CN100527895C - CDMA-TDMA intelligent antenna transceiving method and device - Google Patents
CDMA-TDMA intelligent antenna transceiving method and device Download PDFInfo
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- CN100527895C CN100527895C CNB2007100244824A CN200710024482A CN100527895C CN 100527895 C CN100527895 C CN 100527895C CN B2007100244824 A CNB2007100244824 A CN B2007100244824A CN 200710024482 A CN200710024482 A CN 200710024482A CN 100527895 C CN100527895 C CN 100527895C
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
- Y02D30/00—Reducing energy consumption in communication networks
- Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks
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Abstract
The method includes steps: in device including send receive circuit of communication base station, sending QPSK signal to inverse modulation circuit of middle setting code makes multiplication between QPSK signal and local middle setting code; adjusting local middle setting phase to align to the middle setting phase of QPSK signal; sending filtered coherent carrier to weighting circuit of reception to carry out addition; sending the output signal of beam forming and power measuring circuit to the weighting circuit of reception, and adjusting phase of coherent carrier of reception till maximum output power is obtained; the weighted value at this time is as value of transmitting circuit; executing each steps of directional transmitting signal so as to complete send receive signal. Using equipment in smaller power, the method implements transmitting signal in larger power in system of space division multiple access (SDMA) so as to raise use factor of transmitting power remarkably.
Description
Technical field
The present invention relates to the desired space division multiple access method of a kind of TD-SCDMA of realization (time division SCDMA) standard, also relate to the mobile communication base station transceiver equipment of realizing this method simultaneously, especially use the TD-SCDMA base station transceiver equipment of smart antenna, belong to the mobile communication technology field.
Background technology
Using the TD-SCDMA base station transceiver equipment of smart antenna is the high-tech product of moving communicating field.This high technology equipment is used for the base station sender of TD-SCDMA mobile communication standard, and the liaison between realization and mobile phone also can reduce the influence of multi-user interference.According to the related data analysis of announcing,, realize that difficulty is bigger because the defined smart antenna of TD-SCDMA standard is very complicated when many code channels are used.The result causes the decline of sub-district actual downstream number of users and the power of sending out of requirement to rise, and the equipment cost performance of making declines to a great extent.
Summary of the invention
The objective of the invention is: on the basis of TD-SCDMA standard, propose a kind of on/intelligent antenna message transceiving method and the equipment of descending respectively employing code division multiple access/time division multiple access, in order to realize the positioning transceiving of signal, thereby realize high-power posting a letter with low-power equipment, significantly improve and send out power utilization.
In order to reach above purpose, CDMA-TDMA intelligent antenna transceiving method of the present invention is applied in the communication base station equipment that contains transceiver circuit, finishes the positioning transceiving of signal according to the following steps:
1) midamble of the QPSK signal that collection of letters antenna is received is sent into the contrary modulation circuit of midamble, and the contrary modulation circuit of described midamble contains multiplier, narrow band filter and adder;
2) the local midamble conversion of signals that local midamble generation module is generated becomes the multiple laggard horizontal phasing control of midamble;
3) when the midamble phase alignment of the phase place of multiple midamble and QPSK signal, the midamble of multiple midamble and QPSK signal is delivered to midamble multiply each other against the multiplier of modulation circuit;
4) signal after will multiplying each other send narrow band filter, reverts to collection of letters quadrature carrier after the filtering;
5) quadrature carrier is sent into adder, obtain the coherent carrier of collecting mail after the addition, be transported to collection of letters weighting circuit;
6) control collection of letters weighting circuit by the output signal of wave beam formation and power-measuring circuit, by the phase place of phase shifter adjustment collection of letters coherent carrier corresponding in the collection of letters weighting circuit, until its send into that wave beam forms and power-measuring circuit in the homophase superposition obtain peak power output;
Determined phase shifter weights (phase shift value) during 7) by Maximum Power Output, the DOA that determine to collect mail number;
Weights during 8) with above-mentioned Maximum Power Output transmit by antenna direction as the weights of the weighting circuit of posting a letter in the transmitting circuit.
Because above-mentioned wave beam formation and power-measuring circuit are equivalent to the antenna pattern of collection of letters antenna is aimed at signalling travelling carriage orientation of living in when recording maximum power value, and the phase shift value of inciting somebody to action this moment is delivered to the weighting circuit of posting a letter in the downlink wave beam formation equipment component, then can make the antenna pattern of base station transmission antenna also aim at the residing orientation of travelling carriage, therefore can finish directional transmissions.
The CDMA-TDMA intelligent antenna transceiving equipment of realizing said method comprises collection of letters circuit and transmitting circuit, wherein comprises:
Collection of letters antenna, its output connects the first input end of the contrary modulation circuit of midamble by collection of letters radio circuit, sends into the contrary modulation circuit of midamble in order to the midamble of the QPSK signal that will receive;
Local midamble produces, the multiple processing and phase adjusting module, and second input of the contrary modulation circuit of its output termination midamble in order to generating local corresponding midamble signal, and converts the laggard horizontal phasing control of multiple midamble to;
The contrary modulation circuit of midamble contains multiplier, narrow band filter and adder, in order to
---when the midamble phase alignment of the phase place of multiple midamble and QPSK signal, the midamble of answering midamble and QPSK signal is transported to multiplier multiplies each other;
---the signal after will multiplying each other send narrow band filter to revert to collection of letters quadrature carrier;
---quadrature carrier is sent into adder, obtain the coherent carrier of collecting mail after the addition, be transported to collection of letters weighting circuit;
Collection of letters weighting circuit, contain phase shifter, described collection of letters weighting circuit is measured the output of wave beam formation of input termination and power-measuring circuit, in order to phase place by phase shifter adjustment collection of letters coherent carrier, until its send into that wave beam forms and power-measuring circuit in the homophase superposition obtain peak power output, determine weights;
Wave beam forms and power-measuring circuit, in order to measure adjustment signal to the output of collection of letters weighting circuit;
The weighting circuit of posting a letter, its weights input receives the corresponding output of letter weighting circuit, in order to the weights determined by collection of letters weighting circuit as weights;
Transmission antenna, input is through the output of the radio circuit sending and receiving letter weighting circuit of posting a letter, in order to the directional transmissions signal.
This shows, adopt the present invention can utilize low-power equipment to realize high-power posting a letter, significantly improve and send out power utilization, downlink capacity is risen, and need not communication base station equipment is carried out big transformation, can utilize 8PSK, modulation systems such as 16QAM significantly increase downlink user speed and systemic price ratio, and citation form and the purposes of the SA that stipulates in the reservation TD-SCDMA standard, and cost is lower, thereby, can make using and promoting practical of TD-SCDMA equipment for realizing that the desired space division multiple access system of TD-SCDMA standard lays the foundation.
Description of drawings
The present invention is further illustrated below in conjunction with accompanying drawing.
Coherent carrier extracts Fig. 1, the circuit block diagram of ripple Da Jiao test section in order to contain in the embodiment of the invention one collection of letters circuit.
Fig. 2 is for containing the circuit block diagram that downlink time division multiple access wave beam forms part in the embodiment of the invention one transmitting circuit.
Fig. 3 is for being the contrary modulation circuit theory diagram of the midamble of the embodiment of the invention one.
Fig. 4 is the weighting circuit theory diagram of posting a letter of the embodiment of the invention one.
Embodiment
Embodiment one
In the CDMA-TDMA intelligent antenna transceiving base station equipment of present embodiment, contain that coherent carrier recovers and the collection of letters circuit of ripple Da Jiao test section as shown in Figure 1, mainly comprise collection of letters antenna 1-1, radio circuit 1-2, midamble contrary modulation circuit 1-3, collection of letters weighting circuit 1-4, wave beam forms and power-measuring circuit 1-5, local midamble produce, multiple processing and phase adjusting module 1-6.Eight road outputs of antenna 1-1 connect eight road inputs of the contrary modulation circuit 1-3 of midamble by radio circuit 1-2.The two-way input of the contrary modulation circuit 1-3 of two-way output termination midamble of local midamble generation, multiple processing and phase adjusting module 1-6.Eight road outputs of the contrary modulation circuit 1-3 of midamble connect wave beam by collection of letters weighting circuit 1-4 and form and power-measuring circuit 1-5, and the output of this circuit receives the road feedback input end of letter weighting circuit 1-4.
Contain downlink time division multiple access wave beam and form transmitting circuit partly as shown in Figure 2, mainly constitute by baseband processing circuitry 2-1, serial to parallel conversion circuit 2-2, pulse amplitude modulation circuit 2-3, spectrum spreading circuit 2-4, multiple scrambler circuit 2-5, quadrature amplitude modulation circuit 2-6, the weighting circuit 2-7 that posts a letter, radio circuit 2-8 and transmission antenna circuit 2-9.Wherein the output of baseband processing circuitry 2-1 connects the input of pulse amplitude modulation circuit 2-2 through serial to parallel conversion circuit 2-2, the output of pulse amplitude modulation circuit 2-3 connects the input of multiple scrambler circuit 2-5 through spectrum spreading circuit 2-4, the output of multiple scrambler circuit 2-5 connects the input of weighting circuit 2-7 through quadrature amplitude modulation circuit 2-6, and the output of weighting circuit 2-7 is through the input of radio circuit 2-8 sending and receiving letter antenna 2-9.
The corresponding input of the weights output sending and receiving letter weighting circuit of above collection of letters weighting circuit, above equipment is finished the positioning transceiving of signal by following correlation step:
1) eight road midambles of the QPSK signal that collection of letters antenna is received are sent into the contrary modulation circuit of midamble;
2) the local midamble conversion of signals that local midamble generation module is generated becomes the multiple laggard horizontal phasing control of midamble;
3) when the midamble phase alignment of the phase place of multiple midamble and QPSK signal, deliver to the multiplier of midamble against modulation circuit;
4) signal after will multiplying each other send narrow band filter, reverts to two-way collection of letters quadrature carrier after the filtering;
5) the two-way quadrature carrier is sent into adder, obtain the coherent carrier of collecting mail after the addition, be transported to collection of letters weighting circuit;
5) control collection of letters weighting circuit by the output signal of wave beam formation and power-measuring circuit, by the phase place of phase shifter adjustment collection of letters coherent carrier corresponding in the collection of letters weighting circuit, until its send into that wave beam forms and power-measuring circuit in the homophase superposition obtain peak power output;
Determined phase shifter weights during 6) by Maximum Power Output, the DOA that determine to collect mail number;
Weights during 7) with above-mentioned Maximum Power Output transmit by antenna direction as the weights of the weighting circuit of posting a letter in the transmitting circuit.
The contrary modulation circuit of midamble among above Fig. 1 as shown in Figure 3.In the time need from the midamble sequence QPSK modulated signal of receiving, recovering collection of letters carrier wave, can utilize this contrary modulation circuit to realize.In " mid-" transmitting time of TD-SCDMA wireless burst that standard defines, midamble generation module among Fig. 3 receives synchronizing signal, control the time of sending of local midamble, after multiple processing, phase place adjustment, send and receive the local midamble I of the relevant two-way of QPSK center signal
Mid1And Q
Mid1, they and the I that receives in the QPSK signal
MidAnd Q
MidPhase alignment, make contrary modulation multiplier M
1And M
2Can finish relevant contrary modulation function, behind narrow-band filtering, recover cos w
cT and-sin w
cT two-way collection of letters quadrature carrier can be sent the coherent carrier that is used for base station collection of letters circuit and recover loop, uses as the reference carrier wave.Coherent carrier x obtains collecting mail after the two-way quadrature carrier addition that recovers
1, x
1Have the influence of wireless channel and antenna element 1 position.In like manner can obtain the collection of letters carrier wave x of other 7 antenna elements
2, x
3..., x
8
Collection of letters weighting circuit among Fig. 4 reflects at wave beam formation and power-measuring circuit 1-5 output signal W
cControl adjust down x
1, x
2..., x
8The time delay T of each road collection of letters coherent carrier
1, τ
2..., τ
8, be equivalent to adjust the phase place of each road carrier wave, make y
1, y
2..., y
8The phase alignment of each road carrier wave, wave beam formation and power-measuring circuit will record maximum power value this moment, be equivalent to the antenna pattern of collection of letters antenna is aimed at the travelling carriage orientation of living in of signaling.Write down the time delay value T of this moment
1, T
2..., T
8, be mapped as weighted value w
1, w
2..., w
8With w
1, w
2..., w
8Value deliver to downlink wave beam and form the weighting circuit 2-7 that posts a letter in the equipment component, then can make the antenna pattern of base station transmission antenna also aim at the residing orientation of travelling carriage, finish the directional transmissions function.
Because the base station equipment simplicity of present embodiment is easily gone, can realize space division multiple access, and utilize low-power amplifier to realize high-power transmission, especially can utilize the modulation system of high spectrum utilization such as 8PSK, 16QAM that the big power of posting a letter is converted into the availability of frequency spectrum, the cell capacity of TD-SCDMA standard can be doubled and redoubled.This external cause need not to send descending center signal, also can improve the frequency spectrum and the power utilization about 17% of posting a letter.
In a word, can prove because the TD-SCDMA standard uses the realization difficulty of smart antenna bigger, the present invention will propose a kind of feasible TDD-CDMA/TDMA improvement project on the basis of TD-SCDMA standard, utilize a carrier frequency high-speed data service to be provided for simultaneously a plurality of users, also can keep citation form and the purposes of the SA that stipulates in the TD-SCDMA standard simultaneously, thereby make domestic unique 3G standard can obtain great development with independent intellectual property right.
Claims (6)
1. a CDMA-TDMA intelligent antenna transceiving method is applied in the communication base station equipment that contains transceiver circuit, it is characterized in that finishing according to the following steps the positioning transceiving of signal:
1) midamble of the QPSK signal that collection of letters antenna is received is sent into the contrary modulation circuit of midamble, and the contrary modulation circuit of described midamble contains multiplier, narrow band filter and adder;
2) the local midamble conversion of signals that local midamble generation module is generated becomes the multiple laggard horizontal phasing control of midamble;
3) when the midamble phase alignment of the phase place of multiple midamble and QPSK signal, the midamble of multiple midamble and QPSK signal is delivered to midamble multiply each other against the multiplier of modulation circuit;
4) signal after will multiplying each other send narrow band filter, reverts to collection of letters quadrature carrier after the filtering;
5) quadrature carrier is sent into adder, obtain the coherent carrier of collecting mail after the addition, be transported to collection of letters weighting circuit;
6) control collection of letters weighting circuit by the output signal of wave beam formation and power-measuring circuit, by the phase place of phase shifter adjustment collection of letters coherent carrier corresponding in the collection of letters weighting circuit, until its send into that wave beam forms and power-measuring circuit in the homophase superposition obtain peak power output;
Determined phase shifter weights during 7) by Maximum Power Output, the DOA that determine to collect mail number;
Weights during 8) with above-mentioned Maximum Power Output transmit by antenna direction as the weights of the weighting circuit of posting a letter in the transmitting circuit.
2, according to the described CDMA-TDMA intelligent antenna transceiving method of claim 1, it is characterized in that: the mode that described collection of letters weighting circuit is adjusted each road collection of letters coherent carrier time delay with wave beam formation and power-measuring circuit output signal is adjusted phase place.
3, according to the described CDMA-TDMA intelligent antenna transceiving method of claim 2, it is characterized in that: the coherent carrier that described quadrature carrier outputs to base station collection of letters circuit recovers loop, as the reference carrier wave.
4, a kind of CDMA-TDMA intelligent antenna transceiving equipment comprises collection of letters circuit and transmitting circuit, it is characterized in that comprising:
Collection of letters antenna, its output connects the first input end of the contrary modulation circuit of midamble by collection of letters radio circuit, sends into the contrary modulation circuit of midamble in order to the midamble of the QPSK signal that will receive;
Local midamble produces, the multiple processing and phase adjusting module, and second input of the contrary modulation circuit of its output termination midamble in order to generating local corresponding midamble signal, and converts the laggard horizontal phasing control of multiple midamble to;
The contrary modulation circuit of midamble contains multiplier, narrow band filter and adder, in order to
---when the midamble phase alignment of the phase place of multiple midamble and QPSK signal, the midamble of answering midamble and QPSK signal is transported to multiplier multiplies each other;
---the signal after will multiplying each other send narrow band filter to revert to collection of letters quadrature carrier;
---quadrature carrier is sent into adder, obtain the coherent carrier of collecting mail after the addition, be transported to collection of letters weighting circuit;
Collection of letters weighting circuit, contain phase shifter, described collection of letters weighting circuit is measured the output of wave beam formation of input termination and power-measuring circuit, in order to phase place by phase shifter adjustment collection of letters coherent carrier, until its send into that wave beam forms and power-measuring circuit in the homophase superposition obtain peak power output, determine weights;
Wave beam forms and power-measuring circuit, in order to measure adjustment signal to the output of collection of letters weighting circuit;
The weighting circuit of posting a letter, its weights input receives the corresponding output of letter weighting circuit, in order to the weights determined by collection of letters weighting circuit as weights;
Transmission antenna, input is through the output of the radio circuit sending and receiving letter weighting circuit of posting a letter, in order to the directional transmissions signal.
5, according to the described CDMA-TDMA intelligent antenna transceiving equipment of claim 4, it is characterized in that: described collection of letters circuit comprises collection of letters antenna, radio circuit, the contrary modulation circuit of midamble, collection of letters weighting circuit, wave beam formation and power-measuring circuit, local midamble produce, the multiple processing and phase adjusting module; Eight road outputs of described collection of letters antenna connect eight road inputs of the contrary modulation circuit of midamble by radio circuit; Described local midamble produces, handles again and the two-way of phase adjusting module is exported the two-way input of termination midamble against modulation circuit; Eight road outputs of the contrary modulation circuit of described midamble connect wave beam by collection of letters weighting circuit and form and power-measuring circuit; Described wave beam forms and the output of power-measuring circuit receives the road feedback input end of believing weighting circuit.
6, according to the described CDMA-TDMA intelligent antenna transceiving equipment of claim 5, it is characterized in that: described transmitting circuit mainly is made of baseband processing circuitry, serial to parallel conversion circuit, pulse amplitude modulation circuit, spectrum spreading circuit, multiple scrambler circuit, quadrature amplitude modulation circuit, the weighting circuit of posting a letter, radio circuit and transmission antenna circuit; Wherein the output of baseband processing circuitry connects the input of pulse amplitude modulation circuit through the serial to parallel conversion circuit; The output of described pulse amplitude modulation circuit connects the input of multiple scrambler circuit through spectrum spreading circuit; The output of described multiple scrambler circuit connects the input of the described weighting circuit of posting a letter through the quadrature amplitude modulation circuit; The output of the described weighting circuit of posting a letter is through the input of radio circuit sending and receiving letter antenna.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2007100244824A CN100527895C (en) | 2007-06-19 | 2007-06-19 | CDMA-TDMA intelligent antenna transceiving method and device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2007100244824A CN100527895C (en) | 2007-06-19 | 2007-06-19 | CDMA-TDMA intelligent antenna transceiving method and device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101072392A CN101072392A (en) | 2007-11-14 |
| CN100527895C true CN100527895C (en) | 2009-08-12 |
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| Application Number | Title | Priority Date | Filing Date |
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| CNB2007100244824A Expired - Fee Related CN100527895C (en) | 2007-06-19 | 2007-06-19 | CDMA-TDMA intelligent antenna transceiving method and device |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101488794B (en) * | 2008-12-26 | 2012-07-04 | 南京邮电大学 | Intelligent antenna message transceiving method for CDMA high speed data base station |
| CN101707493B (en) * | 2009-08-26 | 2012-09-26 | 南京邮电大学 | Multipath signal carrier coherent demodulating Rake receiver |
| CN101807962B (en) * | 2010-03-16 | 2013-09-25 | 南京邮电大学 | Carrier phase shift detection DOA estimation device |
| CN107612586B (en) * | 2017-09-28 | 2020-04-03 | 中国工程物理研究院电子工程研究所 | Reconfigurable radio frequency spreading method based on programmable radio frequency phase shifter |
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| CN101072392A (en) | 2007-11-14 |
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Granted publication date: 20090812 Termination date: 20100619 |