公开(公告)号：US08059707B1

公开(公告)日：2011-11-15

申请号：US12825738

申请日：2010-06-29

申请人： Yungping Hsu ,  Nelson Xu ,  Ricky Cheung

发明人： Yungping Hsu ,  Nelson Xu ,  Ricky Cheung

IPC分类号： H03H7/34 ,  H03K5/159

CPC分类号： H04L25/03057 ,  H04L2025/03401 ,  H04L2025/0349

摘要： A decoding unit for decoding a modulated signal includes a summing unit having i) a first input, ii) a second input, and iii) an output. The summing unit is configured to i) receive the modulated signal at the first input, ii) receive a feedback signal at the second input, and iii) output a first waveform based on the modulated signal and the feedback signal. A demodulation unit has a first demodulation pathway and a second demodulation pathway. The demodulation unit is configured to i) select between the first demodulation pathway and the second demodulation pathway, ii) receive and demodulate the modulated signal with the first demodulation pathway, and iii) receive and demodulate the first waveform with the second demodulation pathway. The remodulation unit is configured to selectively i) output a first complex waveform based on the modulated signal, and ii) output a subsymbol waveform of the first waveform.

摘要翻译： 用于对调制信号进行解码的解码单元包括具有i）第一输入的加法单元，ii）第二输入，以及iii）输出。 求和单元被配置为i）在第一输入处接收调制信号，ii）在第二输入处接收反馈信号，以及iii）基于调制信号和反馈信号输出第一波形。 解调单元具有第一解调路径和第二解调路径。 所述解调单元被配置为i）在所述第一解调路径和所述第二解调路径之间进行选择，ii）利用所述第一解调路径来接收和解调所述调制信号，以及iii）利用所述第二解调路径来接收和解调所述第一波形。 再调制单元被配置为选择性地i）基于调制信号输出第一复数波形，以及ii）输出第一波形的子符号波形。

公开(公告)号：US07970079B1

公开(公告)日：2011-06-28

申请号：US12437090

申请日：2009-05-07

申请人： Yungping Hsu

发明人： Yungping Hsu

IPC分类号： H04L27/22

CPC分类号： H04L27/0008 ,  H04L25/08 ,  H04L27/20 ,  H04L27/22

摘要： A network device includes a first demodulation path to recover a header portion of a data packet. A second demodulation path recovers a payload portion of the data packet. The second demodulation path includes a down sampler to down sample a payload portion of the data packet. An equalizer equalizes an output of the down sampler. A correlator receives an output of the equalizer. A demodulation controller selects the output of the equalizer or an output of the correlator based on the header portion.

摘要翻译： 网络设备包括用于恢复数据分组的报头部分的第一解调路径。 第二解调路径恢复数据分组的有效载荷部分。 第二解调路径包括下采样器以对数据分组的有效载荷部分进行下采样。 均衡器对下采样器的输出进行均衡。 相关器接收均衡器的输出。 解调控制器基于头部分选择均衡器的输出或相关器的输出。

公开(公告)号：US07864871B1

公开(公告)日：2011-01-04

申请号：US11805634

申请日：2007-05-24

申请人： Yungping Hsu ,  Lawrence Tse

发明人： Yungping Hsu ,  Lawrence Tse

IPC分类号： H04L27/00

CPC分类号： H04B1/26

摘要： A system comprises a circuit that stores a first value and M parallel signal lines that communicate with the circuit, where M is an integer greater than three. A difference controller that receives the first value via the M parallel signal lines, that compares the first value to a first reference value, and that generates control signals based on a difference between the first value and the first reference value. An accumulator circuit that communicates with N signal lines, that stores a second reference value and that performs one of increment and decrement function to adjust the second reference value based on the control signals, where N is less than or equal to three.

摘要翻译： 系统包括存储与电路通信的第一值和M个并行信号线的电路，其中M是大于3的整数。 差分控制器，其通过M个并行信号线接收第一值，该M个并行信号线将第一值与第一参考值进行比较，并且基于第一值和第一参考值之间的差产生控制信号。 与N个信号线进行通信的累加器电路，其存储第二参考值，并且其中N小于或等于3，所述累加器电路基于所述控制信号来执行增量和递减函数中的一个以调整所述第二参考值。

公开(公告)号：US07403539B1

公开(公告)日：2008-07-22

申请号：US10268156

申请日：2002-10-09

申请人： Hsiao-Cheng Tang ,  Yungping Hsu ,  Guorong Hu ,  Weishi Feng

发明人： Hsiao-Cheng Tang ,  Yungping Hsu ,  Guorong Hu ,  Weishi Feng

IPC分类号： H04L12/413 ,  H04L12/28

CPC分类号： H04B17/00 ,  H04B1/707 ,  H04W24/00 ,  H04W74/08

摘要： Techniques for and apparatus capable of implementing packet detection and signal recognition in wireless communications systems are disclosed. In particular, the disclosed techniques and apparatus incorporate at least one of relative energy detection operable on assessment of a relative energy threshold for an inbound signal borne across an RF channel, carrier sense operable upon on assessment of at least one of a peak-to-sidelobe ratio and peak-to-peak distance defined by the inbound signal, and comparison operable upon demodulated data corresponding to the inbound signal as compared to predetermined preamble data. Clear channel assessment is performed based on determinations undertaken by one or more of the aforementioned relative energy detection, carrier sense and comparison operations.

摘要翻译： 公开了能够在无线通信系统中实现分组检测和信号识别的技术和装置。 具体地，所公开的技术和装置包括相对能量检测中的至少一个，其可操作用于对横跨RF信道承载的入站信号的相对能量阈值的评估，所述载波检测可在通过评估峰 - 旁瓣比和由峰值到峰值的距离，并且与对应于入站信号的解调数据进行比较，与预定的前导码数据相比较。 基于由上述相对能量检测，载波检测和比较操作中的一个或多个进行的确定来执行清除信道评估。

公开(公告)号：US20080084835A1

公开(公告)日：2008-04-10

申请号：US11866754

申请日：2007-10-03

申请人： Sandesh Goel ,  Timothy Donovan ,  Ken Ho ,  Yungping Hsu ,  Kedar Shirali ,  Atul Salhotra ,  Tam Tran ,  Chia-Chun Chung

发明人： Sandesh Goel ,  Timothy Donovan ,  Ken Ho ,  Yungping Hsu ,  Kedar Shirali ,  Atul Salhotra ,  Tam Tran ,  Chia-Chun Chung

IPC分类号： H04B7/00 ,  H04Q7/20

CPC分类号： H04W72/04 ,  H04W74/0808

摘要： A system includes a signal processing module and a control module. The signal processing module receives a first clear channel assessment (CCA) signal for a first sub-channel of a communication channel, increases a pulse width of the first CCA signal by a predetermined period of time, and generates a second CCA signal. The control module receives the second CCA signal and a third CCA signal for a second sub-channel of the communication channel. The control module transmits data via one of the second sub-channel and the communication channel based on the second and third CCA signals.

摘要翻译： 系统包括信号处理模块和控制模块。 信号处理模块接收通信信道的第一子信道的第一清除信道评估（CCA）信号，将第一CCA信号的脉冲宽度增加预定时间段，并产生第二CCA信号。 控制模块接收第二CCA信号和用于通信信道的第二子信道的第三CCA信号。 控制模块基于第二和第三CCA信号，经由第二子信道和通信信道中的一个发送数据。

公开(公告)号：US07230988B1

公开(公告)日：2007-06-12

申请号：US10214525

申请日：2002-08-07

申请人： Yungping Hsu ,  Lawrence Tse

发明人： Yungping Hsu ,  Lawrence Tse

IPC分类号： H04L27/00

CPC分类号： H04B1/26

摘要： Method and apparatus for communicating numeric data between first and second circuits incorporating a controller communicatively coupled to the first circuit to receive the numeric data, and an accumulator communicatively coupled to the second circuit and the controller, the accumulator comprising accumulator logic managing reference data, the controller being responsive to the numeric data selectively causing the accumulator logic to increment or decrement the reference data to match the numeric data. The accumulator will notify the second circuit of the so-updated reference data. In one embodiment, three signal lines (UP, DN, CLK) are used by the controller to direct the accumulator to increment, decrement, reset or hold the reference data. In another embodiment, only two signal lines are used at the expense of reset complexity.

摘要翻译： 用于在包含通信地耦合到第一电路以接收数字数据的控制器的第一和第二电路之间传送数字数据的方法和装置，以及通信地耦合到第二电路和控制器的累加器，所述累加器包括管理参考数据的累加器逻辑， 控制器响应数字数据选择性地使累加器逻辑增加或减少参考数据以匹配数字数据。 累加器将通知第二个电路如此更新的参考数据。 在一个实施例中，控制器使用三条信号线（UP，DN，CLK）来引导累加器递增，递减，复位或保持参考数据。 在另一个实施例中，以复位复杂度为代价仅使用两条信号线。

公开(公告)号：US07106803B1

公开(公告)日：2006-09-12

申请号：US10183814

申请日：2002-06-26

申请人： Yungping Hsu

发明人： Yungping Hsu

IPC分类号： H04L27/18

CPC分类号： H04L27/0008 ,  H04L25/08 ,  H04L27/20 ,  H04L27/22

摘要： Method and apparatus for high speed wireless transmission involving selective PSK coding techniques are disclosed. In particular, to enhance effective throughput while maintaining a channel footprint backwards compatible with existing IEEE 802.11 and 802.11b (1999) standards, the payload of outbound data packets are selectively modulated using DQPSK techniques at the CCK symbol chipping rate. This results in a 22 Mbps effective throughput, a 2× improvement over the 802.11b standard. A complementary receiver includes a DQPSK demodulation pathway suitable for decoding inbound data packets at the 11 MHz CCK chipping rate but bypassing the conventional CCK encoder, resulting in a 22 Mbps data stream. Backwards compatibility with legacy 802.11 and 802.11b devices is partially accommodated using a data packet format similar to the conventional PLCP frame format but for the data transmission rate and use of heretofore reserved bits, causing legacy devices to ignore such packets.

摘要翻译： 公开了涉及选择性PSK编码技术的用于高速无线传输的方法和装置。 特别地，为了在保持与现有的IEEE 802.11和802.11b（1999）标准向后兼容的信道封装的同时增强有效吞吐量，出站数据分组的有效负载以CCK符号切换速率的DQPSK技术进行选择性调制。 这导致22 Mbps有效吞吐量，比802.11b标准提高了2倍。 互补接收机包括适于以11MHz CCK码片速率解码入站数据分组但绕过常规CCK编码器的DQPSK解调路径，导致22Mbps数据流。 与传统802.11和802.11b设备的向后兼容性使用类似于常规PLCP帧格式的数据分组格式部分地适应，但是对于数据传输速率和迄今为止的保留比特的使用，导致传统设备忽略这样的分组。

公开(公告)号：US06804695B1

公开(公告)日：2004-10-12

申请号：US09717240

申请日：2000-11-22

申请人： Yungping Hsu

发明人： Yungping Hsu

IPC分类号： G06F1710

CPC分类号： H03H21/0067 ,  H03H21/0012

摘要： Method and apparatus for constraining tap coefficients in an adaptive Finite Impulse Response filter includes structure and steps whereby a coefficient supply circuit provides at least two even tap coefficients and at least two odd tap coefficients to the adaptive Finite Impulse Response filter. Constraint circuitry then selectively constrains changes in the values of at least one of (i) the two even tap coefficients and (ii) the two odd tap coefficients. Preferably, the Finite Impulse Response filter has taps C0, C1, C2, C3, C4, C5, and C6. A coefficient supplier is coupled to provide coefficients to said taps, and an adaptive circuit changes the coefficients supplied by said coefficient supplier in accordance with changes in an output of the Finite Impulse Response filter. The adaptive circuit includes circuitry to constrain allowable change in both the even tap coefficients C0, C2, C4, C6 and in the odd tap coefficients C1, C3, C5.

摘要翻译： 在自适应有限脉冲响应滤波器中约束抽头系数的方法和装置包括结构和步骤，由此系数提供电路向自适应有限脉冲响应滤波器提供至少两个偶数抽头系数和至少两个奇数抽头系数。 约束电路然后选择性地限制（i）两个偶次抽头系数和（ii）两个奇数抽头系数中的至少一个的值的变化。 优选地，有限脉冲响应滤波器具有抽头C0，C1，C2，C3，C4，C5和C6。 耦合系数提供器以向所述抽头提供系数，并且自适应电路根据有限脉冲响应滤波器的输出的变化来改变由所述系数提供器提供的系数。 自适应电路包括限制偶数抽头系数C0，C2，C4，C6以及奇数抽头系数C1，C3，C5两者中容许变化的电路。