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1.发明授权Local area network for flexible digital communications within and between RF base stations 失效RF基站之间和之间灵活数字通信的局域网
公开(公告)号：US5305467A
公开(公告)日：1994-04-19
申请号：US620423
申请日：1990-12-03
CPC分类号： H04W84/08 , H04B1/40 , H04W4/10 , H04W76/005
摘要： A LAN multi-node generic digital signal communications link within a radio frequency (RF) base station system communicates control signals within and between base stations. The generic digital signal link eliminates the use of multiple lines for respective functions by using the same generic communications interface for various different functions. By using such a generic digital signal link for inter and intra base station communications, RF and auxiliary control become standardized--reducing complexity in the product, in the documentation and in field repair techniques.
摘要翻译： 射频（RF）基站系统内的LAN多节点通用数字信号通信链路在基站内和基站之间传送控制信号。 通用数字信号链路通过为各种不同的功能使用相同的通用通信接口消除了对相应功能的多条线路的使用。 通过使用这种通用的数字信号链路进行帧间和内部基站通信，RF和辅助控制变得标准化 - 降低产品的复杂性，在文档和现场修复技术中。
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2.发明授权Full duplex RF repeater/base station providing microprocessor-controlled simultaneous CTCSS tone encode/decode 失效全双工RF中继器/基站提供微处理器控制的同时CTCSS音调编码/解码
公开(公告)号：US5327580A
公开(公告)日：1994-07-05
申请号：US70030
申请日：1993-06-01
摘要： A microcomputer within a duplex RF transceiver operates in an interrupt-driven manner to simultaneously encode and decode CTCSS signalling (with one microcomputer interrupt service routine being devoted to CTCSS encode, and another microcomputer interrupt service routine being devoted to CTCSS decode). Such encoding and decoding of CTCSS signalling is accomplished using minimal external control hardware (e.g., two flip flops and an inexpensive conventional multipurpose counter/timer chip). The resulting arrangement is inexpensive, reliable and requires only a few components in addition to the appropriately programmed microcomputer in order to provide simultaneous encoding and decoding of CTCSS signals in a full duplex RF transceiver context.
摘要翻译： 双工RF收发器中的微型计算机以中断驱动的方式工作，以同时编码和解码CTCSS信令（一个专用于CTCSS编码的一个微计算机中断服务程序，另一个专用于CTCSS解码的微计算机中断服务程序）。 使用最小的外部控制硬件（例如，两个触发器和廉价的常规多用途计数器/定时器芯片）来实现CTCSS信令的这种编码和解码。 所得到的布置是廉价的，可靠的，并且除了适当编程的微计算机之外仅需要少量组件，以便在全双工RF收发器环境中提供CTCSS信号的同时编码和解码。
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公开(公告)号：US5295178A
公开(公告)日：1994-03-15
申请号：US620421
申请日：1990-12-03
摘要： A digital FM base station radio having a dedicated digital signal processing (DSP) board operates on audio signals from RF links and land lines. The DSP board detects, filters and generates tones and communicates information regarding these tones to a controller microprocessor on the central control board for the radio.
摘要翻译： 具有专用数字信号处理（DSP）板的数字FM基站无线电台对来自RF链路和陆线的音频信号进行操作。 DSP板检测，过滤和产生音调，并将有关这些音调的信息传送到无线电中央控制板上的控制器微处理器。
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4.发明授权
公开(公告)号：US5241689A
公开(公告)日：1993-08-31
申请号：US624732
申请日：1990-12-07
摘要： A radio frequency (RF) base station transmitter receiver (transceiver) system includes an audio compression arrangement that compresses a sum of multiple audio signals so that all signals within the sum are equalized to a substantially uniform audio output level despite differences in their input levels. Compression thresholds can be adjusted from a remote location. The RF base station provides audio signal compression using digital signal processing (DSP) techniques such that advanced features (e.g., noise blanking and hard limiting) and flexibility are built into the system. Line audio inputs from several sources are filtered, converted to digital signals, and processed by a digital signal processor (DSP). This DSP provides an audio compression function that selects and applies appropriate gains to the digitized audio signal. The compressed signal is converted to analog form, filtered and routed to a variety of destination such as a RF transmitter modulator or a land line.
摘要翻译： 无线电频率（RF）基站发射机接收机（收发机）系统包括压缩多个音频信号之和的音频压缩装置，使得尽管它们的输入电平有所差异，总和内的所有信号均等于基本均匀的音频输出电平。 可以从远程位置调整压缩阈值。 RF基站使用数字信号处理（DSP）技术来提供音频信号压缩，使得系统内置高级特征（例如，噪声消隐和硬限制）和灵活性。 来自多个源的线路音频输入被滤波，转换成数字信号，并由数字信号处理器（DSP）处理。 该DSP提供了一种音频压缩功能，可以对数字化的音频信号选择并应用适当的增益。 压缩信号被转换为模拟形式，经滤波并路由到各种目的地，例如RF发射机调制器或陆线。
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