公开(公告)号：US07400899B2

公开(公告)日：2008-07-15

申请号：US10895154

申请日：2004-07-19

申请人： Cheol-Ho Shin ,  Chang-Joo Kim ,  Hyung-Soo Lee ,  Sangsung Choi ,  Il-Kyoo Lee

发明人： Cheol-Ho Shin ,  Chang-Joo Kim ,  Hyung-Soo Lee ,  Sangsung Choi ,  Il-Kyoo Lee

IPC分类号： H04B7/00

CPC分类号： H04W52/12 ,  H04W52/20 ,  H04W52/24

摘要： Disclosed is a method for controlling a power level based on a packet error rate (PER) in a wireless personal area network (WPAN) system. The method for controlling a power level based on a packet error rate (PER) in a wireless personal area network (WPAN) system, includes the steps of: a) at a receiver, computing a PER of a packet in an initial check duration of PER (DP) wherein a transmission power level of the packet is set by a piconet coordinator (PNC); b) at the receiver, determining whether the computed PER satisfies a target PER, adjusting a target signal-to-interference ratio (SIR) and requesting a transmitter to adjust the initial transmission power level; and c) at the receiver, determining whether the number (N) of successive G is larger than a power control threshold, wherein G denotes DP satisfying the target PER, changing the target SIR based on the determination result whether the number (N) of successive G is larger than the power control threshold, and requesting the transmitter to adjust the possible transmission power level.

摘要翻译： 公开了一种基于无线个域网（WPAN）系统中的分组差错率（PER）来控制功率电平的方法。 基于无线个域网（WPAN）系统中的分组差错率（PER）来控制功率电平的方法包括以下步骤：a）在接收机处，在初始检测持续时间内计算分组的PER PER（DP），其中分组的发射功率电平由微微网协调器（PNC）设置; b）在接收机处，确定所计算的PER是否满足目标PER，调整目标信号干扰比（SIR）并请求发射机调整初始发射功率电平; 以及c）在接收器处，确定连续G的数量N是否大于功率控制阈值，其中G表示满足目标PER的DP，根据确定结果改变目标SIR，是否为（N） 连续G大于功率控制阈值，并请求发射机调整可能的发射功率电平。

公开(公告)号：US07366262B2

公开(公告)日：2008-04-29

申请号：US11023382

申请日：2004-12-29

申请人： Cheol HO Shin ,  Sang sung Choi ,  Kwang Roh Park

发明人： Cheol HO Shin ,  Sang sung Choi ,  Kwang Roh Park

IPC分类号： H04L27/06

CPC分类号： H04B1/7163 ,  H04B1/713 ,  H04B1/7183 ,  H04B2001/6908 ,  H04L27/2657 ,  H04L27/2676

摘要： A frequency estimation method of multiband (MB)-orthogonal frequency division multiplexing (OFDM) ultra wide band (UWB) system using an Alt-PHY time frequency (TF) hopping strategy based on IEEE 802. 15. 3a. includes the steps of: a) selecting a predetermined number of frequencies among a plurality of center frequencies based on a predetermined number of OFDM symbols and estimating relative frequency offsets for selected frequencies; b) obtaining an average relative frequency offset by averaging the estimated relative frequency offsets when two or more frequencies are selected at the step a); and c) obtaining real frequency offsets for each of the center frequencies by transforming the obtained average relative frequency offset to the real frequency offsets and compensating a frequency offset caused by a transmitting/receiving local oscillators based on the obtained real frequency offsets.

摘要翻译： 基于IEEE 802.11的使用Alt-PHY时间频率（TF）跳频策略的多频带（MB） - 正交频分复用（OFDM）超宽带（UWB）系统的频率估计方法。 包括以下步骤：a）基于预定数量的OFDM符号来选择多个中心频率中的预定数量的频率，并估计所选频率的相对频率偏移; b）当在步骤a）选择两个或更多个频率时，通过平均所估计的相对频率偏移来获得平均相对频率偏移; 以及c）通过将所获得的平均相对频率偏移变换为实际偏移量来获得每个中心频率的实际频率偏移，并且基于所获得的实频偏移来补偿由发送/接收本地振荡器引起的频率偏移。

公开(公告)号：US20070180015A1

公开(公告)日：2007-08-02

申请号：US11636242

申请日：2006-12-08

申请人： Sang-In Cho ,  Cheol-Ho Shin ,  Kyu-Min Kang ,  Sung-Woo Choi ,  Sang-Sung Choi ,  Jin-Gyun Chung ,  Yong-Eun Kim

发明人： Sang-In Cho ,  Cheol-Ho Shin ,  Kyu-Min Kang ,  Sung-Woo Choi ,  Sang-Sung Choi ,  Jin-Gyun Chung ,  Yong-Eun Kim

IPC分类号： G06F7/52

CPC分类号： G06F7/533

摘要： Provided are a high speed and low power fixed-point multiplier and method thereof. The multiplier includes: a partial product calculation unit for dividing input data into a plurality of bit groups, each bit group having a predetermined number of bits, generating partial products by independently multiplying a fixed coefficient for each bit group, and summing partial products included in a corresponding bit group, to thereby generate a summed partial products; and an adding unit for adding the summed partial products of each bit group generated from the partial product calculation unit.

摘要翻译： 提供了一种高速和低功率定点倍增器及其方法。 乘法器包括：部分乘积计算单元，用于将输入数据分成多个比特组，每个比特组具有预定数量的比特，通过独立地乘以每个比特组的固定系数产生部分乘积，并将包括在 相应的位组，从而产生相加的部分积; 以及添加单元，用于添加从所述部分乘积计算单元生成的每个位组的相加的部分乘积。

公开(公告)号：US20130058360A1

公开(公告)日：2013-03-07

申请号：US13605230

申请日：2012-09-06

申请人： Mi Kyung Oh ,  Young Ae Jeon ,  Sangjae Lee ,  Jaehwan Kim ,  Cheol-ho Shin ,  Byoung Hak Kim ,  Seung Sik Lee ,  Sangsung Choi ,  Jae Young Kim

发明人： Mi Kyung Oh ,  Young Ae Jeon ,  Sangjae Lee ,  Jaehwan Kim ,  Cheol-ho Shin ,  Byoung Hak Kim ,  Seung Sik Lee ,  Sangsung Choi ,  Jae Young Kim

IPC分类号： H04L27/12 ,  H04L27/14

CPC分类号： H04L27/12 ,  H04L1/0009 ,  H04L1/0054 ,  H04L1/0059 ,  H04L1/007 ,  H04L1/0071 ,  H04L1/0072 ,  H04L27/14

摘要： A method of generating a packet for low energy critical infrastructure monitoring (LECIM) wireless communication is provided. The method includes steps of generating a first bit string by multiplexing a physical layer header (PHR) bit and a physical layer service data unit (PSDU) bit; convolution encoding the first bit string; interleaving the convolution-encoded first bit string; generating a second bit string by multiplexing the interleaved first bit string with a synchronization header (SHR) bit; and modulating the second bit string with a frequency shift keying (FSK) method and a position-based FSK method.

摘要翻译： 提供了一种生成用于低能量关键基础设施监控（LECIM）无线通信的数据包的方法。 该方法包括以下步骤：通过复用物理层报头（PHR）比特和物理层业务数据单元（PSDU）比特来生成第一比特串; 卷积编码第一个位串; 交织卷积编码的第一位串; 通过将交织的第一比特串与同步头（SHR）比特进行复用来产生第二比特串; 并用频移键控（FSK）方法和基于位置的FSK方法调制第二位串。

公开(公告)号：US20120051400A1

公开(公告)日：2012-03-01

申请号：US12987564

申请日：2011-01-10

申请人： Cheol Ho SHIN

发明人： Cheol Ho SHIN

IPC分类号： H04B1/69

CPC分类号： H04L27/2602

摘要： Disclosed are a method and an apparatus for creating a frame of an orthogonal frequency division multiplexing (OFDM) specification using a frequency domain spreading (FDS). The method and the apparatus determine a number of padding bits based on various FDSs and a size of an interleaver and constitute a frame including a determined number of padding bits, so that there is provided a frame which is adequate for a data transmission rate using various FDSs and which includes a minimal number of redundant OFDM symbol.

摘要翻译： 公开了一种使用频域扩展（FDS）创建正交频分复用（OFDM）规范的帧的方法和装置。 该方法和装置基于各种FDS和交织器的大小确定多个填充比特，并且构成包括确定数量的填充比特的帧，从而提供一种适用于使用各种数据的数据传输速率的帧 FDS，其包括最少数量的冗余OFDM符号。

公开(公告)号：US07830973B2

公开(公告)日：2010-11-09

申请号：US11930836

申请日：2007-10-31

申请人： Sang-In Cho ,  Kyu-Min Kang ,  Cheol-Ho Shin ,  Sang-Sung Choi ,  Kwang-Roh Park

发明人： Sang-In Cho ,  Kyu-Min Kang ,  Cheol-Ho Shin ,  Sang-Sung Choi ,  Kwang-Roh Park

IPC分类号： H04L27/28

CPC分类号： H04L27/2656 ,  H04L27/2675

摘要： There is provided an apparatus for detecting a preamble packet in an orthogonal frequency-division multiplexing (OFDM) system, including: a cross-correlation calculating means for calculating a cross-correlation value between a received signal and previously stored preamble pattern values for an OFDM symbol region (N-point); a delay means for delaying the calculate cross-correlation value as much as a M-point interval; a receiving power measuring means for measuring a receiving power for the guard interval; and a dividing means for calculating a final cross-correlation value by dividing the delayed cross correlation value by the measured power.

摘要翻译： 提供了一种用于在正交频分复用（OFDM）系统中检测前导分组的装置，包括：互相关计算装置，用于计算接收信号与先前存储的用于OFDM的前导码模式值之间的互相关值 符号区域（N点）; 用于将计算互相关值延迟多达M点间隔的延迟装置; 接收功率测量装置，用于测量所述保护间隔的接收功率; 以及分割装置，用于通过将延迟互相关值除以测量的功率来计算最终互相关值。

公开(公告)号：US07649926B2

公开(公告)日：2010-01-19

申请号：US11636049

申请日：2006-12-08

申请人： Kyu-Min Kang ,  Sang-Sung Choi ,  Kwang-Roh Park ,  Sang-In Cho ,  Sung-Woo Choi ,  Cheol-Ho Shin

发明人： Kyu-Min Kang ,  Sang-Sung Choi ,  Kwang-Roh Park ,  Sang-In Cho ,  Sung-Woo Choi ,  Cheol-Ho Shin

IPC分类号： H04B1/00

CPC分类号： H04B1/709 ,  H04B1/707 ,  H04B1/7115 ,  H04B1/71637 ,  H04B1/7183

摘要： A rake receiver for DS-CDMA UWB system and a DS-CDMA receiver having the same are provided. The rake receiver includes: a channel estimator for estimating a channel having a predetermined chip duration by using a synchronization acquisition sequence; a tracking module for detecting a channel variation and adjusting a synchronization position value when the channel variation is detected; a first switch for selecting one of an output value of an analog-to-digital converter and an output value of a correlator and outputting the selected value; a second switch for selecting one of the output value of the analog-to-digital converter and the output value of the correlator; and a plurality of demodulators having a parallel processing structure to demodulate received signals by using the channel estimation value inputted from the channel estimator, the synchronization position value stored by the tracking module, and an output value of the second switch.

摘要翻译： 提供了一种用于DS-CDMA UWB系统的瑞克接收机和具有该接收机的DS-CDMA接收机。 耙式接收机包括：信道估计器，用于通过使用同步获取序列来估计具有预定码片持续时间的信道; 跟踪模块，用于在检测到信道变化时检测信道变化并调整同步位置值; 用于选择模数转换器的输出值之一和相关器的输出值并输出所选值的第一开关; 用于选择模数转换器的输出值之一和相关器的输出值的第二开关; 以及具有并行处理结构的多个解调器，通过使用从信道估计器输入的信道估计值，由跟踪模块存储的同步位置值和第二开关的输出值来解调接收信号。

公开(公告)号：US20090154532A1

公开(公告)日：2009-06-18

申请号：US12201084

申请日：2008-08-29

申请人： Cheol Ho SHIN ,  Byoung Hak KIM ,  Sang Sung CHOI ,  Kwang Rho Park

发明人： Cheol Ho SHIN ,  Byoung Hak KIM ,  Sang Sung CHOI ,  Kwang Rho Park

IPC分类号： H04B1/707

CPC分类号： H04L27/2665 ,  H04L27/2656 ,  H04L27/2657 ,  H04L27/2675

摘要： The present invention relates to an apparatus and a method for receiving signal for extent of timing synchronization in MB-OFDM UWB System. The invention divides the digital samples completed of sampling twice as much as minimum sampling clock required to restore the MB-OFDM received signal into ODD data path and EVEN data path, executes the packet detection and timing synchronization for each of divided path and selects the data of path with larger cross correlation value at the timing synchronization point to secure the stable receiving performance in system environment with severe frequency offset and prevent the FTT window shift within preamble section through adding minimum hardware and structural change without increasing the system clock.

摘要翻译： 本发明涉及一种用于在MB-OFDM UWB系统中接收定时同步程度的信号的装置和方法。 本发明将采样完成的数字采样与将数据采集信号恢复为ODD数据路径和EVEN数据通路所需的最小采样时钟相同，执行分割路径每个分组检测和定时同步，并选择数据 的路径在定时同步点具有较大的互相关值，以确保具有严重频率偏移的系统环境中的稳定接收性能，并且通过在不增加系统时钟的情况下添加最小硬件和结构变化来防止前导码部分内的FTT窗口偏移。

公开(公告)号：US20080130722A1

公开(公告)日：2008-06-05

申请号：US11948179

申请日：2007-11-30

申请人： Sung-Woo CHOI ,  Cheol-Ho SHIN ,  Kyu-Min KANG ,  Sang-Sung CHOI

发明人： Sung-Woo CHOI ,  Cheol-Ho SHIN ,  Kyu-Min KANG ,  Sang-Sung CHOI

IPC分类号： H04B1/69

CPC分类号： H04B1/713 ,  H04B1/709 ,  H04L5/0007 ,  H04L5/0037 ,  H04L27/2655 ,  H04L27/2675

摘要： Provided is an apparatus and method for detecting a time-frequency code in an MB-OFDM UWB system. The apparatus includes a controller for providing a band selection signal to the RF receiver and outputting a preamble selection signal at regular symbol periods to calculate a cross correlation value for a predetermine time period more than a beacon frame interval when a time-frequency code search start signal is received; and a cross correlator for storing information on preamble patterns, selecting a preamble stored depending on the preamble selection signal, and calculating a cross correlation value for a digital signal transferred through the RF receiver, wherein the controller determines a time-frequency code using a preamble where a peak occurs as a time-frequency code that is currently in use when a peak signal is inputted based on the calculated cross correlation value, and transmits the determined time-frequency code to the MAC receiver.

摘要翻译： 提供了一种用于检测MB-OFDM UWB系统中的时间 - 频率代码的装置和方法。 该装置包括：控制器，用于向RF接收机提供频带选择信号，并以规则符号周期输出前同步码选择信号，以便在时间频率代码搜索开始时比预定的时间段大于信标帧间隔计算互相关值 信号被接收; 以及交叉相关器，用于存储关于前导码模式的信息，选择根据前导选择信号存储的前导码，以及计算通过RF接收机传送的数字信号的互相关值，其中控制器使用前导码确定时间频率码 其中当基于所计算的互相关值输入峰值信号时作为当前正在使用的时间频率代码发生峰值，并将所确定的时间频率代码发送到MAC接收机。

公开(公告)号：US20080130513A1

公开(公告)日：2008-06-05

申请号：US11947923

申请日：2007-11-30

申请人： Cheol Ho SHIN ,  Sung Woo CHOI ,  Joon Hak BANG ,  Byoung Hak KIM ,  Sang Sung CHOI ,  Kwang Roh PARK

发明人： Cheol Ho SHIN ,  Sung Woo CHOI ,  Joon Hak BANG ,  Byoung Hak KIM ,  Sang Sung CHOI ,  Kwang Roh PARK

IPC分类号： G06F11/30

CPC分类号： H04L1/20 ,  H04L1/0002 ,  H04L27/2626 ,  H04L27/2647

摘要： It is possible to intuitively determine whether to control transmission power of a current data transmission rate mode or to change the data transmission rate mode by extracting an automatic gain controller (AGC) index after driving algorithm of an AGC, recognizing a channel clear assessment (CCA) status by using the extracted AGC index, and generating link quality indicator (LQI) information to be transmitted from a physical layer to a media access control (MAC) layer by using the AGC index, when the CCA status is high, in order to embody effective piconets in a multi-band orthogonal frequency division multiplexing ultra-wide band system (MB-OFDM UWB system) including a receiver having a dynamic gain controller(DGC) and the AGC.

摘要翻译： 可以直观地确定是否控制当前数据传输速率模式的传输功率，或者通过在AGC的驱动算法之后提取自动增益控制器（AGC）索引来改变数据传输速率模式，识别信道清除评估（CCA ）状态，并且当CCA状态为高时，通过使用AGC索引生成要从物理层发送到媒体访问控制（MAC）层的链路质量指示符（LQI）信息，以便 在包括具有动态增益控制器（DGC）和AGC的接收机的多频带正交频分复用超宽带系统（MB-OFDM UWB系统）中实现有效微微网。