-BLAST（Vertical-Bell Laboratories Space Time）系统的相反顺序确定等效信道增益， 的比特和发送功率，通过使用确定的等效信道增益发送到每个发送天线（53A-53M）。 基于分层时空架构的自适应调制器（52）通过使用确定的比特和功率分配信息，通过每个天线（53A-53M）以不同的方法执行调制处理，控制发送功率，并自适应地发送 通过每个发射天线（53A-53M）调制信号。
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公开(公告)号：KR1020030049182A
公开(公告)日：2003-06-25
申请号：KR1020010079322
申请日：2001-12-14
Applicant: 한국전자통신연구원
IPC: H04B3/04
CPC classification number: H03G3/20
Abstract: PURPOSE: An Apparatus and a method for controlling automatic gain in wireless telecommunication system are provided to normally operate a system by deciding a suitable gain of a variable gain amplifier in a digital domain within a short training interval and converging the gain within a provided time. CONSTITUTION: A variable gain amplifier(11) amplifies an I(In-phase) signal and a Q(Quadrature phase) signal according to a gain adjustment value. An I-Q demodulator(12) demodulates the I signal and the Q signal amplified in the variable gain amplifier(11). An ADC(Analog to Digital Converter)(13) converts the analog I signal demodulated in the I-Q demodulator(12) into a digital I signal. A maximum value sample counter(15) counts the number of samples in which the output of the ADC(13) indicates an maximum value. An ADC(14) converts the analog Q signal demodulated in the I-Q demodulator(12) into a digital Q signal. A maximum value sample counter(16) counts the number of samples in which the output of the ADC(14) indicates the maximum value. An amplifier gain calculator(17) decides a gain to be adjusted in a digital domain by function relation between a signal distortion degree indicated by the number of samples counted in the maximum value sample counters(15,16) and a gain to be adjusted. A DAC(Digital to Analog Converter)(18) converts the gain adjustment value of the digital domain, which is calculated in the amplifier gain calculator(17), into an analog adjustment value, and transmits the analog voltage value to the variable gain amplifier(11).
Abstract translation: 目的：提供一种用于控制无线电信系统中的自动增益的装置和方法，以通常在短的训练间隔内通过决定数字域中的可变增益放大器的适当增益来正常操作系统，并在所提供的时间内收敛增益。 构成：可变增益放大器（11）根据增益调整值放大I（同相）信号和Q（正交相位）信号。 I-Q解调器（12）解调在可变增益放大器（11）中放大的I信号和Q信号。 ADC（模数转换器）（13）将I-Q解调器（12）中解调的模拟I信号转换为数字I信号。 最大值采样计数器（15）对ADC（13）的输出表示最大值的样本数进行计数。 ADC（14）将在I-Q解调器（12）中解调的模拟Q信号转换为数字Q信号。 最大值采样计数器（16）对ADC（14）的输出表示最大值的样本数进行计数。 放大器增益计算器（17）通过由最大值采样计数器（15,16）中计数的采样数表示的信号失真度与要调整的增益之间的函数关系来确定数字域中要调整的增益。 DAC（数模转换器）（18）将在放大器增益计算器（17）中计算的数字域的增益调整值转换为模拟调整值，并将模拟电压值发送到可变增益放大器 （11）。
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公开(公告)号：KR1020210030328A
公开(公告)日：2021-03-17
申请号：KR1020210031199
申请日：2021-03-10
Applicant: 한국전자통신연구원
Abstract: 다중대역폭을지원하는무선랜시스템의통신방법및 장치가개시된다. 일실시예에따른광역무선랜시스템의통신방법은, 다중대역폭(multi bandwidth)을지원하는네트워크의통신장치가, 기설정된대역폭들중 신호대 잡음비가가장낮은제1 대역폭및 상기제1 대역폭의 2배크기인제2 대역폭중 어느하나의대역폭에기초하여기본프레임을생성하는단계와, 상기기본프레임에기초하여듀플리케이션모드(duplication mode) 프레임을구성하는단계및 복수의대역(band)을통해상기듀플리케이션모드프레임을전송하는단계를포함한다.
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