公开(公告)号：US20070021132A1

公开(公告)日：2007-01-25

申请号：US11185898

申请日：2005-07-21

Applicant: Xin Jin ,  Wen Zhao

Inventor： Xin Jin ,  Wen Zhao

IPC: H04B1/38 ,  H04B7/00 ,  H04Q7/20

CPC classification number: H04W4/10 ,  H04W68/02 ,  H04W76/45

Abstract: A push-to-talk (PTT) mobile station having a PTT ready mode, the mobile station having a controller adapted for executing computer program code; a memory connected to the controller for storing computer program code; computer program code stored in the memory and executable by the controller for operating the mobile station in the PTT ready mode selected from a plurality of PTT ready mode techniques, for establishing a PTT session; and a radio subsystem connected to the controller and the memory, the subsystem being configured for enabling the PTT mobile station to operate in the PTT ready mode for establishing one of the PTT session, PTT traffic, or both the PTT session and PTT traffic.

Abstract translation: 具有PTT就绪模式的即按即说（PTT）移动站，所述移动站具有适于执行计算机程序代码的控制器; 存储器，连接到控制器，用于存储计算机程序代码; 计算机程序代码，存储在存储器中并由控制器执行，用于在从多个PTT就绪模式技术中选择的PTT就绪模式中操作移动台，用于建立PTT会话; 以及连接到所述控制器和所述存储器的无线电子系统，所述子系统被配置为使所述PTT移动站能够在PTT就绪模式下操作，以建立PTT会话，PTT业务或PTT会话和PTT业务之一。

公开(公告)号：US07113538B1

公开(公告)日：2006-09-26

申请号：US09702768

申请日：2000-11-01

Applicant: Xixian Chen ,  Runbo Fu ,  Xin Jin

Inventor： Xixian Chen ,  Runbo Fu ,  Xin Jin

IPC: H04B1/707

CPC classification number: H04B1/70752 ,  H04B1/70735 ,  H04B1/7117

Abstract: Methods, searchers, base stations are provided which search for known codes contained in signals received over wireless channels, from mobile units for example. A coherent correlation is performed between an expected known code, and portions of the received signal during periods which are separated in time. Advantageously, by making the correlation periods separated in time, time diversity is realized such that if one or more of the correlation periods exist while the signal is of poorer quality, for example due to a fade, the remaining correlation periods may still yield a meaningful search statistic. Searching is done during time slots defined with reference to system time, not mobile unit time. Advantageously, this makes the searcher design simpler and more efficient. By performing time diversity searching in this manner, search tasks for one mobile unit(s) can be performed between the search task periods for another mobile unit resulting in a more efficient utilization of searcher resources.

Abstract translation: 提供方法，搜索者，基站，其例如从移动单元搜索包含在通过无线信道接收的信号中的已知代码。 在期望的已知码和在时间上分离的周期期间的接收信号的部分之间执行相干相关。 有利地，通过使相关时间在时间​​上分离，实现时间分集，使得如果在信号质量较差的情况下存在一个或多个相关周期，例如由于衰落，则剩余的相关周期仍然可以产生有意义的 搜索统计 参考系统时间而不是移动单位时间定义的时隙进行搜索。 有利地，这使搜索器设计更简单和更有效率。 通过以这种方式执行时间分集搜索，可以在用于另一移动单元的搜索任务周期之间执行一个移动单元的搜索任务，导致搜索者资源的更有效利用。

公开(公告)号：US20060104394A1

公开(公告)日：2006-05-18

申请号：US11116233

申请日：2005-04-28

Applicant: Wen-Yen Chan ,  Xin Jin ,  Qingzhong Jiao ,  Nasserullah Khan ,  Nagula Sangary

Inventor： Wen-Yen Chan ,  Xin Jin ,  Qingzhong Jiao ,  Nasserullah Khan ,  Nagula Sangary

IPC: H04L27/06

CPC classification number: H03L7/146 ,  H03J7/00 ,  H04L27/0014 ,  H04L2027/0046 ,  H04L2027/0053 ,  H04L2027/0079

Abstract: A communications subsystem for a wireless device for correcting errors in a reference frequency signal. The communications subsystem comprises a frequency generator for generating the reference frequency signal and a closed loop reference frequency correction module that generates a reference frequency adjustment signal for correcting the reference frequency signal when the communications subsystem operates in closed loop mode. The subsystem further includes an open loop frequency correction means that that samples values of the reference frequency adjustment signal during the closed loop mode and generates a frequency correction signal for correcting the reference frequency signal when the communications subsystem operates in a mode other than closed loop mode.

公开(公告)号：US20060003704A1

公开(公告)日：2006-01-05

申请号：US10883246

申请日：2004-06-30

Applicant: Xin Jin

Inventor： Xin Jin

IPC: H04B1/00 ,  H04B7/00

CPC classification number: H04B17/336

Abstract: One illustrative method of reducing signal interference in a wireless receiver includes receiving a radio frequency (RF) signal; amplifying the received RF signal with a gain G; producing a baseband signal from the amplified RF signal; producing a signal-to-interference (S/I) ratio from the baseband signal; and adjusting the gain G based on the S/I ratio. Preferably, the gain G is varied over a time period to produce a plurality of S/I ratios, so that the gain G corresponding a maximum S/I ratio produced over the time period can be selected for optimal performance. With this technique, higher accuracy is provided as intermodulation distortion is accounted for in the S/I ratio. Advantageously, the S/I ratio calculations and the gain adjustments are performed digitally by one or more processors such as a digital signal processor (DSP).

Abstract translation: 降低无线接收机中的信号干扰的一种说明性方法包括接收射频（RF）信号; 用增益G放大接收到的RF信号; 从放大的RF信号产生基带信号; 从基带信号产生信号干扰（S / I）比; 并根据S / I比调节增益G。 优选地，增益G在一段时间内变化以产生多个S / I比，使得可以选择对应于在该时间段内产生的最大S / I比的增益G用于最佳性能。 使用这种技术，提供了更高的精度，因为在S / I比中考虑到互调失真。 有利地，S / I比计算和增益调整由诸如数字信号处理器（DSP）的一个或多个处理器数字地执行。

公开(公告)号：US20050255893A1

公开(公告)日：2005-11-17

申请号：US10845876

申请日：2004-05-14

Applicant: Xin Jin ,  Muhammad Islam ,  Wen Zhao

Inventor： Xin Jin ,  Muhammad Islam ,  Wen Zhao

IPC: H04M1/00 ,  H04M1/73

CPC classification number: H04W52/0277 ,  H04W52/0229 ,  Y02D70/122 ,  Y02D70/144

Abstract: Methods and apparatus for expeditiously releasing network resources for a mobile station based on low battery and lost signal conditions are disclosed. The wireless network (104) receives a power down warning message from the mobile station (102) indicative of a low battery condition. The wireless network (104) then identifies whether a lost signal condition exists with the mobile station (102). In response to receiving the power down warning message and subsequently identifying the lost signal condition, the wireless network (104) causes network resources for the mobile station to be released. The wireless network (104) infers that the mobile station (102) has powered down due to low battery without enough time to send a power down registration to the wireless network (104).

Abstract translation: 公开了一种基于低电池和丢失信号条件快速释放移动台网络资源的方法和装置。 无线网络（104）从移动台（102）接收指示电池电量不足状况的断电警告消息。 然后，无线网络（104）识别移动台（102）是否存在丢失信号条件。 响应于接收到掉电警告消息并随后识别丢失信号条件，无线网络（104）使得移动站的网络资源被释放。 无线网络（104）推测移动站（102）由于电池电量不足而没有足够的时间向无线网络（104）发送掉电注册。

公开(公告)号：US06304561B1

公开(公告)日：2001-10-16

申请号：US08996996

申请日：1997-12-23

Applicant: Xin Jin ,  Hong-Kui Yang ,  John Nielsen ,  Neil McGowan ,  Jeff Stanier

Inventor： Xin Jin ,  Hong-Kui Yang ,  John Nielsen ,  Neil McGowan ,  Jeff Stanier

IPC: H04B7216

CPC classification number: H04B1/707

Abstract: The present invention relates to a method for effecting regulation of the effective noise figure of a CDMA (Code Division Multiple Access) receiver. The regulation process can be used to control the receiver during the activation/deactivation of a cell/sector in a CDMA wireless system and during normal operation when the service area of the cell/sector needs to enlarge or shrink. In a most preferred embodiment the CDMA receiver includes a source of pseudo-random noise that is injected in the received signal, downstream of the signal digitization stage. A power detector measures the power in the received digitized signal and a program logic determines the amount of noise figure degradation to be applied. The actual noise power regulation is effected by multiplying the output of the noise generator by a weighing factor. In a multi-channel CDMA system, each channel is provided with an independent system to regulate the effective noise power figure degradation, thus allowing to effect a noise figure regulation on a channel by channel basis.