发明名称 |
System and method for generating analog transmission signals |
摘要 |
An RF-lightwave transmitter performs successive conversions of an information-bearing input signal in order to generate an output signal suitable for transmission in a wireless communications system. The transmitter includes a high-efficiency FM laser connected to a FM discriminator. In operation, the laser converts an RF signal into a frequency-modulated optical signal, and the discriminator converts this signal into an amplitude-modulated optical signal. The discriminator performs its conversion using a high slope-efficiency linear transfer function which ensures that the AM optical signal varies in accordance with a desired operational performance. The transmitter also includes a photodiode which converts the AM signal output from the optical discriminator back into an RF signal for transmission. Experimental results demonstrated that a transmitter of this type is able to realize greater than 10 dB RF insertion gain at less than 0 dBm optical power, with a high spurious-free dynamic range and low noise. A signal processor embodied within the transmitter may be used in a purely optical communication systems or may be used for other types of RF-photonics applications such as those expected for use in next-generation systems.
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申请公布号 |
US7076170(B2) |
申请公布日期 |
2006.07.11 |
申请号 |
US20020143809 |
申请日期 |
2002.05.14 |
申请人 |
UNIVERSITY OF MARYLAND, BALTIMORE COUNTY |
发明人 |
CHOA FOW-SEN |
分类号 |
H04B10/00;H01S5/026;H01S5/062;H03D9/00;H04B10/04 |
主分类号 |
H04B10/00 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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