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公开(公告)号：WO1987005168A1
公开(公告)日：1987-08-27
申请号：PCT/US1986002703
申请日：1986-12-16
Applicant: HUGHES AIRCRAFT COMPANY
Inventor： HUGHES AIRCRAFT COMPANY , AMOROSO, Frank , CULLINGS, John, S.
IPC: H03B29/00
CPC classification number: H03B29/00
Abstract: A pseudorandom noise generator which operates in different modes. The pseudorandom noise generator (10) includes circuitry (11, 13) for providing a digital signal having a pseudorandom sequence at a selected clock rate; a modulation control circuit (15, 17, 20, 23) for selectively providing a modulation control signal that corresponds to either a non-filtered of filtered version of the digital signal, and for controlling the mode of operation of the noise generator; a modulation circuit (27, 29, 31, 33) responsive to the modulation control signal for providing a modulation signal; and a voltage controlled oscillator (VCO) (35) responsive to the modulation signal for providing a VCO output having a relatively constant output spectrum and high spectral containment for each mode of operation pursuant to control by the modulation control circuit and the modulation circuit.
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Patent Agency Ranking
公开(公告)号：WO1988001816A1
公开(公告)日：1988-03-10
申请号：PCT/US1987001998
申请日：1987-08-14
Applicant: HUGHES AIRCRAFT COMPANY
Inventor： HUGHES AIRCRAFT COMPANY , AMOROSO, Frank , TAYLOR, Norman, L.
IPC: H04K03/00
CPC classification number: H04B1/713 , H04B1/7156
Abstract: A method for achieving initial synchronization of the transmission and reception of a frequency hopped communication signal, which comprises the steps of transmitting a preamble defined by a sequence of synchronizing pulses on a single channel and transmitting random dummy pulses over the remaining channels to hide the preamble. The received signal is filtered to obtain the preamble which is then convolved with a stored replica of the preamble to produce a synchronizing signal that is used to synchronize frequency hopping of the receiver and transmitter in preparation for the transmission of information. The received, constituent pulses of the preamble are delayed and accumulated by a baseband correlator (18) to form a composite pulse whose magnitude is detected by a threshold detector (20). The threshold detector produces the synchronizing signal (22) when the accumulated pulse reaches a prescribed value indicating that all of the bits of the preamble have been received.
Abstract translation: 一种用于实现跳频通信信号的发送和接收的初始同步的方法，其包括以下步骤：在单个信道上发送由同步脉冲序列定义的前导码，并在剩余信道上发送随机伪脉冲以隐藏前导码 。 对接收的信号进行滤波以获得前导码，然后与前同步码的存储副本进行卷积，以产生同步信号，该同步信号用于同步接收机和发射机的跳频以准备信息的传输。 所接收的前导码的组成脉冲被基带相关器（18）延迟和累积，以形成由阈值检测器（20）检测其大小的复合脉冲。 当累积脉冲达到指示前同步码的所有比特已被接收到的规定值时，阈值检测器产生同步信号（22）。
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公开(公告)号：EP0258432B1
公开(公告)日：1991-02-06
申请号：EP87902879.3
申请日：1986-12-16
Applicant: Hughes Aircraft Company
Inventor： AMOROSO, Frank , CULLINGS, John, S.
IPC: H03B29/00
CPC classification number: H03B29/00
Abstract: A pseudorandom noise generator which operates in different modes. The pseudorandom noise generator (10) includes circuitry (11, 13) for providing a digital signal having a pseudorandom sequence at a selected clock rate; a modulation control circuit (15, 17, 20, 23) for selectively providing a modulation control signal that corresponds to either a non-filtered of filtered version of the digital signal, and for controlling the mode of operation of the noise generator; a modulation circuit (27, 29, 31, 33) responsive to the modulation control signal for providing a modulation signal; and a voltage controlled oscillator (VCO) (35) responsive to the modulation signal for providing a VCO output having a relatively constant output spectrum and high spectral containment for each mode of operation pursuant to control by the modulation control circuit and the modulation circuit.
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公开(公告)号：EP0280718A1
公开(公告)日：1988-09-07
申请号：EP87906124.0
申请日：1987-08-14
Applicant: Hughes Aircraft Company
Inventor： AMOROSO, Frank , TAYLOR, Norman, L.
CPC classification number: H04B1/713 , H04B1/7156
Abstract: Un procédé, qui permet d'obtenir la synchronisation initiale de l'émission et de la réception d'un signal de communication à sautillement de fréquence, consiste à émettre un signal de préambule défini par une séquence d'impulsions de synchronisation sur un seul canal et à émettre des impulsions fictives aléatoires sur les canaux restants, afin de cacher le signal de préambule. On filtre le signal reçu pour obtenir le signal de préambule, lequel est ensuite entrelacé avec une réplique stockée du signal de préambule, dans le but de produire un signal de synchronisation qu'on utilise pour synchroniser le sautillement de fréquence du récepteur et de l'émetteur en préparation pour l'émission d'informations. Les impulsions constituantes reçues du signal de préambule sont retardées et accumulées par un correlateur de bande de base (18), ce qui permet de former une impulsion composite dont l'amplitude est détectée par un détecteur de seuil (20). Le détecteur de seuil produit le signal de synchronisation (22), lorsque l'impulsion accumulée atteint une valeur pré-établie indiquant que tous les bits du signal de préambule ont été reçus.
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公开(公告)号：EP0280718B1
公开(公告)日：1992-04-15
申请号：EP87906124.0
申请日：1987-08-14
Applicant: Hughes Aircraft Company
Inventor： AMOROSO, Frank , TAYLOR, Norman, L.
IPC: H04K3/00
CPC classification number: H04B1/713 , H04B1/7156
Abstract: A method for achieving initial synchronization of the transmission and reception of a frequency hopped communication signal, which comprises the steps of transmitting a preamble defined by a sequence of synchronizing pulses on a single channel and transmitting random dummy pulses over the remaining channels to hide the preamble. The received signal is filtered to obtain the preamble which is then convolved with a stored replica of the preamble to produce a synchronizing signal that is used to synchronize frequency hopping of the receiver and transmitter in preparation for the transmission of information. The received, constituent pulses of the preamble are delayed and accumulated by a baseband correlator (18) to form a composite pulse whose magnitude is detected by a threshold detector (20). The threshold detector produces the synchronizing signal (22) when the accumulated pulse reaches a prescribed value indicating that all of the bits of the preamble have been received.
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公开(公告)号：EP0258432A1
公开(公告)日：1988-03-09
申请号：EP87902879.0
申请日：1986-12-16
Applicant: Hughes Aircraft Company
Inventor： AMOROSO, Frank , CULLINGS, John, S.
CPC classification number: H03B29/00
Abstract: Le générateur de bruit pseudo-aléatoire (10) ci-décrit, qui a différents modes de fonctionnement, comprend des circuits (11, 13), destinés à produire un signal numérique ayant une séquence pseudo-aléatoire à fréquence d'horloge choisie, un circuit de commande de modulation (15, 17, 20, 23), destiné à produire de façon sélective un signal de commande de modulation qui correspond à une version soit filtrée soit non filtrée du signal numérique et à commander le mode de fonctionnement du générateur de bruit, un circuit de modulation (27, 29, 31, 33), réagissant au signal de commande de modulation en vue de produire un signal de modulation, et un oscillateur à commande par tension (VCO) (35), réagissant au signal de modulation, en vue de fournir une sortie de (VCO) ayant un spectre de sortie relativement constant et un contenu spectral élevé pour chaque mode de fonctionnement conformément à la commande effectué par le circuit de commande de modulation et par le circuit de modulation.
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