Telecommunication System Using Multiple Nyquist Zone Operations

• US 20140050212A1
• Filed: 08/15/2013
• Published: 02/20/2014
• Est. Priority Date: 08/15/2012
• Status: Active Grant

• Current Assignee: CommScope Technologies, LLC (CommScope Holding Company, Inc.)
• Original Assignee: Andrew LLC (CommScope Holding Company, Inc.)
• Inventors: Braz, Oliver, Dussmann, Alfons, Hanson, Van E., Mederle, Markus, Schmidt, Nelson Christian Jr.
• Granted Patent: US 9,614,629 B2
• Time in Patent Office: Days
• US Class Current: 370/343
• CPC Class Codes: H04B 1/0007 wherein the AD/DA conversion occurs at radiofrequency or intermediate frequency stage
• CPC Class Codes: H04B 1/005 adapting radio receivers, transmitters andtransceivers for operation on two or more bands, i.e. frequency ranges
• CPC Class Codes: H04J 1/08 Arrangements for combining channels branching filters H01P1/213, H03H7/46
• CPC Class Codes: H04W 72/0453 Resources in frequency domain, e.g. a carrier in FDMA

Abstract

Telecommunication systems using multiple Nyquist zone operations are provided. In one aspect, a telecommunication system can include a first section and a second section. The first section can receive signals from at least one transmitting base station or transmitting terminal device. The received signals have frequencies in multiple frequency bands. The first section can also sample the received signals such that the received signals are aliased. The first section can also combine the aliased signals from the frequency bands into a combined frequency band in a common Nyquist zone. The second section can extract signals from the combined frequency band. The extracted signals are to be transmitted at frequencies in a frequency band from a Nyquist zone that is different than the common Nyquist zone. The second section can also transmit the extracted signals to at least one receiving base station or receiving terminal device.

Claims

1. A telecommunication system comprising:

a first section configured for;

receiving signals from at least one transmitting base station or at least one transmitting terminal device, the received signals having frequencies in a plurality of frequency bands,

sampling the received signals such that the received signals are aliased, and

combining the aliased signals from the plurality of frequency bands into a combined frequency band in a common Nyquist zone,

a second section configured for;

extracting signals from the combined frequency band, wherein the extracted signals are to be transmitted at frequencies in a frequency band from a Nyquist zone different than the common Nyquist zone, and

transmitting the extracted signals at the frequencies in the frequency band to at least one receiving base station or at least one receiving terminal device.

2. The telecommunication system of claim 1, wherein the common Nyquist zone is a first Nyquist zone and the Nyquist zone different than the common Nyquist zone is a second Nyquist zone or a third Nyquist zone.

3. The telecommunication system of claim 1, wherein the second section is further configured for:

extracting additional signals from the combined frequency band, wherein the additional extracted signals are to be transmitted at additional frequencies in an additional frequency band from a Nyquist zone used as the common Nyquist zone, and

transmitting the additional extracted signals at the additional frequencies in the additional frequency band to the at least one receiving base station or the at least one receiving terminal device.

4. The telecommunication system of claim 3,

wherein the Nyquist zone used as the common Nyquist zone is a first Nyquist zone,

wherein the Nyquist zone different than the common Nyquist zone is a second Nyquist zone or a third Nyquist zone.

5. The telecommunication system of claim 1, wherein the second section is further configured for:

extracting additional signals from the combined frequency band, wherein the additional extracted signals are to be transmitted at additional frequencies in an additional frequency band from an additional Nyquist zone different from the common Nyquist zone, and

transmitting the additional extracted signals at the additional frequencies in the additional frequency band to the at least one receiving base station or the at least one receiving terminal device.

6. The telecommunication system of claim 5,

wherein the Nyquist zone used as the common Nyquist zone is a first Nyquist zone,

wherein the Nyquist zone different than the common Nyquist zone is a second Nyquist zone,

wherein the additional Nyquist zone different than the common Nyquist zone is a third Nyquist zone.

7. The telecommunication system of claim 5, wherein the Nyquist zone different than the common Nyquist zone is not adjacent to the additional Nyquist zone different than the common Nyquist zone is a third Nyquist zone.

8. The telecommunication system of claim 5, wherein the first section comprises:

a down-conversion stage configured for down-converting the received signals to at least one intermediate frequency;

a first filter configured for selecting a first frequency band of the plurality of frequency bands corresponding to the Nyquist zone different than the common Nyquist zone;

a second filter configured for selecting a second frequency band of the plurality of frequency bands corresponding to the additional Nyquist zone different than the common Nyquist zone; and

a combiner configured for combining the received signals in the first and second frequency bands.

9. The telecommunication system of claim 8, wherein the at least one intermediate frequency comprises a first intermediate frequency and a second intermediate frequency, wherein the down-conversion stage comprises:

a first mixer configured for down-converting the received signals to the first intermediate frequency and providing the received signals at the first intermediate frequency to the first filter; and

a second mixer configured for down-converting the received signals to the second intermediate frequency and providing the received signals at the second intermediate frequency to the first filter.

10. The telecommunication system of claim 9, wherein the down-conversion stage further comprises a local oscillator configured for providing a common local oscillation signal to the first mixer and the second mixer.

11. The telecommunication system of claim 9, wherein the down-conversion stage further comprises a first local oscillator configured for providing a first local oscillation signal to the first mixer and a second local oscillator configured for providing a second local oscillation signal to the second mixer, wherein the first and second local oscillation signals have different frequencies.

12. The telecommunication system of claim 1, wherein the first section is further configured for sampling the received signals at a first sampling rate and the second section is configured for converting the digital signals to be transmitted using a second sampling rate different from the first sampling rate.

13. The telecommunication system of claim 1, wherein the telecommunication system comprises a repeater.

14. The telecommunication system of claim 13,

wherein the first section comprises:

a downlink receiver section comprising a donor antenna configured for receiving downlink signals, and

an uplink receiver section comprising a coverage antenna configured for receiving uplink signals;

wherein the second section comprises;

a downlink transmitter section comprising an additional coverage antenna configured for transmitting the downlink signals, and

an uplink transmitter section comprising an additional donor antenna configured for transmitting the uplink signals.

15. The telecommunication system of claim 1,

wherein the telecommunication system comprises a distributed antenna system;

wherein the first section comprises a master unit configured for receiving downlink signals from the at least one transmitting base station in the plurality of frequency bands; and

wherein the second section comprises a remote unit communicatively coupled to the master unit, the remote unit configured for transmitting the downlink signals extracted from the combined frequency band to the at least one receiving terminal device.

16. A method comprising:

receiving signals from at least one transmitting base station or at least one transmitting terminal device, the received signals having frequencies in a plurality of frequency bands;

sampling the received signals such that the received signals are aliased;

combining the aliased signals from the plurality of frequency bands into a combined frequency band in a common Nyquist zone;

extracting signals from the combined frequency band, wherein the extracted signals are to be transmitted at frequencies in a frequency band from a Nyquist zone different than the common Nyquist zone; and

transmitting the extracted signals at the frequencies in the frequency band to at least one receiving base station or at least one receiving terminal device.

17. The method of claim 16, further comprising:

extracting additional signals from the combined frequency band, wherein the additional extracted signals are to be transmitted at additional frequencies in an additional frequency band from a Nyquist zone used as the common Nyquist zone, and

transmitting the additional extracted signals at the additional frequencies in the additional frequency band to the at least one receiving base station or the at least one receiving terminal device.

18. The method of claim 16, further comprising:

extracting additional signals from the combined frequency band, wherein the additional extracted signals are to be transmitted at additional frequencies in an additional frequency band from an additional Nyquist zone different from the common Nyquist zone, and

transmitting the additional extracted signals at the additional frequencies in the additional frequency band to the at least one receiving base station or the at least one receiving terminal device.

19. A distributed antenna system comprising:

a master unit communicatively coupled to a base station, the master unit configured for;

receiving downlink signals from the base station, the downlink signals having frequencies in a plurality of frequency bands,

sampling the downlink signals such that the downlink signals are aliased, and

combining the aliased downlink signals from the plurality of frequency bands into a combined frequency band in a common Nyquist zone; and

a remote unit communicatively coupled to the master unit, the remote unit configured for;

extracting signals from the combined frequency band, wherein the extracted signals are to be transmitted at frequencies in a frequency band from a Nyquist zone different than the common Nyquist zone; and

transmitting the extracted signals at the frequencies in the frequency band to at least one receiving base station or at least one receiving terminal device.

20. The distributed antenna system of claim 19, wherein the remote unit is further configured for:

extracting additional signals from the combined frequency band, wherein the additional extracted signals are to be transmitted at additional frequencies in an additional frequency band from a Nyquist zone used as the common Nyquist zone, and

transmitting the additional extracted signals at the additional frequencies in the additional frequency band to the at least one receiving base station or the at least one receiving terminal device.

21. The distributed antenna system of claim 19, wherein the remote unit is further configured for:

extracting additional signals from the combined frequency band, wherein the additional extracted signals are to be transmitted at additional frequencies in an additional frequency band from an additional Nyquist zone different from the common Nyquist zone; and

transmitting the additional extracted signals at the additional frequencies in the additional frequency band to the at least one receiving base station or the at least one receiving terminal device.

22. The distributed antenna system of claim 21, wherein the master unit comprises:

a first filter configured for selecting a first frequency band of the plurality of frequency bands corresponding to the Nyquist zone different than the common Nyquist zone;

a second filter configured for selecting a second frequency band of the plurality of frequency bands corresponding to the additional Nyquist zone different from the common Nyquist zone;

a combiner configured for combining the downlink signals in the first and second frequency bands; and

an analog-to-digital converter configured for sampling the downlink signals.

23. The distributed antenna system of claim 19,

wherein the master unit comprises an analog-to-digital converter configured for sampling the downlink signals at a first sampling rate to generate digital downlink signals;

and

wherein the remote unit comprises a digital-to-analog converter configured for converting the digital downlink signals to analog downlink signals using a second sampling rate different from the first sampling rate.

24. The distributed antenna system of claim 19, wherein the master unit comprises an interpolating digital-to-analog converter, wherein the digital-to-analog converter is configured for sampling the received signals at a complex frequency-shifting sampling rate.