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41. 发明申请

US20080182611A1 METHOD OF ALLOCATING TRANSMISSION POWER BASED ON SYMBOL ERROR RATE FOR ORTHOGONAL SPACE-TIME BLOCK CODES IN A DISTRIBUTED WIRELESS COMMUNICATION SYSTEM 有权
标题翻译：基于分布式无线通信系统中正交空时块的符号误码率分配传输功率的方法
公开(公告)号：US20080182611A1
公开(公告)日：2008-07-31
申请号：US12018887
申请日：2008-01-24
申请人： Shuangfeng Han , Seong-Taek Hwang , Byung-Jik Kim , Han-Lim Lee
发明人： Shuangfeng Han , Seong-Taek Hwang , Byung-Jik Kim , Han-Lim Lee
IPC分类号： H04B7/00
CPC分类号： H04W52/42 , H04W52/20
摘要： Disclosed is a device for allocating transmission power using a symbol error rate (SER) for orthogonal space-time block codes (OSTBC) in a wireless communication system. The device includes: a plurality of antennas, which are distributed geographically and independently linked to a central processing unit; a receiver to select an optimum subset of the SER performance, using a preset power allocation to each of available antenna subset combinations, and sending the selected subset to a transmitter; and a central processing unit to allocate power by applying an OSTBC symbol having a unit average power to the optimum subset from the receiver.
摘要翻译：公开了一种用于在无线通信系统中使用正交空时块码（OSTBC）的符号错误率（SER）来分配发送功率的装置。该设备包括：多个天线，分布在地理上和独立地连接到中央处理单元; 使用对每个可用天线子组合的预设功率分配以及将所选择的子集发送到发射机的接收机来选择SER性能的最佳子集; 以及中央处理单元，通过从接收器向最佳子集应用具有单位平均功率的OSTBC符号来分配功率。

42. 发明申请

US20070058978A1 Wireless remote access base station and pico-cell system using the same 失效
标题翻译：无线远程接入基站和微微小区系统使用相同
公开(公告)号：US20070058978A1
公开(公告)日：2007-03-15
申请号：US11519613
申请日：2006-09-12
申请人： Han-Lim Lee , Seong-Taek Hwang , Young-Sik Kim , Ji-Chai Jeong , Ho-Deok Jang , Sub Hur
发明人： Han-Lim Lee , Seong-Taek Hwang , Young-Sik Kim , Ji-Chai Jeong , Ho-Deok Jang , Sub Hur
IPC分类号： H04B10/00
CPC分类号： H04B10/25758 , H04W4/18 , H04W88/04 , H04W88/085
摘要： A wireless remote access base station for converting a downstream optical signal to a downstream radio frequency (RF) signal, transmitting the converted downstream RF signal wirelessly, converting a received upstream RF signal to an upstream optical signal, and transmitting the upstream optical signal is provided. The remote base station includes: an electro-absorption modulator (EAM) for converting a downstream optical signal to a downstream RF signal and an upstream RF signal to an upstream optical signal; an antenna for transmitting the downstream RF signal wirelessly and outputting the upstream RF signal received wirelessly to the EAM; and an amplifier, which is located between the EAM and the antenna, amplifies the downstream RF signal and outputs the amplified downstream RF signal to the antenna.
摘要翻译：一种用于将下行光信号转换为下行射频（RF）信号的无线远程接入基站，将经转换的下行RF信号无线发送，将接收的上行RF信号转换为上行光信号，并发送上行光信号。远程基站包括：用于将下行光信号转换为下行RF信号的电吸收调制器（EAM），以及将上行RF信号转换为上行光信号; 用于无线地发送下行RF信号并将无线接收的上行RF信号输出到EAM的天线; 并且位于EAM和天线之间的放大器放大下游RF信号，并将放大的下行RF信号输出到天线。

43. 发明授权

US07653313B2 Wireless remote access base station and pico-cell system using the same 失效
标题翻译：无线远程接入基站和微微小区系统使用相同
公开(公告)号：US07653313B2
公开(公告)日：2010-01-26
申请号：US11519613
申请日：2006-09-12
申请人： Han-Lim Lee , Seong-Taek Hwang , Young-Sik Kim , Ji-Chai Jeong , Ho-Deok Jang , Sub Hur
发明人： Han-Lim Lee , Seong-Taek Hwang , Young-Sik Kim , Ji-Chai Jeong , Ho-Deok Jang , Sub Hur
IPC分类号： H04B10/00
CPC分类号： H04B10/25758 , H04W4/18 , H04W88/04 , H04W88/085
摘要： A wireless remote access base station for converting a downstream optical signal to a downstream radio frequency (RF) signal, transmitting the converted downstream RF signal wirelessly, converting a received upstream RF signal to an upstream optical signal, and transmitting the upstream optical signal is provided. The remote base station includes: an electro-absorption modulator (EAM) for converting a downstream optical signal to a downstream RF signal and an upstream RF signal to an upstream optical signal; an antenna for transmitting the downstream RF signal wirelessly and outputting the upstream RF signal received wirelessly to the EAM; and an amplifier, which is located between the EAM and the antenna, amplifies the downstream RF signal and outputs the amplified downstream RF signal to the antenna.
摘要翻译：一种用于将下行光信号转换为下行射频（RF）信号的无线远程接入基站，将经转换的下行RF信号无线发送，将接收的上行RF信号转换为上行光信号，并发送上行光信号。远程基站包括：用于将下行光信号转换为下行RF信号的电吸收调制器（EAM），以及将上行RF信号转换为上行光信号; 用于无线地发送下行RF信号并将无线接收的上行RF信号输出到EAM的天线; 并且位于EAM和天线之间的放大器放大下游RF信号，并将放大的下行RF信号输出到天线。

44. 发明申请

US20080205538A1 METHOD FOR SER APPROXIMATION FOR OSTBC IN DISTRIBUTED WIRE COMMUNICATION SYSTEMS 有权
标题翻译：用于分布式电线通信系统中OSTBC的伺服近似的方法
公开(公告)号：US20080205538A1
公开(公告)日：2008-08-28
申请号：US12034723
申请日：2008-02-21
申请人： Shuangfeng HAN , Seong-Taek Hwang , Han-Lim Lee
发明人： Shuangfeng HAN , Seong-Taek Hwang , Han-Lim Lee
IPC分类号： H04B7/12
CPC分类号： H04L1/20 , H04B7/0443 , H04L1/0618 , Y02D70/444
摘要： A method for Symbol Error Rate (SER) approximation of an SER-based transmission power allocation operation for an Orthogonal Space Time Block Code in a DWCS equipped with multiple transmission Distributed Antennas (DA) geographically dispersed at random. The method for SER approximation includes the steps of: setting multiple combinable antenna subsets from the multiple DAs; selecting a quasi-optimal antenna subset Ag (1≦g≦2n−1) having a quasi-optimal power allocation weight wg based on predetermined power allocation, for each of the set multiple antenna subsets; and calculating an SER approximation value of the selected quasi-optimal antenna subset by applying a Probability Density Function (PDF) of a Signal-to-Noise Ratio (SNR) to the OSTBC SER having symbol constellation of a predetermined modulation scheme. The output of the SER approximation value can be output to a transmitter, or to a space-time encoder of a central processor for optimal power transmission.
摘要翻译：一种用于在配备有随机分布的多传输分布式天线（DA）的DWCS中的正交空间时间块码的基于SER的发射功率分配操作的符号误码率（SER）近似方法。 SER近似的方法包括以下步骤：从多个DA设置多个可组合天线子集; 选择具有准最优功率分配权重w（g）的准最优天线子集A 1（1 <= G 2 = 基于预定功率分配，对于所设置的多个天线子集中的每一个; 以及通过将具有信号噪声比（SNR）的概率密度函数（PDF））应用于具有预定调制方案的符号星座图的OSTBC SER来计算所选择的准最佳天线子集的SER近似值。 SER近似值的输出可以输出到中央处理器的发射机或时空编码器，以实现最佳的功率传输。

45. 发明授权

US07060970B2 Temperature compensating device for APD optical receiver 失效
标题翻译： APD光接收机温度补偿装置
公开(公告)号：US07060970B2
公开(公告)日：2006-06-13
申请号：US10688496
申请日：2003-10-17
申请人： Hee-Won Cheung , Seong-Taek Hwang , Han-Lim Lee , Byung-Chang Kang
发明人： Hee-Won Cheung , Seong-Taek Hwang , Han-Lim Lee , Byung-Chang Kang
IPC分类号： H01J40/14 , H01J7/24
CPC分类号： H01L31/02027 , H02M3/156
摘要： Disclosed is a temperature-compensating device for an APD optical-receiver system using an APD (Avalanche Photo Diode). The device includes a temperature-compensating circuit which employs a digital potentiometer capable of linear compensation through data look-up in compensating the decrease in gain caused by the temperature change of the APD.
摘要翻译：公开了一种使用APD（雪崩光电二极管）的APD光接收机系统的温度补偿装置。该装置包括温度补偿电路，其采用能够通过数据查找线性补偿的数字电位器来补偿由APD的温度变化引起的增益的降低。

46. 发明授权

US07120848B2 Apparatus and method for forward error correction 有权
标题翻译：前向纠错装置及方法
公开(公告)号：US07120848B2
公开(公告)日：2006-10-10
申请号：US10358535
申请日：2003-02-05
申请人： Yong-Deok Kim , Yun-Je Oh , Jun-Ho Koh , Han-Lim Lee , Byung-Jik Kim , Chan-Youl Kim
发明人： Yong-Deok Kim , Yun-Je Oh , Jun-Ho Koh , Han-Lim Lee , Byung-Jik Kim , Chan-Youl Kim
IPC分类号： H03M13/00
CPC分类号： H04L1/0047
摘要： The provided forward error correction (FEC) apparatus for a transmission system includes a low pass filter (LPF) passing only a low frequency component of an input signal having a predetermined transmission rate; an AC power meter converting an energy value of an signal output from the LPF into a DC voltage value; a logarithm amplifier converting the exponentially varying DC voltage value from the AC power meter into a linear logarithmically varying DC voltage value; a digital signal processor (DSP) determining the transmission rate of the input signal according to a magnitude of the linear DC voltage value and outputting a control signal according to the transmission rate; a clock generator receiving the control signal and generating a clock signal according to the control signal; and a FEC module receiving the clock signal and performing FEC operation on the received signal. A method for FEC is also provided.
摘要翻译：所提供的用于传输系统的前向纠错（FEC）装置包括仅通过具有预定传输速率的输入信号的低频分量的低通滤波器（LPF）; 将从LPF输出的信号的能量值转换为DC电压值的AC功率计; 对数放大器将来自AC功率计的指数变化的DC电压值转换成线性对数变化的DC电压值; 数字信号处理器（DSP），根据线性DC电压值的大小确定输入信号的传输速率，并根据传输速率输出控制信号; 接收所述控制信号并根据所述控制信号产生时钟信号的时钟发生器; 以及FEC模块，接收时钟信号并对接收到的信号执行FEC操作。还提供了一种用于FEC的方法。

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