CN105871483A - Wireless channel measurement system, transmitter and receiver - Google Patents
Wireless channel measurement system, transmitter and receiver Download PDFInfo
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- CN105871483A CN105871483A CN201510031187.6A CN201510031187A CN105871483A CN 105871483 A CN105871483 A CN 105871483A CN 201510031187 A CN201510031187 A CN 201510031187A CN 105871483 A CN105871483 A CN 105871483A
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Abstract
The invention discloses a wireless channel measurement system, a transmitter and a receiver, which relate to the technical field of communication and aim at solving the problem of difficult measurement by a multi-antenna channel in the prior art. The wireless channel measurement system comprises the transmitter and a receiver, wherein the transmitter is used for generating multiple paths of orthogonal spread spectrum signals and transmitting the multiple paths of orthogonal spread spectrum signals to the receiver via the wireless channel respectively; and the receiver is used for receiving the multiple paths of orthogonal spread spectrum signals from the transmitter via the wireless channel and acquiring measurement parameters of the wireless channel according to the acquired multiple paths of orthogonal spread spectrum signals.
Description
Technical field
The present invention relates to communication technical field, particularly relate to a kind of wireless channel measurement system, transmitter and
Receiver.
Background technology
Accurately grasp the propagation characteristic of broadband multi-antenna wireless channel, for one nothing adapted therewith of design
Line communication system is particularly important, and measuring wireless channel is to understand its propagation characteristic the most directly and to have
The approach of effect.In the evolution of third and fourth generation communication system, progressively establish with time division multiplex
(TDM) mode is that the main flow wireless channel parameter measurement system of feature, i.e. sending and receiving end aerial array are total to respectively
Use a set of radio frequency unit, utilize high speed COMS bus exchange switch successively sending and receiving end to be measured antenna to be connected to respective radio frequency
On unit, any time only has the channel between a pair sending and receiving end antenna to be in measured state.In three, four generations
In wireless communication system, this measurement system adapts therewith, and helps fully in actual application
Help others understood the characteristic of channel.
But being as the rise of 5G wireless communication system, increasing new technique and application scenarios are the most true
Surely can be introduced in Next-Generation Wireless Communication Systems, such as: utilize higher frequency range be transmitted (5G-60G),
More antenna (128 antennas are the most), system is used to use bigger bandwidth (certainly in base station side
300-500MHz to 1500MHz), at a high speed (500+Km/h) and V2V (between vehicle and vehicle) scene
Under carry out communication etc., these new techniques, the various combination of new scene are likely to result at present with TDM side
The wireless channel parameter measurement thrashing of formula work, such as: along with mobile terminal speed and the increase of operating frequency,
Measurement system cannot complete Massive MIMO (extensive multiple antennas) within shorter coherence time to be owned
Channel measurement between antenna pair, thus cause measuring unsuccessfully.
Summary of the invention
The technical problem to be solved in the present invention is to provide a kind of wireless channel measurement system, transmitter and reception
Machine, in order to solve the problem that in prior art, multi-antenna channel measures difficulty.
On the one hand, the present invention provides a kind of wireless channel measurement system, including transmitter, is used for generating many
Described multichannel orthogonal spectrum expansion signal is also sent to receiver by road orthogonal spectrum expansion signal respectively by wireless channel；
Receiver, for receiving the multichannel orthogonal spectrum expansion signal from described transmitter by described wireless channel, and
Measurement parameter according to wireless channel described in the described multichannel orthogonal spectrum expansion signal acquisition received.
Optionally, described transmitter for passing through corresponding antenna warp respectively by described multichannel orthogonal spectrum expansion signal
Sent to receiver by wireless channel simultaneously.
Optionally, described measurement parameter include following at least one: multidiameter delay, Doppler frequency shift, signal
Amplitude, signal arrive angle, signal leave angle.
Optionally, described transmitter includes: signal generation, is used for generating multichannel orthogonal spectrum expansion signal；Letter
Number conditioning and emission part, carry out signal tune for the multichannel orthogonal spectrum expansion signal that generated by described signal generation
Reason, and the described multichannel orthogonal spectrum expansion signal after conditioning is sent to described receiver via wireless channel.
Optionally, described receiver includes: signal receives and conditioning portion, many for being received by wireless channel
Road orthogonal spectrum expansion signal, and the described multichannel orthogonal spectrum expansion signal received is carried out signal condition；At data
Reason portion, for the multichannel orthogonal spectrum expansion signal after signal reception and the conditioning of conditioning portion is carried out data process, with
Obtain the measurement parameter of described wireless channel.
On the other hand, the present invention provides a kind of transmitter, including: signal generation, it is used for just generating multichannel
Hand over spread-spectrum signal；Signal condition and emission part, for the multichannel orthogonal spectrum expansion generated by described signal generation
Signal carries out signal condition, and by the described multichannel orthogonal spectrum expansion signal after conditioning via wireless channel to reception
Machine sends.
Optionally, described signal condition and emission part include: means of upconversion, with described signal generation phase
Even, it is used for described multichannel orthogonal spectrum expansion signal up-conversion to carrier frequency；Power amplifier device, with described
Means of upconversion is connected, for the signal after up-conversion is carried out power amplification；Launch filter, with institute
State power amplifier device to be connected, for the signal after power amplification is filtered；Launch antenna, with described
Transmitting filter is connected, for filtered signal is sent to wireless channel.
On the other hand, the present invention provides a kind of receiver, including: signal receives and conditioning portion, is used for passing through
Wireless channel receives multichannel orthogonal spectrum expansion signal, and the described multichannel orthogonal spectrum expansion signal received is carried out letter
Number conditioning；Data processing division, is carried out for docking the multichannel orthogonal spectrum expansion signal after receiving the conditioning of signal condition portion
Data process, to obtain the measurement parameter of described wireless channel.
Optionally, described signal receives and conditioning portion includes: reception antenna, for being received by wireless channel
Multichannel orthogonal spectrum expansion signal；Accept filter device, is connected with described reception antenna, for the institute received
State multichannel orthogonal spectrum expansion signal to be filtered；Down-conversion device, is connected with the described device that accepts filter, is used for
Filtered described multichannel orthogonal spectrum expansion signal is downconverted to baseband frequency.
Optionally, described data processing division, specifically for: to the described multichannel orthogonal spectrum expansion after signal condition
Signal carries out despreading operations to obtain the impulse response function of described wireless channel；To described impulse response function
Carry out parameter estimation, to obtain the measurement parameter of described wireless channel.
The wireless channel measurement system of embodiment of the present invention offer, transmitter and receiver, wherein, transmitter
Can generate multichannel orthogonal spectrum expansion signal and by described multichannel orthogonal spectrum expansion signal respectively by wireless channel to
Receiver sends；Receiver can be believed by the multichannel orthogonal spectrum expansion that described wireless channel receives from transmitter
Number, and according to the measurement parameter of wireless channel described in the described multichannel orthogonal spectrum expansion signal acquisition received.This
Sample, owing to using multichannel orthogonal spectrum expansion signal to communicate, namely with code division between transmitter and receiver
Multiplex mode completes the channel measurement in multiaerial system between all antennas pair within the same time period, it is to avoid
In finite time, carry out antenna switching frequently, thus significantly improve in mobile terminal speed and operating frequency
Time, remain able to be accurately measured the various parameters of wireless channel.
Accompanying drawing explanation
Fig. 1 is a kind of structural representation of the wireless channel measurement system that the embodiment of the present invention provides；
Fig. 2 is a kind of structural representation of transmitter in the preferred embodiment of the present invention；
Fig. 3 is a kind of structural representation of receiver in the preferred embodiment of the present invention；
Fig. 4 is signal condition and a kind of structural representation of emission part in the preferred embodiment of the present invention；
Fig. 5 is that in the preferred embodiment of the present invention, signal receives and a kind of structural representation in conditioning portion；
Fig. 6 is a kind of detailed construction schematic diagram of the wireless channel measurement system that the embodiment of the present invention provides；
Fig. 7 is that a kind of of wireless channel measurement system that the embodiment of the present invention provides measures time diagram.
Detailed description of the invention
Below in conjunction with accompanying drawing, the present invention is described in detail.Should be appreciated that described herein being embodied as
Example, only in order to explain the present invention, does not limit the present invention.
As it is shown in figure 1, embodiments of the invention provide a kind of wireless channel measurement system, including:
Transmitter 1, is used for generating multichannel orthogonal spectrum expansion signal and being led to respectively by described multichannel orthogonal spectrum expansion signal
Cross wireless channel to send to receiver 2；
Receiver 2, for receiving the multichannel orthogonal spectrum expansion signal from transmitter 1 by described wireless channel,
And according to the measurement parameter of wireless channel described in the described multichannel orthogonal spectrum expansion signal acquisition received.
The wireless channel measurement system that the embodiment of the present invention provides includes transmitter 1 and receiver 2, wherein,
Transmitter 1 can generate multichannel orthogonal spectrum expansion signal and by described multichannel orthogonal spectrum expansion signal respectively by wireless
Channel sends to receiver 2；Receiver 2 can be received from transmitter more than 1 by described wireless channel
Road orthogonal spectrum expansion signal, and according to wireless channel described in the described multichannel orthogonal spectrum expansion signal acquisition received
Measure parameter.So, owing to using multichannel orthogonal spectrum expansion signal to lead between transmitter 1 and receiver 2
Letter, namely completes in multiaerial system between all antennas pair in code division multiplexing mode within the same time period
Channel measurement, it is to avoid carry out antenna switching frequently in finite time such that it is able in mobile terminal speed
When significantly improving with operating frequency, remain able to be accurately measured the various parameters of wireless channel.
Concrete, transmitter 1 can be provided with multichannel and launch antenna, it is equal that each of which root launches antenna
A corresponding independent radio-frequency channel；Separate multichannel orthogonal spectrum expansion signal can be led to by transmitter 1 respectively
The antenna crossing correspondence sends to receiver 2 via wireless channel simultaneously.In order to introduce intersymbol string as few as possible
Disturbing, transmitter 1 preferentially selects auto-correlation and the best orthogonal spreading sequence of cross-correlation performance.These signals
It is sent to receiver 2, by the signal received being analyzed i.e. in receiver 2 side by wireless channel
The measurement of correlation parameter of wireless channel can be obtained.Optionally, these measurement parameters can include following at least one
Kind: multidiameter delay, Doppler frequency shift, signal amplitude, signal arrive angle, signal leave angle.Obtaining
After these channel parameters, i.e. can be appreciated that the propagation characteristic of broadband multi-antenna wireless channel, thus design with
The wireless communication system adapted.
Specifically, as in figure 2 it is shown, in wireless channel measurement system, transmitter 1 comprises the steps that signal
Generating unit 11, signal condition and emission part 12；Wherein, signal generation 11 is used for generating the orthogonal expansion of multichannel
Frequently signal；Signal condition and emission part 12 are for the multichannel orthogonal spectrum expansion signal generated by signal generation 11
Carry out signal condition, and the multichannel orthogonal spectrum expansion signal after conditioning is sent to receiver 2 via wireless channel.
Specifically, as it is shown on figure 3, receiver 2 comprises the steps that signal receives and at conditioning portion 21, data
Reason portion 22, wherein, signal receives and conditioning portion 21 can be used for receiving multichannel orthogonal spectrum expansion by wireless channel
Signal, and the described multichannel orthogonal spectrum expansion signal received is carried out signal condition；Data processing division 22 can
For the multichannel orthogonal spectrum expansion signal after signal reception and conditioning portion 21 conditioning is carried out data process, to obtain
Obtain the measurement parameter of described wireless channel.
For the letter enabling this wireless channel measurement system accurately measuring terminals to use in moving process
The relevant parameter in road, can be respectively provided with positioner on transmitter 1 and receiver 2.This positioner
On the one hand can record the position of transmitter and receiver, time, place and channel data coupling is got up,
For back-end analysis and the channel characteristics concluded under different scenes, on the other hand the most recordable transmitter and receiver
Translational speed, the relevant informations such as distance between transmitter and receiver are provided, in order to indirect Estimation goes out
The parameter such as maximum Doppler frequency shift, maximum multipath time delay, provides setting time delay isoparametric for whole experiments of measuring
Foundation.
When testing, first the work frequency of transmitter 1 and receiver 2 according to test request, can be set
Section, bandwidth of operation, antenna number and the parameter such as spacing, work schedule, provide in combination with locating module
Auxiliary information, receives go-and-retum distance etc. as sent out, and configures the parameters such as transmitting power.
Further, for making measurement accurate, send out, receive the clock letter needing have accurately, synchronize in two ends
Number.Optionally, this clock signal can be provided by rubidium clock.In some embodiments of the invention, if positioned
Module use satellite fix mode, such as: the Big Dipper, GPS etc., then can also use satellite time transfer come for
System provides clock signal.
Accordingly, as in figure 2 it is shown, embodiments of the invention also provide for a kind of transmitter 1, including:
Signal generation 11, is used for generating multichannel orthogonal spectrum expansion signal；
Signal condition and emission part 12, enter for the multichannel orthogonal spectrum expansion signal generated by described signal generation
Row signal condition, and the described multichannel orthogonal spectrum expansion signal after conditioning is sent out to receiver via wireless channel
Send.
The transmitter 1 that the embodiment of the present invention provides can generate multichannel orthogonal spectrum expansion signal by described multichannel just
Spread-spectrum signal is handed over to be sent to receiver by wireless channel respectively, so that receiver is according to this multichannel orthogonal spectrum expansion
The measurement parameter of signal acquisition wireless channel.So, owing to just using multichannel between transmitter 1 and receiver
Friendship spread-spectrum signal communicates, and namely completes multiaerial system in code division multiplexing mode within the same time period
In channel measurement between all antennas pair, it is to avoid in finite time, carry out antenna switching frequently, thus
Can remain able to be accurately measured each of wireless channel when mobile terminal speed and operating frequency significantly improve
Plant parameter.
Optionally, as shown in Figure 4, signal condition and emission part 12 comprise the steps that
Means of upconversion 121, is connected with signal generation 11, for by described multichannel orthogonal spectrum expansion signal
It is converted to carrier frequency；
Power amplifier device 122, is connected with means of upconversion 121, for being carried out by the signal after up-conversion
Power amplification；
Launch filter 123, be connected with power amplifier device 122, for the signal after power amplification
It is filtered；
Launch antenna 124, be connected with launching filter 123, for filtered signal is sent to nothing
Line channel.
Accordingly, as it is shown on figure 3, embodiments of the invention also provide for a kind of receiver 2, including:
Signal receives and conditioning portion 21, for receiving multichannel orthogonal spectrum expansion signal by wireless channel, and docks
The described multichannel orthogonal spectrum expansion signal received carries out signal condition；
Data processing division 22, for docking the multichannel orthogonal spectrum expansion signal number after receiving the conditioning of signal condition portion
According to process, to obtain the measurement parameter of described wireless channel.
The receiver 2 that the embodiment of the present invention provides, it is possible to receive the multichannel from transmitter by wireless channel
Orthogonal spectrum expansion signal, and according to the survey of wireless channel described in the described multichannel orthogonal spectrum expansion signal acquisition received
Amount parameter.So, owing to using multichannel orthogonal spectrum expansion signal to communicate between transmitter and receiver 2,
Namely within the same time period, complete in multiaerial system the letter between all antennas pair in code division multiplexing mode
Road is measured, it is to avoid carry out antenna switching frequently in finite time such that it is able in mobile terminal speed and
When operating frequency significantly improves, remain able to be accurately measured the various parameters of wireless channel.
Optionally, as it is shown in figure 5, signal receives and conditioning portion 21 includes:
Reception antenna 211, for receiving multichannel orthogonal spectrum expansion signal by wireless channel；
Accept filter device 212, is connected with reception antenna 211, for orthogonal to the described multichannel received
Spread-spectrum signal is filtered；
Down-conversion device 213, device 212 is connected with accepting filter, for by filtered described multichannel just
Spread-spectrum signal is handed over to downconvert to baseband frequency.
Optionally, data processing division 22 can be specifically for:
Described multichannel orthogonal spectrum expansion signal after signal condition is carried out despreading operations to obtain described wireless communication
The impulse response function in road；
Described impulse response function is carried out parameter estimation, to obtain the measurement parameter of described wireless channel.
The transmitter and receiver provided the embodiment of the present invention below by specific embodiment is carried out in detail
Explanation.
As shown in Figure 6, in addition to locating module and high precision clock module, include at transmitter 3: control meter
Calculation machine 31, multichannel orthogonal spectrum expansion signal generator 32, upconverter 33, power amplifier 34, wave filter
35, antenna 36 is launched.Receiver 4 includes: control computer 41, reception antenna 42, wave filter 43,
Low-converter 44, A/D45, high-speed data processing module 46 and Back end data processing module 47.
For launching pusher side, according to test request, by control computer 31 and arrange transmitter working frequency range,
The parameters such as bandwidth of operation, antenna number and spacing, transmitter work schedule, provide in combination with locating module
Auxiliary information, such as: sending out and receive go-and-retum distance etc., the parameter such as power is launched in configuration.The additionally orthogonal expansion of multichannel
Frequently signal generator 32, upconverter 33, power amplifier 34, wave filter 35 are controlled by controlling to calculate
Machine 31 and the relevant parameter by its configuration.
After transmitter 3 completes parameter configuration, multichannel orthogonal spectrum expansion signal generator 32 is controlling computer 31
Control under, can produce by the sequential of Fig. 7 and meet the multichannel wideband orthogonal signal of configuration parameter requirement.
Concrete, in transmitter 3, multichannel orthogonal spectrum expansion signal generator 32 multiple signals produced
Being sent in the upconverter 33 on each road, in upconverter 33, signal is modulated onto required by configuration parameter
Frequency range after export, then through power amplifier 34, radiofrequency signal is amplified to the power required by configuration parameter,
Last wave filter 35 is transmitted by launching antenna 36 after filtering the harmonic component of signal.Above-mentioned up-conversion
The power etc. of frequency range, amplifier regulation all can be specified by control computer 31 within the specific limits.Additionally by
Upconverter 33, power amplifier 34, wave filter 35, transmitting antenna 36 constitute RF front end and can configure
Unit, this unit can be according to test request, such as: the frequency of test requires, the number of antennas of transmitter terminal is wanted
Ask, be replaced, drastically increase the adaptability of measurement system.
Same, for receiver side, according to test request, receiver is set by controlling computer 41
The parameters such as working frequency range, bandwidth of operation, antenna number and spacing, the auxiliary provided in combination with locating module
Information, such as the maximum doppler frequency estimated, the maximum multipath time delay etc. of estimation, and is determined by transmitter
Relevant configuration, the parameter such as work schedule configuring sample frequency, receiver.Wave filter 43, lower change
Frequently device 44, A/D45, high-speed data processing module 46 and Back end data processing module 47 are controlled by controlling
Computer 41 and the relevant parameter by its configuration.
Each antenna in reception antenna 42 passes to wave filter 43 after receiving radiofrequency signal from eating dishes without rice or wine, and passes through
Filtered radiofrequency signal is downconverted device 44 and moves to base band, and finally this baseband signal is completed by A/D45
Subsequent module is passed to after sampling.Above-mentioned down coversion frequency range, sampling rate etc. all can within the specific limits by
Control computer 41 to specify.Additionally by reception antenna 42, wave filter 43, low-converter 44, A/D45
Constituting RF front end and can configure unit, this unit can be according to test request, such as: the frequency of test requires,
The number of antennas requirement etc. of receiver end, is replaced, drastically increases the adaptability of measurement system.
High-speed data processing module 46 can under the control controlling computer 41 according to the work of receiver time
The sampled data that ordered pair A/D45 passes over stores, and records the time of storage data simultaneously.
After collecting the most complete channel data, under the control controlling computer 41, channel data
It is directed in Back end data processing module 47 carry out despreading operations ring with the impulse obtaining described wireless channel
Answer function；Then described impulse response function is carried out parameter estimation, thus obtains every survey of wireless channel
Amount parameter.By the channel parameter extracted being concluded and adding up, it is provided that final analysis result, such as:
Parameter value distribution etc..
The work schedule of transmitter and receiver can be as shown in Figure 7.Wherein, transmitter terminal has M transmitting
Antenna, when measuring, all antennas send spread spectrum based on the orthogonal sequence letter being each independently of the others simultaneously
Number；Being a measurement cycle with Tcy when sending data, this cycle is contained within K transmission activationary time Tt,
Each transmission activationary time Tt is then to constitute based on several orthogonal spreading sequence repeated arrangement；And it is the completeest
Whole channel measurement can be made up of several Tcy, however it is necessary that the most complete channel measurement time of guarantee is less than
Channel coherency time, the i.e. channel metastable time so that during measurement, channel the quasi-static characteristics keeps
Constant.Receiver end has N number of reception antenna, N bar branch road to receive radiofrequency signal of eating dishes without rice or wine independently of one another；?
In the work schedule of receiver, needs set when protecting interval Tg to activate more than maximum multipath time delay, reception
Long Tr is less than Tcy, so that the data received have complete multi-path information.
It should be noted that before one-shot measurement starts, can be according to measure planning and link budget, greatly
Cause to estimate the time delay distribution situation under surveyed scene, and according to time delay distribution situation, configure orthogonal spreading sequence
Cycle T cy and the length of protection interval Tg so that they are more than the maximum multipath time delay of channel, to protect
Card can receive all multipath components, thus obtains complete channel impulse response.
In another embodiment of the present invention, in the case of the high-speed mobile of mobile terminal, 10MHz is carried
The Massive MIMO of the 64*2 under Kuan carries out channel measurement.The coherence time of High-speed Circumstance lower channel is past
Toward within several milliseconds of time, as used switch switching mode, the most almost cannot gather within the time that this is extremely short
To be available for extract High Accuracy Parameter all antennas pair between channel data；And use the measurement system of code division mode
System, can record the channel data between all antennas pair within the same time, only need to according to the change of metering system,
The corresponding parser that adjusts can obtain high-precision channel characteristics in rear end.
Measuring process includes:
(1) build measurement system by Fig. 2 and calibrate；
(2) determine wireless environment according to scene to be measured, measurement system is carried out parameter configuration, same including clock
Step, protection interval are arranged；
(3) implement to measure: multichannel orthogonal spectrum expansion signal generator produces the orthogonal of the 64 a width of 10M of road band simultaneously
Spread-spectrum signal, by being sent to receiver through eating dishes without rice or wine by antenna after up-conversion, power amplification and filtering, receives
Radiofrequency signal is downconverted to base band by 2 reception antennas of machine respectively, then by A/D with 20M Sample/s
Speed signal is sampled, sampled result is placed in the middle of high-speed data storage apparatus.
(4), after completing one-shot measurement, control computer and import data to Back end data processing module is carried out point
Analysis.This step mainly comprises two aspects: 1, de-spread data, identifies between different antennae pair simultaneously
Multipath signal；2, utilize Highly precise FFT method algorithm, data are carried out channel parameter extraction.
(5) by observation for a long time and statistics, sum up and conclude channel characteristics and carry out Channel Modeling.
The transmitter and receiver that the present embodiment provides, to use code division multiplexing mode, within the same time period
Complete the channel measurement between all antennas pair in multiaerial system, for the channel measurement under new technique, new scene
Provide advantage.
Although being example purpose, having been disclosed for the preferred embodiments of the present invention, those skilled in the art will
It is also possible for recognizing various improvement, increasing and replace, therefore, on the scope of the present invention should be not limited to
State embodiment.
Claims (10)
1. a wireless channel measurement system, it is characterised in that including:
Transmitter, is used for generating multichannel orthogonal spectrum expansion signal and being passed through respectively by described multichannel orthogonal spectrum expansion signal
Wireless channel sends to receiver；
Receiver, is believed for being received the multichannel orthogonal spectrum expansion from described transmitter by described wireless channel
Number, and according to the measurement parameter of wireless channel described in the described multichannel orthogonal spectrum expansion signal acquisition received.
System the most according to claim 1, it is characterised in that described transmitter is for by described many
Road orthogonal spectrum expansion signal is sent to receiver via wireless channel by corresponding antenna respectively simultaneously.
System the most according to claim 1, it is characterised in that described measurement parameter include with down to
Few one: multidiameter delay, Doppler frequency shift, signal amplitude, signal arrive angle, signal leave angle.
System the most according to any one of claim 1 to 3, it is characterised in that described transmitter
Including:
Signal generation, is used for generating multichannel orthogonal spectrum expansion signal；
Signal condition and emission part, carried out for the multichannel orthogonal spectrum expansion signal generated by described signal generation
Signal condition, and the described multichannel orthogonal spectrum expansion signal after conditioning is sent to described reception via wireless channel
Machine.
System the most according to any one of claim 1 to 3, it is characterised in that described receiver
Including:
Signal receives and conditioning portion, for receiving multichannel orthogonal spectrum expansion signal by wireless channel, and to reception
To described multichannel orthogonal spectrum expansion signal carry out signal condition；
Data processing division, for the multichannel orthogonal spectrum expansion signal number received signal and after the conditioning of conditioning portion
According to process, to obtain the measurement parameter of described wireless channel.
6. a transmitter, it is characterised in that including:
Signal generation, is used for generating multichannel orthogonal spectrum expansion signal；
Signal condition and emission part, carried out for the multichannel orthogonal spectrum expansion signal generated by described signal generation
Signal condition, and the described multichannel orthogonal spectrum expansion signal after conditioning is sent to receiver via wireless channel.
Transmitter the most according to claim 6, it is characterised in that described signal condition and emission part
Including:
Means of upconversion, is connected with described signal generation, for becoming on described multichannel orthogonal spectrum expansion signal
Frequency is to carrier frequency；
Power amplifier device, is connected with described means of upconversion, for the signal after up-conversion is carried out power
Amplify；
Launch filter, be connected with described power amplifier device, for the signal after power amplification is carried out
Filtering；
Launch antenna, be connected with described transmitting filter, for filtered signal is sent to wireless communication
Road.
8. a receiver, it is characterised in that including:
Signal receives and conditioning portion, for receiving multichannel orthogonal spectrum expansion signal by wireless channel, and to reception
To described multichannel orthogonal spectrum expansion signal carry out signal condition；
Data processing division, carries out data for docking the multichannel orthogonal spectrum expansion signal after receiving the conditioning of signal condition portion
Process, to obtain the measurement parameter of described wireless channel.
Receiver the most according to claim 8, it is characterised in that described signal receives and conditioning portion
Including:
Reception antenna, for receiving multichannel orthogonal spectrum expansion signal by wireless channel；
Accept filter device, is connected with described reception antenna, for the described multichannel orthogonal spectrum expansion received
Signal is filtered；
Down-conversion device, is connected with the described device that accepts filter, for by the filtered orthogonal expansion of described multichannel
Frequently signal downconverts to baseband frequency.
Receiver the most according to claim 8, it is characterised in that described data processing division, specifically
For:
Described multichannel orthogonal spectrum expansion signal after signal condition is carried out despreading operations to obtain described wireless communication
The impulse response function in road；
Described impulse response function is carried out parameter estimation, to obtain the measurement parameter of described wireless channel.
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| CN201510031187.6A CN105871483A (en) | 2015-01-21 | 2015-01-21 | Wireless channel measurement system, transmitter and receiver |
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| CN201510031187.6A CN105871483A (en) | 2015-01-21 | 2015-01-21 | Wireless channel measurement system, transmitter and receiver |
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Application publication date: 20160817 |