Apparatus and method for mixed signal spread spectrum receiving technique

• US 8,861,431 B2
• Filed: 01/11/2013
• Issued: 10/14/2014
• Est. Priority Date: 01/11/2013
• Status: Expired due to Fees

• Current Assignee: Samsung Electronics Co. Ltd. (Samsung Group)
• Original Assignee: Samsung Electronics Co. Ltd. (Samsung Group)
• Inventors: Loh, Lup Meng, Brobston, Michael L.
• Primary Examiner(s): ROSE, KERRI M
• Application Number:
  US13/739,889
• Publication Number:
  US 20140198689A1
• Time in Patent Office: 641 Days
• Field of Search: 370/203, 370/208, 370/252, 370/320, 375/130, 375/140
• US Class Current: 370/320
• CPC Class Codes: H04B 1/707 using direct sequence modulation
• CPC Class Codes: H04B 7/0413 MIMO systems
• CPC Class Codes: H04J 13/12 Generation of orthogonal codes
• CPC Class Codes: H04L 27/2601 Multicarrier modulation systems

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.

Claims

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.

2. The method of claim 1, wherein each of the at least one unique PN code is different for each of the at least one signal received by the receiver.

3. The method of claim 1, where each of the at least one unique orthogonal PN code applied to each of the plurality of signal paths corresponds to one of the at least one unique orthogonal PN code modulating the at least one signal received by the receiver.

4. The method of claim 1, wherein the receiver is a Frequency Division Duplex (FDD) receiver,

wherein the at least one signal received by the at least one antenna of the FDD receiver is diplexed so as to split the signal received by the at least one antenna into at least two different signals corresponding to two different frequency bands,

wherein the at least two different signals corresponding to two different frequency bands are respectively duplexed, and

wherein the duplexed signals are amplified using a Low Noise Amplifier (LNA) before the modulating of the at least one signal received by the receiver.

5. The method of claim 1, wherein the receiver is a Time Division Duplex (TDD) receiver,

wherein each of the at least one signal received by each of the at least one antenna of the TDD receiver is amplified using a Low Noise Amplifier (LNA) before the modulating of the at least one signal received by the receiver.

6. The method of claim 5, where the splitting of the digital baseband signal into the plurality of signal paths is performed by a Digital Down Converter (DDC).

7. The method of claim 6, wherein the splitting of the digital baseband signal into the plurality of signal paths is performed before the applying of the at least one unique orthogonal PN code.

8. An apparatus for mixed signal spread spectrum receiving and spectrum aggregation in a Frequency Division Duplex (FDD) receiver, the apparatus comprising:

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.

9. The apparatus of claim 8, wherein each of the at least one unique PN code is different for each of the at least one signal received by the receiver.

10. The apparatus of claim 8, where each of the at least one unique orthogonal PN code applied to each of the plurality of signal paths corresponds to one of the at least one unique orthogonal PN code modulating the at least one signal received by the receiver.

11. An apparatus for mixed signal spread spectrum receiving and spectrum aggregation in a Time Division Duplex (TDD) receiver, the apparatus comprising:

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.

12. The apparatus of claim 11, wherein each of the at least one unique PN code is different for each of the at least one signal received by the receiver.

13. The apparatus of claim 11, where each of the at least one unique orthogonal PN code applied to each of the plurality of signal paths corresponds to one of the at least one unique orthogonal PN code modulating the at least one signal received by the receiver.

14. The apparatus of claim 11, wherein each of the plurality of signals received by each of the plurality of antennas is amplified using one of the plurality of LNAs before the applying of the at least one unique orthogonal PN code to each of the plurality of signals.

15. The apparatus of claim 11, wherein the plurality of third local oscillators is included in the DDC.