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1. 发明授权

US5697049A Radio relay method, radio relay system using the method and radio unit 失效
标题翻译：无线中继方式，无线中继系统采用该方法和无线单元
公开(公告)号：US5697049A
公开(公告)日：1997-12-09
申请号：US223976
申请日：1994-04-06
申请人： Mitsuo Shiraishi , Sakari Ohira , Fujio Sumi
发明人： Mitsuo Shiraishi , Sakari Ohira , Fujio Sumi
IPC分类号： H04B1/38 , H04B7/15 , H04B7/26 , H04W16/26 , H04W84/08
CPC分类号： H04B7/2606
摘要： A radio relay communication system wherein a signal transmitted from active one of a plurality of radio units is received and recorded. When the transmission operation of the particular radio unit stops, the recorded signal is reproduced and transmitted by a relay unit, and another radio unit receives the signal from the relay unit. A relay start signal is transmitted from the first radio unit. and is received by the relay unit. In response to the relay start signal, the relay unit generates a sync signal of predetermined period. The first radio unit, in accordance with the reception of the sync signal, transmits an input signal as compressed to less than one half along the time axis. The relay unit alternates between the period of receiving the compressed signal and the period of transmission in synchronism with the sync signal. The compressed signal transmitted from the relay unit during the transmission period is received by the second radio unit and expanded along the time axis thereby to reproduce the input signal.
摘要翻译：一种无线电中继通信系统，其中从多个无线电单元中的一个无线电单元发送的信号被接收和记录。当特定无线电单元的发送操作停止时，由中继单元再现和发送所记录的信号，另一个无线电单元接收来自中继单元的信号。从第一无线电单元发送继电器开始信号。并由中继单元接收。响应于继电器开始信号，中继单元产生预定周期的同步信号。第一无线电单元根据同步信号的接收，沿着时间轴将压缩的输入信号发送到不到一半的位置。中继单元在与同步信号同步的接收压缩信号的周期和传输周期之间交替。在发送期间从中继单元发送的压缩信号由第二无线单元接收并沿着时间轴扩展，从而再现输入信号。

2. 发明授权

US5490167A Duplex voice communication radio transmitter-receiver 失效
标题翻译：双工语音通信无线电发射机 - 接收机
公开(公告)号：US5490167A
公开(公告)日：1996-02-06
申请号：US671821
申请日：1991-03-28
申请人： Fujio Sumi , Susumu Nakabayashi , Sakari Ohira , Kouichi Ishikawa
发明人： Fujio Sumi , Susumu Nakabayashi , Sakari Ohira , Kouichi Ishikawa
IPC分类号： H04B1/56 , H04B1/66 , H04B1/38 , H04L5/14
CPC分类号： H04B1/56 , H04B1/662
摘要： A duplex voice communication radio transmitter-receiver according to the present invention is provided with a low-pass filter arranged before a time compressing device in a transmitter section for cutting off a higher frequency portion of the band of a voice signal thus to decreasing the maximum modulation frequency of the same to less than a half so that it can be operated with the use of an assigned, single frequency transmission radio wave of which frequency band is legally limited, improved in the utilization of frequencies, minimized in the delay of communication signals, and enhanced in the articulation and intelligibility of a reproduced voice sound.
摘要翻译： PCT No.PCT / JP90 / 01014 Sec。 371日期1991年3月28日 102（e）1991年3月28日PCT PCT 1990年8月8日PCT公布。出版物WO91 / 02414 日本1991年2月21日。根据本发明的双工语音通信无线电发射机 - 接收机具有布置在发射机部分中的时间压缩装置之前的低通滤波器，用于切断频带的较高频率部分语音信号从而将其最大调制频率降低到小于一半，使得其可以使用被规定的单频发射无线电波进行操作，频率在法律上受限制，频率的利用得到改善，在通信信号的延迟中最小化，并且增强了再现的语音的清晰度和清晰度。

3. 发明授权

US5493698A Radio apparatus for simulataneously transmitting and receiving signals using a simple frequency 失效
标题翻译：使用简单频率同时发送和接收信号的无线电设备
公开(公告)号：US5493698A
公开(公告)日：1996-02-20
申请号：US202217
申请日：1994-02-25
申请人： Osamu Suzuki , Kazuo Suzuka , Mitsuo Shiraishi , Sakari Ohira , Fujio Sumi , Kenichi Suzuki
发明人： Osamu Suzuki , Kazuo Suzuka , Mitsuo Shiraishi , Sakari Ohira , Fujio Sumi , Kenichi Suzuki
IPC分类号： H04B1/40 , H04B1/66 , H04B1/00
CPC分类号： H04B1/40 , H04B1/662
摘要： A radio apparatus having a unit for receiving a first signal from a first transceiver compressed in time by a predetermined rate, a unit for reproducing a first original signal from the first signal, a unit for receiving a second signal from a second transceiver compressed by the predetermined rate during the reception period of the first transceiver, a unit for reproducing a second original signal from the second signal, and a unit for adding the first and second original signals and outputting the added signal.
摘要翻译：一种无线电设备，具有用于从第一收发机接收预定速率的时间压缩的第一信号的单元，用于从第一信号再现第一原始信号的单元，用于从由第一信号压缩的第二收发器接收第二信号的单元在第一收发器的接收期间的预定速率，用于从第二信号再现第二原始信号的单元，以及用于相加第一和第二原始信号并输出相加信号的单元。

4. 发明授权

US5633862A DTMF signal transmission method in single frequency simultaneous transmitting and receiving system and single frequency simultaneous transmitting and receiving system transceiver capable of transmitting DTMF signal 失效
标题翻译：单频同时发射和接收系统中的DTMF信号传输方法和能够发送DTMF信号的单频同时发射和接收系统收发器
公开(公告)号：US5633862A
公开(公告)日：1997-05-27
申请号：US330676
申请日：1994-10-28
申请人： Kenichi Suzuki , Sakari Ohira , Fujio Sumi , Osamu Suzuki
发明人： Kenichi Suzuki , Sakari Ohira , Fujio Sumi , Osamu Suzuki
IPC分类号： H04L5/16 , H04B14/00 , H04M1/50 , H04M3/02 , H04Q1/457 , H04Q7/38 , H04B1/56
CPC分类号： H04M3/02 , H04Q1/4575 , H04M1/50
摘要： In radio communication system in which single frequency simultaneous transmission and reception is performed, a speech audio signal is divided by a predetermined time interval. A transmission time and a reception time are allotted in the predetermined time. A time-compressed signal is transmitted during the transmission time, and a time-compressed signal transmitted from other transceiver is received during the reception time and it is decompressed to the original length. The transmission time and the reception time are alternately repeated to transmit and receive the audio signals substantially simultaneously by a single frequency, and the audio signal is reproduced from the received signal. When communication with a telephone set is to be established, a DTMF signal is used as a dialing signal to call the telephone set from the transceiver. The DTMF signal is time-compressed and then transmitted along with the speech signal. A transmission timing of the DTMF signal is controlled, and the generated DTMF signal is temporarily stored in a memory. When the transmission of the DTMF signal can be completed before the transmission time is switched to the reception time is determined, and if it can, the DTMF signal is read from the memory and transmitted.
摘要翻译：在执行单频同时发送和接收的无线电通信系统中，语音音频信号被划分预定的时间间隔。传输时间和接收时间在预定时间内被分配。在发送时间期间发送时间压缩信号，并且在接收时间期间接收从其他收发器发送的时间压缩信号，并将其解压缩为原始长度。交替地重复发送时间和接收时间，以单个频率基本上同时发送和接收音频信号，并且从接收到的信号再现音频信号。要建立与电话机的通信时，将使用DTMF信号作为从收发机呼叫电话机的拨号信号。 DTMF信号被时间压缩，然后与语音信号一起传输。控制DTMF信号的发送定时，将生成的DTMF信号暂时存储在存储器中。当在传输时间切换到接收时间之前可以完成DTMF信号的传输，并且如果可以，则从存储器读取DTMF信号并发送。

5. 发明授权

US5524274A Transceiver controlled by absence/presence of input signal 失效
标题翻译：收发器由输入信号的不存在/存在控制
公开(公告)号：US5524274A
公开(公告)日：1996-06-04
申请号：US226830
申请日：1994-04-13
申请人： Norio Takahashi , Nobuo Sekiguchi , Sakari Ohira , Fujio Sumi
发明人： Norio Takahashi , Nobuo Sekiguchi , Sakari Ohira , Fujio Sumi
IPC分类号： H04B1/46 , H04B1/54 , H04B1/56 , H04B1/66 , H04J3/06 , H04J3/18
CPC分类号： H04B1/56 , H04B1/662
摘要： A transceiver having a transmitting unit and a receiving unit for performing substantially simultaneous communication with another transceiver in both directions by using a single frequency carrier. The transceiver includes a unit for generating a synchronizing signal for alternately switching between a transmission time period and a reception time period of the transceiver at a predetermined period, a signal processing unit for converting an input signal into a compressed signal by compressing a time axis of the input signal by a predetermined ratio, and affixing the synchronizing signal to the compressed signal, a unit for supplying the compressed signal with the synchronizing signal to the transmitting unit during the transmission time period, and a unit for reproducing an original signal from a signal transmitted from the other transceiver and received by the receiving unit during the reception time period, by expanding a time axis of the signal by a predetermined ratio. The transceiver further includes a signal detecting unit for detecting an absence/presence of the input signal and generating an output signal corresponding the absence/presence, and a control unit for controlling the operation of the signal processing unit in accordance with the output signal of the signal detecting unit. The control unit controls operation of the signal processing unit to transmit only a signal related to the synchronizing signal to the other transceiver, when the signal detecting unit generates the output signal representing an absence of the input signal for a predetermined time period.
摘要翻译：一种具有发射单元和接收单元的收发器，用于通过使用单个频率载波在两个方向上执行与另一收发器的基本上同时的通信。收发器包括用于产生用于在预定周期内在发送时间段和收发器的接收时间段之间交替切换的同步信号的单元，用于通过压缩时间轴将输入信号转换成压缩信号的信号处理单元以预定比例输入信号，并将该同步信号附加到压缩信号;在发送期间向发送单元提供具有同步信号的压缩信号的单元，以及用于从信号再现原始信号的单元从另一收发器发送并在接收时间段期间由接收单元接收，通过以预定比例扩展信号的时间轴。收发信机还包括信号检测单元，用于检测输入信号的不存在和存在，并产生对应于不存在/不存在的输出信号;以及控制单元，用于根据信号处理单元的输出信号控制信号处理单元的操作信号检测单元。当信号检测单元产生表示在预定时间段内输入信号不存在的输出信号时，控制单元控制信号处理单元的操作，以仅将与同步信号相关的信号发送到另一收发器。

6. 发明授权

US5355363A Voice transmission method and apparatus in duplex radio system 失效
标题翻译：双工无线电系统中的语音传输方法和装置
公开(公告)号：US5355363A
公开(公告)日：1994-10-11
申请号：US27479
申请日：1993-03-08
申请人： Katsumi Takahashi , Takashi Kurokawa , Nobuo Sekiguchi , Kazuo Suzuka , Sakari Ohira , Kiyoyuki Isawa , Fujio Sumi , Kenichi Suzuki
发明人： Katsumi Takahashi , Takashi Kurokawa , Nobuo Sekiguchi , Kazuo Suzuka , Sakari Ohira , Kiyoyuki Isawa , Fujio Sumi , Kenichi Suzuki
IPC分类号： H04B1/56 , H04B1/66 , H04J3/22
CPC分类号： H04B1/56 , H04B1/662
摘要： A voice transmission method and apparatus in a duplex radio system are disclosed in which a voice signal to be transmitted in a constant period of time is subjected to 1/N time compression, N being a numeral not smaller than 2.0. The time-compressed voice signal is supplied to a transmitter as a modulating signal and a transmitting operation is performed by the transmitter in synchronism with a period of time when the modulating signal is inputted to the transmitter. A receiving operation of receiving a time-compressed and modulated signal transmitted from the transmitter to demodulate it is performed by a receiver in a period of time other than the period of time when the transmitting operation is performed. A demodulated signal is subjected to N-ple time expansion to obtain a reproduced receive voice signal, and both the transmitting operation and the receiving operation are repeated at the constant period of time. In the voice transmission method and apparatus, a predetermined band of a signal corresponding to said signal to be transmitted, which is in a voice band, is extracted with a predetermined band width. The extracted signal is shifted to any band which is in the voice band and is other than the extracted band. A signal corresponding to the shifted signal is supplied to the transmitter as the modulating signal.
摘要翻译：公开了一种在双工无线电系统中的语音传输方法和装置，其中要在一定时间内发送的语音信号经受1 / N时间压缩，N是不小于2.0的数字。将时间压缩的语音信号作为调制信号提供给发射机，并且由发射机与调制信号输入到发射机的时间同步地执行发射操作。从发送器发送的时间压缩和调制信号接收解调的接收操作由接收机在执行发送操作的时间段之外的时间段内执行。对解调信号进行N次时间扩展，以获得再现的接收语音信号，并且在恒定时间段重复发送操作和接收操作。在语音传输方法和装置中，以预定的带宽提取与声音频带中的要发送的信号相对应的信号的预定频带。所提取的信号被移动到在声频带中的任何频带，并且不是所提取的频带。与移位信号相对应的信号作为调制信号提供给发射机。

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