发明名称 |
Hybrid heterodyne transmitters and receivers |
摘要 |
Disclosed are hybrid heterodyne transmitters and receivers for use in communications systems, or other systems, and the corresponding methods for hybrid heterodyne transmitting and receiving. A heterodyne receiver for converting a continuous time modulated signal to a discrete time digital baseband signal includes a sigma-delta modulator. The sigma-delta modulator is a sigma-delta analog-to-digital converter constructed and arranged to receive a modulated signal at an RF carrier frequency and provide a quantized output at a first intermediate frequency. The heterodyne receiver may also include a digital mixer constructed and arranged to receive a data stream quantized by the sigma-delta analog-to-digital converter and receive a signal at a second mixing frequency. The digital mixer then provides digital signals representative of a baseband signal suitable for digital signal processing.
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申请公布号 |
US2006111074(A1) |
申请公布日期 |
2006.05.25 |
申请号 |
US20050208430 |
申请日期 |
2005.08.19 |
申请人 |
PETILLI EUGENE M;JADUS BRIAN;WASHBURN CLYDE;ALVERMANN JOHN M |
发明人 |
PETILLI EUGENE M.;JADUS BRIAN;WASHBURN CLYDE;ALVERMANN JOHN M. |
分类号 |
H04B1/26;H04B1/16;H04B15/00 |
主分类号 |
H04B1/26 |
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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