发明名称 |
Direct conversion up-converter for broadband wireless access equipment |
摘要 |
A direct conversion up-converter provides direct up-conversion of a modulated broadband intermediate frequency ("IF") signal, which is on the order of 5 to 50 MHz, to a modulated radio frequency ("RF") signal, which is on the order of 70 MHz to 60 GHz. The direct up-conversion does not use super-heterodyne mixing. The direct conversion up-converter includes a demodulator unit to demodulate the modulated IF signal into a real baseband signal component ("I") and an imaginary baseband signal component ("Q"). Each basedband signal component I and Q is then amplified and passed through a bandpass filter to remove high frequency noise. The filtered baseband signal I and Q are then modulated by a modulator unit into a modulated RF signal. The demodulator unit performs the demodulation with an oscillation frequency corresponding to the modulation frequency of the modulated IF signal. The modulator unit performs the modulation with a second oscillator frequency which corresponds to a desired modulation frequency of the modulated RF signal. The demodulator unit and the modulator unit are formed from a plurality of integrated circuits disposed on a signal circuit board. |
申请公布号 |
AU5384301(A) |
申请公布日期 |
2001.09.17 |
申请号 |
AU20010053843 |
申请日期 |
2001.03.08 |
申请人 |
SPIKE BROADBAND SYSTEMS, INC. |
发明人 |
EROL KENNETH YURTKURAN;JEFFREY TONY MASTERS;DAVID SCOTT BENNETT |
分类号 |
H03D7/16 |
主分类号 |
H03D7/16 |
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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