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    • 1. 发明授权
    • Authenticating between a CDMA network and a GSM network
    • 在CDMA网络和GSM网络之间进行认证
    • US07539491B2
    • 2009-05-26
    • US10804301
    • 2004-03-18
    • Nikhil JainBruce Collins
    • Nikhil JainBruce Collins
    • H04B1/38
    • H04W12/06H04W12/04H04W84/042H04W88/16H04W92/02H04W92/24
    • A general global gateway (GGG) permits authenticating between a CDMA network and a GSM network such that a mobile station having a subscription in a GSM network can roam into a CDMA network and be authenticated to use the CDMA network. The GGG obtains authentication parameters from the mobile station and determines whether the authentication parameters satisfy GGG authentication criteria. During the authentication process, the mobile station is placed in “SMS only” status until authorized by the GGG. Checks are made during the authentication process to assure the GGG and mobile station agree on the number of GSM network accesses and to assure the mobile station is authorized for GSM access for a time period.
    • 通用全球网关(GGG)允许在CDMA网络和GSM网络之间进行认证,使得具有在GSM网络中的订阅的移动台可以漫游到CDMA网络并被认证以使用CDMA网络。 GGG从移动台获取认证参数,并确定认证参数是否满足GGG认证标准。 在认证过程中,移动台被置于“仅SMS”状态,直到GGG授权。 在认证过程中进行检查,以确保GGG和移动台达成GSM网络接入的数量,并确保移动台在一段时间内被授权进行GSM接入。
    • 10. 发明授权
    • System for compensating for I/Q impairments in wireless communication system
    • 用于补偿无线通信系统中I / Q损伤的系统
    • US09088472B1
    • 2015-07-21
    • US14591930
    • 2015-01-08
    • Nikhil JainArvind KaushikPeter Z. RashevAmrit P. Singh
    • Nikhil JainArvind KaushikPeter Z. RashevAmrit P. Singh
    • H04L25/49H04L27/36H03F1/32
    • H04L27/364H03F1/3247H03F3/24H04L27/368H04L27/3863
    • A system for reducing in-phase and quadrature-phase (I/Q) impairments includes first, second, third, and fourth programmable registers for storing respective first, second, third, and fourth values, first and second finite impulse response (FIR) filters having respective first and second sets of filter taps, and first and second adders. The first FIR filter receives an I input signal and generates first and second intermediate output signals based on the first and second values for I and Q channels, respectively. The second FIR filter receives a Q input signal and generates third and fourth intermediate output signals based on the third and fourth values for the I and Q channels, respectively. The first and second adders receive the first and second, and the third and fourth intermediate output signals, respectively, and generate compensated I and Q output signals for the I and Q channels.
    • 用于减小同相和正交相位(I / Q)损伤的系统包括用于存储相应的第一,第二,第三和第四值的第一,第二,第三和第四可编程寄存器,第一和第二有限脉冲响应(FIR) 滤波器具有相应的第一和第二组滤波器抽头,以及第一和第二加法器。 第一FIR滤波器接收I输入信号,并且基于I和Q通道的第一和第二值分别产生第一和第二中间输出信号。 第二FIR滤波器接收Q输入信号,并且分别基于I和Q通道的第三和第四值产生第三和第四中间输出信号。 第一和第二加法器分别接收第一和第二以及第三和第四中间输出信号,并产生用于I和Q通道的补偿的I和Q输出信号。