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1. 发明公开

EP1961111A1 KALMAN FILTER FOR CHANNEL ESTIMATION IN OFDM SYSTEMS 审中-公开
标题翻译：卡尔曼滤波算法在OFDM系统的信道估计
公开(公告)号：EP1961111A1
公开(公告)日：2008-08-27
申请号：EP06814299.1
申请日：2006-09-07
申请人： Sandbridge Technologies, Inc.
发明人： IANCU, Daniel , YE, Hua , GLOSSNER, John
IPC分类号： H03D1/00
CPC分类号： H04L25/022 , H04L25/0228 , H04L25/025 , H04L27/2647
摘要： A scalar Kalman filter is applied for a Least-Square estimated value Hs at s. The filter has an input for receiving Hs , a filter equation and an out for the corrected estimated value Hk for the kth variable. The filter equation is Hk = Kgain Sn [k] wherein: correction Sn [k] = S + Kn ( Hs -S); prediction of the correction S = Ka Sn [k]; Kalman filter gain Kn = P / ( 1 + P); minimum predication MSE P = Ka2 Pn [k] + Kb; minimum MSE Pn [k] = P ( 1 - Kn ); and Ka , Kgain and Kb are constants.

2. 发明授权

EP1687867B1 MODIFIED PRINTED DIPOLE ANTENNAS FOR WIRELESS MULTI-BAND COMMUNICATION SYSTEMS 有权转让
标题翻译：用于无线多频带通信系统的改进型印刷偶极子天线
公开(公告)号：EP1687867B1
公开(公告)日：2008-10-29
申请号：EP04816981.7
申请日：2004-11-22
申请人： Sandbridge Technologies, Inc.
发明人： SURDUCAN, Emanoil , IANCU, Daniel , GLOSSNER, John
IPC分类号： H01Q1/38 , H01Q9/28
CPC分类号： H01Q9/285 , H01Q1/38 , H01Q21/30

3. 发明公开

EP1609249A1 AM RECEIVER AND DEMODULATOR 审中-公开
标题翻译： AM接收机和解调
公开(公告)号：EP1609249A1
公开(公告)日：2005-12-28
申请号：EP04718480.9
申请日：2004-03-08
申请人： Sandbridge Technologies, Inc.
发明人： IANCU, Daniel
IPC分类号： H04B1/28
CPC分类号： H04B1/0021 , H03G3/3036 , H03G3/3052 , H04B1/0003 , H04B1/28
摘要： An amplitude modulation receiver including an antenna (10) for receiving a signal (1) and an input filter (12) connected to the antenna. A variable gain amplifier (16) is connected to the input filter and is responsive to a gain control signal. An A/D converter is connected to the variable gain amplifier and is responsive to a sampling signal and provides a sampled digital signal. A D/A converter (22) receives a demodulated signal and provides an analog output signal. A controller (20) receives and demodulates the sampled digital signal from the A/D converter, generates the gain control signal for the variable gain amplifier, generates the sampling signal for the A/D converter, and provides the demodulated signal to the D/A converter. The demodulation and generation of the gain control signal and the sampling signal are performed in software.

4. 发明授权

EP1673877B1 MULTIPLE COMMUNICATION PROTOCOLS WITH COMMON SAMPLING RATE 有权转让
标题翻译：与公共采样多种通信协议
公开(公告)号：EP1673877B1
公开(公告)日：2009-08-05
申请号：EP04755725.1
申请日：2004-06-22
申请人： Sandbridge Technologies, Inc.
发明人： IANCU, Daniel , NACER, Gary , STANLEY, Stuart, G.
IPC分类号： H04B1/40
CPC分类号： H04B1/005 , H04B1/406
摘要： A radio including a first channel for receiving signals at a first frequency and a second channel for receiving and transmitting signals at a second frequency. A multiplexer connects the first and second channels through an A/D and D/A converter to a digital signal processor. An oscillator is connected to and provides a common sampling frequency to the A/D and D/A converters. The digital signal processor controls the multiplexer and modifies the received digital signals to accommodate for the different carrier frequencies of the channels using the common sampling rate. A frequency synthesizer is connected to the oscillator and provides different frequency signals for the channels. A third channel may be provided for receiving and transmitting signals at a third frequency and is also connected to the multiplexer. The processor is capable of performing communication protocols for at least two of the channels simultaneously.

5. 发明公开

EP1687867A1 MODIFIED PRINTED DIPOLE ANTENNAS FOR WIRELESS MULTI-BAND COMMUNICATION SYSTEMS 有权转让
标题翻译：改进印制偶极子用于无线多频带通信系统
公开(公告)号：EP1687867A1
公开(公告)日：2006-08-09
申请号：EP04816981.7
申请日：2004-11-22
申请人： Sandbridge Technologies, Inc.
发明人： SURDUCAN, Emanoil , IANCU, Daniel , GLOSSNER, John
IPC分类号： H01Q1/38 , H01Q9/28
CPC分类号： H01Q9/285 , H01Q1/38 , H01Q21/30
摘要： A dipole antenna for a wireless communication device, which includes a first conductive element superimposed on a portion of and separated from a second conductive element by a first dielectric layer. A first conductive via connects the first and second conductive elements through the first dielectric layer. The second conductive element is generally U-shaped. The second conductive element includes a plurality of spaced conductive strips extending transverse from adjacent ends of the legs of the U-shape. Each strip is dimensioned for a different center frequency λ0. The first conductive element may be L-shaped, and one of the legs of the L-shape being superimposed on one of the legs of the U-shape. The first conductive via connects the other leg of the L-shape to the other leg of the U-shape.

6. 发明公开

EP1649608A2 RAKE RECEIVER WITH MULTI-PATH INTERFERENCE ACCOMMODATION 审中-公开
标题翻译：具有多路干扰的RAKE接收机
公开(公告)号：EP1649608A2
公开(公告)日：2006-04-26
申请号：EP04778955.7
申请日：2004-07-26
申请人： Sandbridge Technologies, Inc.
发明人： IANCU, Daniel , GLOSSNER, John , MOUDGILL, Mayan
IPC分类号： H04B1/707
CPC分类号： H04B1/7115 , H04B1/7107 , H04B1/712 , H04L25/0202
摘要： A method of extracting data from a received signal including multi-path interference in a rake receiver. The method includes sampling and filtering the received signal; estimating a time delay (a) between paths for the filtered samples ψ(τ); and estimating channel complex coefficient (b) for the filtered samples ψ(τ). Transmitted data x(τ1) is extracted from the filtered samples ψ(τ) for each path l by solutions of simultaneous equations of the following filtered samples ψ(τ) equation (Formula I) wherein k is a particular path, Np is the number of visible paths, (c) is a a double convolution matrix of the filtering process and (d) is the pseudo inverse, Ass (τl) is the product of spreading and scrambling matrices and (e) is the inverse, and (f) is noise.
摘要翻译：在瑞克接收机中从包括多径干扰的接收信号中提取数据的方法。该方法包括对接收到的信号进行采样和滤波; 估计经过滤样本ψ（τ）的路径之间的时间延迟（a）; 并估计滤波样本ψ（τ）的信道复数系数（b）。通过以下滤波样本的联立方程的解ψ（τ）等式（公式I），从每个路径l的滤波样本ψ（τ）中提取传输数据x（τ1），其中k是特定路径，Np是数字（c）是滤波过程的双重卷积矩阵，（d）是伪逆矩阵，（（τl）是扩展矩阵和加扰矩阵的乘积，（e）是逆矩阵，（f）是噪声。

7. 发明公开

EP1902587A1 DIGITAL IMPLEMENTATION OF ANALOG TV RECEIVER 审中-公开
标题翻译：数字化的模拟电视接收
公开(公告)号：EP1902587A1
公开(公告)日：2008-03-26
申请号：EP06750019.9
申请日：2006-04-13
申请人： Sandbridge Technologies, Inc.
发明人： YE, Hua , IANCU, Daniel , GLOSSNER, John , KOTLYAR, Vladimir , IANCU, Andrei
IPC分类号： H04N9/44 , H04N9/78
CPC分类号： H04N9/44 , H04N9/78
摘要： An analog TV receiver implementation on DSP allows mobile platforms to view analog TV broadcasting on LCD displays. The analog television receiver includes a demodulator for demodulating a received analog television signal, an analog to digital converter for digitizing the demodulated television signal and a digital signal processor for producing display signals from the digitized television signals. The digital signal processor being programmed to search for a horizontal synchronization signal in the television signal, track the horizontal synchronization signal and search for a vertical synchronization signal in the television signal. Next the processor separates a luminance and a pair of chrominance components of the television signal and demodulates the pair of chrominance components. Red, green and blue values are constructed from the demodulated chrominance components and the luminance components. Display signals are produced from the red, green and blue values.

8. 发明公开

EP1854169A2 MICROSTRIP MULTI-BAND COMPOSITE ANTENNA 审中-公开
标题翻译：多频段复合微带天线
公开(公告)号：EP1854169A2
公开(公告)日：2007-11-14
申请号：EP06720088.1
申请日：2006-02-02
申请人： Sandbridge Technologies, Inc.
发明人： SURDUCAN, Emanoil , IANCU, Daniel , GLOSSNER, John
IPC分类号： H01Q1/38 , H01Q11/12 , H01Q21/12
CPC分类号： H01Q9/28 , H01Q1/38 , H01Q9/285
摘要： The multi-band antenna structure (fig. 2) includes a first antenna (10) having a band width about a middle frequency and a second antenna (12) spaced and electrically isolated from the first antenna. Ends of the second antenna (12) are shorted to each other and the second antenna floats electrically. The first and second antennas are planar and superimposed in parallel planes. At least layers (14, 18 in fig. 1) of dielectric material of at least thicknesses are between the two antennas. A third layer (16) of dielectric material of a third thickness is between the two antennas.

9. 发明公开

EP1808026A1 TPS DECODER IN AN ORTHOGONAL FREQUENCY DIVISION MULTIPLEXING RECEIVER 有权
标题翻译： TPS解码器IN A正交频分复用接收机
公开(公告)号：EP1808026A1
公开(公告)日：2007-07-18
申请号：EP05796074.2
申请日：2005-08-31
申请人： Sandbridge Technologies, Inc.
发明人： YE, Hua , IANCU, Daniel
IPC分类号： H04N11/06
CPC分类号： H04L1/20 , H04H20/28 , H04H40/18 , H04L27/2647
摘要： A receiver (for orthogonal frequency division multiplexing (OFDM) signals, including an A/D converter (for converting received analog signals to a digital signal data stream and an OFDM demodulator (64) for producing a first set of complex I and Q components of sub-carriers from the digital signal data stream. The receiver includes a CSI estimator (70) for estimating Channel State Information (CSI) from the sets of complex I and Q components and a TPS decoder for decoding TPS data from the sets of complex I and Q components using the CSI.

10. 发明公开

EP1754355A1 ORTHOGONAL FREQUENCY DIVISION MULTIPLEXING RECEIVER 审中-公开
标题翻译：正交频分复用接收机
公开(公告)号：EP1754355A1
公开(公告)日：2007-02-21
申请号：EP05757666.2
申请日：2005-06-07
申请人： Sandbridge Technologies, Inc.
发明人： IANCU, Daniel , YE, Hua , GLOSSNER, John , ABDELILAH, Youssef
IPC分类号： H04L27/00 , H04L27/02 , H04L27/10 , H04L27/14 , H04L27/28 , H03D1/24
CPC分类号： H04L27/2657 , H04L27/2662
摘要： A receiver for orthogonal frequency division multiplexing signals, including an A/D converter (52) for converting receiver analog signals to a digital signal data stream, wherein the digital signal data stream includes symbols separated by guard segments. The receiver also includes an I/Q demodulator (54) for producing a first set of complex I and Q components from the digital data stream and a guard segment length detector (58) using the first set of I and Q components. It further includes an extractor (62) for extracting and removing the guard segments of the detected length from the digital signal data stream and an FFT demodulator (64) for demodulating the symbols of the digital signal data stream to produce second sets of complex I and Q components.

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