CN102655429B - Co-channel user signal transmission method for auxiliary bidirectional relay wave division multiple access in GIS (Geographic Information System) and GPS (Global Positioning System) - Google Patents
Co-channel user signal transmission method for auxiliary bidirectional relay wave division multiple access in GIS (Geographic Information System) and GPS (Global Positioning System) Download PDFInfo
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Abstract
The invention discloses a co-channel user signal transmission method for auxiliary bidirectional relay wave division multiple access in a GIS (Geographic Information System) and a GPS (Global Positioning System), which relates to the technical field of wireless mobile communication. The method can be implemented by satisfying a condition A and a condition B, wherein the condition A is as follows: co-channel users are configured into different relay stations to maximize distances among co-channel users; the condition B is as follows: a primary transmission path is searched by GIS and GPS information; a main wave beam and a zero-point direction of a directional diagram are determined and serve as constraints to obtain an array weighted vector for receiving and sending a narrow wave beam; the main wave beams for receiving and sending the directional diagram all aims at the directions of respective primary paths; a zero point aims at the direction of the primary path of co-channel interference so as to carry out Gt*Gt-time enhancement on a useful signal; and the co-channel interference is inhibited by the zero point of the directional diagram. The relay wave division multiple access technology does not need to feed back channel information, data are increased only by a feedback mobile station GPS, and a mobile station terminal can be independently decoded. The co-channel user signal transmission method for the auxiliary bidirectional relay wave division multiple access in the GIS and the GPS has the advantages of wide cell coverage range and high system spectrum efficiency when being compared with the TPC (Transmit Power Control) technology, and the problem that the MIMO technology is limited by a small number of antennas when the MIMO (Multiple Input Multiple Output) technology is applied to a mobile station can be effectively solved.
Description
Technical field
The present invention relates to wireless mobile telecommunication technology field, particularly the auxiliary relaying wavelength division multiple access of a kind of GIS of relaying spatial reuse and GPS information is realized technology.
Background technology
Multiple-input and multiple-output (MIMO) technology can significantly improve the spectrum efficiency of wireless channel, but it is subject in mobile phone terminal application the restriction that antenna amount is few.Although virtual MIMO technology can be broken through this restriction, the cooperation encoding and decoding of Mobile Terminal realize difficulty.Adopt encode the in advance relaying space division multiple access technique of (TPC) algorithm of transmitting terminal can break through this restriction, it is the reception signal that each travelling carriage only relies on self, receive under the condition of signal the processing of also decoding independently cannot obtain other common road user.But TPC algorithm needs feedback channel information, this will increase the overhead of channel.In order to reduce feedback data amount, conventionally adopt the Limited Feedback technology of channel information.But by channel information Limited Feedback technology, transmitting terminal cannot obtain complete high accuracy channel information, this has limited the effect of relaying space division multiple access raising spectrum efficiency.
Summary of the invention
(1) technical problem that will solve
The technical problem to be solved in the present invention is: overcome from mechanism the deficiency that TPC algorithm needs feedback channel information, only depend on the incremental data of feedback mobile station GPS information, make the Mobile Terminal processing of can decoding independently, and obtain the spectrum efficiency higher than TPC algorithm.
(2) technical scheme
For solving the problems of the technologies described above, the auxiliary bi-directional relaying wavelength division multiple access Gong of a kind of GIS and GPS road subscriber signal transmission method is provided, divide space channel with positioning transceiving narrow beam, form the space channel that multi-beam is cut apart, realize the subscriber signal transmission of bi-directional relaying wavelength division multiple access Gong road, in implementation process, meet the following conditions:
A: utilize the travelling carriage global position system GPS information of feedback, Jiang Gong road user is configured to different relay stations, and maximize the distance between road user altogether;
B: utilize GIS-Geographic Information System GIS and the primary propagation path of GPS information search, determine main beam and the 0:00 direction of array aerial direction figure, obtain the array weight vector of transmitting-receiving narrow beam as constraint, make the main beam that transmits and receives directional diagram all aim at primary propagation path direction separately, aim at the primary propagation path direction that road disturbs altogether zero point.
Wherein, condition A specifically comprises:
The logical reach defining between the user in same relay station coverage is " 0 ", sets up and represents the logic matrix of road user's spacing relation altogether; Maximizing Minimum Distance between Yi Gong road user is decision objective, and logic matrix element is successively carried out to pulverised processing, draws K Zu Gong road user's best configuration result, and Ji Gong road user is configured to different relay stations, and the distance between Qie Gong road user increases.
Wherein, described condition B specifically comprises:
When base station is for k (k=1,2,, K) and group m (m=1,2, M) when altogether road user's downstream signal forms transmitting narrow beam, aim at the first section of direction of base station to the primary propagation path of m relay station with directional diagram main beam direction, and aim at base station to first section of direction of the primary propagation path of other relay station as constraints taking Pattern nulling direction, by array synthetic algorithm, obtain the weight vectors of base station to the array antenna transmitting narrow beam of m relay station;
As m (m=1, 2, M) relay station is for k (k=1, 2, K) group m (m=1, 2, M) road user's downstream signal forms while receiving narrow beam altogether, aim at the rear direction of base station to the primary propagation path of m relay station with directional diagram main beam direction, and aim at other relay station to the rear direction of the primary propagation path of m relay station as constraints taking Pattern nulling direction, by array synthetic algorithm, obtain m relay station and receive the weight vectors of the array antenna received narrow beam of road user's downstream signal altogether from base station m,
When m relay station is for k (k=1,2, K) group m (m=1,2 ... M) when road user's downstream signal forms transmitting narrow beam altogether, taking directional diagram main beam direction aim at m relay station to m altogether first section of direction of road user's primary propagation path as constraints, by array synthetic algorithm, obtain the weight vectors of the array antenna transmitting narrow beam of m relay station;
When m relay station is for k (k=1,2, K) group m (m=1,2 ... M) when user uplink capable signal formation in road receives narrow beam altogether, taking directional diagram main beam direction aim at m altogether road user to the rear direction of the primary propagation path of m relay station as constraints, by array synthetic algorithm, obtain the weight vectors of the array antenna received narrow beam of m relay station;
As m (m=1,2, M) relay station is for k (k=1,2, K) group m (m=1,2 ..., M) altogether when road user uplink signal formation transmitting narrow beam, aim at the first section direction of m relay station to the primary propagation path of base station with directional diagram main beam direction, and aim at m relay station to first section of direction of the primary propagation path of other relay station as constraints taking Pattern nulling direction, by array synthetic algorithm, obtain m relay station and launch the m weight vectors of the array antenna transmitting narrow beam of road user uplink signal altogether;
When base station is for k (k=1,2, K) group m (m=1,2, M) when road user uplink signal formation receives narrow beam altogether, aim at the rear direction of m relay station to the primary propagation path of base station with directional diagram main beam direction, and aim at other relay station to the rear direction of the primary propagation path of base station as constraints taking Pattern nulling direction, by array synthetic algorithm, obtain base station and receive the weight vectors of the array antenna received narrow beam of road user uplink signal altogether from m.
(3) beneficial effect
The present invention is different from the mechanism that space multiplexing technique is in the past divided space channel, and the auxiliary bi-directional relaying wavelength division multiple access technology of GIS and GPS is divided space channel with directional transmissions and directional reception narrow beam, forms the space channel that multi-beam is cut apart.The formation mechanism of this wavelength-division channel has ensured: useful signal can obtain G
t× G
renhancing doubly, Er Gong road disturbs and is suppressed by Pattern nulling.Wherein G
trepresent transmitting pattern gain, × expression multiplying, G
rrepresent receiving pattern gain.Therefore, the auxiliary bi-directional relaying wavelength division multiple access technology of GIS and GPS only depends on the incremental data of feedback mobile station GPS information, can realize the independent decoding of Mobile Terminal and process, and obtain the spectrum efficiency higher than TPC algorithm.
Brief description of the drawings
Fig. 1 is the auxiliary bi-directional relaying wavelength division multiple access system down link method for transmitting signals flow chart of GIS and GPS, establishes total K Zu Gong road user in a junction waves division multiple access system in figure, and every group has M Ge Gong road user, taking k group M Ge Gong road user as example;
Fig. 2 is the auxiliary bi-directional relaying wavelength division multiple access system up-link signal transmission method flow chart of GIS and GPS, establishes total K Zu Gong road user in a junction waves division multiple access system in figure, and every group has M Ge Gong road user, taking k group M Ge Gong road user as example.
Embodiment
Below in conjunction with accompanying drawing 1 and accompanying drawing 2, the embodiment of GIS and the auxiliary bi-directional relaying wavelength division multiple access Gong of GPS road subscriber signal transmission method is described in further detail.Following examples are used for illustrating the present invention, but are not used for limiting the scope of the invention.
Before signal transmission, utilize the mobile station GPS information of feedback, Jiang Gong road user is configured to different relay stations, and maximizes the distance between road user altogether, after configuration, makes the Maximizing Minimum Distance between common road user.Its embodiment: according to the GPS positional information of travelling carriage feedback, determine the user in each relay station coverage, user pond, selected junction waves division multiple access system Gong road; In order to ensure that the user in different relay station coverages can be configured to common road user, and user in same relay station coverage can not be configured to common road user, the logical reach defining between the user in same relay station coverage is " 0 ", sets up and represents the logic matrix of road user's spacing relation altogether; Maximizing Minimum Distance between Yi Gong road user is decision objective, and logic matrix element is successively carried out to pulverised processing, finally draws K Zu Gong road user's best configuration result.
Also need to determine according to GIS and GPS information the primary propagation path of multiple wireless link, primary propagation path refers to the most concentrated, the prominent propagation path of angle.Determine base station with primary propagation path, relay station array antenna is organized main beam and the 0:00 direction of transmit-receive position figure more, divide space channel with positioning transceiving narrow beam, form the space channel that multi-beam is cut apart, realize the subscriber signal transmission of bi-directional relaying wavelength division multiple access Gong road, when signal transmission, determine main beam and the 0:00 direction of array aerial direction figure with primary propagation path, obtain the array weight vector of transmitting-receiving narrow beam as constraint, make the main beam that transmits and receives directional diagram all aim at primary propagation path direction separately, aim at the primary propagation path direction that road disturbs altogether zero point.Specific as follows:
When base station is for k (k=1,2,, K) and group m (m=1,2, M) when altogether road user's downstream signal forms transmitting narrow beam, aim at the first section of direction of base station to the primary propagation path of m relay station with directional diagram main beam direction, and aim at base station to first section of direction of the primary propagation path of other relay station as constraints taking Pattern nulling direction, by array synthetic algorithm, obtain the weight vectors of base station to the array antenna transmitting narrow beam of m relay station;
As m (m=1, 2, M) relay station is for k (k=1, 2, K) group m (m=1, 2, M) road user's downstream signal forms while receiving narrow beam altogether, aim at the rear direction of base station to the primary propagation path of m relay station with directional diagram main beam direction, and aim at other relay station to the rear direction of the primary propagation path of m relay station as constraints taking Pattern nulling direction, by array synthetic algorithm, obtain m relay station and receive the weight vectors of the array antenna received narrow beam of road user's downstream signal altogether from base station m,
When m relay station is for k (k=1,2, K) group m (m=1,2 ... M) when road user's downstream signal forms transmitting narrow beam altogether, taking directional diagram main beam direction aim at m relay station to m altogether first section of direction of road user's primary propagation path as constraints, by array synthetic algorithm, obtain the weight vectors of the array antenna transmitting narrow beam of m relay station;
When m relay station is for k (k=1,2, K) group m (m=1,2 ... M) when user uplink capable signal formation in road receives narrow beam altogether, taking directional diagram main beam direction aim at m altogether road user to the rear direction of the primary propagation path of m relay station as constraints, by array synthetic algorithm, obtain the weight vectors of the array antenna received narrow beam of m relay station;
As m (m=1,2, M) relay station is for k (k=1,2, K) group m (m=1,2 ..., M) altogether when road user uplink signal formation transmitting narrow beam, aim at the first section direction of m relay station to the primary propagation path of base station with directional diagram main beam direction, and aim at m relay station to first section of direction of the primary propagation path of other relay station as constraints taking Pattern nulling direction, by array synthetic algorithm, obtain m relay station and launch the m weight vectors of the array antenna transmitting narrow beam of road user uplink signal altogether;
When base station is for k (k=1,2, K) group m (m=1,2, M) when road user uplink signal formation receives narrow beam altogether, aim at the rear direction of m relay station to the primary propagation path of base station with directional diagram main beam direction, and aim at other relay station to the rear direction of the primary propagation path of base station as constraints taking Pattern nulling direction, by array synthetic algorithm, obtain base station and receive the weight vectors of the array antenna received narrow beam of road user uplink signal altogether from m.
In the present embodiment, establish total K Zu Gong road user in a junction waves division multiple access system, every group has M Ge Gong road user.Taking k group M Ge Gong road user as example, the present embodiment provides GIS and the auxiliary bi-directional relaying wavelength division multiple access system down link method for transmitting signals flow chart of GPS, as shown in Figure 1, comprising:
Step S101, distributes M transmitting narrow beam of k group to take k physical channel.Described physical channel refer to rely on frequency division, time slot cut apart, transmission channel that address code is cut apart formation.
Step S102, base station for k organize m altogether road user be formed into the directional transmissions narrow beam of m relay station.If organize the common road user's of m base station array antenna weight vectors for k be
w
k，m＝[w
1，k，m，w
2，k，m，…，w
n，k，m，…，w
N，k，m]
T
Wherein subscript
trepresent the transposition computing of vector, N represents antenna for base station quantity, w
n, k, mrepresent to organize the m complex weighting coefficient of road user's n antenna altogether for k.For k organize m altogether road user a base station N antenna transmit for:
Wherein subscript
*represent conjugate operation, s
n, k, mrepresent that k organizes the signal of m Ge Gong road user before n antenna weighting.
Step S103, m relay station is organized m road user's downstream signal formation directional reception narrow beam altogether for k.If organize the common road user's of m relay station array antenna weight vectors for k be:
v
k，m＝[v
1，k，m，v
2，k，m，…，v
n，k，m，…，v
N，k，m]
T
Wherein v
n, k, mrepresent to organize the m complex weighting coefficient of road user's n antenna altogether for k.For k organize m altogether the composite signal of road user's a relay station N antenna receiving signal be:
Wherein subscript
hrepresent the conjugate transpose computing of vector, r
n, krepresent the reception signal of n antenna of corresponding k physical channel.
Step S104, m relay station is organized the common road user of m for k and is formed directional transmissions narrow beam.If organize the common road user's of m relay station array antenna weight vectors for k be
u
k，m＝[u
1，k，m，u
2，k，m，…，u
n，k，m，…，u
N，k，m]
T
Wherein u
n, k, mrepresent to organize the m complex weighting coefficient of road user's n antenna altogether for k.
For k organize m altogether road user a relay station N antenna transmit for:
Wherein y
n, k, mrepresent that k organizes the signal of m Ge Gong road user before n antenna weighting.
Taking k group M Ge Gong road user as example, the present embodiment provides GIS and the auxiliary bi-directional relaying wavelength division multiple access system up-link signal transmission method flow chart of GPS, as shown in Figure 2, comprising:
Step S201, m relay station is at the up one-tenth directional reception of k physical channel narrow beam.If organize the common road user's of m relay station array antenna weight vectors for k be
o
k，m＝[o
1，k，m，o
2，k，m，…，o
n，k，m，…，o
N，k，m]
T
Wherein o
n, k, mrepresent to organize the m complex weighting coefficient of road user's n antenna altogether for k.
For k organize m altogether the composite signal of road user's a relay station N antenna receiving signal be:
Wherein
represent the reception signal of n antenna of corresponding k physical channel.
Step S202, m relay station is at the up one-tenth directional transmissions of k physical channel narrow beam.If organize the common road user's of m relay station array antenna weight vectors for k be
p
k，m＝[p
1，k，m，p
2，k，m，…，p
n，k，m，…，p
N，k，m]
T
Wherein p
n, k, mrepresent to organize the m complex weighting coefficient of road user's n antenna altogether for k.
For k organize m altogether road user a relay station N antenna transmit for:
Wherein
represent that k organizes the signal of m Ge Gong road user before n antenna weighting.
Step S203, base station is organized the common road user uplink signal formation k of m for k and is organized m directional reception narrow beam.If organize the common road user's of m station, base station array antenna weight vectors for k be
q
k，m＝[q
1，k，m，q
2，k，m，…，q
n，k，m，…，q
N，k，m]
T
Wherein q
n, k, mrepresent to organize the m complex weighting coefficient of road user's n antenna altogether for k.
For k organize m altogether the composite signal of road user's a base station N antenna receiving signal be:
Wherein
represent the reception signal of n antenna of corresponding k physical channel.
The mechanism that the auxiliary bi-directional relaying wavelength division multiple access technology of the GIS of the present embodiment and GPS is divided space channel has following advantage:
The common Gong road user on the same group of relaying space multiplexing technique is in the past configured to same relay station, and near distance to each other, is unfavorable for suppressing common road and disturbs.The auxiliary bi-directional relaying wavelength division multiple access technology of GIS and GPS is according to the GPS positional information of travelling carriage, Jiang Gong road user's allocation problem is abstract is game theoretic decision problem, ensure that Liao Gong road user is configured to different relay stations, and maximize the distance between road user altogether, establish physical basis for suppressing the interference of common road, be conducive to further improve spectrum efficiency.
The TPC algorithm of relaying spatial reuse in the past needs feedback channel information.The auxiliary bi-directional relaying wavelength division multiple access technology of GIS and GPS is determined primary propagation path according to GIS database and GPS positional information, determines main beam and the 0:00 direction of base station, relay station array aerial direction figure with primary propagation path.Therefore, the auxiliary bi-directional relaying wavelength division multiple access technology of GIS and GPS, without feedback channel information, only needs to feed back the incremental data of mobile station GPS positional information, has reduced feedback data amount, has but retained the advantage that TPC algorithm travelling carriage is independently decoded.
MIMO technology is not in the past considered the impact of element antenna directivity mostly.Along with the raising of mobile communication rf frequency, element antenna also has directivity.The auxiliary bi-directional relaying wavelength division multiple access technology of GIS and GPS is considered the directivity of element antenna, and is used, and makes that the directional diagram main beam of array antenna is unique and width is narrower.
The auxiliary bi-directional relaying wavelength division multiple access technology of GIS and GPS has advantages of that cell coverage area is large, spectrum efficiency is higher compared with TPC technology, efficiently solve MIMO technology and be applied to travelling carriage and be subject to the restriction that antenna amount is few, there is application prospect in third generation mobile communication systems such as TD-LTE, LTE-Advanced, IMT-Advanced.
Above execution mode is only for illustrating the present invention; and be not limitation of the present invention; the those of ordinary skill in relevant technologies field; without departing from the spirit and scope of the present invention; can also make a variety of changes and modification; therefore all technical schemes that are equal to also belong to category of the present invention, and scope of patent protection of the present invention should be defined by the claims.
Claims (8)
1. the auxiliary bi-directional relaying wavelength division multiple access Gong of a GIS and GPS road subscriber signal transmission method, it is characterized in that, divide space channel with positioning transceiving narrow beam, form the space channel that multi-beam is cut apart, realize the subscriber signal transmission of bi-directional relaying wavelength division multiple access Gong road, in implementation process, meet the following conditions:
A: utilize the travelling carriage global position system GPS information of feedback, Jiang Gong road user is configured to different relay stations, and maximize the distance between road user altogether;
B: utilize GIS-Geographic Information System GIS and the primary propagation path of GPS information search, determine main beam and the 0:00 direction of array aerial direction figure, obtain the array weight vector of transmitting-receiving narrow beam as constraint, make the main beam that transmits and receives directional diagram all aim at primary propagation path direction separately, aim at the primary propagation path direction that road disturbs altogether zero point.
2. the auxiliary bi-directional relaying wavelength division multiple access Gong of GIS as claimed in claim 1 and GPS road subscriber signal transmission method, is characterized in that, condition A specifically comprises:
The logical reach defining between the user in same relay station coverage is " 0 ", sets up and represents the logic matrix of road user's spacing relation altogether; Maximizing Minimum Distance between Yi Gong road user is decision objective, and logic matrix element is successively carried out to pulverised processing, draws K Zu Gong road user's best configuration result, and Ji Gong road user is configured to different relay stations, the distance maximum between Qie Gong road user.
3. the auxiliary bi-directional relaying wavelength division multiple access Gong of GIS as claimed in claim 1 and GPS road subscriber signal transmission method, is characterized in that, described condition B specifically comprises:
When base station is for k(k=1,2, K) group m(m=1,2, M) when road user's downstream signal forms transmitting narrow beam altogether, aim at base station to first section of direction of the primary propagation path of m relay station with directional diagram main beam direction, and taking Pattern nulling direction aim at base station to first section of direction of the primary propagation path of other relay station as constraints, by array synthetic algorithm, obtain the weight vectors of base station to the array antenna transmitting narrow beam of m relay station, wherein, K Wei Gong road user's group number, M Wei Meizugong road user Zhong Gong road user's number.
4. the auxiliary bi-directional relaying wavelength division multiple access Gong of GIS as claimed in claim 1 and GPS road subscriber signal transmission method, is characterized in that, described condition B specifically comprises:
As m(m=1, 2, M) relay station is for k(k=1, 2, K) group m(m=1, 2, M) road user's downstream signal forms while receiving narrow beam altogether, aim at the rear direction of base station to the primary propagation path of m relay station with directional diagram main beam direction, and aim at other relay station to the rear direction of the primary propagation path of m relay station as constraints taking Pattern nulling direction, by array synthetic algorithm, obtain m relay station and receive the weight vectors of the array antenna received narrow beam of road user's downstream signal altogether from base station m, wherein, K Wei Gong road user's group number, M Wei Meizugong road user Zhong Gong road user's number.
5. the auxiliary bi-directional relaying wavelength division multiple access Gong of GIS as claimed in claim 1 and GPS road subscriber signal transmission method, is characterized in that, described condition B specifically comprises:
When m relay station is for k(k=1,2 ... K) group m(m=1,2 ..., M) when altogether road user's downstream signal forms transmitting narrow beam, taking directional diagram main beam direction aim at m relay station to m altogether first section of direction of road user's primary propagation path as constraints, by array synthetic algorithm, obtain the weight vectors of the array antenna transmitting narrow beam of m relay station, wherein, K Wei Gong road user's group number, M Wei Meizugong road user Zhong Gong road user's number.
6. the auxiliary bi-directional relaying wavelength division multiple access Gong of GIS as claimed in claim 1 and GPS road subscriber signal transmission method, is characterized in that, described condition B specifically comprises:
When m relay station is for k(k=1,2 ... K) group m(m=1,2 ..., M) when altogether user uplink capable signal formation in road receives narrow beam, taking directional diagram main beam direction aim at m altogether road user to the rear direction of the primary propagation path of m relay station as constraints, by array synthetic algorithm, obtain the weight vectors of the array antenna received narrow beam of m relay station, wherein, K Wei Gong road user's group number, M Wei Meizugong road user Zhong Gong road user's number.
7. the auxiliary bi-directional relaying wavelength division multiple access Gong of GIS as claimed in claim 1 and GPS road subscriber signal transmission method, is characterized in that, described condition B specifically comprises:
As m(m=1, 2, M) relay station is for k(k=1, 2, K) group m(m=1, 2, M) when road user uplink signal formation is launched narrow beam altogether, aim at the first section direction of m relay station to the primary propagation path of base station with directional diagram main beam direction, and aim at m relay station to first section of direction of the primary propagation path of other relay station as constraints taking Pattern nulling direction, by array synthetic algorithm, obtain m relay station and launch the m weight vectors of the array antenna transmitting narrow beam of road user uplink signal altogether, wherein, K Wei Gong road user's group number, M Wei Meizugong road user Zhong Gong road user's number.
8. the auxiliary bi-directional relaying wavelength division multiple access Gong of GIS as claimed in claim 1 and GPS road subscriber signal transmission method, is characterized in that, described condition B specifically comprises:
When base station is for k(k=1, 2, K) group m(m=1, 2, M) when road user uplink signal formation receives narrow beam altogether, aim at the rear direction of m relay station to the primary propagation path of base station with directional diagram main beam direction, and aim at other relay station to the rear direction of the primary propagation path of base station as constraints taking Pattern nulling direction, by array synthetic algorithm, obtain base station and receive the weight vectors of the array antenna received narrow beam of road user uplink signal altogether from m, wherein, K Wei Gong road user's group number, M Wei Meizugong road user Zhong Gong road user's number.
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