公开(公告)号：US5577048A

公开(公告)日：1996-11-19

申请号：US479183

申请日：1995-06-07

申请人： Koichi Kasa

发明人： Koichi Kasa

IPC分类号： H04B1/16 ,  H04H60/74 ,  H04Q7/06

CPC分类号： H04H20/26 ,  H04H60/74 ,  H04H20/34 ,  H04H2201/13

摘要： A program type code (PTY) burst signal detection method for a radio data system (RDS) receiver, which can automatically receive an arbitrary information program from another network from the beginning of the program. This detection method detects a PTY burst signal in RDS data, which is indicative of switching of broadcasting of an information program from another network. The PTY burst signal is defined as a signal obtained by transmitting RDS data of a group type 14A comprising an information classification code (Usage Code)=(13) in a second block several times in a short period of time. This detection method respectively compares data of three blocks at least in the 14A group, excluding the first block thereof, with data of the three blocks received earlier, and detects the PTY burst signal when every compared data matches with associated data by a predetermined number of times.

摘要翻译： 一种用于无线电数据系统（RDS）接收机的程序类型代码（PTY）突发信号检测方法，其可以从程序开始自动从另一个网络接收任意的信息程序。 该检测方法检测RDS数据中的PTY突发信号，其表示来自另一网络的信息节目的广播的切换。 PTY突发信号被定义为通过在短时间段内将包含信息分类代码（使用代码）=（13））的组类型14A的RDS数据多次地定义为获得的信号。 该检测方法分别将除了其第一块以外的14A组中的至少三个块的数据与先前接收的三个块的数据进行比较，并且当每个比较的数据与相关联的数据匹配预定数量的数据时，检测PTY突发信号 次

公开(公告)号：US5263184A

公开(公告)日：1993-11-16

申请号：US629963

申请日：1990-12-19

申请人： Tetsuo Nakamura ,  Koichi Kasa ,  Toshihito Ichikawa ,  Masahide Terada

发明人： Tetsuo Nakamura ,  Koichi Kasa ,  Toshihito Ichikawa ,  Masahide Terada

IPC分类号： H04B1/10 ,  H03G3/34 ,  H03G5/24

CPC分类号： H03G3/344 ,  H03G5/24 ,  Y10S706/90

摘要： A noise reducing circuit for a receiver such as an FM receiver which is improved in noise reducing effect while reducing an unfamiliar feeling to and an erroneous operation of the receiver. The noise reducing circuit comprises fuzzy inference means for fuzzy inferring, using an input vector consisting of several factors defining a receiving input condition as a prerequisite, in accordance with fuzzy production rules provided by membership functions of the factors of the input vector, and a fuzzy controlling signal generating circuit for generating a fuzzy controlling signal for controlling a control object amount of any one of a separation control circuit, a frequency characteristic control circuit and muting circuit or each of any combination of the circuits in accordance with a result of inference produced by the fuzzy inference means.

公开(公告)号：US5159707A

公开(公告)日：1992-10-27

申请号：US682763

申请日：1991-04-09

申请人： Kazuhiko Mogi ,  Yoshiharu Ueki ,  Shinobu Kawarada ,  Tadashi Kosuga ,  Koichi Kasa

发明人： Kazuhiko Mogi ,  Yoshiharu Ueki ,  Shinobu Kawarada ,  Tadashi Kosuga ,  Koichi Kasa

IPC分类号： H04B1/16 ,  H04B7/08 ,  H04B7/12

CPC分类号： H04B7/12 ,  H04B7/0814

摘要： A diversity receiver has distributors each of which is connected with each of a plurality of antennas, and as many antenna switches as there are receivers. Each of the antenna switches has as many contacts as there are distributors. The distributor distributes a radio frequency signal from the antenna into as many signal paths as there are receivers. Each of the antenna switches is connected with each of the distributors via the contact connected with the signal path. A demodulated signal selecting circuit has as many contacts as there are said receivers. The demodulated signal selecting circuit receives the demodulated output of the receivers via each of said second contacts to selectively output the demodulated outputs of the receivers.

摘要翻译： 分集接收器具有分配器，每个分配器与多个天线中的每一个连接，并且与接收器一样多的天线开关。 每个天线开关具有与分配器一样多的触点。 分配器将来自天线的射频信号分配成与接收器一样多的信号路径。 每个天线开关通过与信号路径连接的触点与每个分配器连接。 解调信号选择电路具有与所述接收器一样多的触点。 解调信号选择电路经由每个所述第二触点接收接收机的解调输出，以选择性地输出接收机的解调输出。

公开(公告)号：US5697080A

公开(公告)日：1997-12-09

申请号：US450952

申请日：1995-05-23

申请人： Koichi Kasa

发明人： Koichi Kasa

IPC分类号： H03J7/18 ,  H03J5/02 ,  H04B1/06 ,  H04B1/16 ,  H04B1/18

CPC分类号： H04H60/74 ,  H04H20/106 ,  H04H2201/13

摘要： A method of selecting one of broadcast waves, which are received by a receiving system for receiving the broadcast waves in each of which a sub signal including input sorting information to indicate a sort of broadcast for each of the broadcast waves is multiplexed a main signal, includes the steps of: setting a set sorting information to specify a desired sort of broadcast to be received; judging whether or not the input sorting information of each of the received broadcast waves is coincident with the set sorting information; storing the input sorting information if the input sorting information is not judged to be coincident by the judging step; firstly selecting one of the broadcast waves having the input sorting information, which is judged to be coincident by the judging step, if at least one of the input sorting information is judged to be coincident by the judging step; and secondly selecting one of the broadcast waves having the input sorting information, which is not judged to be coincident by the judging step, on the basis of the stored input sorting information if none of the input sorting information is judged to be coincident by the judging step.

摘要翻译： 选择由接收系统接收的广播波中的一个接收广播波的方法，每个广播波包括用于指示每个广播波的广播类型的输入排序信息的子信号被复用为主信号， 包括以下步骤：设置集合排序信息以指定要接收的所需广播类型; 判断每个所接收的广播波的输入排序信息是否与所设置的分类信息一致; 如果所述输入排序信息未被所述判断步骤判定为一致，则存储所述输入排序信息; 首先，通过所述判断步骤，选择所述输入排序信息中的至少一个被判断为与所述判断步骤一致的广播波中的一个，所述输入排序信息被判定为与所述判断步骤一致; 并且其次，根据所存储的输入分类信息，选择一个没有被判断为与判断步骤一致的输入排序信息的广播波，如果没有输入排序信息被判定为与判断一致 步。

公开(公告)号：US5201062A

公开(公告)日：1993-04-06

申请号：US675005

申请日：1991-03-26

申请人： Tetsuo Nakamura ,  Koichi Kasa ,  Toshihito Ichikawa

发明人： Tetsuo Nakamura ,  Koichi Kasa ,  Toshihito Ichikawa

IPC分类号： H04B1/10 ,  H04B1/16

CPC分类号： H04B1/1661 ,  H04B1/1027 ,  Y10S706/90

摘要： A noise reducing circuit for reducing various noise in the output of a receiver. A noise attenuating circuit receives a demodulated signal and attenuates the noise in the demodulated signal in accordance with a control signal supplied thereto. A signal strength detecting circuit outputs a field intensity signal indicative of a strength of a radio wave signal inputted to the receiver. An output noise level detecting circuit outputs a noise level signal indicative of a noise level in the demodulated signal after the noise is attenuated. A fuzzy inferring circuit performs fuzzy inference in accordance with fuzzy production rules given by membership functions for the field intensity signal and the noise level signal, respectively so as to output an inference output. A control signal generating circuit produces the control signal on the basis of the inference output to control the noise attenuating circuit.

公开(公告)号：US5220687A

公开(公告)日：1993-06-15

申请号：US706610

申请日：1991-05-28

申请人： Toshihito Ichikawa ,  Koichi Kasa ,  Kiichiro Akiyama

发明人： Toshihito Ichikawa ,  Koichi Kasa ,  Kiichiro Akiyama

IPC分类号： H04B1/10 ,  H04B1/12

CPC分类号： H04B1/1027 ,  H04B1/12 ,  H04B2001/1054

摘要： A radio receiver is disclosed having a wide filter and a narrow filter, each of which is connected with the front end and outputs an intermediate frequency signal. To the output of the filters are connected first and second detectors, respectively. A subtracter receives the outputs of the detectors and subtracts one from the other. A switch receives the output of the subtracter and directs the outputs of detectors in such a way that the switch is switched to a first position for directing the demodulated output from the first detector to a following circuit when the difference is below a reference level, and to a second position for directing the demodulated output from the second detector to the following circuit when the difference is above the reference level.

公开(公告)号：US4856082A

公开(公告)日：1989-08-08

申请号：US87116

申请日：1987-08-19

申请人： Koichi Kasa

发明人： Koichi Kasa

IPC分类号： H03J7/28 ,  H03J1/00

CPC分类号： H03J1/005

摘要： A reception sensitivity control system in a sweeping receiver in which a frequency dividing ratio of a phase lock loop is instantly changed from one end of the band to the other. The number of receivable stations is counted in the period of time required for the phase lock loop to adjust. If the number of stations is less than a preset minimum, the input sensitivity is increased. Thereafter, the channels are selected.

摘要翻译： 扫描接收机中的接收灵敏度控制系统，其中锁相环的分频比立即从频带的一端改变到另一端。 在锁相环调整所需的时间段内计算应收站的数量。 如果站数少于预设最小值，输入灵敏度就会增加。 此后，选择通道。