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1. 发明申请

US20060093021A1 Code acquisition device and method using two-step search process in DS-CDMA UWB modem 失效
标题翻译：在DS-CDMA UWB调制解调器中使用两步搜索过程的码采集设备和方法
公开(公告)号：US20060093021A1
公开(公告)日：2006-05-04
申请号：US11063583
申请日：2005-02-24
申请人： Bub Kang , Kyu Kang , Sangsung Choi , Kwang Park
发明人： Bub Kang , Kyu Kang , Sangsung Choi , Kwang Park
IPC分类号： H04B1/707
CPC分类号： H04B1/70735 , H04B1/7077 , H04B1/7183
摘要： There is provided a code acquisition device and method using a two-step search process in a DS-CDMA UWB modem. The device includes: an I/Q channel symbol generating unit for, generating a plurality (i) of nth I/Q channel symbols in a first search process and generating a plurality of nth I/Q channel symbols in a second search process; a spread code selecting unit for receiving the plurality of nth I/Q channel symbols in the first search process; an NNC2NS tap I/Q channel symbol matched filter unit for, in the second search process, receiving the plurality (i) of nth I/Q channel symbols; a switching unit for changing to a closed state of the second search process; and a super frame and symbol boundary time deciding unit for deciding a super frame time and a symbol boundary time.
摘要翻译：提供了在DS-CDMA UWB调制解调器中使用两步搜索处理的代码获取装置和方法。该装置包括：I / Q信道符号生成单元，用于在第一搜索处理中生成第n个第I / Q个信道符号的多个（i），并产生多个第n个在第二搜索过程中的I / Q通道符号; 扩展码选择单元，用于在第一搜索处理中接收多个第n个I / Q信道符号; 用于在第二搜索过程中，接收多个（i）个第n个/第N个N / N个抽头I / Q通道符号匹配滤波器单元， SUB> I / Q通道符号; 用于切换到第二搜索处理的关闭状态的切换单元; 以及用于决定超帧时间和符号边界时间的超帧和符号边界时间决定单元。

2. 发明申请

US20060083269A1 Initial synchronization acquiring device and method for parallel processed DS-CDMA UWB system and DS-CDMA system's receiver using the same 有权
公开(公告)号：US20060083269A1
公开(公告)日：2006-04-20
申请号：US11065570
申请日：2005-02-25
申请人： Kyu Kang , Bub Kang , Sangsung Choi , Kwang Park , Chae Kim , Jeong Lee
发明人： Kyu Kang , Bub Kang , Sangsung Choi , Kwang Park , Chae Kim , Jeong Lee
IPC分类号： H04B7/216 , H04B1/69
CPC分类号： H04B1/71637 , H04B1/7075 , H04B1/7183
摘要： Provided are an initial synchronization acquiring device and method in a parallel processed DS-CDMA UWB system and a DS-CDMA UWB system's receiver using the same. The initial synchronization acquiring device is constructed to include a correlator for correlating input signals and outputting correlation result values and an initial synchronizer for tuning initial symbol synchronization and frame synchronization by using the correlation result values received from the correlator and then storing combining mark values and a synchronization position value in a register, thereby making it possible to greatly decrease a system's complexity, compared to the existing method of separately designing respective modules for acquiring packet synchronization and symbol synchronization in the existing CDMA system. Also, the initial synchronization acquiring device and method additionally compensates a synchronization error caused by a frequency offset generated between clocks used by a transmitter and a receiver and thereby can be efficiently used in the high-speed and parallel-processed DS-CDMA UWB system.

3. 发明申请

US20060120437A1 FIR filter of DS-CDMA UWB modem transmitter and control method thereof 有权
标题翻译： DS-CDMA UWB调制解调器发射机的FIR滤波器及其控制方法
公开(公告)号：US20060120437A1
公开(公告)日：2006-06-08
申请号：US11137468
申请日：2005-05-26
申请人： Kyu Kang , Bub Kang , Sangsung Choi , Kwang Park
发明人： Kyu Kang , Bub Kang , Sangsung Choi , Kwang Park
IPC分类号： H04B1/69
CPC分类号： H04B1/7176 , H04B1/7174 , H04B2201/70707
摘要： An FIR filter of a DS-CDMA UWB modem transmitter and a control method thereof are disclosed. The FIR filter includes an LUT control device for outputting a resultant value of “0” to all adders if data values corresponding to upper three chips H2, M2 and L2 and lower three chips H, M and L are “000000”, and discriminating which group between a first group and a second group the upper/lower data values belong to if the upper/lower data values are not “000000”. The LUT control device provides upper or lower LUT values to the adders using the upper or lower LUT values as they are, or converts the upper or lower LUT values into 2's complements and provides the converted values to the adders according to the discriminated first or second group. The FIR filter has the effect of reducing the amount of memory by about 50% to 80% in comparison to the conventional FIR filter.
摘要翻译：公开了DS-CDMA UWB调制解调发射机的FIR滤波器及其控制方法。如果对应于上三个码片H 2，M 2和L 2以及较低的三个码片H，M和L的数据值为“000000”，则FIR滤波器包括LUT控制装置，用于向所有加法器输出结果值“0” 并且如果所述上/下数据值不是“000000”，则鉴别所述上/下数据值属于第一组和第二组之间的组。 LUT控制装置使用上下LUT值向加法器提供上或下LUT值，或者将上或下LUT值转换为2的补码，并根据所识别的第一或第二值向加法器提供转换的值组。与常规FIR滤波器相比，FIR滤波器具有将存储器量减少约50％至80％的效果。

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