Telecommunications – Receiver or analog modulated signal frequency converter – Local control of receiver operation
Reexamination Certificate
2007-03-13
2007-03-13
Urban, Edward F. (Department: 2618)
Telecommunications
Receiver or analog modulated signal frequency converter
Local control of receiver operation
C455S139000, C455S148000, C455S330000, C455S231000, C455S255000, C455S324000, C455S265000, C375S322000, C375S324000, C375S329000
Reexamination Certificate
active
10654606
ABSTRACT:
A direct conversion receiver includes a local oscillator for generating a sinusoid, a mixer for receiving an incoming signal and for mixing the incoming signal with the sinusoid, an analog-to-digital converter for converting the mixed analog signal into a digital signal, and a digital signal processor for outputting the digital signal so that an I-channel signal and a Q-channel signal are output separately and for transmitting to the local oscillator a phase control signal that determines the phase of a sinusoid to be generated by the local oscillator. The direct conversion receiver may further include a low noise amplifier for amplifying the incoming while preventing noise included in the input signal from being amplified, a baseband amplifier for amplifying the mixed analog signal in a baseband, and a baseband low pass filter for removing low frequency noise from a signal amplified by the baseband amplifier.
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Oleg Popov
Son Mi-hyun
Chan Richard
Lee & Morse P.C.
Urban Edward F.
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