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    • 38. 发明授权
    • Multiple cavity tuning of a transmitter output in a communication system
    • 通信系统中发射机输出的多腔调谐
    • US5263047A
    • 1993-11-16
    • US907981
    • 1992-07-02
    • Michael D. KotzinStephen L. Spear
    • Michael D. KotzinStephen L. Spear
    • H04B1/713H04B1/7136H04L27/30
    • H04B1/7136H04B1/713H04B2001/71362
    • A base-site (304) combines baseband frequency hopping and fast-synthesizer hopping to produce an economical frequency hopping communication system (300). The base-site (304) combines the fast-synthesizer frequency hopping capability of transmitters (307-309) with baseband frequency hopping to produce a frequency hopping communication system (300) which serves the same number of subscribers served by transmitters (208-213) in a purely baseband hopping communication system (200), but with fewer transmitters (307-309). The implementation of frequency-selective cavities (312-317) having very low loss eliminates the need for wideband hybrid combiners (112-114), which in turn eliminates transmitted-signal power loss experienced in a purely fast-synthesizer frequency hopping communication system (100).
    • 基站(304)组合基带跳频和快速合成器跳频以产生经济的跳频通信系统(300)。 基站(304)将发射机(307-309)的快速合成器跳频能力与基带跳频组合,以产生跳频通信系统(300),跳频通信系统(300)服务于发射机服务的相同数量的用户(208-213 )在纯基带跳频通信系统(200)中,但是具有较少的发射机(307-309)。 具有非常低损耗的频率选择腔(312-317)的实现消除了对宽带混合组合器(112-114)的需要,这又消除了纯快速合成器跳频通信系统中经历的发射信号功率损耗( 100)。
    • 39. 发明授权
    • Data throughput enhancement
    • 数据吞吐量增强
    • US5077741A
    • 1991-12-31
    • US446279
    • 1989-12-05
    • Michael D. Kotzin
    • Michael D. Kotzin
    • G06F11/08H04B7/26H04W88/18
    • H04W88/181G06F11/08
    • A method comprising distributing channel coding on either side of a limited capacity communication path by partially channel coding a signal at a first processing point and communicating the partially coded signal over the communication path to a second processing point. The partially coded signal comprises at least some but not all of the necessary coded bits. The channel coding algorithm is completed at the second processing point using the communicated partially coded signal thereby increasing throughput over the limited capacity path while minimizing added delays.
    • 一种方法,包括在有限容量的通信路径的任一侧通过在第一处理点处对信号进行部分信道编码,并将所述部分编码的信号通过所述通信路径传送到第二处理点来分配信道编码。 部分编码的信号包括至少一些但不是全部必需的编码比特。 信道编码算法在第二处理点使用传送的部分编码的信号完成,从而增加了限制容量路径上的吞吐量,同时最小化了附加的延迟。
    • 40. 发明授权
    • Text modifier
    • 文字修饰符
    • US5014313A
    • 1991-05-07
    • US376776
    • 1989-07-07
    • Michael D. Kotzin
    • Michael D. Kotzin
    • H04L9/18
    • H04L9/065H04L2209/046H04L2209/12
    • A method is disclosed and apparatus is described whereby plain text is modified before it is input to a binary key generator (encryptor). According to the invention, a plain text bit may be modified by a current modifying bit, which in turn, is based on a prior modifying bit, a prior plain text bit, and a prior ciphered text bit. The only data path provided to the transmitter is the encrypted key generator cipher text output. As a result, the only feed-foward path of the plain text to the channel is through the key generator, and thus the fault-immune physical barrier between the plain text and the cipher information inherent with the key generator is maintained. The invention provides a way of utilizing conventional binary key generators to digitally encrypt for radio transmission multilevel sub-band coded speech.
    • 公开了一种方法,其中描述了在将文本输入二进制密钥生成器(加密器)之前对其进行修改的装置。 根据本发明,明文位可以由当前修改位修改,而当前修改位依次是先前的修改位,先前的纯文本位和先前的加密文本位。 提供给发送器的唯一数据路径是加密的密钥生成器密文输出。 因此,纯文本到信道的唯一馈送路径是通过密钥生成器,从而保持明文与密钥生成器固有密码信息之间的无故障物理屏障。 本发明提供了利用传统二进制密钥发生器对无线电传输多电平子带编码语音进行数字加密的方法。