公开(公告)号：US08050237B2

公开(公告)日：2011-11-01

申请号：US11963881

申请日：2007-12-24

申请人： Hongwei Kong ,  Jun Wu

发明人： Hongwei Kong ,  Jun Wu

IPC分类号： H04B1/216

CPC分类号： H04W52/42 ,  H04B7/0871 ,  H04B17/345

摘要： Apparatus and method to process a pilot channel and a synchronization channel to obtain a combined noise estimate of the pilot channel and the synchronization channel that is synchronized to the pilot channel. The combined noise estimation is processed to determine a first noise component for a period when both the pilot channel and the synchronization channel are present. Then, the combined noise estimate is processed to determine a second noise component for a period when only the pilot channel is present. Next, the second noise component is subtracted from the first noise component to derive a noise estimation for the synchronization channel. The technique may be applied to the Common Pilot Channel (CPICH), and the Synchronization Channel (SCH) defined in a 3rd Generation Partnership Project standard specification.

摘要翻译： 用于处理导频信道和同步信道以获得与导频信道同步的导频信道和同步信道的组合噪声估计的装置和方法。 处理组合噪声估计以确定在导频信道和同步信道都存在的时段中的第一噪声分量。 然后，处理组合噪声估计，以便在仅存在导频信道的时段中确定第二噪声分量。 接下来，从第一噪声分量中减去第二噪声分量，以导出同步信道的噪声估计。 该技术可以应用于公共导频信道（CPICH）和在第三代合作伙伴计划标准规范中定义的同步信道（SCH）。

公开(公告)号：US07068709B2

公开(公告)日：2006-06-27

申请号：US09990324

申请日：2001-11-23

申请人： Jun Hasegawa

发明人： Jun Hasegawa

IPC分类号： H04B1/69 ,  H04B1/216

CPC分类号： H04B1/7077 ,  H04B1/70754 ,  H04B1/70755

摘要： A code synchronous timing determining method comprising acquiring correlation values of a code at plural timings in each of a plural given time widths included in a given period, storing the correlation values corresponding to the plural timings, retrieving the maximal correlation value from the stored correlation values to register a retrieved timing corresponding to the maximal correlation value as the maximal timing, scanning the stored correlation values in a given direction to detect at least one minimal correlation value to register a retrieved timing corresponding to the detected minimal correlation value, extracting at least one correlation value selected from the correlation values stored at plural timings having a specified time interval from the maximal timing to the minimal timing as a high correlation value candidate, and holding timing data corresponding to the high correlation value candidate as timing information of code synchronism.

公开(公告)号：US07359427B2

公开(公告)日：2008-04-15

申请号：US10412576

申请日：2003-04-14

申请人： Emmanuel Kanterakis ,  Kourosh Parsa

发明人： Emmanuel Kanterakis ,  Kourosh Parsa

IPC分类号： H04B1/00 ,  H04B1/216

CPC分类号： H04B1/7075 ,  H04B1/707 ,  H04B7/2668 ,  H04B2201/70701 ,  H04B2201/70702 ,  H04J11/0069 ,  H04W4/06 ,  H04W24/00 ,  H04W52/325 ,  H04W52/362 ,  H04W52/367 ,  H04W52/48 ,  H04W56/00 ,  H04W74/00

摘要： An improvement to a code-division-multiple-access (CDMA) system employing spread-spectrum modulation, with the CDMA system having a base station (BS) and a plurality of remote stations. The base station has a BS-spread-spectrum transmitter and a BS-spread-spectrum receiver. A remote station has an RS-spread-spectrum transmitter and an RS-spread-spectrum receiver. The BS transmitter transmits a broadcast common-synchronization channel, which includes a frame-timing signal. The broadcast common-synchronization channel has a common chip-sequence signal, which is common to the plurality of remote stations. In response to the RS-spread-spectrum receiver receiving the broadcast common-synchronization channel, and determining frame timing from the frame-timing signal, an RS-spread-spectrum transmitter transmits an access-burst signal. The access-burst signal includes a collision-detection portion. In response to the BS-spread-spectrum receiver receiving the access-burst signal, the BS-spread-spectrum transmitter transmits an collision-detection signal with the collision detection portion. In response to the BS-spread-spectrum receiver not receiving the access-burst signal due to a collision with a collision access-burst signal, the BS-spread-spectrum transmitter transmits an collision-detection signal without the correct collision detection portion.

摘要翻译： 对CDMA系统具有基站（BS）和多个远程站的采用扩频调制的码分多址（CDMA）系统的改进。 基站具有BS扩频发射机和BS扩频接收机。 远程站具有RS扩频发射机和RS扩频接收机。 BS发射机发送包括帧定时信号的广播公共同步信道。 广播共同同步信道具有公共芯片序列信号，这是多个远程站所共有的信号。 响应于接收广播公共同步信道的RS扩频接收机，并根据帧定时信号确定帧定时，RS扩频发射机发送接入突发信号。 接入突发信号包括冲突检测部分。 响应于接收到接入突发信号的BS扩频接收机，BS扩频发射机与冲突检测部分发送冲突检测信号。 响应于由于与冲突接入突发信号的冲突而没有接收到接入突发信号的BS扩频接收机，BS扩频发射机发送没有正确的冲突检测部分的冲突检测信号。