Signal polarization method, apparatus, and system

• US 8,559,888 B2
• Filed: 11/05/2012
• Issued: 10/15/2013
• Est. Priority Date: 05/06/2010
• Status: Active Grant

• Current Assignee: Huawei Technologies Co., Ltd. (Huawei Investment & Holding Co., Ltd.)
• Original Assignee: Huawei Technologies Co., Ltd. (Huawei Investment & Holding Co., Ltd.)
• Inventors: Li, Shaoming
• Primary Examiner(s): WEST, LEWIS G
• Application Number:
  US13/668,905
• Publication Number:
  US 20130059617A1
• Time in Patent Office: 344 Days
• Field of Search: 342362-365, 455/67.11, 455/63.1, 455/67.16
• US Class Current: 455/67.16
• CPC Class Codes: H01Q 1/246 specially adapted for base stations
• CPC Class Codes: H01Q 21/24 Combinations of antenna units polarised in different directions for transmitting or receiving circularly and elliptically polarised waves or waves linearly polarised in any direction circularly polarised patch antennas H01Q9/0428; circularly polarised horns H01Q13/0241; cross-polarised horns H01Q13/0258; polarisation converters H01Q15/242; cross-polarised rear feeds H01Q19/136; crossed polarisation dual antenna H01Q25/001
• CPC Class Codes: H01Q 3/26 varying the relative phase or relative amplitude of energisation between two or more active radiating elements; varying the distribution of energy across a radiating aperture H01Q3/12, H01Q3/22, H01Q3/24 take precedence
• CPC Class Codes: H04B 7/10 Polarisation diversity; Directional diversity
• CPC Class Codes: H04W 16/28 using beam steering

Abstract

The present invention discloses a signal polarization method, apparatus and system, and relates to the field of cellular network technologies. At the time of adjusting a polarization manner of a signal, an antenna does not need to be replaced, and a physical installation posture of the antenna does not need to be adjusted manually either. Therefore, a manual requirement and an operation cost are reduced, a workload, work risk and time are reduced, and a normal operation of a service of a cell is ensured. The signal polarization method provided in the embodiments of the present invention includes: receiving physical channel signals sent by a base transceiver station; determining a polarization manner of each physical channel signal; and polarizing, by adjusting at least one of an amplitude and a phase of each physical channel signal, the physical channel signals according to the polarization manner.

Claims

1. A signal polarization method, comprising:

receiving physical channel signals sent by a base transceiver station;

determining a polarization manner of each physical channel signal; and

polarizing, by adjusting at least one of an amplitude and a phase of each physical channel signal, the physical channel signals according to the polarization manner;

the polarizing, by adjusting at least one of the amplitude and the phase of each physical channel signal, the physical channel signals according to the polarization manner comprises;

distinguishing the physical channel signals two channels of signals; and

polarizing, by adjusting at least one of amplitudes and phases of the two channels of signals respectively, the physical channel signals according to the polarization manner;

the distinguishing the physical channel signals into two channels of signals comprises;

distinguishing, based on transmit power of a corresponding physical channel, the physical channel signals into two channels of signals according to the following formula;

S₊(t)=A₊exp(jφ

₊)S(t);

S₋

(t)=A₋

exp(jφ

₋

)S(t), wherein,

S(t) represents a physical channel signal, A₊ is a first amplitude parameter of S(t), φ

₊ is a first phase parameter of S(t), A₋

is a second amplitude parameter of S(t), φ

₋

is a second phase parameter of S(t), and transmit power of the physical channel to which S(t) belongs is P=A₊²+A₋

².

2. The method according to claim 1, wherein:

the polarizing, by adjusting at least one of the amplitudes and the phases of the two channels of signals respectively, the physical channel signal according to the polarization manner comprises at least one of the following adjustment;

when the polarization manner is +45°

linear polarization, adjusting A₊=√

{square root over (P)}, φ

₊=0;

A₋

=0;

when the polarization manner is −

45°

linear polarization, adjusting A₊=0;

A₋

=√

{square root over (P)}, φ

₋

=0;

when the polarization manner is vertical linear polarization, adjusting A₊=A₋

=√

{square root over (P/2)}, φ

₊=φ

₋

=0;

when the polarization manner is horizontal linear polarization, adjusting A₊=A₋

√

{square root over (P/2)}, φ

₊=0, φ

₋

=π

;

when the polarization manner is linear polarization at any angle θ

, adjusting A₊=cos θ

√

{square root over (P)}, A₋

=sin θ

√

{square root over (P)}, φ

₊=0, φ

₋

=0;

when the polarization manner is left-hand circular polarization, adjusting A₊=A₋

=√

{square root over (P/2)}, φ

₊=0, φ

₋

=π

/2;

when the polarization manner is right-hand circular polarization, adjusting A₊=A₋

=√

{square root over (P/2)}, φ

₊=0, φ

₋

=−

π

/2;

when the polarization manner is general left-hand circular polarization, adjusting

3. The method according to claim 1, further comprising:

receiving a physical channel signal sent by a terminal;

determining a polarization manner of the physical channel signal sent by the terminal; and

processing the physical channel signal in a polarization manner that is identical to the polarization manner of the physical channel signal sent by the terminal.

4. The method according to claim 3, wherein:

the determining the polarization manner of the physical channel signal sent by the terminal comprises;

adopting different polarization manners to detect the physical channel signal sent by the terminal, and using a polarization manner that corresponds to a detection result with a maximum amplitude as the polarization manner of the physical channel signal.

5. A signal polarization apparatus, comprising:

a signal transmitting and receiving unit, configured to receive physical channel signals sent by a base transceiver station;

a polarization determining unit, configured to determine a polarization manner of each physical channel signal; and

a polarization generating unit, configured to polarize, by adjusting at least one of an amplitude and a phase of each physical channel signal, the physical channel signals according to the polarization manner;

wherein the polarization generating unit comprises;

a signal distinguishing module, configured to distinguish the physical channel signals into two channels of signals; and

an amplitude/phase weighting module, configured to polarize, by adjusting at least one of amplitudes and phases of the two channels of signals, the physical channel signals according to the polarization manner, wherein the two channels of signals are obtained by the signal distinguishing module;

wherein the signal distinguishing module is specifically configured to distinguish, based on transmit power of a corresponding physical channel, the physical channel signals into two channels of signals according to the following formula;

S₊(t)=A₊exp(jφ

₊)S(t);

S₋

(t)=A₋

exp(jφ

₋

)S(t), wherein,

S(t) represents a physical channel signal, A₊ is a first amplitude parameter of S(t), φ

₊ is a first phase parameter of S(t), A₋

is a second amplitude parameter of S(t), φ

₋

is a second phase parameter of S(t), and transmit power of the physical channel to which S(t) belongs is P=A₊²+A₋

².

6. The apparatus according to claim 5, wherein:

the amplitude/phase weighting module is specifically configured to perform at least one of the following adjustment;

when the polarization manner is +45°

linear polarization, adjust A₊=√

{square root over (P)}, φ

₊=0;

A₋

=0;

when the polarization manner is −

45°

linear polarization, adjust A₊=0;

A₋

=√

{square root over (P)}, φ

₋

=0;

when the polarization manner is vertical linear polarization, adjust A₊=A₋

=√

{square root over (P/2)}, φ

₊=φ

₋

=0;

when the polarization manner is horizontal linear polarization, adjust A₊=A₋

=√

{square root over (P/2)}, φ

₊=0, φ

₋

=π

;

when the polarization manner is linear polarization at any angle θ

, adjust A₊=cos θ

√

{square root over (P)}, A₋

=sin θ

√

{square root over (P)}, φ

₊=0, φ

₋

=0;

when the polarization manner is left-hand circular polarization, adjust A₊=A₋

=√

{square root over (P/2)}, φ

₊=0, φ

₋

=π

/2;

when the polarization manner is right-hand circular polarization, adjust A₊=A₋

=√

{square root over (P/2)}, φ

₊=0, φ

₋

=−

π

/2;

when the polarization manner is general left-hand circular polarization, adjust

7. The apparatus according to claim 5, wherein:

the apparatus further includes a filter receiving unit;

wherein,

the signal transmitting and receiving unit is further configured to receive a physical channel signal sent by a terminal;

the polarization determining unit is further configured to determine a polarization manner of the physical channel signal sent by the terminal; and

the filter receiving unit is configured to process, in a polarization manner that is identical to the polarization manner of the physical channel signal sent by the terminal, the physical channel signal sent by the terminal.

8. A dual-polarized antenna system, wherein:

an antenna in the system comprises at least two polarization units, and the system comprises a signal polarization apparatus, the signal polarization apparatus comprises;

a signal transmitting and receiving unit, configured to receive physical channel signals sent by a base transceiver station;

a polarization determining unit, configured to determine a polarization manner of each physical channel signal; and

a polarization generating unit, configured to polarize, by adjusting at least one of an amplitude and a phase of each physical channel signal, the physical channel signals according to the polarization manner;

wherein the polarization generating unit comprises;

a signal distinguishing module, configured to distinguish the physical channel signals into two channels of signals; and

an amplitude/phase weighting module, configured to polarize, by adjusting at least one of amplitudes and phases of the two channels of signals, the physical channel signals according to the polarization manner, wherein the two channels of signals are obtained by the signal distinguishing module;

wherein the signal distinguishing module is specifically configured to distinguish, based on transmit power of a corresponding physical channel, the physical channel signals into two channels of signals according to the following formula;

S₊(t)=A₊exp(jφ

₊)S(t);

S₋

(t)=A₋

exp(jφ

₋

)S(t), wherein,

S(t) represents a physical channel signal, A₊ is a first amplitude parameter of S(t), φ

₊ is a first phase parameter of S(t), A₋

is a second amplitude parameter of S(t), φ

₋

is a second phase parameter of S(t), and transmit power of the physical channel to which S(t) belongs is P=A₊²+A₋

².

9. The apparatus according to claim 8, wherein:

the amplitude/phase weighting module is specifically configured to perform at least one of the following adjustment;

when the polarization manner is +45°

linear polarization, adjust A₊=√

{square root over (P)}, φ

₊=0;

A₋

=0;

when the polarization manner is −

45°

linear polarization, adjust A₊=0;

A=√

{square root over (P)}, φ

₋

=0;

when the polarization manner is vertical linear polarization, adjust A₊=A₋

=√

{square root over (P/2)}, φ

₊=φ

₋

=0;

when the polarization manner is horizontal linear polarization, adjust A₊=A₋

=√

{square root over (P/2)}, φ

₊=0, φ

₋

=π

;

when the polarization manner is linear polarization at any angle θ

, adjust A₊=cos θ

√

{square root over (P)}, A₋

=sin θ

√

{square root over (P)}, φ

₊=0, φ

₋

=0;

when the polarization manner is left-hand circular polarization, adjust A₊=A₋

=√

{square root over (P/2)}, φ

₊=0, φ

₋

=π

/2;

when the polarization manner is right-hand circular polarization, adjust A₊=A₋

=√

{square root over (P/2)}, φ

₊=0, φ

₋

=−

π

/2;

when the polarization manner is general left-hand circular polarization, adjust

10. The apparatus according to claim 8, wherein:

the apparatus further includes a filter receiving unit;

wherein,

the signal transmitting and receiving unit is further configured to receive a physical channel signal sent by a terminal;

the polarization determining unit is further configured to determine a polarization manner of the physical channel signal sent by the terminal; and

the filter receiving unit is configured to process, in a polarization manner that is identical to the polarization manner of the physical channel signal sent by the terminal, the physical channel signal sent by the terminal.

11. The system according to claim 8, wherein:

each polarization unit is connected to a transmitting and receiving link unit;

or all polarization units in the system are divided into two groups that correspond to each other, and each group of polarization units are connected to a transmitting and receiving link unit through a phase shifter or power splitter; and

the transmitting and receiving link unit is configured to receive physical channel signals from the signal polarization apparatus and send the physical channel signals to a terminal;

or receive a physical channel signal from the terminal and forward the physical channel signal to the signal polarization apparatus.

12. The system according to claim 11, further comprising an aligning unit, wherein:

the aligning unit is configured to align at least one of an amplitude, a phase, and a delay of a physical channel signal in the signal polarization apparatus and the transmitting and receiving link unit.

13. The system according to claim 8, wherein the polarization generating unit of the signal polarization apparatus further comprises a polarization combining and distinguishing module, wherein:

the polarization combining and distinguishing module, configured to;

overlay physical channel signals that are polarized in the same polarization manner and are from a base transceiver station, and send the overlaid physical channel signal to the polarization unit of the antenna;

or the polarization combining and distinguishing module is configured to;

separate physical channel signals that are received from a terminal and have the same polarization manner, so as to receive a separated physical channel signal in a polarization manner that is identical to a polarization manner of the separated physical channel signal.