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1. 发明授权

US09300021B2 Millimetre wave bandpass filter on CMOS 有权
标题翻译： CMOS上的毫米波带通滤波器
公开(公告)号：US09300021B2
公开(公告)日：2016-03-29
申请号：US13120214
申请日：2008-09-23
申请人： Bo Yang , Stan Skafidas , Robin Evans
发明人： Bo Yang , Stan Skafidas , Robin Evans
IPC分类号： H01P1/203 , H01P7/08
CPC分类号： H01P1/20372 , H01P1/20336 , H01P7/08 , Y10T29/49117
摘要： Q of resonant elements formed over lossy substrates such as in a CMOS process is improved by forming the ground plane of the resonant element immediately over a high impedance layer to reduce cross coupling and eddy currents. A new type of meandering hairpin resonator configuration is also introduced providing, for example, for 4th order cross coupled filters of high selectivity and compact layout.
摘要翻译：通过在高阻抗层上形成谐振元件的接地平面以减少交叉耦合和涡流来改善在诸如CMOS工艺的有损基板上形成的谐振元件的Q。还引入了一种新型的曲折发夹谐振器配置，其提供例如高选择性和紧凑布局的四阶交叉耦合滤波器。

2. 发明授权

US09257751B2 Integration of microstrip antenna with CMOS transceiver 有权
标题翻译：微带天线与CMOS收发器的集成
公开(公告)号：US09257751B2
公开(公告)日：2016-02-09
申请号：US12920053
申请日：2009-03-13
申请人： Gordana Felic , Stan Skafidas
发明人： Gordana Felic , Stan Skafidas
IPC分类号： H01Q9/04 , H01Q1/50 , H01P11/00 , H01Q23/00
CPC分类号： H01Q9/045 , H01Q23/00 , Y10T29/49018
摘要： A monolithic antenna element comprises a microstrip patch antenna and a ground plane, with a substrate between the patch antenna and the ground plane. A feeding via extends from the ground plane layer through the substrate to the patch antenna, connecting to the antenna distal from lateral edges of the antenna. A coplanar waveguide (CPW) feed line is formed in the ground plane layer, and interrupts and is electrically distinct from the ground plane. The CPW extends from a lateral edge of the ground layer to the feeding via. The antenna can be flip chip bonded to a CMOS die, reducing cost of millimeter wave transceivers, e.g. 57-64 GHz. The antenna is fabricated using standard PCB technology and a single substrate for the antenna. Antenna arrays can be fabricated. Appropriately designed antenna feeds, flip chip interconnects and antenna shape provide suitably broad antenna bandwidth, with relatively high efficiency.
摘要翻译：单片天线元件包括微带贴片天线和接地平面，在贴片天线和接地平面之间具有衬底。馈电通道从接地平面层穿过衬底延伸到贴片天线，连接到远离天线侧边缘的天线。共面波导（CPW）馈线形成在接地层中，中断并与地平面电气不同。 CPW从接地层的侧边缘延伸到馈送通道。天线可以倒装芯片连接到CMOS芯片，降低了毫米波收发器的成本，例如。 57-64 GHz。天线采用标准PCB技术制造，单个天线用于天线。可以制造天线阵列。适当设计的天线馈送，倒装芯片互连和天线形状提供适当宽的天线带宽，效率相对较高。

3. 发明授权

US09143286B2 Estimation of signal to noise ratio in receivers 有权
标题翻译：接收机信噪比的估计
公开(公告)号：US09143286B2
公开(公告)日：2015-09-22
申请号：US13522908
申请日：2011-01-18
申请人： Yunxin Li
发明人： Yunxin Li
IPC分类号： H04B17/00 , H04L1/20 , H04B17/336 , H04L27/26
CPC分类号： H04L1/206 , H04B17/336 , H04L27/2647
摘要： This invention concerns the estimation of signal to noise ratio (SNR) at a communications receiver; it may be applicable to a wide range of receivers but is particularly suited for Orthogonal Frequency Division Multiplexing (OFDM) receivers. In particular the invention is a method, a receiver and software for performing the method. The signal to noise ratio (SNR) in the received signals is estimated by directly estimating the power ratio, in the received signal, between the part of the frequency spectrum of the received signal that contains only noise, and the part of the spectrum that contains both signal and noise; and averaging this value over a time interval.
摘要翻译：本发明涉及在通信接收机处的信噪比（SNR）的估计; 它可能适用于广泛的接收机，但特别适用于正交频分复用（OFDM）接收机。具体地，本发明是用于执行该方法的方法，接收器和软件。接收信号中的信噪比（SNR）通过直接估计接收到的信号中仅包含噪声的接收信号的频谱的部分之间的功率比和包含信号和噪声都有; 并在一段时间间隔内对该值求平均值。

4. 发明授权

US09124346B2 Switching gates mixer 有权
标题翻译：开关门混频器
公开(公告)号：US09124346B2
公开(公告)日：2015-09-01
申请号：US13514528
申请日：2010-12-09
申请人： Stan Skafidas , Fan Zhang
发明人： Stan Skafidas , Fan Zhang
IPC分类号： H04B1/38 , H04B1/30 , H03D7/14 , H03D7/16 , H04B1/00
CPC分类号： H04B1/30 , H03D7/1441 , H03D7/1458 , H03D7/1475 , H03D7/1483 , H03D7/165 , H04B1/0028
摘要： This invention concerns a sub-harmonic homodyne mixer suitable for operation at the millimeter waveband (MMW); for instance the 60 GHz RF radio band. The mixer comprises: A first pair of transistors connected together with common source and common drain, and having an input port across their gates to receive the in-phase voltage signal from a local oscillator. A second pair of transistors also connected together with common source and common drain, and having an input port across their gates to receive the quadrature voltage signal from the local oscillator. Wherein, an input voltage port is defined directly across the common sources of the first and second pairs of transistors, and an output voltage port is defined between the common drains of the first pair of transistors and the common drains of the second pair of transistors. According to another aspect the present invention is a transceiver comprising a mixer according to the first aspect.
摘要翻译：本发明涉及适用于在毫米波段（MMW）下操作的亚谐波零差混频器; 例如60GHz RF无线电频段。混频器包括：第一对晶体管，其与公共源极和公共漏极连接在一起，并且在其栅极之间具有接收来自本地振荡器的同相电压信号的输入端口。第二对晶体管也与公共源极和公共漏极连接在一起，并且在其栅极之间具有接收来自本地振荡器的正交电压信号的输入端口。其中，输入电压端口被直接限定在第一和第二对晶体管对的公共源上，并且输出电压端口被限定在第一对晶体管的公共漏极和第二对晶体管的公共漏极之间。根据另一方面，本发明是一种收发机，包括根据第一方面的混合器。

5. 发明授权

US08879653B2 Soft-demapping of QAM signals 有权
标题翻译： QAM信号的软解映射
公开(公告)号：US08879653B2
公开(公告)日：2014-11-04
申请号：US13384932
申请日：2010-08-06
申请人： Yunxin Li
发明人： Yunxin Li
IPC分类号： H04L27/22 , H04L27/38 , H04L27/34 , H04L25/06 , H04L25/02 , H04L25/03 , H04L27/26
CPC分类号： H04L25/067 , H04L25/0228 , H04L25/03159 , H04L27/2655 , H04L27/3433
摘要： This invention concerns soft-decision demapping of Quadrature Amplitude Modulation (QAM) signals to enable soft-decision channel decoding in a communications system. In a first aspect the invention is a method for performing the soft-decision demapping of Quadrature Amplitude Modulation (QAM) signals to enable soft-decision channel decoding in a communications system. The method comprises the steps of Extracting baseband signals from both I-and-Q channels. Sampling the baseband signals to extract a stream of complex numbers. Converting the stream of complex numbers to frequency domain vectors with components for each subcarrier frequency. Approximating bit log-likelihood ratios for each symbol directly from the real and imaginary parts of the corresponding frequency vector, without equalization by the estimated channel. And, soft-decoding of the channel codes using the approximated log-likelihood ratios. In other aspects the invention concerns a device for performing the method and software for performing the method.
摘要翻译：本发明涉及正交幅度调制（QAM）信号的软判决解映射，以便在通信系统中实现软判决信道解码。在第一方面，本发明是一种用于执行正交幅度调制（QAM）信号的软判决去映射以在通信系统中实现软判决信道解码的方法。该方法包括从I和Q信道中提取基带信号的步骤。对基带信号进行采样以提取复数流。将复数流转换为具有每个子载波频率的分量的频域向量。每个符号的近似比特对数似然比直接来自相应频率矢量的实部和虚部，而不用估计的信道进行均衡。并且，使用近似对数似然比对信道码进行软解码。在其他方面，本发明涉及一种用于执行用于执行该方法的方法和软件的装置。

6. 发明授权

US08824450B2 Synchronising a communications device 有权
标题翻译：同步通信设备
公开(公告)号：US08824450B2
公开(公告)日：2014-09-02
申请号：US13321517
申请日：2010-05-18
申请人： Yunxin Li
发明人： Yunxin Li
IPC分类号： H04W56/00
CPC分类号： H04W56/0085 , H04L7/0008
摘要： In one aspect, the method of synchronizing a communications device in a wireless communications network comprises receiving a beacon signal at a first frequency; and receiving a data signal at a second frequency, the beacon signal being used to synchronize reception of the data signal. In another aspect, the method comprises transmitting a beacon signal at a first frequency; and transmitting a data signal at a second frequency, the beacon signal being useable to synchronize reception of the data signal. The first frequency is substantially less than the second frequency such that the beacon signal experiences substantially different frequency-dependent propagation effects to the data signal.
摘要翻译：一方面，在无线通信网络中同步通信设备的方法包括以第一频率接收信标信号; 并且以第二频率接收数据信号，所述信标信号用于同步数据信号的接收。在另一方面，该方法包括以第一频率发射信标信号; 并且以第二频率发送数据信号，所述信标信号可用于同步数据信号的接收。第一频率基本上小于第二频率，使得信标信号经历与数据信号基本上不同的频率相关的传播效应。

7. 发明授权

US08804869B2 OFDM PAPR reduction using cancelation vectors 有权
标题翻译：使用取消向量减少OFDM PAPR
公开(公告)号：US08804869B2
公开(公告)日：2014-08-12
申请号：US13511335
申请日：2010-11-23
申请人： Yunxin Li
发明人： Yunxin Li
IPC分类号： H04L25/49 , H04L25/03 , H04L27/34
CPC分类号： H04L27/3411 , H04B2201/70706 , H04L27/2618
摘要： A Symbol vector for RF transmission after multiplexing onto a subset of a set of subcarriers using OFDM is transformed to the time domain. A first time domain cancellation vector is generated from a basis vector that has the same dimensionality as the symbol vector. In the frequency domain the basis vector has a substantially zero value in each of a first subset of sub-carriers of the symbol vector and in the time domain the difference between a first element of the basis vector having the highest value and a second element of the basis vector having the next highest value is maximized. The first cancellation vector is subtracted from the symbol vector to produce modified symbol vector having reduced Peak-to-Average Power Ratio (PAPR). A second cancellation vector is generated using the modified symbol vector and is used to produce a second modified symbol vector having reduced PAPR.
摘要翻译：使用OFDM将多路复用到一组子载波的子集之后的RF传输的符号向量被变换到时域。从具有与符号向量相同的维度的基矢量生成第一时域消除矢量。在频域中，基本矢量在符号向量的子载波的第一子集中的每一个中具有基本为零的值，并且在时域中，具有最高值的基矢量的第一元素与第一元素的第二元素之间的差具有下一最高值的基矢量被最大化。从符号向量中减去第一个抵消矢量，以产生具有降低的峰值平均功率比（PAPR）的修改符号向量。使用修改的符号向量生成第二抵消向量，并且用于产生具有减小的PAPR的第二修改符号向量。

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