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    • 11. 发明申请
    • BASEBAND RECOVERY IN WIRELESS NETWORKS, BASE TRANSCEIVER STATIONS, AND WIRELESS NETWORKING DEVICES
    • 无线网络中的基带恢复,基站收发站和无线网络设备
    • WO2010071977A1
    • 2010-07-01
    • PCT/CA2009/001673
    • 2009-11-19
    • NORTEL NETWORKS LIMITEDKUECHLER, Tim
    • KUECHLER, Tim
    • H04W28/06H04L27/18H04W56/00
    • H04W80/04H04L1/205H04L7/0029H04L7/0062H04L7/007H04L7/04H04L25/067
    • Baseband recovery in wireless networks, base transceiver stations, and wireless networking devices may be implemented to minimize the number of timing symbols while at the same time enabling wireless devices to use a relatively low per-symbol sampling rate, so that minimal processing is required to implement the timing recovery. In one embodiment, a relatively low number of samples is taken per expected symbol interval during the training sequence. A subset of the samples is selected and processed to determine error signals for each of the samples. The error signals are multiplied by the expected symbol and summed to form an error signal. The error signal is used to adjust the set of samples that will be used and processed in connection with subsequent symbols. The error signal is also used to interpolate between available samples to infinitesimally approach the point of maximum eye opening.
    • 可以实现无线网络,基站收发器和无线网络设备中的基带恢复以最小化定时符号的数量,同时使无线设备能够使用相对较低的每符号采样率,从而需要最少的处理 实现定时恢复。 在一个实施例中,在训练序列期间,每个预期符号间隔采取相对较少数量的采样。 选择并处理样本的子集以确定每个样本的误差信号。 误差信号乘以预期符号并相加以形成误差信号。 误差信号用于调整将与后续符号相关联使用和处理的样本集。 误差信号也用于在可用样本之间进行插值,无限次地接近最大眼睛开度点。
    • 18. 发明申请
    • COMMUNICATION SYSTEM FOR SENDING AND RECEIVING DATA ONTO AND FROM A NETWORK AT A NETWORK FRAME RATE USING A PHASE LOCKED LOOP, SAMPLE RATE CONVERSION, OR SYNCHRONIZING CLOCKS GENERATED FROM THE NETWORK FRAME RATE
    • 用于使用相位锁定环路,采样速率转换或同步网络帧速率产生的时钟在网络帧上传送和从网络接收数据的通信系统
    • WO2004017544A2
    • 2004-02-26
    • PCT/US0325182
    • 2003-08-12
    • OASIS SILICON SYSTEMS
    • KNAPP DAVID JAKKIHAL SHIVANAND IMADDOX JOHN GGAALAAS JOSEPH BWINKELMANN MATTHIAS
    • H04L12/56H04J3/06
    • H04J3/0647H04L7/0029
    • A communication system, source and destination ports of the communication system, and methodology is provided for transporting data in one of possibly three different ways. Data is transported across the network at a frame sample rate that can be the same as or different from the sample rate or master clock within the source port or the destination port. If the sample rate of the source port is known, the sample rate of the destination port can be created using a PLL within the destination port and simply employing a phase comparator in the source port. The phase comparator forwards the phase or frequency difference of the network transfer rate and the source sample rate to the destination port, which then generates a local clock equivalent to the source which then compiles audio data being played at the same rate in which it was sampled at the source. Where economically feasible, sample rate conversion can be used at the source. However, sample rate conversion at the destination is preferred if the source sample rate is forwarded across the network relative to the frame transfer rate of the synchronous network. The sample rate converter simply produces a play rate from the transmitted information at the destination. Again, however, sample rate conversion compares relative phase difference changes similar to the phase difference compared in the digital PLL mode. As a further alternative, sample rates within the source and destination ports can be derived from the network frame rate using fractional dividers in the source and destination ports.
    • 提供通信系统,通信系统的源和目的地端口和方法,用于以可能三种不同的方式之一传输数据。 数据以与采样率或源端口或目标端口内的主时钟相同或不同的帧采样率在网络上传输。 如果源端口的采样率是已知的,则可以使用目的端口内的PLL创建目标端口的采样率,并且仅在源端口中使用相位比较器。 相位比较器将网络传输速率和源采样率的相位或频率差转发到目的地端口,该目的端口然后生成等效于源的本地时钟,然后源以与之相同的速率编译正在播放的音频数据 在源头。 在经济上可行的情况下,采样率转换可以在源头使用。 然而,如果源采样率相对于同步网络的帧传输速率在网络上转发,则优选目的地的采样率转换。 采样率转换器简单地从目的地的发送信息产生播放速率。 然而,再次,采样率转换比较类似于在数字PLL模式下比较的相位差的相对相位差变化。 作为另一个替代方案,源端口和目的端口中的采样率可以使用源端口和目的端口中的分数分频器从网络帧速率导出。
    • 19. 发明申请
    • CODE TRACKING LOOP WITH AUTOMATIC POWER NORMALIZATION
    • 具有自动电源正常化的代码跟踪环路
    • WO2003030389A1
    • 2003-04-10
    • PCT/US2002/011504
    • 2002-04-15
    • INTERDIGITAL TECHNOLOGY CORPORATION
    • BULTAN, AykutGRIECO, Donald
    • H04B1/707
    • H04B1/7085H04B1/709H04L7/0029
    • The UE is in communication with one of the plurality of base stations and receives a communication signal from the base station through the CDMA receiver. The communication signal is correlated by said receiver using a delay locked code tracking loop (10), that estimates and tracks a channel delay of the communication signal. The tracking loop comprises a reference code generator (16) for generating a reference code signal and an interpolator (11) for generating timed signal versions in response to the receipt of said communication. A timed signal correlator (12a, 12b, 13a; 13b), also included in the tracking loop for correlating at least two of the timed signal versions with the code reference signal. The result of the correlation is used for generating an error signal. An automatic power normalization loop (APN), that is responsive to the interpolator (11), generates a power error signal that normalizes the error signal through a normalization circuit (14).
    • UE与多个基站之一进行通信,并通过CDMA接收机从基站接收通信信号。 通信信号由所述接收机使用延迟锁定码跟踪环路(10)相关,延迟锁定码跟踪环路(10)估计和跟踪通信信号的信道延迟。 跟踪环包括用于产生参考码信号的参考码发生器(16)和用于响应于所述通信的接收而产生定时信号版本的内插器(11)。 定时信号相关器(12a,12b,13a; 13b)也包括在用于使至少两个定时信号版本与代码参考信号相关的跟踪环路中。 相关的结果用于产生误差信号。 响应于内插器(11)的自动功率归一化回路(APN)产生通过归一化电路(14)对误差信号进行归一化的功率误差信号。