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公开(公告)号：US4953184A
公开(公告)日：1990-08-28
申请号：US359547
申请日：1989-06-01
Applicant: Daniel A. Simone
Inventor： Daniel A. Simone
CPC classification number: H03H17/0607 , H03H17/0226 , H03H17/0264
Abstract: An improved complex bandpass digital filter is disclosed. According to the invention, a complex bandpass digital filter having symmetric complex coefficients is implemented using a ROM look-up table. In operation, an input bit stream is latched at a desired decimation rate and the resulting latched bits are then used to address a ROM according to the following two-cycle process: First, the bits are applied in nomal order to the ROM to obtain the real (in phase) portion of the filter output. Second, the bits are bit-reversed and then applied to the same ROM to obtain the imaginary (quadrature) portion of the filter output. Thus, complex outputs are obtained as a time-multiplexed stream from one ROM, resulting in reduced ROM storage capacity requirements.
Abstract translation: 公开了一种改进的复带通数字滤波器。 根据本发明，使用ROM查找表来实现具有对称复系数的复带通数字滤波器。 在操作中，以期望的抽取率锁存输入比特流，然后根据以下两个周期的处理将所得到的锁存比特用于寻址ROM：首先，将这些比特以正常顺序应用于ROM以获得 滤波器输出的实数（同相）部分。 第二，这些位被比特反转，然后应用于相同的ROM以获得滤波器输出的虚数（正交）部分。 因此，作为来自一个ROM的时间多路复用流获得复数输出，导致ROM存储容量要求降低。
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公开(公告)号：US5802286A
公开(公告)日：1998-09-01
申请号：US447066
申请日：1995-05-22
Applicant: Judy Y. Dere , Leon Y. K. Leong , Daniel A. Simone , Allan Thomson
Inventor： Judy Y. Dere , Leon Y. K. Leong , Daniel A. Simone , Allan Thomson
CPC classification number: H04L41/0889 , H04L41/0823 , H04L41/12 , H04Q11/0478 , H04L2012/5626 , H04L41/0826
Abstract: A method of configuring a network. The network includes some physical devices, some hosts, and a network management tool. The method comprises the following steps. First, generate a set of leaf nodes. Each leaf node includes at least one physical device and connects to at least one host. Next, generate an adjacency matrix from said set of leaf nodes. Next, generate a set of interconnect nodes, the interconnect nodes connect the set of leaf nodes. Next, determine the resource availability for the set of interconnect nodes. Finally, configure the set of interconnect nodes and the set of leaf nodes after determining that sufficient resources are available.
Abstract translation: 一种配置网络的方法。 该网络包括一些物理设备，一些主机和一个网络管理工具。 该方法包括以下步骤。 首先生成一组叶节点。 每个叶节点包括至少一个物理设备并且连接到至少一个主机。 接下来，从所述叶节点集合生成邻接矩阵。 接下来，生成一组互连节点，互连节点连接一组叶节点。 接下来，确定该组互连节点的资源可用性。 最后，在确定有足够的资源可用后，配置互连节点集和叶节点集合。
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公开(公告)号：US4733403A
公开(公告)日：1988-03-22
申请号：US861958
申请日：1986-05-12
Applicant: Daniel A. Simone
Inventor： Daniel A. Simone
CPC classification number: H03D3/007 , H03D2200/0056 , H03D2200/006 , H03D2200/009 , H03D2200/0092 , H03D3/006 , H03D7/165
Abstract: Disclosed is a digital zero-IF selectivity section circuit which operates on a recovered input signal, digitally clocked by a first clock at a rate of FS, in receiver device. The circuit uses a second clock operating at a lesser rate than the first clock to clock an N-order FIR digital filtering means to selectively band-limit the frequency spectrum of the recovered input signal. A second digital filtering means is coupled to the output of the first FIR digital filtering means. The second digital filtering means operates at a clock speed less than or equal to the second clock speed. The second digital filtering means is used to further selectively band-limit the frequency spectrum of the recovered input signal.
Abstract translation: 公开了一种数字零中频选择部分电路，其在接收机设备中以恢复的输入信号进行操作，该恢复的输入信号由FS的速率由第一时钟数字地计时。 电路使用以比第一时钟更低的速率操作的第二时钟来对N阶FIR数字滤波装置进行时钟以选择性地限制所恢复的输入信号的频谱。 第二数字滤波装置耦合到第一FIR数字滤波装置的输出端。 第二数字滤波装置以小于或等于第二时钟速度的时钟速度工作。 第二数字滤波装置用于进一步选择性地限制所恢复的输入信号的频谱。
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公开(公告)号：US06370142B1
公开(公告)日：2002-04-09
申请号：US08832042
申请日：1997-04-02
Applicant: Derek Pitcher , Kishore K. Seshadri , Daniel A. Simone
Inventor： Derek Pitcher , Kishore K. Seshadri , Daniel A. Simone
IPC: H04L1228
CPC classification number: H04L12/5601 , H04L49/104 , H04L49/256 , H04L49/309 , H04L49/351 , H04Q11/0478
Abstract: A method and apparatus for performing per-port Internet Protocol (IP) multicast pruning, proxying of IP multicast group membership reports, and generating pseudo membership queries for determining IP multicast group membership are provided. A switch may implement per-port IP multicast pruning by establishing a mapping of IP multicast groups to its ports. The mapping is based upon membership reports received from each end-station participating in an IP multicast group. Based upon the mapping, the switch forwards IP multicast packets only to those of the end-stations that are participating in the IP multicast group addressed. Once per-port IP multicast pruning is implemented, multicast routers must process membership reports from all end-stations participating in an IP multicast group. To reduce this burden, a switch may act as a proxy device. The switch receives a membership report identifying an IP multicast group. If the membership report is the first received for the IP multicast group after a membership query, then the switch forwards the membership report. However, if the membership report is not the first received, then the switch discards the membership report. To allow IP multicast group membership determination when no querier is present, a switch determines if another device is currently acting as a querier for a switched network. If not, the switch sends a membership query on one or more of its ports. Responsive to the membership query, an end-station transmits a membership report to the switch. The switch records the IP multicast group membership indicated in the membership report.
Abstract translation: 提供了一种用于执行每端口因特网协议（IP）组播剪枝的方法和装置，IP组播组成员报告的代理，以及生成用于确定IP组播组成员资格的伪成员查询。 交换机可以通过建立IP组播组到其端口的映射来实现每端口IP组播剪枝。 该映射基于从参与IP多播组的每个终端站接收的成员资格报告。 基于映射，交换机将IP组播数据包转发到正在参与IP组播组寻址的终端站。 一旦实现了每端口IP组播修剪，组播路由器必须处理参与IP组播组的所有终端的成员关系报告。 为了减轻这种负担，交换机可以用作代理设备。 交换机收到标识IP组播组的成员资格报告。 如果成员资格报告是成员查询后首次收到的IP组播组，则交换机转发成员资格报告。 但是，如果成员资格报告不是首次收到，则交换机将丢弃成员资格报告。 为了在不存在查询器的情况下允许IP组播组成员确定，交换机确定另一个设备当前是否作为交换网络的查询器。 如果没有，交换机会在其一个或多个端口上发送成员资格查询。 响应于成员查询，终端向交换机发送成员资格报告。 交换机记录会员报告中指定的IP组播组成员。
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