APPARATUS AND METHOD FOR MIXED SIGNAL SPREAD SPECTRUM RECEIVING TECHNIQUE
First Claim
1. A method for mixed signal spread spectrum receiving and spectrum aggregation in a receiver having at least one antenna respectively receiving at least one signal, the method comprising:
- modulating the at least one signal received by the receiver with at least one unique orthogonal pseudorandom (PN) code;
downconverting the at least one modulated signal into at least one baseband signal;
combining the at least baseband signal into an overlaid baseband signal and filtering the overlaid baseband signal;
converting the overlaid baseband signal from an analog signal into a digital baseband signal;
splitting the digital baseband signal into a plurality of signal paths each having the entirety of the digital baseband signal;
applying one of the at least one unique orthogonal PN code to each of the plurality of signal paths; and
multiplexing the plurality of signal paths into a combined digital baseband signal.
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Abstract
An apparatus and method for mixed signal spread spectrum receiving and spectrum aggregation in a receiver having at least one antenna respectively receiving at least one signal are provided. The method includes modulating the at least one signal received by the receiver with at least one unique orthogonal pseudorandom (PN) code, downconverting the at least one modulated signal into at least one baseband signal, combining the at least baseband signal into an overlaid baseband signal and filtering the overlaid baseband signal, converting the overlaid baseband signal from an analog signal into a digital baseband signal, splitting the digital baseband signal into a plurality of signal paths each having the entirety of the digital baseband signal, applying one of the at least one unique orthogonal PN code to each of the plurality of signal paths, and multiplexing the plurality of signal paths into a combined digital baseband signal.
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Citations
15 Claims
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1. A method for mixed signal spread spectrum receiving and spectrum aggregation in a receiver having at least one antenna respectively receiving at least one signal, the method comprising:
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modulating the at least one signal received by the receiver with at least one unique orthogonal pseudorandom (PN) code; downconverting the at least one modulated signal into at least one baseband signal; combining the at least baseband signal into an overlaid baseband signal and filtering the overlaid baseband signal; converting the overlaid baseband signal from an analog signal into a digital baseband signal; splitting the digital baseband signal into a plurality of signal paths each having the entirety of the digital baseband signal; applying one of the at least one unique orthogonal PN code to each of the plurality of signal paths; and multiplexing the plurality of signal paths into a combined digital baseband signal. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. An apparatus for mixed signal spread spectrum receiving and spectrum aggregation in a Frequency Division Duplex (FDD) receiver, the apparatus comprising:
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an antenna for receiving a signal; a diplexer for splitting the received signal into at least two signals having respective frequency bands; at least one duplexer for duplexing signal paths of the at least two signals having the respective frequency bands; at least one Low Noise Amplifier (LNA) for amplifying the at least two signals having the respective frequency bands; at least one In-phase Quadrature (IQ) mixer for downconverting respective outputs of the at least one LNA into at least one baseband signal; a plurality of first local oscillators for applying at least one unique orthogonal Pseudorandom (PN) code to each of the at least one baseband signal of signal paths; a signal mixer for combining each of the at least one baseband signal into an overlaid baseband signal; an Analog to Digital Converter (ADC) for converting the overlaid baseband signal into a digital baseband signal; a splitter for splitting the digital baseband signal into a plurality of identical digital baseband signals; a plurality of second local oscillators for applying the at least one unique orthogonal PN code to each of the identical digital baseband signals; at least one Digital Variable Gain Amplifier (DVGA) for amplifying each of the identical digital baseband signals; and a multiplexer for multiplexing each of the identical digital baseband signals into a multiplexed baseband signal. - View Dependent Claims (9, 10)
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11. An apparatus for mixed signal spread spectrum receiving and spectrum aggregation in a Time Division Duplex (TDD) receiver, the apparatus comprising:
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a plurality of antennas for receiving a plurality of signals; a plurality of Low Noise Amplifiers (LNAs) for respectively amplifying each of the plurality of signals; a plurality of first local oscillators for applying at least one unique orthogonal Pseudorandom (PN) code to each of the plurality of signals; a second local oscillator for combining each of the plurality of signals into an overlaid signal; an Analog to Digital Converter (ADC) for converting the overlaid signal into a digital overlaid signal; a Digital Down Converter (DDC) for converting the digital overlaid signal into a digital baseband signal and for splitting the digital baseband signal into a plurality of identical digital baseband signals; and a plurality of third local oscillators for applying the at least one unique orthogonal PN code to each of the identical digital baseband signals. - View Dependent Claims (12, 13, 14)
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15. The apparatus of claim 15, wherein the plurality of third local oscillators is included in the DDC.
Specification