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    • 1. 发明申请
    • Method and System for Verifying Performance of an Array by Simulating Operation of Edge Cells in a Full Array Model
    • 通过在全阵列模型中模拟边缘单元的操作来验证阵列性能的方法和系统
    • US20070245279A1
    • 2007-10-18
    • US11279312
    • 2006-04-11
    • Vikas AgarwalMichael Hyeok LeePhilip Shephard
    • Vikas AgarwalMichael Hyeok LeePhilip Shephard
    • G06F17/50
    • G06F17/5022
    • A method and system for verifying performance of an array by simulating operation of edge cells in a full array model reduces the computation time required for complete design verification. The edge cells of the array (or each subarray if the array is partitioned) are subjected to a timing simulation while the center cells of the array are logically disabled, but remain in the circuit model, providing proper loading. Additional cells are specified for simulation if calculations indicate a worst-case condition due to a non-edge cell. Wordline arrivals are observed to determine worst-case rows for selection. For write operations, the difference between the wordline edges and the data edges is used to locate any non-edge “outlier” cells. For read operations, the wordline delays are summed with the bitline delays determined from edge column data to locate any outliers.
    • 通过模拟全阵列模型中的边缘单元的操作来验证阵列的性能的方法和系统减少了完整设计验证所需的计算时间。 阵列的边缘单元(或阵列分割的每个子阵列)经受定时仿真,而阵列的中心单元在逻辑上被禁用,但保留在电路模型中,从而提供适当的加载。 如果计算指示由于非边缘单元造成的最坏情况,则指定额外的单元用于模拟。 观察到字线到达以确定最坏情况行进行选择。 对于写入操作,字边和数据边之间的差异用于定位任何非边缘“异常值”单元。 对于读取操作,字线延迟与从边沿列数据确定的位线延迟相加以定位任何异常值。
    • 3. 发明授权
    • Apparatus and method for frame synchronization in satellite communication system
    • 卫星通信系统中帧同步的装置和方法
    • US08537880B2
    • 2013-09-17
    • US13324351
    • 2011-12-13
    • Vikas AgarwalPan-Soo KimDeock-Gil Oh
    • Vikas AgarwalPan-Soo KimDeock-Gil Oh
    • H04W56/00
    • H04H40/90
    • Provided is a frame synchronization apparatus capable of reducing the amount of total computation and computation delays when a receiver of a satellite communication system calculates correlation between an input signal for frame synchronization and a signal sequence of the receiver, since the receiver uses no multiplier. The frame synchronization apparatus includes a correlator to obtain a correlation value of a unique word of a receiver with respect to a symbol data stream of a frame received from a transmitter of the satellite communication system, a comparator to compare the correlation value to a predetermined threshold value, and a determiner to determine whether the frame has been synchronized, based on the result of the comparison by the comparator.
    • 提供了一种帧同步装置,当卫星通信系统的接收机计算用于帧同步的输入信号与接收机的信号序列之间的相关性时,能够减少总计算量和计算延迟量,因为接收机不使用乘法器。 帧同步装置包括相关器,用于相对于从卫星通信系统的发射机接收到的帧的符号数据流获得接收机的唯一字的相关值;将相关值与预定阈值进行比较的比较器 值,以及基于比较器的比较结果来确定帧是否已被同步的确定器。