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    • 41. 发明授权
    • Communication device capable of estimating signal quality without
synchronization pattern
    • 无需同步模式即可估计信号质量的通信设备
    • US5715240A
    • 1998-02-03
    • US642548
    • 1996-05-03
    • Jaime A. BorrasSteven C. JasperJames P. MichelsTroy J. Beukema
    • Jaime A. BorrasSteven C. JasperJames P. MichelsTroy J. Beukema
    • H04L7/00H04L7/10H04N3/06H04N3/14
    • H04L7/0004H04L7/10
    • A method determines the signal usability of an adjacent channel in a multi-cell communication system without the aid of synchronization symbols. In general, a three step search is used to arrive at the adjacent channel signal quality. The first step is a coarse timing phase search. This is accomplished through a signal quality estimates (606). The second step arrives at the optimum time phase by first interpolating (608) the received signal around the time phase selected in the first step to generate additional samples. After the interpolation (608), signal quality estimates are calculated (610) for the time phases immediately surrounding the time phase found in the first step. The optimum time phase corresponds to the maximum of these quality estimates. Finally, in the third step, the signal quality estimate is calculated for the optimum time phase. This provides the adjacent channel signal quality estimate desired.
    • 一种方法确定多小区通信系统中相邻信道的信号可用性,而不需要同步符号。 通常,使用三步搜索来获得相邻信道信号质量。 第一步是粗略的时序相位搜索。 这是通过信号质量估计来实现的(606)。 第二步通过首先内插(608)在第一步骤中选择的时间相位周围的接收信号以产生附加样本,到达最佳时间阶段。 在内插(608)之后,针对在第一步骤中发现的时间段周围的时间阶段计算信号质量估计(610)。 最佳时间段对应于这些质量估计的最大值。 最后,在第三步中,针对最佳时间阶段计算信号质量估计。 这提供了期望的相邻信道信号质量估计。
    • 46. 发明授权
    • Combined trunked/cellular communication unit
    • 组合式传感器/蜂窝通信单元
    • US5175872A
    • 1992-12-29
    • US676491
    • 1991-03-28
    • Jaime A. Borras
    • Jaime A. Borras
    • H04B1/44H04B1/48H04W88/06
    • H04B1/44H04B1/48H04W88/06
    • A communication unit (10), capable of operating in either cellular or trunked communication modes, comprises a receiver (14), a transmitter (16), and a dual synthesizer (18), coupled to the receiver and to the transmitter. The dual synthesizer comprises a main synthesizer (124) and an offset synthesizer (132). The offset synthesizer comprises a phase modulator (131) and an offset voltage-controlled oscillator (134). A protocol controller (20) comprises modulator circuitry for modulating only the offset voltage-controlled oscillator when communication unit operates in the cellular mode, and for modulating both the phase modulator and the offset voltage-controlled oscillator when the communication unit operates in the trunked mode.
    • 能够以蜂窝或集群通信模式操作的通信单元(10)包括耦合到接收机和发射机的接收机(14),发射器(16)和双合成器(18)。 双合成器包括主合成器(124)和偏移合成器(132)。 偏移合成器包括相位调制器(131)和失调压控振荡器(134)。 协议控制器(20)包括调制器电路,用于在通信单元以蜂窝模式操作时仅调制偏移压控振荡器,并且当通信单元以集群模式工作时调制相位调制器和偏移压控振荡器 。
    • 48. 发明授权
    • Method and apparatus for automatically adjusting the output power of a
transmitter
    • 自动调节变送器输出功率的方法和装置
    • US4918431A
    • 1990-04-17
    • US264387
    • 1988-10-31
    • Jaime A. Borras
    • Jaime A. Borras
    • H04B1/04H04B20060101H04B1/02H04B7/005H04B7/26
    • H04W52/288
    • A transceiver must pass through a predetermined area and receive two codes before relocating from a low power to a high power communication system (and vise versa). By determining in which order the two codes were received, the transceiver knows whether it has advanced from a low-to-high or high-to-low power communication system. Accordingly, the transceiver may adjust its transmitter power or other operational parameters to properly operate in both communication system. Also, the transceiver operates to approximate remaining battery life when it determines that it is moving from a low power to a high power mode. In this way, the transceiver may inform an operator of limited operational life in a high power mode, while the individual has an opportunity to obtain additional or a replacement battery.
    • 收发器必须通过预定区域并在从低功率重定位到高功率通信系统之前接收两个代码(反之亦然)。 通过确定接收到两个代码的顺序,收发器知道它是从高到低还是从高到低的功率通信系统。 因此,收发器可以调整其发射机功率或其他操作参数以在两个通信系统中正确地操作。 此外,收发器操作以在其确定其从低功率模式移动到高功率模式时近似剩余电池寿命。 以这种方式,收发器可以在高功率模式下通知操作者有限的使用寿命,而个人有机会获得额外的或替换的电池。
    • 50. 发明授权
    • Zone switching system for a frequency synthesized transceiver
    • 用于频率合成收发器的区域交换系统
    • US4403342A
    • 1983-09-06
    • US251644
    • 1981-04-06
    • Jaime A. BorrasRuben J. GonzalezDaniel M. SmithAlfred B. Wieczorek
    • Jaime A. BorrasRuben J. GonzalezDaniel M. SmithAlfred B. Wieczorek
    • H03C3/09H03C3/22H03D13/00H03J5/02H03K23/66H03L7/08H03L7/193H03L7/199H04B1/40
    • H03C3/0966H03C3/0933H03C3/0941H03C3/0958H03C3/227H03D13/00H03J5/0281H03K23/667H03L7/0802H03L7/193H03L7/199H04B1/405
    • A frequency synthesized transceiver capable of tuning to a plurality of communication channels is disclosed. The transceiver includes a receiver section and a transmitter section which are coupled to the synthesizer which generates the appropriate injection signals to achieve tuning. The frequency synthesizer includes a multiposition switch which accesses various addressable memory locations in a programmable read-only memory where the appropriate divisors are stored to cause tuning of the synthesizer to the appropriate communication channel. A zone selector switch enables grouping and easy retrievability of channels. The divisors are supplied to a single synchronous binary swallow counter which works in conjunction with a dual modulus prescaler to monitor the frequency output of the voltage controlled oscillator. A programmable divider coupled to a reference oscillator source is compared with the output of the synchronous counter in a digital and analog phase detector. The phase detector supplies signals through a loop filter to apply the appropriate voltage to the voltage controlled oscillator. The phase detector includes means to rapid advance the voltage controlled oscillator to cause frequency tuning.
    • 公开了能够调谐到多个通信信道的频率合成收发器。 收发器包括接收器部分和发射器部分,其耦合到合成器,其产生适当的注入信号以实现调谐。 频率合成器包括一个多位开关,该多位开关访问可编程只读存储器中的各种可寻址存储器位置,其中存储适当的除数以使合成器调谐到合适的通信信道。 区域选择开关使分组和通道容易检索。 除数被提供给单个同步二进制吞咽计数器,其与双模预分频器一起工作以监视压控振荡器的频率输出。 耦合到参考振荡器源的可编程分频器与数字和模拟相位检测器中的同步计数器的输出进行比较。 相位检测器通过环路滤波器提供信号,以将适当的电压施加到压控振荡器。 相位检测器包括用于快速推进压控振荡器以引起频率调谐的装置。