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41. 发明专利

JPS5821461B2 失效
公开(公告)号：JPS5821461B2
公开(公告)日：1983-04-30
申请号：JP8259879
申请日：1979-07-02
申请人： NIPPON TELEGRAPH & TELEPHONE
发明人： MYAJIMA TAKAHIKO , OKAMOTO SHIGEHARU , KOMAKI SHOZO
IPC分类号： H04B3/06 , H04B7/00 , H04J11/00

42. 发明专利

JPS5840938A RADIO REPEATING DEVICE 失效
公开(公告)号：JPS5840938A
公开(公告)日：1983-03-10
申请号：JP13774381
申请日：1981-09-03
申请人： NIPPON TELEGRAPH & TELEPHONE
发明人： TOOYAMA HIDEKI , OKAMOTO SHIGEHARU , NOJIMA TOSHIO
IPC分类号： H04B7/15 , H04B7/155 , H04B7/26
摘要： PURPOSE:To repeat only a desired electric wave with high efficiency, by performing self-discrimination by means of the incoming electric wave between the electric wave to be repeated and that requiring no repeating among the electric waves coming from both a radio base station and a mobile radio station. CONSTITUTION:A down-level detecting circuit 6 detects the receiving level for each channel of a down link going to a mobile radio station from a radio base station and then discriminates the channel at which the down electric wave arrives. An up-level detecting circuit 16 detects the receiving level for each channel of an up-link going to the radio base station from the mobile radio station and discriminates the channel at which the up electric wave arrives. A controller 7 specifies only the channel at which at least either one of the descending and ascending electric waves to repeat it by using the results of discrimination of the circuits 6 and 16 as input information. Channel variable amplifiers 4 and 14 are controlled by the controller 7.

43. 发明专利

JPS5817712A AUTOMATIC TRACKING TYPE NONLINEAR COMPENSATION SYSTEM 失效
公开(公告)号：JPS5817712A
公开(公告)日：1983-02-02
申请号：JP11436981
申请日：1981-07-23
申请人： NIPPON TELEGRAPH & TELEPHONE
发明人： NOJIMA TOSHIO , OKAMOTO SHIGEHARU , YUKI KIYOUJI
IPC分类号： H03F1/32 , H04B3/04
摘要： PURPOSE:To remarkbly suppress the amount of distortion in the entire amplifier system, by changing the nonlinear characteristics of a nonlinear distortion compensating circuit so that the residual distortion in the synthesized output can be decreased. CONSTITUTION:A nonlinear characteristic controller 13 controls a nonlinear distortion compensating circuit 14 so that the distortion of a unit amplifier detected with a distortion detector 12 can be minimized at first. Similarly, each nonlinear distortion compensating circuit is controlled so that the distortion of each unit amplifier up to the (n-1)th amplifier can be minimized next. Finally, the n-th non-linear distortion compensating circuit 15 is controlled so that the distortion of the synthesized output (distortion given from a distortion detector 18) of all the unit amplifiers can be minimized. Thus, the residual distortion, as a whole, of the amplifiers can remarkably be reduced. In this constitution, since it is unnecessary to provide a new automatic nonlinear distortion compensator for the entire amplifiers, the economization of the device can be attained.

44. 发明专利

JPS57150228A PROGRAMMABLE COUNTER CIRCUIT 失效
公开(公告)号：JPS57150228A
公开(公告)日：1982-09-17
申请号：JP3591581
申请日：1981-03-12
申请人： NIPPON ELECTRIC CO , NIPPON TELEGRAPH & TELEPHONE
发明人： YAMAZAKI TOYOE , KUSAMA NOBORU , OKAMOTO SHIGEHARU , NOJIMA TOSHIO
IPC分类号： H03K23/64 , H03K23/66
摘要： PURPOSE:To reduce power consumption and to obtain an economical circuit, by constituting a programmable counter circuit of 3 programmable counters and 1 preset signal circuit. CONSTITUTION:A preset signal circuit 7 is provided so that the length and the timing of a frequency-dividing output CO of a programmable counter 6 comforms with a frequency-dividing output of a prescaler 1, and an output signal is applied to a programmable counter 2 through this circuit and is preset. As a result, a preset signal applied to an input PE of the programmable counter 2 becomes a signal extending over 1 period of a count-out signal CO of the prescaler 1, and counts exactly by the number of programs. On the other hand, operating frequency of the programmable counter 2 becomes lower than the input frequency by a dividing ratio of the prescaler 1, and also operating frequencies of the programmable counter 5 and 6 becomes lower by the product of dividing ratios of the prescaler 1 and 4.

45. 发明专利

JPS54107615A HETERODYNE RADIO RELAY SYSTEM 失效
公开(公告)号：JPS54107615A
公开(公告)日：1979-08-23
申请号：JP1516378
申请日：1978-02-10
申请人： NIPPON TELEGRAPH & TELEPHONE
发明人： OKAMOTO SHIGEHARU , NOJIMA TOSHIO , OOYAMA TOORU , MORITA KOUZOU
IPC分类号： H04B7/15 , H04B7/155
摘要： PURPOSE:To cancel the non-linear distortion through the equalization of band deviation accompanied with relay every relay unit, by alternately locating the frequency convertor using upper and lower side band, as the frequency convertor to obtain the transmission signal of each relay unit. CONSTITUTION:In the relay unit R1, frequency f1F is inputted from the intermediate frequency input terminal 11, f1F is frequency converted with the frequency fL1 from the transmission local oscillator 13 at the transmission frequency convertor 12, the output signal x1(t) of frequency f1 is amplified with the transmission power amplifier 14, and the amplified signal y1(t) is transmitted to the relay station R2 via the transmission antenna 25. The signal in f1 is frequency converted with the signal from the local oscillator 18 at the frequency convertor 17, f1F being obtained. f1F is equalized at the equalizer 19, the equalized output is frequency-converted in frequency fL2 of the local oscillator 22 at the frequency convertor 21, being frequency f2, and the amplified signal y2(t) is fed to the relay unit at next stage via the power amplifier 23 and the antenna 24.

46. 发明专利

JPS5484413A HETERODYNE REPEATING SYSTEM 失效
公开(公告)号：JPS5484413A
公开(公告)日：1979-07-05
申请号：JP15262477
申请日：1977-12-19
申请人： NIPPON TELEGRAPH & TELEPHONE
发明人： NOJIMA TOSHIO , OOYAMA TOORU , OKAMOTO SHIGEHARU
IPC分类号： H04B3/36 , H04B7/005 , H04B7/15 , H04B7/155
摘要： PURPOSE:To reduce the distortion noise phase for the multiple heterodyne repeating system by using at least one unit of the heterodyne for the upper and lower side band waves contained in the output of the up-converter. CONSTITUTION:The signal sent from transmission input terminal 18 undergoes the frequency conversion into the carrier wave of the upper side band through up- converter 21 by the carrier signal sent from carrier signal source 19 and is then amplified via transmission power amplifier 22 to be transmitted to reception antenna 11 of the repeating installation through transmission antenna 23. Up-converter 15 of the repeating installation undergoes the frequency conversion into the carrier wave band via the lower side band wave. Thus, the 3rd distortion emerging at the output of power amplifier 16 after generated at power amplifier 22 and the 3rd distortion generated at power amplifier 16 feature the phase shifted by pi radian to each other since the pass side wave bands differ at frequency converter 21 and 15 respectively. As a result, the 3rd distortion can be suppressed.

47. 发明专利

JPS5442919A MONITOR SYSTEM FOR DISTORTION NOISE 失效
公开(公告)号：JPS5442919A
公开(公告)日：1979-04-05
申请号：JP10879177
申请日：1977-09-12
申请人： NIPPON TELEGRAPH & TELEPHONE
发明人： SUZUKI RIYOUTA , OKAMOTO SHIGEHARU
IPC分类号： H04B17/00 , H04B17/16 , H04B17/40
摘要： PURPOSE:To ensure a high-efficiency maintenance for the system by measuring the distortion noise with every repeater in the SSB communication system and others.

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