Summary of the invention
The objective of the invention is to disclose a kind of method that is used for multi-input multi-output system virtual space transmission environment, construction method is simple, can be used for mimo system is accurately tested and assessed, be a kind of method of very effective mimo system virtual space transmission.
Technical scheme of the present invention comprises:
A kind of method that is used for multi-input multi-output system virtual space transmission environment, it is by one group of merit subdivision, the virtual space transmission environment of one a group of adjustable damping phase shifted branch unit and a combination road cell formation multi-input multi-output system, each adjustable damping phase shifted branch unit is made of an adjustable damping unit and an adjustable phase-shifting unit;
Described each merit subdivision is provided with a signal input part and a plurality of signal output part, is used to obtain a plurality of copies of input signal;
In the described adjustable damping phase shifted branch unit, the output of its adjustable damping unit is connected to the input of adjustable phase-shifting unit; The input of adjustable damping unit is the input of adjustable damping phase shifted branch unit as a whole; The output of described adjustable phase-shifting unit is the output of adjustable damping phase shifted branch unit as a whole, signal is after input enters, through the decay of adjustable damping unit, and through adjustable phase-shifting unit phase shift, by the output output of adjustable damping phase shifted branch;
Described combiner unit is provided with a plurality of signal input parts and a signal output part, is used for stack and is merged into one road signal, exports by the combiner unit signal output part.
Described method, wherein, in the described adjustable damping phase shifted branch unit, the order interchangeable of described adjustable damping unit and adjustable phase-shifting unit.
Described method, wherein, described adjustable damping unit is that manual adjustments or electricity are regulated, to control its attenuation to input signal.
Described method, wherein, described adjustable phase-shifting unit is that manual adjustments or electricity are regulated, to control its phase shift size to input signal.
Adopt a kind of method that is used for the transmission of mimo system virtual space provided by the present invention, can make up mimo system space transportation simulator environment fast with less unit, construction method is simple, and unit therefor is easy to obtain; Adopt the inventive method simulation mimo system space transmission environment, can make up simulated environment very easily, mimo system is carried out static state or dynamic, qualitative or quantitative test analysis is saved a large amount of manpower and materials, has very high practicality.
Embodiment
Below will carry out comparatively detailed explanation to preferred embodiment of the present invention.
A kind of method that is used for multi-input multi-output system virtual space transmission environment of the present invention is by one group of merit subdivision, the virtual space transmission environment of one a group of adjustable damping phase shifted branch unit and a combination road cell formation mimo system.One of them adjustable damping phase shifted branch unit is made of an adjustable damping unit and an adjustable phase-shifting unit; The adjustable damping unit can be, but is not limited only to manual adjustments or electricity is regulated, to control its attenuation to input signal; Adjustable phase-shifting unit can be, but is not limited only to manual adjustments or electricity is regulated, to control its phase shift size to input signal.
For M * N mimo system, the mimo system of M output, a N input is promptly arranged, the inventive method is by M merit subdivision, and M * N adjustable damping phase shifted branch unit and N combiner unit make up.Wherein each adjustable damping phase shifted branch unit is made of an adjustable damping unit and an adjustable phase-shifting unit.
M merit subdivision be designated as respectively merit subdivision 1, merit subdivision 2 ..., merit subdivision M, for merit subdivision k (k=1,2, ..., M), it has a signal input part and N signal output part, be designated as respectively the 1st signal output part, the merit subdivision k of signal input part, the merit subdivision k of merit subdivision k the 2nd signal output part ..., N the signal output part of merit subdivision k.Signal by N the signal output part output of merit subdivision k, promptly obtains N copy of input signal after the signal input part input of merit subdivision k.
M * N adjustable damping phase shifted branch unit be designated as respectively adjustable damping phase shifted branch unit 1, adjustable damping phase shifted branch unit 2 ..., adjustable damping phase shifted branch unit M * N.For adjustable damping phase shifted branch unit j (j=1,2 ..., M * N), it is made of an adjustable damping unit and an adjustable phase-shifting unit, wherein the output of adjustable damping unit is connected to the input of adjustable phase-shifting unit; The input of adjustable damping unit is the input of adjustable damping phase shifted branch unit as a whole, is designated as the input of adjustable damping phase shifted branch j; The output of adjustable phase-shifting unit is the output of adjustable damping phase shifted branch unit as a whole, is designated as the output of adjustable damping phase shifted branch j.
Signal at first passes through the decay of adjustable damping unit after the input of adjustable damping phase shifted branch j enters, pass through adjustable phase-shifting unit phase shift then, exports by the output of adjustable damping phase shifted branch j at last.It should be noted; it more than is the more excellent solution of the inventive method; if but the order of transposing adjustable damping unit and adjustable phase-shifting unit; it is the input that the output of adjustable phase-shifting unit is connected to the adjustable damping unit; the input of adjustable phase-shifting unit is the input of adjustable damping phase shifted branch unit as a whole; the output of adjustable damping unit is the output of adjustable damping phase shifted branch unit as a whole; then still can be used for mimo system space transportation simulator, therefore also should belong in protection scope of the present invention.
N combiner unit be designated as respectively combiner unit 1, combiner unit 2 ..., combiner unit N.For combiner unit i (i=1,2, ..., N), it has N signal input part and a signal output part, be designated as respectively the 1st signal input part, the combiner unit i of combiner unit i the 2nd signal input part ..., N the signal input part of combiner unit i, the signal output part of combiner unit i.The N road is after independently N the signal input part of signal ECDC road unit i imported simultaneously, and stack is merged into one road signal, by the signal output part output of combiner unit i, promptly obtains the superposed signal of N independent input signal.
For carrying out M * N mimo system space transportation simulator, the inventive method is connected with N combiner unit M merit subdivision, M * N adjustable damping phase shifted branch unit by a graded, the common M * N mimo system space transmission channel that makes up simulation.
The method of attachment of the inventive method is, with the 2nd signal output part of the 1st signal output part of merit subdivision 1, merit subdivision 1 ..., N signal output part of merit subdivision 1 connect successively the input of the input of adjustable damping phase shifted branch 1, adjustable damping phase shifted branch 2 ..., the input of adjustable damping phase shifted branch N; With the 2nd signal output part of the 1st signal output part of merit subdivision 2, merit subdivision 2 ..., N signal output part of merit subdivision 2 connect successively the input of the input of adjustable damping phase shifted branch (N+1), adjustable damping phase shifted branch (N+2) ..., the input of adjustable damping phase shifted branch (2N); The rest may be inferred, until with the 2nd signal output part of the 1st signal output part of merit subdivision M, merit subdivision M ..., N the signal output part of merit subdivision M connect successively the adjustable damping phase shifted branch (input of (M-1) * N+1), adjustable damping phase shifted branch (input of (M-1) * N+2) ..., the adjustable damping phase shifted branch (input of M * N).With the 3rd signal input part of the 2nd signal input part of the 1st signal input part of combiner unit 1, combiner unit 1, combiner unit 1 ..., M signal input part of combiner unit 1 connect successively the output of the output of the output of adjustable damping phase shifted branch 1, adjustable damping phase shifted branch (N+1), adjustable damping phase shifted branch (2N+1) ..., the adjustable damping phase shifted branch (output of (M-1) * N+1); With the 3rd signal input part of the 2nd signal input part of the 1st signal input part of combiner unit 2, combiner unit 2, combiner unit 2 ..., M signal input part of combiner unit 2 connect successively the output of the output of the output of adjustable damping phase shifted branch 2, adjustable damping phase shifted branch (N+2), adjustable damping phase shifted branch (2N+2) ..., the adjustable damping phase shifted branch (output of (M-1) * N+2); The rest may be inferred, until with the 3rd signal input part of the 2nd signal input part of the 1st signal input part of combiner unit N, combiner unit N, combiner unit N ..., M the signal input part of combiner unit N connect successively the output of the output of the output of adjustable damping phase shifted branch N, adjustable damping phase shifted branch 2N, adjustable damping phase shifted branch 3N ..., the adjustable damping phase shifted branch (output of M * N).
Through above-mentioned connection, the inventive method has promptly made up the Channel Transmission network of a simulation mimo system, and it has M signal input part, i.e. the input of M merit subdivision can be simulated the individual starting point that transmits of M of M * NMIMO system; Have N signal output part, i.e. the output of N combiner unit can be simulated the acceptance point of N receiving terminal of M * N mimo system; And an adjustable damping phase shifted branch unit is arranged all between the input of the output of any one merit subdivision and any one combiner unit, can simulate a transmission path of M * N mimo system, wherein the attenuation of this transmission path to input signal can be simulated in the adjustable damping unit that comprises in the adjustable damping phase shifted branch unit, and adjustable phase-shifting unit can be simulated the phase shift size of this transmission path to input signal.
Following will being described in more detail preferred embodiment of the present invention below realizes that to the inventive method the process of the virtual space transmission environment of 2 * 4 mimo systems describes.
The inventive method is by one group of merit subdivision, and one a group of adjustable damping phase shifted branch unit and a combination road cell formation go out the virtual space transmission environment of 2 * 4 mimo systems.One of them adjustable damping phase shifted branch unit is made of an adjustable damping unit and an adjustable phase-shifting unit; The adjustable damping unit is electric regulative mode, promptly can control its attenuation to input signal by the input voltage of control end; Adjustable phase-shifting unit is electric regulative mode, promptly can control its phase shift size to input signal by the input voltage of control end.
For 2 * 4 mimo systems, the mimo system of 2 outputs, 4 inputs is promptly arranged, preferred embodiment of the present invention is by 2 merit subdivisions, and 2 * 4 (=8) individual adjustable damping phase shifted branch unit and 4 combiner units make up.Wherein each adjustable damping phase shifted branch unit is made of an adjustable damping unit and an adjustable phase-shifting unit.
2 merit subdivisions are designated as merit subdivision 1 and merit subdivision 2 respectively, for merit subdivision k (k=1,2), it has a signal input part and 4 signal output parts, is designated as the 3rd signal output part of the 2nd signal output part, merit subdivision k of the 1st signal output part, the merit subdivision k of signal input part, the merit subdivision k of merit subdivision k and the 4th signal output part of merit subdivision k respectively.Signal by 4 signal output part outputs of merit subdivision k, promptly obtains 4 copies of input signal after the signal input part input of merit subdivision k.
8 adjustable damping phase shifted branch unit be designated as respectively adjustable damping phase shifted branch unit 1, adjustable damping phase shifted branch unit 2 ..., adjustable damping phase shifted branch unit 8.For adjustable damping phase shifted branch unit j (j=1,2 ..., 8), it is made of an adjustable damping unit and an adjustable phase-shifting unit, wherein the output of adjustable damping unit is connected to the input of adjustable phase-shifting unit; The input of adjustable damping unit is the input of adjustable damping phase shifted branch unit as a whole, is designated as the input of adjustable damping phase shifted branch k; The output of adjustable phase-shifting unit is the output of adjustable damping phase shifted branch unit as a whole, is designated as the output of adjustable damping phase shifted branch k.Signal at first passes through the decay of adjustable damping unit after the input of adjustable damping phase shifted branch k enters, pass through adjustable phase-shifting unit phase shift then, exports by the output of adjustable damping phase shifted branch k at last.
4 combiner units are designated as combiner unit 1, combiner unit 2, combiner unit 3 and combiner unit 4 respectively.For combiner unit i (i=1,2,3,4), it has 4 signal input parts and a signal output part, is designated as the 4th signal input part of the 3rd signal input part, combiner unit i of the 2nd signal input part, the combiner unit i of the 1st signal input part, the combiner unit i of combiner unit i and the signal output part of combiner unit i respectively.4 the tunnel after independently 4 signal input parts of signal ECDC road unit i are imported simultaneously, and stack is merged into one road signal, by the signal output part output of combiner unit i, promptly obtain the superposed signal of 4 independent input signals.
For carrying out 2 * 4 mimo system space transportation simulators, the preferred embodiment of the inventive method is with 2 merit subdivisions, 8 adjustable damping phase shifted branch unit are connected by the following stated order with 4 combiner units, the common 2 * 4MIMO system space transmission channel that makes up simulation: with the 1st signal output part of merit subdivision 1, the 2nd signal output part of merit subdivision 1, the 3rd signal output part of merit subdivision 1, the 4th signal output part of merit subdivision 1 connects the input of adjustable damping phase shifted branch 1 successively, the input of adjustable damping phase shifted branch 2, the input of adjustable damping phase shifted branch 3, the input of adjustable damping phase shifted branch 4; The 1st signal output part of merit subdivision 2, the 2nd signal output part of merit subdivision 2, the 3rd signal output part of merit subdivision 2, the 4th signal output part of merit subdivision 2 are connected the input of the input of adjustable damping phase shifted branch 5, adjustable damping phase shifted branch 6, the input of adjustable damping phase shifted branch 7, the input of adjustable damping phase shifted branch 8 successively.
The 1st signal input part of combiner unit 1, the 2nd signal input part of combiner unit 1 are connected the output of adjustable damping phase shifted branch 1, the output of adjustable damping phase shifted branch 5 successively; The 1st signal input part of combiner unit 2, the 2nd signal input part of combiner unit 2 are connected the output of adjustable damping phase shifted branch 2, the output of adjustable damping phase shifted branch 6 successively; The 1st signal input part of combiner unit 3, the 2nd signal input part of combiner unit 3 are connected the output of adjustable damping phase shifted branch 3, the output of adjustable damping phase shifted branch 7 successively; The 1st signal input part of combiner unit 4, the 2nd signal input part of combiner unit 4 are connected the output of adjustable damping phase shifted branch 4, the output of adjustable damping phase shifted branch 8 successively.
Through above-mentioned connection, the inventive method has promptly made up the Channel Transmission network of simulation 2 * 4MIMO system, and it has 2 signal input parts, i.e. the input of 2 merit subdivisions can be simulated 2 starting points that transmit of 2 * 4MIMO system; Have 4 signal output parts, i.e. the output of 4 combiner units can be simulated the acceptance point of 4 receiving terminals of 2 * 4MIMO system; And an adjustable damping phase shifted branch unit is arranged all between the input of the output of any one merit subdivision and any one combiner unit, can simulate a transmission path of 2 * 4MIMO system, wherein the attenuation of this transmission path to input signal can be simulated in the adjustable damping unit that comprises in the adjustable damping phase shifted branch unit, and adjustable phase-shifting unit can be simulated the phase shift size of this transmission path to input signal.
2 * 4MIMO system simulation the transmission environment that makes up by the inventive method preferred embodiment, with its 2 signal input parts, i.e. the input of 2 merit subdivisions is connected respectively to independently signal source of 2 signal emission ports of 2 * 4MIMO system transmitter or 2; With its 4 signal output parts, i.e. the output of 4 combiner units is connected respectively to 4 receiver ports of 2 * 4MIMO system receiver; Connect necessary auxiliary signal on this basis, as triggering signal etc., can constitute complete 2 * 4MIMO network analysis test environment, the inventive method preferred embodiment has then been simulated 2 * 4MIMO system transmitter to the space transmission environment between the receiver.
The method that is used for the transmission of mimo system virtual space provided by the present invention has following outstanding advantage:
Can make up mimo system space transportation simulator environment with the inventive method fast with less unit, construction method is simple, and unit therefor is easy to obtain;
The inventive method expands with the mimo system space transportation simulator environment that the makes up scale that is easy to carry out, promptly after the number of transmit antennas M of M * NMIMO system or reception antenna are counted N and changed, only need to be configured to new M * NMIMO system space transportation simulator environment according to the change that the annexation of the inventive method regulation is done seldom;
By regulating the adjustable damping phase-shifting unit, the transmission factor (comprising attenuation and phase shift size) of each transmission path of simulation all can be controlled, and can know, then the mimo system space transmission environment of whole simulation, be that the mimo system transmission matrix can be provided with arbitrarily, system transmission matrix can accurately be known, therefore can do quantitative, static test to mimo system under the space transmission environment that knows by the inventive method, or static function, performance evaluation;
By regulating the adjustable damping phase-shifting unit by predefined rule, the change procedure of the transmission factor (comprising attenuation and phase shift size) of each transmission path of simulation, then can know the Changing Pattern of the transmission factor of each transmission path, then the mimo system space transmission environment of whole simulation, be that the mimo system transmission matrix can change by predefined rule, the Changing Pattern of system transmission matrix can accurately be known, therefore can do statistics to mimo system knowing under the space transmission environment of Changing Pattern by the inventive method, dynamic test, or dynamic function, performance evaluation.
In a word, because frontier nature, the complexity of MIMO technology, the method that does not also have at present the transmission of disclosed quantitative simulation mimo system space, all be under the wireless environment of channel simulator or reality, to carry out the statistical analysis test mostly, and therefore restive these mimo system space transmission environments of user are difficult to obtain mimo system performance test accurately, analysis result by channel simulator or actual wireless environment.And adopt the inventive method simulation mimo system space transmission environment, and can make up simulated environment very easily, mimo system is carried out static state or dynamic, qualitative or quantitative test analysis is saved a large amount of manpower and materials, has very high practicality.
Should be understood that protection range of the present invention is illustrated in the appended claims, and can not be with the foregoing description of specification as restriction, every conspicuous modification within aim of the present invention is also due within protection scope of the present invention.