公开(公告)号：EP2845321B1

公开(公告)日：2018-01-10

申请号：EP12875751.5

申请日：2012-05-03

申请人： Telefonaktiebolaget LM Ericsson (publ)

发明人： JOHANSSON, Bernt ,  BERGLUND, Bo

IPC分类号： H04B1/00

CPC分类号： H03J7/02 ,  H04B1/0007 ,  H04B1/0067

摘要： A radio communication receiver apparatus is configured to process multiple radio frequency bands in a telecommunication system. The apparatus includes a plurality of digital receiver chains wherein each digital receiver chain is coupled to receive a digital representation of the multiple radio frequency bands, including a particular radio frequency band for processing by the respective digital receiver chain. Each digital receiver chain includes a digital receiver that is programmable to select a particular radio frequency band from the digital representation of the multiple radio frequency bands, and configured to down convert the selected radio frequency band into a digital baseband signal associated with the particular radio frequency band. Built in calibration is provided by operation of direct radio frequency technology.

公开(公告)号：EP2592759B1

公开(公告)日：2016-09-14

申请号：EP11306452.1

申请日：2011-11-08

申请人： ST-Ericsson SA

发明人： Demaj, Pierre ,  Thierion, Philippe

IPC分类号： H04B1/28 ,  H03J7/02

CPC分类号： H04B1/28 ,  H03J7/02

公开(公告)号：EP2899894A4

公开(公告)日：2016-06-22

申请号：EP13839985

申请日：2013-08-02

申请人： SHARP KK

发明人： SHITARA SHOICHI

IPC分类号： H04B1/18 ,  H03J7/02 ,  H04B1/00 ,  H04B1/04

CPC分类号： H03J7/02 ,  H03H7/40 ,  H03J2200/06 ,  H04B1/0057 ,  H04B1/0458 ,  H04B1/18

摘要： According to a wireless circuit (1), in a case where a control section (50) carries out switching between use frequency bands of an antenna (10), the control section (50) sets, in accordance with a first set value which has been adjusted by an impedance variable matching section (20) before the switching, a set value of an impedance variable matching section (20) after the switching. This prevents communication, which is carried out by the wireless circuit including the variable matching section, from being cut off when the use frequency band are switched.

公开(公告)号：EP1645033B1

公开(公告)日：2015-08-12

申请号：EP04744434.4

申请日：2004-06-30

申请人： Telefonaktiebolaget L M Ericsson (publ)

发明人： NEUMANN, Markus ,  WIPPICH, Wolfgang

IPC分类号： H03J7/04

CPC分类号： H04W56/0035 ,  H03J7/02 ,  H03L1/026 ,  H04W92/10

公开(公告)号：EP2592759A1

公开(公告)日：2013-05-15

申请号：EP11306452.1

申请日：2011-11-08

申请人： ST-Ericsson SA

发明人： Demaj, Pierre ,  Thierion, Philippe

IPC分类号： H04B1/28 ,  H03J7/02

CPC分类号： H04B1/28 ,  H03J7/02

摘要： A method for tuning an oscillator frequency produced in a radio-receiver chain is based on a slope analysis of a residual difference between said oscillator frequency and a carrier frequency of a radio-received signal (S). Depending on the slope value calculated, a bandwidth of a low-pass time-filtering effective for the frequency difference is increased or set back to a default value. The method provides improved trade-off between tuning precision and dynamic behaviour when the frequency difference drifts rapidly.

摘要翻译： 一种用于在无线电接收机链产生振荡器频率的调谐方法是基于所述振荡器频率及电波接收到的信号（S）的载波频率之间的剩余差的斜率分析。 取决于计算斜率值，一个低通滤波的时间有效的频率差的带宽增加或重新设置为一个默认值。 该方法当频率差迅速漂移提供精确调谐和动态行为之间的改进的权衡。

公开(公告)号：EP1848207A3

公开(公告)日：2010-11-10

申请号：EP07007730.0

申请日：2007-04-16

申请人： Funai Electric Co., Ltd.

发明人： Suzuki, Hirotsugu

IPC分类号： H04N5/46

CPC分类号： H04N5/46 ,  H03J1/0075 ,  H03J7/02 ,  H04N5/50

摘要： In the course of the channel presetting process, the central frequency is set by a step of 1 MHz within the range from the minimum frequency in the VHF band channel plan to the maximum frequency of the VHF band adopted in the place of destination for the scheduled shipment of the TV broadcast receivers, attempts are made to detect broadcast signals by changing frequency within a range of 1.5 MHz to the high frequency side and 0.5 MHz to the low frequency side from the central frequency, and the frequencies of the detected broadcast signals are stored in the semiconductor memory.

公开(公告)号：EP2023496A2

公开(公告)日：2009-02-11

申请号：EP08014082.5

申请日：2008-08-06

申请人： Broadcom Corporation

发明人： Castaneda, Jesus ,  Rofougaran, Maryam ,  Anand, Seema ,  Rofougaran, Ahmadreza

IPC分类号： H04B1/10 ,  H04B1/18

CPC分类号： H03D3/002 ,  H03J1/0008 ,  H03J7/02 ,  H03J2200/06 ,  H03J2200/10 ,  H04B2001/1072

摘要： An FM receiver including an FM antenna that receives continuous wavelength signals, where the FM receiver is coupled to the FM antenna and operable to alter a center frequency of a gain profile of the FM antenna. The FM receiver includes a low noise amplifier module that is coupled to amplify the continuous wavelength signal to produce an amplified RF signal therefrom. A down conversion module is coupled to mix the amplified RF signal with a local oscillation to produce an information signal. A filter module is coupled to filter the information signal to produce a filtered information signal. A demodulation module is coupled to capture audio information from the filtered information signal. A signal monitoring module is coupled to monitor the FM signal quality of a received continuous wavelength signal. The signal monitoring module produces a signal quality indication therefrom. An antenna control module produces a signal value based upon the signal quality indication, wherein the signal value operates to alter the center frequency of a gain profile of the FM antenna.

摘要翻译： 一种FM接收机，包括接收连续波长信号的FM天线，其中FM接收机耦合到FM天线并且可操作地改变FM天线的增益分布的中心频率。 FM接收器包括低噪声放大器模块，其被耦合以放大连续波长信号以从其产生放大的RF信号。 耦合降低转换模块以将放大的RF信号与本地振荡混合以产生信息信号。 滤波器模块被耦合以对信息信号进行滤波以产生经滤波的信息信号。 耦合解调模块以从经滤波的信息信号中捕获音频信息。 信号监控模块被耦合以监视所接收的连续波长信号的FM信号质量。 信号监测模块从其产生信号质量指示。 天线控制模块基于信号质量指示产生信号值，其中信号值操作以改变FM天线的增益曲线的中心频率。

公开(公告)号：EP1848207A2

公开(公告)日：2007-10-24

申请号：EP07007730.0

申请日：2007-04-16

申请人： Funai Electric Co., Ltd.

发明人： Suzuki, Hirotsugu

IPC分类号： H04N5/46

CPC分类号： H04N5/46 ,  H03J1/0075 ,  H03J7/02 ,  H04N5/50

摘要： In the course of the channel presetting process, the central frequency is set by a step of 1 MHz within the range from the minimum frequency in the VHF band channel plan to the maximum frequency of the VHF band adopted in the place of destination for the scheduled shipment of the TV broadcast receivers, attempts are made to detect broadcast signals by changing frequency within a range of 1.5 MHz to the high frequency side and 0.5 MHz to the low frequency side from the central frequency, and the frequencies of the detected broadcast signals are stored in the semiconductor memory.

摘要翻译： 在频道预设过程中，中心频率在从VHF频道频道规划中的最小频率到预定的目的地所采用的VHF频带的最大频率的范围内以1MHz的步长设置 在电视广播接收机的出货中，尝试通过在1.5MHz到高频侧的范围内改变频率并且从中心频率改变到低频侧0.5MHz来检测广播信号，并且检测到的广播信号的频率是 存储在半导体存储器中。

公开(公告)号：EP1528694A1

公开(公告)日：2005-05-04

申请号：EP04256111.8

申请日：2004-10-01

申请人： Renesas Technology Corp.

发明人： Nakagawa, Tetsuya, c/o Renesas Technology Corp. ,  Kunori, Masafumi, c/o Renesas Technology Corp.

IPC分类号： H04B7/26 ,  H04B1/38 ,  H03M7/30

CPC分类号： H03J7/02

摘要： A portable device having a communication function composed of a plurality of LSIs operated in synchronization with a clock, such as a baseband LSI and a logic LSI such as an application processor, can synchronize the baseband LSI with the logic LSI without lowering the performance of the logic LSI.
In a portable device having a communication function composed of a plurality of LSIs operated in synchronization with different clocks of a baseband LSI performing processing of modulating transmitted data and demodulating received data and an application processor performing processing of compressing transmitted data and decompressing received data, the baseband LSI has a function of detecting a frequency drift of the clock signal based on time information for synchronization included in received data and a terminal or an interface for outputting a signal including its own time information to the outside, the application processor has a terminal or an interface for inputting a signal including time information from the outside, and the signal including time information is fed from the baseband LSI to the application processor.

公开(公告)号：EP1300962A4

公开(公告)日：2004-08-11

申请号：EP02708690

申请日：2002-03-27

申请人： MITSUBISHI ELECTRIC CORP

发明人： SAKAISHI TAKUYA

IPC分类号： H04J13/00 ,  H03J7/02 ,  H03J7/04 ,  H04B1/7087 ,  H04L27/00 ,  H04L27/227 ,  H04B1/707

CPC分类号： H04L27/0014 ,  H03J7/02 ,  H03J7/04 ,  H04L27/2278 ,  H04L2027/0016 ,  H04L2027/0055 ,  H04L2027/0067 ,  H04L2027/0071 ,  H04L2027/0079

摘要： An automatic frequency control device comprising an AFC mode controller (21) for changing the operating mode in accordance with a previously calculated frequency variation, a maximum ratio synthesizing unit (23) and phase rotation amount determination units (22−1 to 22−n) for determining the amount of rotation of the phase per unit time of each output of correlators depending on the designated operating mode, a reliability calculating unit (24) and effective slot judging unit (25) both for judging the effectiveness/ineffectiveness of data in a reception slot by using the outputs of the correlators, an n−slot averaging unit (26) for averaging the amounts of rotation of phases per unit time corresponding to the effective reception slot over the n−slot time, a Df calculating unit (27) for calculating the frequency variation according to the averaged amount of rotation of phase, and a VCO control voltage calculating unit (12) for performing VCO control when the reliability of the calculated frequency variation is over a predetermined criterion.