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    • 2. 发明申请
    • Use of orthogonal or near orthogonal codes in reverse link
    • 在反向链路中使用正交或近似正交码
    • US20050232140A1
    • 2005-10-20
    • US11152858
    • 2005-06-14
    • James ProctorPertti Alapuranen
    • James ProctorPertti Alapuranen
    • H04B1/707H04B1/7077H04J11/00H04J13/00H04J13/18H04Q7/38H04B7/216
    • H04J3/0635H04B1/707H04B1/7077H04J13/0022H04J13/18H04L7/043H04W72/0446
    • A technique for allowing a first and second group of users to share access to a communication channel such as a wireless radio channel is disclosed. The first group of users can be a group of legacy users such as those that use digital CDMA cellular telephone equipment based on the IS-95 standard. The second group of users can be a group of web surfers that code their transmissions using one of multiple formats. The first group of users can share one modulation structure such as, on a reverse link, using unique phase offsets of a common pseudorandom noise (PN) code. The second group of users can share another modulation structure, but in a manner that is consistent and compatible with the users of the first group. Specifically, the users of the second group may all use the same PN code and code phase offset. Each channel used by the second group of users can be uniquely identified by a corresponding unique orthogonal code.
    • 公开了一种用于允许第一组和第二组用户共享对诸如无线电频道之类的通信信道的接入的技术。 第一组用户可以是一组遗留用户,例如使用基于IS-95标准的数字CDMA蜂窝电话设备的用户。 第二组用户可以是一组网络冲浪者,可以使用多种格式之一对其传输进行编码。 第一组用户可以共享一个调制结构,例如在反向链路上,使用公共伪随机噪声(PN)码的唯一相位偏移。 第二组用户可以共享另一个调制结构,但是以与第一组的用户一致和兼容的方式。 具体来说,第二组的用户都可以使用相同的PN码和码相位偏移。 第二组用户使用的每个信道可以由相应的唯一正交码唯一地标识。
    • 8. 发明授权
    • Method and apparatus to maintain specification absorption rate at a wireless node
    • 保持无线节点规格吸收率的方法和装置
    • US07610027B2
    • 2009-10-27
    • US10319567
    • 2002-12-16
    • Pertti Alapuranen
    • Pertti Alapuranen
    • H04B1/04H04W52/30
    • H04W52/225H04B1/3838H04W4/02H04W24/00H04W52/28H04W52/367H04W80/02H04W84/18
    • A system and method for medium access control (MAC) protocol which controls transmissions in wireless devices to at least substantially comply with specific absorption rate (SAR) limits. The system and method of MAC protocol uses “source-based” time averaging measurements of transmitter “on-times” and an integral of transmission power to direct transmitter duty-cycle such that SAR limits are met. The system and method monitors and controls topology-dependent functions of a node transceiver, including transceiver duty cycle, transceiver transmit power levels and transceiver power-time products, using a automatic transmission control protocol (ATP) to vary functions to maintain specific absorption rate (SAR) limits for handheld and portable devices which are used close to human bodies. In cases in which SAR limits are approached, the ATP can direct the transceiver at the device to adjust each function, or combination of functions, to maintain an acceptable SAR limit.
    • 用于媒体访问控制(MAC)协议的系统和方法,其控制无线设备中的传输以至少基本符合特定吸收率(SAR)限制。 MAC协议的系统和方法使用发射机“接通时间”的“基于源”的时间平均测量,以及传输功率的积分以直接发射机占空比,使得满足SAR限制。 该系统和方法使用自动传输控制协议(ATP)来监视和控制节点收发器的拓扑相关功能,包括收发器占空比,收发器发射功率电平和收发器功率时间产品,以改变功能以维持比吸收率( SAR)对于靠近人体使用的手持和便携式设备的限制。 在接近SAR限制的情况下,ATP可以指示设备上的收发器来调整每个功能或功能的组合,以保持可接受的SAR限制。
    • 9. 发明申请
    • Method and apparatus for determining distances between wireless communication devices using low frequency signals
    • 用于确定使用低频信号的无线通信设备之间的距离的方法和装置
    • US20070155408A1
    • 2007-07-05
    • US11321414
    • 2005-12-29
    • John BelceaPertti Alapuranen
    • John BelceaPertti Alapuranen
    • H04Q7/20
    • G01S5/0205G01S5/0289H04W64/00
    • A wireless communication device (e.g., 102) employs a method and apparatus for determining distances between wireless communications devices in a wireless communication network (100). The wireless device receives an incoming message signal (117) from at least one other wireless device (e.g., 101, 103-104) in the network. The message signal(s) includes a time of arrival of a ranging signal (121) previously transmitted by the wireless device. Responsive to receiving the message signal(s), the wireless device receives one or more incoming ranging signal(s) (120) from the other wireless device(s). Each ranging signal is received in a frequency range that is substantially less than the frequency range in which the messaging signal(s) was received. Having received the message signal(s) and the ranging signal(s), the wireless device then determines the distance between itself and the other wireless device(s) based at least on receipt of the ranging signal(s) and, more preferably, further based on the contents of the message signal(s).
    • 无线通信设备(例如,102)采用用于确定无线通信网络(100)中的无线通信设备之间的距离的方法和装置。 无线设备从网络中的至少一个其他无线设备(例如,101,103-104)接收输入消息信号(117)。 消息信号包括先前由无线设备发送的测距信号(121)的到达时间。 响应于接收到消息信号,无线设备从其他无线设备接收一个或多个输入测距信号(120)。 在基本上小于接收到消息收发信号的频率范围的频率范围内接收每个测距信号。 在接收到消息信号和测距信号之后,无线设备至少基于接收到测距信号来确定自身与其它无线设备之间的距离,更优选地, 进一步基于消息信号的内容。