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1. 发明授权

US06480553B1 Gaussian frequency-shift keying transciever for ISM wideband communication 失效
标题翻译：用于ISM宽带通信的高斯频移键控转换器
公开(公告)号：US06480553B1
公开(公告)日：2002-11-12
申请号：US09191769
申请日：1998-11-13
申请人： Hsiang-Te Ho , Hsing-Ya Chiang , Sheau-Chien Wang
发明人： Hsiang-Te Ho , Hsing-Ya Chiang , Sheau-Chien Wang
IPC分类号： H04L2710
CPC分类号： H04L27/2028
摘要： A GFSK (Gaussian Frequency Shift Keying) radio transceiver is provided for ISM (Industrial Scientific and Medical) wideband communication. The GFSK radio transceiver includes a transmitter for modulating transmitted signal into RF signal, and a receiver for demodulating received signal into digital form. The transmitter includes a VCO for generating an oscillating signal serving as a carrier signal in the transmitter and a first local oscillating signal in the transmitter; and a variable-gain power amplifier, capable of being adjustable between two gain values, for amplifying the RF signal. The receiver includes a mixer for downconverting the received signal into a first IF signal by using the first local oscillating signal from the transmitter; and an IF demodulator for downconverting the first IF signal into a second IF signal by using a locally generated second local oscillating signal. The GFSK radio transceiver can operate either in half-duplex mode or full-duplex mode in a time-division duplex (TDD) system through micro-processor controls. Further, it utilizes a variable-gain power amplifier that can improve the drawbacks of interference and high power consumption with the prior art, and further utilizes a single wideband VCO to generate an oscillating signal that can be used both as the carrier signal in the transmitter and the first local oscillating signal for the receiver. This allows the GFSK radio transceiver to be implemented with a fewer number of VCOs as compared to the prior art, thus reducing the manufacturing cost.
摘要翻译：为ISM（工业科学和医疗）宽带通信提供GFSK（高斯频移键控）无线电收发器。 GFSK无线电收发器包括用于将发射信号调制成RF信号的发射机，以及用于将接收到的信号解调为数字形式的接收机。发射机包括用于产生用作发射机中的载波信号的振荡信号的VCO和发射机中的第一本地振荡信号; 以及能够在两个增益值之间调节的用于放大RF信号的可变增益功率放大器。接收机包括：混频器，用于通过使用来自发射器的第一本地振荡信号将接收的信号下变频成第一IF信号; 以及IF解调器，用于通过使用本地生成的第二本地振荡信号将第一IF信号下变频成第二IF信号。 GFSK无线电收发器可以通过微处理器控制在时分双工（TDD）系统中以半双工模式或全双工模式运行。此外，它利用可变增益功率放大器，其可以改善现有技术的干扰和高功率消耗的缺点，并且还利用单个宽带VCO来产生振荡信号，该振荡信号既可以用作发射机中的载波信号和接收机的第一本地振荡信号。与现有技术相比，这允许GFSK无线电收发器以更少数量的VCO实现，从而降低制造成本。

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