专利快速检索-快速检索全球专利，免费商用专利数据库-IPRDB

51. 发明授权

CN1130023C 控制音频频带处理器增益的电路和方法失效
公开(公告)号：CN1130023C
公开(公告)日：2003-12-03
申请号：CN98812063.1
申请日：1998-12-14
申请人：夸尔柯姆股份有限公司
发明人： W·L·享姆比格呢 , J·A·哈奇森四世 , L·D·奥里维拉
IPC分类号： H03M1/18
CPC分类号： H03M1/185
摘要：一种控制增益的音频频带处理器和方法以及电路。音频频带处理器包含：第一可变增益放大器(202)，用于接收模拟音频信号；模拟一数字转换器(204)，用于将所述模拟音频信号转换为数字音频信号；以及接口电路(206)，用于编码所述数字音频信号。接口电路(206)还将所述数字音频信号放入编码发送帧序列，并且接收编码接收帧序列，每帧接收帧包含预定数量的编码数字音频信号数据比特和预定数量的数字增益控制比特。接口电路(206)还调整所述第一可变增益放大器的增益水平以响应所述数字增益控制比特。在另一实施例中，音频频带处理器进一步包括第二可变增益放大器(202)，并且接口电路还调整所述第二可变增益放大器的增益水平以响应所述数字增益控制比特。

52. 发明公开

CN1387700A 在数字接收器和数字发射器中用于自适应比特分辨率的方法和装置无效
公开(公告)号：CN1387700A
公开(公告)日：2002-12-25
申请号：CN00815373.6
申请日：2000-08-29
申请人：艾利森电话股份有限公司
发明人： M·赫尔马克
IPC分类号： H03M1/12 , H03M1/66 , H04L1/00
CPC分类号： H03M1/66 , H03M1/129 , H03M1/185
摘要：一种收发器包括接收器和发射器。该接收器包括将所接收的模拟信号转换为数字形式的模拟到数字转换装置,以及该发射器包括将数字信号转换为发射的模拟形式的数字到模拟转换装置。选择器选择转换装置的分辨率。基于所接收的信号的质量例如信号噪声比或信号干扰比选择该模拟到数字转换装置的分辨率。基于所发射的信号的峰值因数选择该数字到模拟转换装置的分辨率,该峰值因数例如取决于所发射的信号的调制格式。峰值因数越高,所选择的分辨率越高。

53. 发明公开

CN1341296A 接收装置和增益控制方法无效
公开(公告)号：CN1341296A
公开(公告)日：2002-03-20
申请号：CN00803990.9
申请日：2000-12-19
申请人：松下电器产业株式会社
发明人：高桥秀行 , 北出崇
IPC分类号： H04B1/16 , H04B7/26
CPC分类号： H04W52/24 , H03G3/3052 , H03G3/3068 , H03M1/185 , H04B1/1027 , H04B1/7107 , H04B7/005 , H04W52/52
摘要： SINR测定部108根据A/D变换部104的输出信号和干扰消除器106的输出信号来测定期望波与干扰波之比。绝对电场强度计算部111根据电场强度测定部109测定的接收信号的电场强度和所述期望波与干扰波之比来计算期望信号的绝对电场强度。判定部112判定所述期望信号的绝对电场强度和预定的目标值之间的大小关系。增益系数计算部113根据判定部112的判定结果来计算增益系数,并控制AGC部103的增益。由此,可以高精度地进行AGC,并且防止接收品质的恶化。

54. 发明申请

WO2008144450A2 ENHANCED PILOT SIGNAL 审中-公开
标题翻译：增强引航信号
公开(公告)号：WO2008144450A2
公开(公告)日：2008-11-27
申请号：PCT/US2008063800
申请日：2008-05-15
申请人： QUALCOMM INC , BLACK PETER J , WU QIANG , ZHAO WANLUN , TOKGOZ YELIZ , PADOVANI ROBERTO , NAGUIB AYMAN FAWZY , KIM JE WOO , EDGE STEPHEN , AGASHE PARAG A , BHUSHAN NAGA , DAYAL PRANAV
发明人： BLACK PETER J , WU QIANG , ZHAO WANLUN , TOKGOZ YELIZ , PADOVANI ROBERTO , NAGUIB AYMAN FAWZY , KIM JE WOO , EDGE STEPHEN , AGASHE PARAG A , BHUSHAN NAGA , DAYAL PRANAV
IPC分类号： H04L5/00
CPC分类号： H04W4/02 , H03M1/185 , H04L5/0023 , H04L5/0048 , H04L27/261 , H04L27/2613 , H04W16/02 , H04W64/00
摘要： Briefly, in accordance with one embodiment, a method of transmitting signals is provided. Signal waveforms are transmitted from at least two respective sectors. The at least two respective sectors are from at least two different sets of a superset of sectors. The transmitted signal waveforms include signal waveforms at least nearly mutually orthogonal at least along a particular signal dimension. An advantage of such an embodiment, for example, is reduced signal interference.
摘要翻译：简而言之，根据一个实施例，提供一种发送信号的方法。信号波形从至少两个相应的扇区发送。所述至少两个相应扇区是来自扇区的超集的至少两组不同的集合。发送的信号波形包括至少沿着特定信号维度至少几乎相互正交的信号波形。例如，这样的实施例的优点是减少了信号干扰。

55. 发明申请

WO2007115327A2 AUTOMATIC GAIN CONTROL 审中-公开
标题翻译：自动增益控制
公开(公告)号：WO2007115327A2
公开(公告)日：2007-10-11
申请号：PCT/US2007/066000
申请日：2007-04-04
申请人： QUALCOMM INCORPORATED , KRISHNAMOORTHI, Raghuraman , MURTHY, Vinay
发明人： KRISHNAMOORTHI, Raghuraman , MURTHY, Vinay
IPC分类号： H03G3/00 , H03G3/30
CPC分类号： H03G3/002 , H03G3/3089 , H03M1/185
摘要： Techniques for performing automatic gain control are described. In some aspects, the gain control is achieved with an apparatus having an analog-to-digital converter (ADC) and a digital variable gain amplifier (DVGA), the DVGA configured to receive a digital signal from the ADC, the DVGA having a processor configured to compute a gain using a base n logarithm based on the power of the digital signal output from the ADC, the processor being further configured to apply the gain to the digital signal.
摘要翻译：描述了执行自动增益控制的技术。在一些方面中，增益控制通过具有模数转换器（ADC）和数字可变增益放大器（DVGA）的设备来实现，DVGA被配置为从ADC接收数字信号，DVGA具有处理器被配置为基于从所述ADC输出的所述数字信号的功率使用基数n对数来计算增益，所述处理器进一步被配置为将所述增益应用于所述数字信号。

56. 发明申请

WO2004098051A1 METHOD AND CIRCUIT FOR CONTROLLING AMPLIFICATION 审中-公开
标题翻译：用于控制放大的方法和电路
公开(公告)号：WO2004098051A1
公开(公告)日：2004-11-11
申请号：PCT/EP2004/004337
申请日：2004-04-23
申请人： COREOPTICS INC. , LANGENBACH, Stefan , STOJANOVIC, Nebojsa
发明人： LANGENBACH, Stefan , STOJANOVIC, Nebojsa
IPC分类号： H03G3/30
CPC分类号： H03G3/3078 , H03G3/001 , H03G3/3052 , H03G3/3068 , H03M1/185
摘要： This invention relates to a method for controlling an amplification within a receiver. The gain of a variable gain amplifier which amplifies an input signal to obtain a gain-controlled signal is set. Said gain controlled signal is analog-to-digital converted. Thereby digital words are generated. Each digital word has a value out of a plurality of possible digital values. Digital words having a value within a first and a second subset of the possible digital values are counted in order to generate a first and a second counter value. The gain is set in accordance with the first and second counter values in a fashion that all counter values are as equal as possible. Furthermore, this invention is related to a circuit to be used within a receiver for adjusting the gain of a variable gain amplifier in order to ensure a proper analog-to-digital conversion.
摘要翻译：本发明涉及一种用于控制接收机内的放大的方法。设置放大输入信号以获得增益控制信号的可变增益放大器的增益。所述增益控制信号被模数转换。从而产生数字字。每个数字字都具有多个可能的数字值中的值。对具有可能的数字值的第一和第二子集内的值的数字字进行计数，以产生第一和第二计数器值。按照所有计数器值尽可能相等的方式，根据第一和第二计数器值设置增益。此外，本发明涉及用于调节可变增益放大器的增益的接收机内使用的电路，以便确保适当的模数转换。

57. 发明申请

WO02043253A2 A RADIO RECEIVER 审中-公开
标题翻译：无线电接收器
公开(公告)号：WO02043253A2
公开(公告)日：2002-05-30
申请号：PCT/GB2001/005103
申请日：2001-11-19
IPC分类号： H04B1/16 , H03G3/30 , H03M1/18 , H04B7/26 , H04B1/00
CPC分类号： H03M1/185 , H03G3/3052
摘要： A radio receiver (30) comprises an ADC (13) including a clip counter. The power of digitised signals provided by the ADC (13) is estimated by a power estimator (31), and an ideal gain value is computed from the power so estimated by a gain computation device (32). Gain computation signals are fed to a gain control input of an amplifier (11) via an LPF (33). A saturation detector (34) is connected to a clip counter output of the ADC (13), and to a control input of the LPF (33). The saturation detector (34) is arranged when saturation of the ADC is detected to reduce the gain setting value by at least two steps, by which the gain of the amplifier is immediately reduced. A detector detects the Doppler frequency of signals received and accordingly determines the size of the drop in amplification which is effected when saturation of the ADC (13) is detected. The gain reduction may be 3dB under very low Doppler shift conditions and 12dB under very high Doppler shift conditions.
摘要翻译：无线电接收机（30）包括一个包括一个剪辑计数器的ADC（13）。由功率估计器（31）估计由ADC（13）提供的数字化信号的功率，并根据由增益计算装置（32）所估计的功率来计算理想增益值。增益计算信号通过LPF（33）馈送到放大器（11）的增益控制输入端。饱和检测器（34）连接到ADC（13）的钳位计数器输出端，并连接到LPF（33）的控制输入端。当检测到饱和度时，饱和检测器（34）被设置为将增益设定值降低至少两个步骤，由此立即减小放大器的增益。检测器检测接收的信号的多普勒频率，并因此确定在检测到ADC（13）的饱和时实现的放大下降的大小。在非常低的多普勒频移条件下，增益减小可能是3dB，而在非常高的多普勒频移条件下，增益减小可能是12dB。

58. 发明申请

WO01048933A1 RECEIVER AND GAIN CONTROL METHOD 审中-公开
标题翻译：接收和增益控制方法
公开(公告)号：WO01048933A1
公开(公告)日：2001-07-05
申请号：PCT/JP2000/009002
申请日：2000-12-19
IPC分类号： H03G3/30 , H03M1/18 , H04B1/10 , H04B7/005 , H04B7/26 , H04W52/04 , H04W88/00 , H04B1/16
CPC分类号： H04W52/24 , H03G3/3052 , H03G3/3068 , H03M1/185 , H04B1/1027 , H04B1/7107 , H04B7/005 , H04W52/52
摘要： A SINR meter (108) measures a signal to interference ratio based on the output from an A/D converter (104) and the output from an interference canceler (108). The field strength detector (111) computes the absolute field strength of a desired signal based on the signal to interference ratio and on the field strength of the received signal measured by a field strength meter (109). A comparator (112) compares the absolutely field strength with a predetermined target value. The gain generator (113) computes a gain factor based on the result of comparison provided by the comparator (112) and controls the gain of an AGC (103) precisely to prevent the degradation of reception quality.
摘要翻译： SINR计（108）根据来自A / D转换器（104）的输出和来自干扰消除器（108）的输出来测量信号干扰比。场强检测器（111）基于信号干扰比和由场强计（109）测量的接收信号的场强来计算期望信号的绝对场强。比较器（112）将绝对场强与预定目标值进行比较。增益生成器（113）基于由比较器（112）提供的比较结果来计算增益因子，并且精确地控制AGC（103）的增益以防止接收质量的劣化。

59. 发明公开

EP3286837A1 ANALOG-TO-DIGITAL CONVERTER (ADC) DYNAMIC RANGE ENHANCEMENT FOR VOICE-ACTIVATED SYSTEMS 有权
公开(公告)号：EP3286837A1
公开(公告)日：2018-02-28
申请号：EP16724458
申请日：2016-04-04
申请人： CIRRUS LOGIC INT SEMICONDUCTOR LTD
发明人： MORTAZAVI YOUSOF , MELANSON JOHN L , ZANBACHI RAMIN , BRENNAN AARON
IPC分类号： H03M1/18 , G10L25/78
CPC分类号： G10L25/78 , G10L15/22 , G10L15/28 , G10L15/34 , G10L21/034 , G10L2015/223 , H03M1/185 , H03M3/49
摘要： The dynamic range and power efficiency of a voice-activated system may be improved by dynamically adjusting the configuration of the voice-activated system's input path. In one embodiment, a first portion of audio may be received through an input path of the voice-activated system having a first configuration. A characteristic of the first portion of audio may be determined and the input path may be adjusted to a second configuration based on the determined characteristic. A second portion of audio may then be received through the input path having the second configuration, and speech analysis may be performed on the second portion of audio.

60. 发明公开

EP2756599A1 VERFAHREN ZUM VERSTÄRKEN EINES ZUR FAHRZEUGUMFELDDETEKTION GEEIGNETEN ECHOSIGNALS UND VORRICHTUNG ZUM DURCHFÜHREN DES VERFAHRENS 失效
标题翻译：方法用于车辆环境检测SUITABLE回波信号的加固和装置实施过程
公开(公告)号：EP2756599A1
公开(公告)日：2014-07-23
申请号：EP12743922.2
申请日：2012-07-17
申请人： Robert Bosch GmbH
发明人： KARL, Matthias
IPC分类号： H03M1/18 , G01S13/93 , G01S15/93 , G01S7/529
CPC分类号： H03M1/001 , G01N27/00 , G01S7/529 , G01S13/931 , G01S15/931 , G01V9/00 , H02M5/42 , H03M1/182 , H03M1/185
摘要： The present invention relates to a method for amplifying an echo signal, wherein an analogue echo signal suitable for vehicle environment detection is amplified by means of an amplification based on the runtime of the echo signal, wherein the analogue echo signal is amplified by means of an amplifier having a plurality of outputs, each with different amplification and a downstream A/D converter with a time-variable reference voltage. At the same time, switching occurs between the different outputs of the amplifier at predefined switchover times and the reference voltage of the A/D converter varies time-wise between the switching times in such a manner that at the output of the A/D converter the echo signal is present with a runtime-dependent overall amplification, which has a predefined profile.

你已经成功收藏专利！

检索式保存成功!

IPRDB

热门服务

关于我们

友情链接

联系方式