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1. 发明授权

US08194793B2 Multi-stage frequency offset estimation and compensation method and its circuit 有权
标题翻译：多级频偏估计及补偿方法及其电路
公开(公告)号：US08194793B2
公开(公告)日：2012-06-05
申请号：US12697612
申请日：2010-02-01
申请人： Syang-Myau Hwang , Chun Chin Chen
发明人： Syang-Myau Hwang , Chun Chin Chen
IPC分类号： H03D3/22 , H04L27/22 , H04L27/18 , H03D3/00 , H03K9/06
CPC分类号： H04L27/0014 , H04L27/22
摘要： A multi-stage frequency offset (FO) estimation and compensation method and its circuit are described. The method includes performing at least a stage of primary-level FO estimation and compensation procedure, and a stage of advance-level FO estimation and compensation procedure. The first stage receives an input carrier signal of a larger FO and outputs a corrected carrier signal with an estimation error within the required estimation range of the next stage, to the next stage. Generated and fed forward stage-by-stage, the corrected carrier signal free of FO may be approached. Besides, since a feed-forward rather than a closed-loop approach is employed, the SNR requirement may be lower. Also, at primary-level, modulation may be first removed so the whole input carrier signal may be used to estimate FO; at advance-level, the periodic PN sequence in the input carrier signal may be utilized to estimate FO, thereby no dedicated training symbols are required.
摘要翻译：描述了多级频偏（FO）估计和补偿方法及其电路。该方法包括执行初级FO估计和补偿过程的至少一个阶段，以及提前级FO估计和补偿程序的阶段。第一级接收较大FO的输入载波信号，并将具有估计误差的校正载波信号输出到下一级的所需估计范围内，到下一级。生成和逐级前馈，可以接近没有FO的校正载波信号。此外，由于采用前馈而不是闭环方式，因此SNR要求可能较低。此外，在初级时，可以首先去除调制，使得整个输入载波信号可以用于估计FO; 在提前级，输入载波信号中的周期性PN序列可用于估计FO，从而不需要专用的训练符号。

2. 发明申请

US20070211818A1 Method and apparatus for bit-rate enhancement and wireless communication using the same 审中-公开
标题翻译：用于比特率增强的方法和装置以及使用其的无线通信
公开(公告)号：US20070211818A1
公开(公告)日：2007-09-13
申请号：US11714786
申请日：2007-03-07
申请人： Hung-Cheng Chien , Szu-Wei Hou , Yi-Chun Lu
发明人： Hung-Cheng Chien , Szu-Wei Hou , Yi-Chun Lu
IPC分类号： H04L27/00
CPC分类号： H04L25/03834
摘要： A method and an apparatus for bit-rate enhancement and a wireless communication system using the same are disclosed. According to the present invention, two approaches are provided for bit-rate enhancement: one is an increase of chip-rate and the other is a decrease of chip number associated with on symbol. As such, the transmission bit-rate can be enhanced significantly so as to facilitate the applications of wireless voice communications or security.
摘要翻译：公开了一种用于比特率增强的方法和装置以及使用该方法和装置的无线通信系统。根据本发明，提供了用于比特率增强的两种方法：一种是码片速率的增加，另一种是与码元相关联的码片数量的减少。因此，可以显着增强传输比特率，以便于无线语音通信或安全性的应用。

3. 发明申请

US20150263670A1 Frequency Modulation Based on Two Path Modulation 审中-公开
标题翻译：基于两路调制的调频
公开(公告)号：US20150263670A1
公开(公告)日：2015-09-17
申请号：US14203572
申请日：2014-03-11
申请人： Uniband Electronic Corp.
发明人： Yiping Fan , Chun-Yuan Lin , Sheng-Wei Chiang , Yi-Chun Lu
IPC分类号： H03B5/12
CPC分类号： H03B5/1206 , H03B5/1228 , H03B5/1243 , H03C3/0916 , H03C3/0941 , H03C3/0958 , H03C3/0975
摘要： A two path direct frequency modulation system is disclosed. The system includes a Varactor, a voltage-controlled oscillator (VCO) calibration capacitor bank including a first plurality of switchable capacitors, and a frequency deviation capacitor bank including a second plurality of switchable capacitors. The method includes switching on or off a number of the first plurality of switchable capacitors to obtain a desired frequency band and determining number of cycles within a first predetermined time to obtain a first count, switching on or off a number of the first plurality of switchable capacitors or of the second plurality of switchable capacitors to change the desired frequency band and determining number of cycles within a second predetermined time to obtain a second count, and modulating a data signal by switching on or off a switchable capacitors of the second plurality of switchable capacitors according to the first and the second count.
摘要翻译：公开了一种双路直接调频系统。该系统包括Varactor，包括第一多个可切换电容器的压控振荡器（VCO）校准电容器组，以及包括第二多个可切换电容器的频偏电容器组。该方法包括：接通或关闭第一多个可切换电容器的数量以获得期望的频带，并且确定在第一预定时间内的周期数以获得第一计数，接通或关闭第一多个可切换电容器电容器或第二多个可切换电容器，以改变期望的频带并确定在第二预定时间内的周期数以获得第二计数，以及通过接通或关闭第二多个可切换电容器的可切换电容器来调制数据信号电容器根据第一和第二计数。

4. 发明申请

US20150063504A1 Digital Receiver System Activated by RSSI Signal 有权
标题翻译：数字接收机系统由RSSI信号激活
公开(公告)号：US20150063504A1
公开(公告)日：2015-03-05
申请号：US14013043
申请日：2013-08-29
申请人： Uniband Electronic Corp.
发明人： Yiping Fan , Chun-Yuan Lin , Sheng-Chia Huang , Chun-Chin Chen
IPC分类号： H03G3/30 , H03G3/00
CPC分类号： H03G3/001 , H03G3/3078
摘要： A digital receiver includes a radio frequency analog front end, a digital processing unit, a plurality of cascaded amplifier stages configured to receive output of the radio frequency analog front end, a first analog to digital converter configured to convert an analog signal output from the plurality of cascaded amplifier stages into a digital signal output to the digital processing unit, a first received signal strength indicator unit configured to receive outputs of each of the plurality of cascaded amplifier stages and output signal to the digital processing unit, a second received signal strength indicator unit configured to receive output of at least one amplifier stage in the plurality of cascaded amplifier stages, and a received signal strength indicator detection unit configured to activate and to deactivate digital units according to a comparison of output from the second received signal strength indicator unit to a predetermined threshold.
摘要翻译：数字接收机包括射频模拟前端，数字处理单元，被配置为接收射频模拟前端的输出的多个级联放大器级，第一模数转换器，被配置为转换从多个模拟前端输出的模拟信号级联放大器级的数字信号输出到数字处理单元的数字信号中，第一接收信号强度指示器单元，被配置为接收多个级联放大器级中的每一个的输出并输出信号到数字处理单元，第二接收信号强度指示器被配置为接收所述多个级联放大器级中的至少一个放大器级的输出的单元，以及接收信号强度指示器检测单元，被配置为根据来自所述第二接收信号强度指示器单元的输出与预定阈值。

5. 发明申请

US20100272261A1 Data Security Transmission Wirelessly with Zigbee Chips 审中-公开
标题翻译：数据安全传输无线与Zigbee芯片
公开(公告)号：US20100272261A1
公开(公告)日：2010-10-28
申请号：US12430276
申请日：2009-04-27
申请人： Chih-Yuan Su , Chun-Chin Chen , Chun-Yi Chai , Huan-Ping Su
发明人： Chih-Yuan Su , Chun-Chin Chen , Chun-Yi Chai , Huan-Ping Su
IPC分类号： H04L9/00
CPC分类号： H04L9/0877 , H04L9/083 , H04L63/062 , H04L63/18 , H04L2209/805 , H04W12/04031 , H04W84/18
摘要： A wireless network system for data transmitting securely is disclosed. The system comprises a central control end for generating a cipher password per predetermined time unit. The central control end has a first Zigbee chip, a computer terminal for a user to input parameters, and a cryptographic algorithm program provided wherein the cryptographic algorithm program and the parameters are provided for password encryption using the cryptographic algorithm program is run by a microprocessor of the first Zigbee chip. The system also comprises a data transmitting end and a several data receiving ends. The data transmitting end using the Zigbee decrypts the cipher password and encrypts the data file using the plain password and the Zigbee chip. The data receiving ends using the Zigbee decrypt the cipher password and decrypt the cipher data file into plain data file by the WiFi chips using plain password.
摘要翻译：公开了一种用于数据传输安全的无线网络系统。该系统包括用于每预定时间单位产生密码密码的中央控制端。中央控制端具有第一Zigbee芯片，用于用户输入参数的计算机终端，以及提供的加密算法程序，其中使用密码算法程序为密码加密提供密码算法程序和参数，由微处理器第一个Zigbee芯片。该系统还包括数据发送端和几个数据接收端。使用Zigbee的数据发送端解密密码，并使用纯密码和Zigbee芯片加密数据文件。使用Zigbee数据接收结束解密密码密码，并通过WiFi芯片使用纯密码将密码数据文件解密为普通数据文件。

6. 发明申请

US20110292982A1 Method of Using Average Phase Difference to Measure a Distance and Apparatus for the Same 审中-公开
标题翻译：使用平均相位差测量距离的方法及其设备
公开(公告)号：US20110292982A1
公开(公告)日：2011-12-01
申请号：US12986438
申请日：2011-01-07
申请人： Chun-Chin Chen , Wei-Tun Peng , Li-Rong Wang
发明人： Chun-Chin Chen , Wei-Tun Peng , Li-Rong Wang
IPC分类号： H04B17/00
CPC分类号： G01S5/14 , G01S11/02 , G01S11/06
摘要： Apparatus for positioning and method for the same are disclosed. The apparatus comprises two transceivers and four time-to-digital converters. The time-to-digital converters compare the phase difference between two signals, one is the crystal oscillation and the other is the phase of the IF (intermediate frequency) signal extracted before ADC receiving by the transceiver. The method comprises the following steps: The first place transmits a first wireless signal by a first transceiver to the second place. The second place then responds a second wireless signal by a second transceiver to the first place. The first phase difference at the first place is then measured by the time-to-digital converter. The second phase difference at the second place is also measured. The distance between the first place and the second place is proportional to one half of the sum of first phase difference and the second phase difference.
摘要翻译：公开了一种定位装置及其方法。该装置包括两个收发器和四个时间 - 数字转换器。时间 - 数字转换器比较两个信号之间的相位差，一个是晶体振荡，另一个是在收发器接收ADC之前提取的IF（中频）信号的相位。该方法包括以下步骤：第一方通过第一收发器向第二方发送第一无线信号。第二个地方是第一个收发器响应第二个无线信号。然后通过时间 - 数字转换器测量第一位置的第一相位差。也测量第二个相位差。第一位置和第二位置之间的距离与第一相位差和第二相位差的和的一半成比例。

7. 外观设计

USD570800S1 ISM-band printed antenna for a portion of a circuit board 有权
标题翻译：用于电路板一部分的ISM带式印刷天线
公开(公告)号：USD570800S1
公开(公告)日：2008-06-10
申请号：US29250640
申请日：2006-11-27
申请人： Hui-Mei Chen , Wei-Hsiu Hsu , Huan-Ping Su , Chien-Hsin Su
设计人： Hui-Mei Chen , Wei-Hsiu Hsu , Huan-Ping Su , Chien-Hsin Su

8. 发明授权

US11569854B1 RF receiver and method for simultaneously compensating carrier frequency offset and optimizing bandwidth by using preamble of a received RF signal 有权
公开(公告)号：US11569854B1
公开(公告)日：2023-01-31
申请号：US17666567
申请日：2022-02-08
申请人： Uniband Electronic Corp.
发明人： Yiping Fan , Li-Feng Chen
IPC分类号： H04B1/12
摘要： A radio frequency (RF) receiver has an antenna, a low-noise amplifier, a sigma-delta frequency synthesizer/voltage-controlled oscillator (VCO), an in-phase and quadrature (I/Q) mixer, a channel filter, and a digital baseband circuit. The digital baseband circuit has a demodulator, a preamble detection and carrier frequency offset (CFO) estimation circuit, and a CFO to sigma-delta modulation (SDM) input mapper. A preamble field of a digital demodulated signal generated by the demodulator is detected by the preamble detection and CFO estimation circuit. The RF receiver simultaneously compensates its CFO and optimizes a bandwidth of the channel filter based on the detection of the preamble field of the digital demodulated signal by the preamble detection and CFO estimation circuit.

9. 发明授权

US10630309B1 Signal receiver for radio signal strength indication estimation with sub-sampling analog-to-digital converter for radio frequency signal with constant envelope modulation 有权
公开(公告)号：US10630309B1
公开(公告)日：2020-04-21
申请号：US16387548
申请日：2019-04-18
申请人： Uniband Electronic Corp.
发明人： Yiping Fan , Li-Feng Chen
IPC分类号： H03M1/00 , H03M1/46 , H03M3/00 , H03M1/10 , H03M1/12
CPC分类号： H03M1/46 , H03M1/1071 , H03M1/1245 , H03M3/468
摘要： A signal receiver includes a multiplexer, a sub-sample analog-to-digital converter (ADC) and a received signal strength indicator (RSSI) estimator for a signal receiver with multiple stage cascade amplifiers architecture. The multiplexer may select one of the input signal of each stage of cascade amplifiers or the last stage output signal of cascade amplifiers as a selected signal according to a selection signal. The sub-sample ADC may perform a sub-sampling operation using the selected signal to generate sampled data. The RSSI estimator may calculate a RSSI value corresponding to the selected signal according to the sampled data.

10. 发明授权

US08279014B2 Frequency synthesizer with built-in carrier and crystal oscillation frequency offset cancellation 有权
标题翻译：频率合成器内置载波和晶体振荡频偏补偿
公开(公告)号：US08279014B2
公开(公告)日：2012-10-02
申请号：US12986372
申请日：2011-01-07
申请人： Chun-Chin Chen , Yun-Hsueh Chuang , Yi-Chun Lu
发明人： Chun-Chin Chen , Yun-Hsueh Chuang , Yi-Chun Lu
IPC分类号： H03L7/08 , H04B15/00
CPC分类号： H03L7/1976
摘要： A frequency synthesizer of a transceiver for generating a crystal oscillation frequency and a carry frequency having been done a process of frequency offset cancellation with that of another transceiver. The frequency offset cancellation of the frequency synthesizer is done in accordance with a wireless signal which is transmitted from another transceiver received. The frequency synthesizer has a first sigma-delta modulator receiving a signal transmitted by a transceiver at far area responding thereafter a frequency divisor value in accordance with the channel information of the received signal and a frequency offset between two.
摘要翻译：一种用于产生晶体振荡频率和进位频率的收发器的频率合成器，该频率合成器已经进行了与另一个收发器的频率偏移消除的处理。频率合成器的频率偏移消除是根据从另一收发信机发送的无线信号完成的。频率合成器具有第一Σ-Δ调制器，接收由远端的收发信机发送的信号，然后根据接收信号的信道信息和两者之间的频率偏移响应频率除数值。

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