会员体验
专利管家(专利管理)
工作空间(专利管理)
风险监控(情报监控)
数据分析(专利分析)
侵权分析(诉讼无效)
联系我们
交流群
官方交流:
QQ群: 891211   
微信请扫码    >>>
现在联系顾问~
热词
    • 3. 发明申请
    • METHOD AND APPARATUS FOR USING FULL SPECTRUM TRANSMITTED POWER IN A SPREAD SPECTRUM COMMUNICATION SYSTEM FOR TRACKING INDIVIDUAL RECIPIENT PHASE TIME AND ENERGY
    • 在传播频谱通信系统中使用全频谱发射功率跟踪个体接收时间和能量的方法和装置
    • WO9622661A2
    • 1996-07-25
    • PCT/US9600141
    • 1996-01-03
    • QUALCOMM INC
    • ZEHAVI EPHRAIMCARTER STEPHEN SGILHOUSEN KLEIN S
    • H04B1/04H04B1/7075H04B1/7085H04B1/7087H04B1/7117H04B7/216H04Q7/00
    • H04B1/7085H04B1/70753H04B1/7087H04B1/7117H04B7/216
    • Method and apparatus for tracking the frequency and phase of signals in spread spectrum communication systems that makes more efficient use of available carrier frequency and phase information by utilizing a substantial portion or all of the energy occupying the frequency spectrum of a received carrier signal, including energy from communication signals intended for other system users. Multiple spread spectrum communication signals (182) are input in parallel to data receivers (126 A'-N') where they are despread using preselected despreading codes at an adjustable phase angle and decoded over multiple orthogonal codes active within the communication system. Multiple decoded signals are then combined (188) to form a single phase detection signal which is used by at least one tracking loop (184) to track frequency and phase of the carrier signal for the received communication signals. The tracking loop (184) generates a timing signal which is used to adjust the phase angle (186) used during despreading. In further embodiments, the communication signals are despread using appropriate PN codes and separated into in-phase (I) and quadrature channels (Q) (214) where data symbols are processed by fast Hadamard transformers (218, 220) to generate corresponding data bits. The data is formed into pairwise products between the channels (224), and summed over multiple or all active subscriber orthogonal codes (226). This sum indicates a degree to which the estimated phase differs from the actual phase of received communication signals and is used to adjust the phase of application for the PN codes (230).
    • 用于跟踪扩频通信系统中的信号的频率和相位的方法和装置,其通过利用占据所接收的载波信号的频谱(包括能量)的大部分或全部能量来更有效地利用可用的载波频率和相位信息 来自其他系统用户的通信信号。 多个扩频通信信号(182)并行地输入到数据接收器(126A'-N'),在数据接收器(126A'-N')处,它们以可调节相位角的预选去扩展码进行解扩,并在通信系统内有效的多个正交码进行解码。 然后组合多个解码信号(188)以形成单相检测信号,该相位检测信号由至少一个跟踪环路(184)用于跟踪所接收的通信信号的载波信号的频率和相位。 跟踪环路(184)产生定时信号,该定时信号用于调整在解扩过程中使用的相位角(186)。 在另外的实施例中,使用合适的PN码对通信信号进行解扩,并将其分离成同相(I)和正交信道(Q)(214),其中数据符号被快速哈达马德变换器(218,220)处理以产生相应的数据位 。 数据被形成在信道(224)之间的成对产物中,并且在多个或所有活动用户正交码(226)上相加。 该和指示估计相位与接收的通信信号的实际相位不同的程度,并且用于调整PN码的应用阶段(230)。