CN105991490A - Filter bank-based signal transmitting method, receiving method, system and devices - Google Patents

Abstract

The invention discloses a filter bank-based signal transmitting method. The method includes the following steps that: a transmitter obtains pre-equalization configuration information, wherein the pre-equalization configuration information indicates whether to enable pre-equalization; when the pre-equalization configuration information indicates enabling pre-equalization, the transmitter generates a pre-equalization parameter according to a pre-equalization mode, carries out pre-equalization operation on transmitted signals according to the pre-equalization parameter, and carries out filter bank-based modulation. The invention also discloses a filter bank-based signal receiving method as well as a corresponding transmitter, receiver, communication method and communication system. With the methods, the transmitter, the receiver, the communication method and the communication system of the invention, flexibility can be provided, performance can be ensured when network load is high under a condition that trailing is not cut off, and therefore, the spectrum efficiency of an FBMC system can be maximized; and when network load is low, the influence of trailing can be avoided through changing the configuration of sub frames, and therefore, the quality of services for users can be guaranteed as far as possible.

Description

Signal method of sending and receiving based on bank of filters, system and device

Technical field

The application relates to wireless communication technology field, particularly relates to a kind of signal based on bank of filters and sends and connect Receiving method, system and device.

Background technology

Along with the fast development of information industry, especially from mobile Internet and Internet of Things (IoT, internet of Things) increased requirement, brings unprecedented challenge to future mobile face.As according to the world The report ITU-R M. [IMT.BEYOND 2020.TRAFFIC] of telecommunication union ITU, it is contemplated that to 2020 Year, mobile service amount relative 2010 (the 4G epoch) of growth will increase nearly 1000 times, and subscriber equipment connects number Also will be more than 17,000,000,000, along with the IoT equipment of magnanimity gradually penetrates into mobile communications network, connecting number of devices will More surprising.In order to tackle this unprecedented challenge, communications industry circle and academia have expanded widely 5th third-generation mobile communication technical research (5G), towards the year two thousand twenty generation.At present at the report ITU-R of ITU M. [IMT.VISION] is discussing framework and the overall goals of following 5G, wherein the demand to 5G look forward to, Application scenarios and every important performance indexes elaborate.For the new demand in 5G, the report of ITU ITU-R M. [IMT.FUTURE TECHNOLOGY TRENDS] provides the technological trend for 5G and is correlated with Information, it is intended to solve throughput of system be obviously improved, Consumer's Experience concordance, autgmentability with support IoT, time Prolong, efficiency, cost, network flexibility, the support of emerging service and the prominent question such as spectrum utilization flexibly.

Modulation waveform and multi-access mode are the important foundations that wireless communications air interface (air-interface) designs, At 5G also no exception.Currently, multi-carrier modulation (Multi-carrier Modulation, MCM) technology family In Typical Representative OFDM (Orthogonal Frequency Division Multiplexing, OFDM) Being widely used in Voice & Video field and the commercial signal communication system of broadcast type, the such as third generation moves The Evolved that Partnership Project (3rd Generation Partnership Project, 3GPP) is formulated Long Term Evolution (the Long Term that Universal Terrestrial Radio Access (E-UTRA) agreement is corresponding Evolution, LTE) system, digital video (Digital Video Broadcasting, the DVB) sum in Europe Word audio broadcasting (Digital Audio Broadcasting, DAB), very-high-bit-rate digital subscriber loop (Very-high-bit-rate Digital Subscriber Loop, VDSL), IEEE802.11a/g WLAN (Wireless Local Area, WLAN), IEEE802.22 wireless MAN (Wireless Regional Area Network, WRAN) and IEEE802.16 worldwide interoperability for microwave access (World Interoperability for Microwave Access, WiMAX) etc..It is known that the basic thought of OFDM technology is to be believed in broadband Road is divided into multiple parallel narrowband subchannels/subcarrier so that the high speed number of transmission in frequency-selective channel Being the low rate data streams of transmission in multiple smooth subchannels of parallel independence according to rheology, the system of greatly strengthen is supported The ability of anti-multipath jamming, and OFDM can utilize quick inversefouriertransform and fast Fourier transform (IFFT/FFT) realization of the modulation and demodulation simplified；Secondly, by add Cyclic Prefix (Cyclic Prefix, CP) make with the linear convolution of channel becomes circular convolution, thus according to the character of circular convolution, when CP length is big When channel maximum multipath time delay, simple single tap frequency domain equalization is utilized to achieve that without intersymbol interference (Inter-symbol Interference, ISI), thus reduce receiver and process complexity.Although based on CP-OFDM Modulation waveform can well support mobile broadband (Mobile broadband, the MBB) business demand in 4G epoch, But 5G will face more challenge and more rich scene, and this makes its CP-OFDM go out in the scene of 5G The biggest restriction or weak point, be mainly manifested in:

(1) add CP to resist the scene that ISI transmits at 5G low time delay and can reduce the availability of frequency spectrum greatly, Because the symbol lengths of OFDM will be greatly shortened in low time delay transmission, and the length of CP is only limited by being formed on channel Shock response, then the length of CP can be greatly increased with the ratio of the symbol lengths of OFDM, and such expense is made Become loss of spectral efficiency very big, be difficult to accept.

(2) strict time synchronized requires to cause the biggest closed-loop synchronization to safeguard institute in the IoT scene of 5G The signaling consumption needed, and strict synchronization mechanism causes frame structure nonelastic, it is impossible to well support multiple industry The different synchronisation requirement of business.

(3) OFDM uses rectangular pulse to shape (rectangular pulse) and causes the biggest band outward leakage, because of Cause the secondary lobe of its frequency domain to roll-off for such waveform very slow, this be also why OFDM to frequency deviation (CFO, Central frequency offset) highstrung reason, and 5G connects flexibly by having a lot of fragmentation frequency spectrums The demand entering/sharing, the band outward leakage of OFDM significantly limit the motility of frequency spectrum access to be needed very in other words Big frequency domain protection carries thus reduces the utilization rate of frequency spectrum.

These deficiencies are mainly caused by the inherent character of himself, although by taking certain measure, can To reduce the impact that these shortcomings cause, but the complexity of system design can be increased, and cannot fundamentally solve Problem.

Just because of this, such as the report ITU-R M. [IMT.FUTURE TECHNOLOGY TRENDS] of ITU It is described, within some new waveform modulated technology (based on multi-carrier modulation) are included into the limit of consideration of 5G.Wherein, Multicarrier based on bank of filters (FBMC:Filter Bank Multiple Carrier) modulation technique becomes focus One of object of study is owing to it provides the degree of freedom that formed filter (Prototype Filter) designs, permissible Use time-frequency domain focusing (Time/frequency localization, TFL) well wave filter that transmitted waveform is entered Horizontal pulse molding so that transmission signal can show multiple preferably characteristic, including need not CP to resist ISI Thus improve spectrum efficiency, relatively low band outward leakage thus well support flexibly fragmentation frequency spectrum access, and Insensitive to frequency deviation.One is generally used to be called offset orthogonal amplitude modulation(PAM) than more typical FBMC system (OQAM:Offset Quadrature Amplitude Modulation) technology reaches spectrum efficiency and maximizes, So commonly referred to FBMC/OQAM system, it is possible to it is referred to as OFDM/OQAM system.Use about FBMC It is referred to an early literatures " Analysis and design of OFDM/OQAM systems in digital communication based on filter bank theory”,IEEE Transactions on Signal Processing,Vol.50,No.5, 2002.

FBMC has the good characteristic not available for some OFDM, thus obtains in 5G studies and pay close attention to, But itself some intrinsic shortcoming makes it apply in a wireless communication system and there is also many challenges, this During a little challenges being badly in need of solving constantly are studied.One of them significant problem is exactly that FBMC uses Wave filter can cause time domain waveform to have longer smearing (tail effect), also referred to as changes matter of time (transition period problem).Up transmit based on short data block time, if data block length extension Comprising hangover avoids hangover with the overlap of other data blocks, then in effective time, the symbolic number of transmission will subtract Few, this can reduce spectrum efficiency greatly, so having saying is that FBMC is only suitable for long data transmission, the most such as Really data block length does not comprise hangover, and that means that trailing portion can be overlapping with other data blocks, processes bad Will result in the biggest interference, thus also can limit spectrum efficiency.Trailing portion is entered by method exactly that have at present Row blocks, thus avoids with other data blocks are overlapping, but blocks waveform and can cause distorted signals, with Sample influences whether spectrum efficiency, and the signal spectrum blocked in addition can cause extension, also can increase between subcarrier The interference of (inter-carrier-interference, ICI), such blocking is not a kind of effective method.

In sum, the FBMC to be promoted competitiveness in 5G candidate technologies, we except exploitation its Outside advantage, in addition it is also necessary to solve himself not enough, for the scattered short data block biography under particularly IoT scene in 5G The business model of defeated (Sporadic Access), we are highly desirable to solve FBMC by effective method The problem brought of smearing.

Summary of the invention

The technical problem to be solved is in FBMC system during up transmission based on data block Tailing problem, the most not yet has a kind of very effective method to reduce the impact that hangover brings.To this end, this Shen Please provide a kind of communication system based on bank of filters and signal method of sending and receiving thereof, it is provided that a kind of effective Configurable pre-equalization process, can ensure performance in the case of not blocking hangover, maximize FBMC system The spectrum efficiency of system.

A kind of based on bank of filters the signaling method that the application provides, including:

Transmitter obtains preequalization configuration information, and described preequalization configuration information indicates whether to open preequalization；

When preequalization is opened in the instruction of preequalization configuration information, transmitter generates preequalization ginseng according to preequalization mode Number, and carry out preequalization operation according to pre-equalization parameters to sending signal, then carry out tune based on bank of filters System.

It is preferred that described preequalization configuration information is included in the scheduling control signaling that transmitter obtains.

It is preferred that described transmitter also obtains when preequalization is opened and the time of closedown institute from described scheduling control signaling The subframe type information used, sends the number of symbol and first symbol in described subframe type information instruction subframe Delivery time.

It is preferred that described preequalization mode is prespecified or is included in preequalization configuration information.

It is preferred that described preequalization mode includes: amplitude and phase place are all carried out preequalization, or, only to phase Position carries out preequalization.

It is preferred that when preequalization mode is for all carrying out preequalization to amplitude and phase place, described according to preequalization side Formula generates pre-equalization parameters and includes: channel condition information and preequalization mode according to obtaining generate pre-equalization parameters, The equivalent channel frequency response of described pre-equalization parameters and channel frequency response synthesis is real number or imaginary part levels off to 0, and the mould of equivalent channel frequency response levels off to 1.

It is preferred that when preequalization mode is for only carrying out preequalization to phase place, described generate according to preequalization mode Pre-equalization parameters includes: channel condition information and preequalization mode according to obtaining generate pre-equalization parameters, described The equivalent channel frequency response of pre-equalization parameters and channel frequency response synthesis is real number or imaginary part levels off to 0, and The mould of equivalent channel frequency response levels off to the mould of channel frequency response.

It is preferred that described channel condition information is obtained by channel reciprocity.

It is preferred that when preequalization mode is for only carrying out preequalization to phase place, described generate according to preequalization mode Pre-equalization parameters includes: obtains phase place by the feedback of receiver and indicates, and the phase place instruction according to obtaining generates pre- Balance parameters.

It is preferred that transmitter obtains the phase information of the channel frequency response quantified according to the instruction of described phase place, and The frequency plot response coefficient in distributed bandwidth is generated as Pre-FDE parameter according to described phase information.

It is preferred that the method also includes: frequency domain is divided into some subbands, and phase place instruction is to refer to based on subband Showing, subband number is more than or equal to 1, and transmitter generates according to the corresponding relation of phase place instruction and subband and distributed Pre-FDE parameter in bandwidth.

It is preferred that transmitter obtains the phase information of the channel impulse response quantified according to the instruction of described phase place, and It is transformed into the frequency plot response coefficient of correspondence as Pre-FDE parameter.

It is preferred that the method also includes: the phase information of the channel impulse response of described quantization is in multipath channel The phase information of a strongest paths, or be that in multipath channel, the phase place of the X paths that energy is the strongest is carried out The phase information averagely synthesized, wherein X is more than 1.

It is preferred that increase phase place indication bit territory or special feedback channel obtain up transferring in authorization signaling Take described feedback.

Present invention also provides a kind of signal acceptance method based on bank of filters, including:

Receiver judges whether demodulation based on bank of filters according to the preequalization configuration information being indicated to transmitter Signal carries out post-equalization；Described preequalization configuration information indicates whether to open preequalization；

When preequalization is opened in the instruction of preequalization configuration information, and preequalization mode is for all to carry out pre-to amplitude and phase place During equilibrium, receiver does not carries out post-equalization to demodulated signal based on bank of filters；

When preequalization is opened in the instruction of preequalization configuration information, and when preequalization mode is only phase place to be carried out preequalization, The equivalence letter that demodulated signal based on bank of filters is synthesized by receiver according to pre-equalization parameters and channel frequency response Road frequency response carries out post-equalization；

When the instruction of preequalization configuration information does not carries out preequalization, receiver is to demodulated signal based on bank of filters Channel frequency response according to estimating carries out amplitude and phase place post-equalization.

It is preferred that the described equivalent channel frequency response synthesized according to pre-equalization parameters and channel frequency response is carried out Post-equalization includes: receiver have employed the reference signal direct estimation estimated for channel of preequalization by reception Pre-equalization parameters and the equivalent channel frequency response of channel frequency response synthesis, or receiver is by being provided without The reference signal of preequalization first does the preequalization mode indirect Estimation preequalization that channel is estimated to use further according to transmitter Parameter and the equivalent channel frequency response of channel frequency response synthesis, described equivalent channel frequency response is for base Demodulated signal in wave filter carries out post-equalization.

It is preferred that described preequalization mode is prespecified or is included in preequalization configuration information.

Present invention also provides a kind of transmitter based on bank of filters, including: control signaling processing module, pre- Equalizer switch, information source, pre-equalization parameters generation module and transmission synthesis filter banks, wherein:

Controlling signaling processing module, be used for obtaining preequalization configuration information, the instruction of described preequalization configuration information is No unlatching preequalization；

When the instruction of preequalization configuration information carries out preequalization, control signaling processing module control preequalization switch and connect Logical pre-equalization parameters generation module, the real number signal that information source produces by pre-equalization parameters generation module generated pre- After balance parameters carries out pre-equalization process, then it is modulated by sending synthesis filter banks；

When the instruction of preequalization configuration information does not carries out preequalization, control signaling processing module and control preequalization switch Connecting and send synthesis filter banks, the real number signal that information source produces directly is modulated by transmission synthesis filter banks.

It is preferred that described preequalization configuration information is obtained from scheduling control signaling by controlling signaling processing module.

It is preferred that pre-equalization parameters generation module generates described pre-equalization parameters according to preequalization mode；Described pre- Balanced way is prespecified or is included in described preequalization configuration information.

Present invention also provides a kind of receiver based on bank of filters, including: receive analysis filterbank, after Equalizer switch, post-equalization parameter generation module and treating excess syndrome portion operation module；Wherein:

Described post-equalization switch judges whether to dock contracture analysis filter according to the preequalization configuration information being indicated to transmitter The demodulated signal of ripple device group carries out post-equalization；Described preequalization configuration information indicates whether to open preequalization；

When preequalization is opened in the instruction of preequalization configuration information, and preequalization mode is for all to carry out pre-to amplitude and phase place During equilibrium, post-equalization switch connection receives analysis filterbank and treating excess syndrome portion module；

When preequalization is opened in the instruction of preequalization configuration information, and when preequalization mode is only phase place to be carried out preequalization, Preequalization mode is sent to post-equalization parameter generation module by post-equalization switch, and connects reception analysis filterbank Generated balance parameters with post-equalization parameter generation module by post-equalization parameter generation module, and dock contracture analysis filtering After the demodulated signal of device group carries out amplitude post-equalization process, it is sent to treating excess syndrome portion module；

When the instruction of preequalization configuration information does not carries out preequalization, post-equalization switch connection receives analysis filterbank With post-equalization parameter generation module, post-equalization parameter generation module generate balance parameters, and dock contracture analysis filter After the demodulated signal of ripple device group carries out amplitude and the process of phase place post-equalization, it is sent to treating excess syndrome portion module.

It is preferred that described preequalization mode is prespecified or is included in preequalization configuration information.

The OQAM signalling case of herein described configurable preequalization, provides motility to network scheduling, Spectrum efficiency can be ensured by transmitting signal is carried out preequalization in the case of network high capacity as far as possible, The impact of hangover can be avoided again by changing the configuration of subframe offered load is low when, such that it is able to the greatest extent Amount ensures QoS of customer.

Accompanying drawing explanation

Fig. 1 is that the signal of a kind of FBMC/OQAM generates schematic diagram；

Fig. 2 (a) is FBMC/OQAM hangover schematic diagram when transmitting based on burst；

Fig. 2 (b) is the schematic diagram that data block waveform does not has overlap；

Fig. 2 (c) is the schematic diagram that data block waveform portion is overlapping；

Fig. 3 is the FBMC/OQAM system schematic using the application；

Fig. 4 is that the preequalization OQAM signal of the embodiment of the present application one sends and receives schematic diagram；

Fig. 5 is that the OQAM signal not configuring preequalization of the embodiment of the present application one sends and receives schematic diagram；

Fig. 6 is that the preequalization OQAM signal of the embodiment of the present application two sends and receives schematic diagram.

Detailed description of the invention

For making the purpose of the application, technical scheme and advantage clearer, develop simultaneously enforcement referring to the drawings Example, is described in further detail the application.

Use modulation system FBMC based on bank of filters technology, it is possible to obtain there is more preferable time-frequency focusing Signal waveform, such as based on Isotropic Orthogonal Transform Algorithm (IOTA, isotropism Orthogonal transformation algorithm), based on Extended Gaussian Function (Gaussian function) and Europe PHYDYAS Deng ptototype filter function.FBMC uses time-frequency domain focusing (Time/Frequency Localization, TFL) Well formed filter carries out pulse-shaping (pulse shaping) to the signal of each subcarrier, and this makes:

1) FBMC can need not the ISI that CP also can greatly suppress multipath to bring, and not only can carry relative to OFDM Come higher spectrum efficiency and energy efficiency, good reception Shandong can be obtained under bigger time error simultaneously Rod, thus allow the transmission that non-critical synchronizes；

2) having benefited from good frequency focusing, FBMC can transmit signal in the narrowest frequency resource and protect Hold low-down band outward leakage, such that it is able to preferably suppress the carrier wave brought due to Doppler or phase noise etc. Between disturb ICI.

Therefore, FBMC accesses at the frequency band of cognitive radio, fragmentation and has in the scene such as non-synchronous transmissions Potentiality greatly.

For obtaining the highest spectral efficiency at FBMC, need to use offset orthogonal amplitude modulation(PAM) (OQAM:Offset Quadrature Amplitude Modulation) technology, referred to as FBMC/OQAM or OFDM/OQAM, after Face is referred to as OQAM.In OQAM, a qam symbol is divided into two paths of signals, is alternately adjusted respectively Make real part and the imaginary part of a subcarrier, and sent by method staggered in time.At receiving terminal, as Fruit does not has the impact of channel, alternately extracts real part and the imaginary part of signal on each subcarrier, can recover to send letter Number.Fig. 1 is that the signal of a kind of FBMC/OQAM generates schematic diagram, OQAM signal formula table from behind Reach the effect being readily appreciated that each module.The multicarrier FBMC/OQAM letter of Time Continuous (continuous-time) Number base band equivalents equation below (1) can be used to express:

Wherein: ()_m,nRepresent frequency time point (frequency-time point)；

a_m,nFor the real modulation signal sent on the m-th subcarrier of nth symbol, namely pulse width Degree modulation symbol (PAM)；

a_m,nIt is τ=2 τ for symbol period₀Plural QAM (Quadrature Amplitude Modulation) symbol NumberReal part or imaginary values, such as

WithIt is respectively treating excess syndrome imaginary part；

J is imaginary number symbol, j^m+nRepresent real void alternately；

M is that even number represents subcarrier number；

Ζ is the assemble of symbol sent；

ν₀For subcarrier spacing；

τ₀For the symbol period of OQAM, τ₀=τ/2=1/ (2v₀)；

G is ptototype filter function, and its time domain shock response length is generally Κ times of τ, like this causes phase The time domain waveform of adjacent (2 Κ-1) individual symbol can partly overlap, so K is commonly referred to as the overlap factor of wave filter (Overlapping Factor)；

g_m,nT () is for going to modulate a_m,nOverall composite filter function (synthesis filter).

Can be seen that the symbol rate of OQAM is 2 times of tradition OFDM symbol rate, and not pended cyclic prefix CP, and because the modulation of OQAM is real number, the quantity of information of each OQAM symbol is tradition OFDM Half.

The real number field orthogonality of OQAM is by prototype filter function g so that synthesis filter during transmission The inner product (Inner Product) of analysis filter function when ripple device function and reception meets or approximation meets public affairs Formula (2) realizes, and namely ptototype filter needs to meet:

Wherein, * represents complex conjugate,Operating for treating excess syndrome portion,<|>represents inner product, if m=m', n=n' Then δ_m,m'=1, δ_n,n'=1, it is otherwise 0, say, that if m ≠ m' or n ≠ n', then inner product is pure imaginary number , for convenience inner product is usedRepresent.Signal between different sub carrier and distinct symbols obviously Itself cause is the interference of pure imaginary part, then signal s (t) of FBMC/OQAM modulation is undistorted through one (distortion-free) during channel, to the signal received with sending composite filter (Synthesis Filter, SF) g_m,nT reception analysis filterbank (Analysis Filter, AF) that () matchesLetter is carried out according to formula (3) Single operation, it is possible to originally transmitted real number signal a_m,nPerfect reconstruct (Perfect Reconstruction, PR) out, η₀It is noise item, and then synthesis plural number QAM signalJust can demodulate initial data.

But channel is not undistorted in reality, it is commonly known that channel usually because multipath and present frequency domain selectivity Decline and/or because Doppler's presentative time Selective intensity, simply channel impulse response be expressed as | | h | | (norm) is amplitude of variation,Change for phase place, it is assumed that channel is at unit symbol period and unit subcarrier In bandwidth constant, use H_m,nRepresent channel h (t) frequency response (frequency on subcarrier m when symbol n Response), then the signal received can be expressed as:

$r\left(t\right)=\underset{n\&Element;Z}{\mathrm{\&Sigma;}}\underset{m=0}{\overset{M-1}{\mathrm{\&Sigma;}}}{H}_{m,.n}{a}_{m,n}\left(t\right)+n\left(t\right)---\left(4\right)$

Certainly the channel of this plural number can destroy the real number field orthogonality of OQAM, with demodulation a_m0,n0As a example by, As shown in formula (5), directly to y_m0,n0Carry out the operation for the treatment of excess syndrome portion and can not reduce a_m0,n0, and must carry out extra Operation with eliminate or farthest reduce H_m,nDestruction to real number field orthogonality.

Above_Im0,n0With the focus characteristics of ptototype filter designs relevant, so the most intrinsic interference (intrinsic Interference), the characteristic of ptototype filter g function makes in the intrinsic distracter on (m0, n0), and only periphery has Limit (m, n) ≠ (m0, n0) symbol can bring the impact can not ignore rather than all, namely pure imaginary number Only (m, n) ≠ (m0, n0) its absolute value of place is bigger can not ignoring, other the least, closely limited Being seemingly zero or be zero, then for relative noise, part below can be ignored completely and have only to pay close attention to week Those symbols that limit is limited.Limited for the periphery that cannot ignore (m, n) ≠ (m0, n0) value set Ω_Δm,Δn={ (p, q), | p-m0 |≤Δ m, | q-n0 |≤Δ n} represents that (this set is corresponding with the time-frequency focusing of ptototype filter function ), then Im0, n0 can be further rewritten as:

According to formula (5) and (6), can will be apparent from knows, wants by simple frequency domain channel equalization Eliminate ξ_m0,n0And reduce a_m0,n0, need to meet formula below (7) condition, although namely when being of process Become multipath channel, but at Ω_{Δ m, Δ n}In representative subrange, it is relevant for needing channel, and this is the most former The design of mode filter is intended to match channels characteristic, and time-frequency focusing is the best, then corresponding Ω_{Δ m, Δ n}Scope is just The least, condition (7) more readily satisfies.

H_mo,no≈H_p,q, (p, q) ∈ Ω_{Δ m, Δ n} (7)

Thus the signal after receiving filter shown in formula (5), can be approximated to the form of formula (8):

As long as so the channel frequency response at (m0, n0) place being equalized, it is possible to sent out by treating excess syndrome portion operation handlebar again The a sent_m0,n0Restore.

To sum up, although FBMC/OQAM symbol in time domain be partly overlapping and subcarrier in frequency domain also unlike OFDM is that complex field is orthogonal, and the real void of OQAM replaces and the focusing design of ptototype filter makes demodulated signal Output is when meeting the condition of formula (7), it is also possible to by simple frequency domain equalization, the impact of channel is eliminated, Thus recover real number field orthogonality, more just can be demodulated the signal of transmission by the operation for the treatment of excess syndrome portion.Typically The available formula (9) of OQAM signal equalization detection represents, wherein SINR represents when there is multi-user interference Signal to Interference plus Noise Ratio.

| | || for modulo operation

For descending or up unique user transmit for, as long as ptototype filter design can match channels time Continuation exhibition (Delay Spread) and/or Doppler frequency extend (Doppler Frequency Spread), so Reasonably arranging subcarrier spacing and data transmission period, the condition in formula (7) still can substantially meet, Thus ICI and ISI can ignore.But present invention applicant think for FBMC/OQAM up multiplex User data block transmits, and the condition of formula (7) is relatively difficult to meet, because the signal of up different user arrives Reach the channel that base station experienced the most incoherent, so there being the different user time domain of overlap adjacent on frequency domain Set omega_Δn={ | q-n0 |≤Δ n} is difficult to be considered relevant, and the hangover of this FBMC/OQAM the most just is up multiplex Effective scheme is needed to do the reason of process especially during the transmission of user data block.

Tailing problem is the most first described.Telecommunication system resources is typically to be divided into temporal frequency list according to temporal frequency Unit (resource grid), then forms the temporal frequency unit of these minimums the basic resource blocks being prone to scheduling. Transmission Time Interval (transmission time interval, TTI) that such as communication standard is said or subframe (subframe, also referred to as burst) that is time on basic resource blocks transmission concept；On frequency domain then with The size of bandwidth defines the concept of basic resource blocks, such as several subcarriers, and the data block of end user is It is mapped on Resource Block transmission.OFDM is because use square waveform, so each on a Resource Block Symbol is the not overlap and then arranged, and FBMC/OQAM is because of the length of the ptototype filter used Long, although to be every τ₀Send a symbol, but the length of each symbol is not the most as OFDM With symbol period coincide but having exceeded many, the data block of the most multiple symbols composition arises that and is front and back respectively arranged with Part hangover.The waveform of ptototype filter, data burst burst on subcarrier 0 as given by Fig. 2 (a) 1 is the data block of first user's transmission, and data burst burst 2 is the data block of second user, data Frame burst 3 is the data block of third party, and length is all L_B, comprise several OQAM symbols, each burst Hangover to contain length be all L_TFront tail (pre-tail) and rear tail (post-tail) two part, trailing length takes Certainly in the length of ptototype filter, it can be seen that hangover causes the waveform of data block to have overlap, then that brings is dry Disturb and be accomplished by solving；And be that the data block waveform of user does not has overlapping cases given by Fig. 2 (b), this time Wait and be accomplished by reducing OQAM symbol to be sent out in each data block, then thus cause waste；Fig. 2 (c) Be given is, and the data block waveform of user is partly overlapping situation, can be as compromise consideration in actual design. Avoiding waste if additionally blocked by hangover, wave distortion can be caused thus ICI can be additionally introduced, this The mode of kind uses after needing well to assess attainable spectrum efficiency cautiously.

For the problems referred to above, the present invention proposes FBMC/OQAM system and this system of a kind of configurable preequalization Signal method of sending and receiving, Fig. 3 gives the schematic diagram of the present invention, describes the present invention below in conjunction with Fig. 3 The operation principle of FBMC/OQAM system:

A) control Signaling Processing Unit (302) and obtain scheduling control signaling from network dispatcher (301), also referred to as For scheduling authorization signaling (scheduling grant), described scheduling authorization signaling is including at least resource distribution and maps Information and preequalization configuration information.It is preferred that resource distribution and map information are used for indicating transmission data time institute The temporal frequency position of Resource Block, unit resource block or subframe burst on OQAM symbolic number and Send data to the mapping of Resource Block；Preequalization configuration information is when instruction sends data in respective resources No unlatching preequalization, further, if opening preequalization, it is also possible to configuration preequalization mode, or also may be used In prespecified preequalization mode.Preequalization mode may include that based on channel reciprocity (Channel Reciprocity) amplitude and phase place are all carried out preequalization, or, only phase place is carried out pre-based on channel reciprocity Equilibrium, or, only phase place is carried out preequalization based on Limited Feedback (limited feedback)；Preequalization side Formula correspondingly determines pre-equalization parameters W_pre.Further, unit when being configured with preequalization and do not configure preequalization On Resource Block or subframe burst OQAM symbolic number be set as different, it may be assumed that preequalization can be configured and open The subframe type information used when opening and when closing, sends symbol in described subframe type information instruction subframe Number and the delivery time of first symbol.Different subframe type namely can be set, in different subframe type The length difference outside subframe is stretched out in hangover, and it is realized by the OQAM symbolic number of transmission in setting unit subframe, It is configured with preequalization and does not configure preequalization and use different subframe type respectively.

B) signal source (303) gets out data to be sent according to the resource of distribution, and these data are real number signal, Use a_m,nRepresent.

C) preequalization switch (304) determines whether 303 outputs according to from the 302 preequalization configuration informations obtained Real number signal a_m,nPreequalization is carried out before carrying out OQAM modulation.When being configured to be not turned on preequalization, real Number signal is by directly carrying out OQAM modulation, now to transmission synthesis filter banks (306) after serial/parallel conversion The available formula (1) of output s (t) represents；When being configured to open preequalization, pre-equalization parameters signal generating unit (305) According to the channel condition information obtained and the preequalization mode of configuration, generate pre-equalization parameters (pre-equalization coefficients)W_pre, first by described pre-equalization parameters to a_m,nAnticipate, so After carry out OQAM modulation to 306 again, generate OQAM signal s (t), it is therefore an objective to make this signal s (t) pass through Go back convergence after channel and meet the real number field orthogonality of OQAM, namely carry out preequalization for channel, so that Obtain the equivalent channel frequency response of their synthesisCan ignore, i.e. for real number or imaginary part are the leastIts InRepresent real number, ≌ represent equal to or convergence, H is channel frequency response；Or make on adjacent burst The equivalent channel frequency response of different userPhase place the most close, thus reduce the hangover interference that brings of overlap. Wherein:

When preequalization mode is for all carrying out preequalization to amplitude and phase place, it is generally required to obtain based on channel reciprocity Obtain more full channel condition information to be used for generating pre-equalization parameters W_pre, so that pre-equalization parameters and channel frequency The equivalent channel frequency response of response synthesis is real number or imaginary part levels off to 0, and the mould of equivalent channel frequency response Level off to 1, i.e.

When preequalization mode is for only carrying out preequalization to phase place, real system can be based on channel reciprocity in using Property obtain more full channel condition information be used for generating pre-equalization parameters W_preOr obtain phase place based on Limited Feedback Adjustment information is used for generating pre-equalization parameters W_pre, the former is so that pre-equalization parameters and channel frequency response synthesize Equivalent channel frequency response be real number or imaginary part levels off to 0, and the mould of equivalent channel frequency response levels off to letter The mould of road frequency response, i.e.So the channel destruction to OQAM real number field orthogonality can greatly be eliminated Thus obtaining good performance, the latter can only allow limited feedback overhead because real system uses, so only The phase place convergence of equivalent composite channel being adjusted so that between different user by the phase place quantified of trying one's best is identical, Thus reduced the channel destruction to the real number field orthogonality of OQAM by post-equalization as far as possible, only obtain the property of suboptimum Energy.

S (t) after preequalization can use formula (10) to represent.Wherein channel condition information used by preequalization can be Obtained by feedback or channel reciprocity (Channel Reciprocity).

D) receive analysis filterbank (307) OQAM signal r (t) having passed through channel received is carried out OQAM demodulates, output y_m,nRepresent.

E) the preequalization configuration information of transmitter it is indicated to according to network dispatcher, it is judged that module 308 judges whether The signal of 307 outputs is carried out post-equalization.Preequalization, and preequalization is carried out when sending data when being configured with The amplitude that mode is channel and phase place all carry out preequalization, the most not the output y to 307_m,nCarry out post-equalization, and It is directly to carry out the operation for the treatment of excess syndrome portion to 310, thus obtains the transmission signal estimatedSending when being configured with Carry out preequalization during data, and the mode of preequalization for only carrying out preequalization, then the output y to 307 to phase place_m,n It is also performed to post-equalizationThe pre-equalization parameters now estimated according to post-equalization and channel frequency response synthesis Equivalent channel frequency response H～generate post-equalization parameter and equalize, post-equalization parameter (equalization used Coefficients) W is used^a _aftRepresent, equivalent channel frequency responseEstimation can by receiver receive have employed The reference signal estimated for channel after carrying out preequalization with pre-equalization parameters that data are identical is carried out direct estimation and is obtained Take, or receiver is estimated to use further according to transmitter by the reference signal being provided without preequalization is first done channel Preequalization mode indirect Estimation obtain, the signal after equilibrium carries out the operation for the treatment of excess syndrome portion to 310 again, thus obtains The transmission signal estimatedWhen being configured without carrying out preequalization when sending data, then the output to 307 y_m,nCarry out traditional amplitude and phase place carrying out channel equalization, balance parameters W used^b _aftRepresent, after equilibrium Signal carries out the operation for the treatment of excess syndrome portion to 310 again, thus obtains the transmission signal estimatedLetter needed for post-equalization Channel state information can be obtained by the known pilot signal estimated for channel.

Below by several preferred embodiments, technical scheme is further elaborated.

Specific embodiment one

In practical implementations, baseband signal is discrete (discrete-time) form directly generated, and it is continuous signal Sampled sequence on strict sample point, namely sampling frequency meets sampling theorem.FBMC/OQAM system The discrete baseband signal of system can describe with formula (11), and in formula (1), variable t has changed sampling time l into:

Wherein, L_gFor the length of ptototype filter, general L_g=KM, or KM-1 or KM+1, K is overlap factor, It is to ensure that causal system.Special instruction, the present invention is not related to concrete ptototype filter design, Fig. 2 A ptototype filter waveform that () is illustrated is only for example, and meets the ptototype filter function of formula (2) for approximation, Its time domain tap coefficient is $\{g\left(0\right)=0,g\left(l\right)=1-1.94392\cos \left(\frac{2\mathrm{\&pi;l}}{L_g}\right)+1.414\cos \left(\frac{4\mathrm{\&pi;l}}{L_g}\right)-0.47029\cos \left(\frac{6\mathrm{\&pi;l}}{L_g}\right),1\&le;l\&le;L_g-1\}.$

In the present embodiment, we give FBMC/OQAM system is time division duplex (Time Division Duplex, TDD) system, its parameter is subcarrier number M=512, subcarrier spacing ν₀=15khz, sampling Frequency is 7.68Mhz, repetition factor K=4, length L of ptototype filter_g=2048 sampling sampling point (sample). Further with regards to burst type, we set two kinds of different types: be called expansion sub-frame (Extended Burst, EB) and non-expanding subframe (Non-extended burst, NEB), the burst length of EB and NEB is all 0.4 Millisecond (ms), namely 3072 samples, additionally the length of explanation EB and NEB is also to pre-set Becoming different, system can support multiple subframe lengths in other words, and the present embodiment for convenience of explanation, is arranged to Identical.As shown in Fig. 2 (a), length L of EB_B=0.4ms=3072s amples, and before each burst The most each hangover, length is allEach EB includes 12 symbols, The hangover on both sides reaches outside burst；And the burst type in Fig. 2 (b) is exactly NEB, burst length is also It is L_B=0.4ms=3072s amples, but each burst includes 6 symbols as set by figure, because decreasing 6 Individual symbol, hangover, all in burst, does not expand to outside burst.Please note that we can also be according to Fig. 2 C arranging burst type shown in (), the most each burst comprises 8 symbols, it is allowed to part hangover is stretched Opening up outside burst, because the interference of trailing portion is smaller, concrete burst length and symbolic number depend on Overall consideration in system design.

The scheduling of the present embodiment multi-subscriber dispatching device includes two shown in table one kind in selecting and selects:

Table one

For convenience of description, it will be assumed that M subcarrier is all used for user data transmission and ignores resource distribution and reflect It is emitted through journey.

FBMC/OQAM TDD system (scheduling when being configured to preequalization and opening when above-mentioned configurable preequalization Option A), baseband signal sends and reception is respectively as follows:

Transmitter from the scheduling control signaling that network dispatcher sends know its signal demand sent carry out preequalization, And use the structure of EB to send signal, and transmitter is pre-all according to the channel reciprocity generation frequency domain of TDD Weighing apparatus parameter W_preTransmission signal being carried out preequalization and carries out OQAM modulation again, Fig. 4 gives band preequalization The one that OQAM signal sends and receives implements schematic diagram.See Fig. 4:

At transmitting terminal, 401 is the plural QAM modulation symbol modular converter to real number PAM signal of OQAM, 402 is preequalization module, and 403 use inverse fast Fourier transform (Inverse Fast Fourier for OQAM modulation Transform, IFFT) synthesis filter banks that adds multiphase filter (Polyphase Filtering) realizes module, 404 be and string modular converter.The OQAM signal having preequalization can use formula (12) to represent, such as Fig. 4 institute Signal, before carrying out IFFT, signal to be sent on each subcarrier has taken advantage of parameter W_pre, described preequalization Parameter is in order to avoid time-variant multipath channel destroys the real number field orthogonal property of OQAM, thus transmitter is according to letter Road reciprocity estimates the frequency response obtained when symbol n on subcarrier mGenerate according to formula (13), Formula (13) also can be called coupling preequalization algorithm, the channel estimated namely takes conjugation and is then in estimating The mould of channel square.

$W_{\mathrm{pre}}=\frac{{\hat{H}}_{m,n}^{*}}{{\left|\right|{\hat{H}}_{m,n}\left|\right|}^2},$ | | || for modulo operation (13)

At receiving terminal, 405 is serial/parallel conversion module, and 406 is with the reception synthetic filtering group of 403 couplings realizes mould Block, 407 is treating excess syndrome portion operation module, 408 for real number to complex conversion module, its operation is for corresponding to module 401 Inverse operation.OQAM signal r (l) of what receiver received passed through channel can represent with public (14):

According to formula (14) it is recognised that at channel estimation errors less than in the case of certain scope,With actual channel H_m,nBetween it is believed that equal, then the equivalent channel frequency response of synthesisThus receiver 406 modules the r (l) received is demodulated, to be output as y on (m0, n0)_m0,n0As a example by, such as formula (15) Shown in, it is clear that according to the design of ptototype filter, after that one can consider that it is imaginary number, so receive Machine is according to the preequalization information configured to transmitter before network dispatcher, directly from the output y of module 406_m,n It is input to module 407 and carries out the operation for the treatment of excess syndrome portion, it is possible to launch signal

It is obvious that described by above-mentioned pre-equalization approach, even if we can see that different users uses Fig. 2 (a) Shown multi-user's time division multiplex based on EB, hangover also will not cause because channel is unsatisfactory for formula (7) Severe jamming, say, that as long as the transmission signal of each user carries out preequalization according to channel, it is possible to allow to drag Tail is stretched over outside burst, uses the such mode of EB to transmit, it is ensured that spectrum efficiency maximizes.

Certainly, preequalization is to estimate ratio in the case of calibrated based on channel, and performance can be guaranteed.Work as offered load Ratio is the when of relatively low, and in order to ensure the service quality (Quality of service, Qos) of each user, network can be joined Put the FBMC/OQAM signal not doing preequalization based on NEB and send (scheduling option B), now OQAM The transmission of signal, as it is shown in figure 5, compare Fig. 4, has lacked a preequalization module, shown in many one 501 after Balance module, it is exactly the form shown in formula (11) that transmitter sends signal.As shown in Fig. 2 (b), because User have employed NEB transmission, does not has overlap between different user, so without the concern for the letter between different user Whether road meets the problem of formula (7), and for unique user, the overlapped signal on oneself burst because of For the condition of formula (7) can be met, so each receiver user has only to for oneself synthesis filter banks Output y_m,nDo equilibrium and just can reduce transmission signal, to be output as y on (m0, n0)_m0,n0As a example by, its form is exactly Formula (8), then as long as 501 modules of transmitter are according to the channel estimatedGeneration balance parameters, Now post-equalization mode is traditional channel equalization, can be least mean-square error (Minimum mean square Error, MMSE) equilibrium or matched filtering equilibrium etc., as a example by matched filtering equalizes, arrange Then by this parameter to y_m,nEqualize, then carry out the operation for the treatment of excess syndrome portion and just can reduce transmission signal, i.e.

From the present embodiment, we are referred to, and the OQAM signalling case of herein described configurable preequalization is to net Network scheduling provides motility, can ensure spectrum efficiency in the case of network high capacity as far as possible, bears at network It is readily modified as again the when of carrying low ensureing QoS of customer as far as possible.When burst does not grows, such as this reality Executing burst in example is 0.4ms, and the length of hangover is about 0.1167ms, and accounting is very big, if to keep away completely Overlap of exempting to trail can bring the biggest spectrum efficiency to be lost, so generally believing that FBMC system is not suitable for base before In the transmission of short burst, and the technology prejudice before can being broken completely by preequalization, expand further The range of application of FBMC/OQAM.

Specific embodiment two

In the present embodiment, it is contemplated that a kind of FBMC/OQAM is FDD (Frequency Division Duplex, FDD) system.As embodiment one, burst is also divided into EB and NEB two kinds, and parameter is arranged With embodiment one.In the present embodiment, the up transmission scheduling of scheduler includes two shown in table two kind choosing in selecting Select:

Table two

The present embodiment being assumed, transmitter can carry out, by many transmitting antennas, the wave beam that wave beam forming makes to launch There is good directivity, thus be energy most powerful path and major part energy concentration on accurate (boresight) direction of ripple Here, the channel impulse response (time domain) that when receiving this energy maximum diameter at receiver, receiver is estimated Can be simplified shown as|| h|| (norm) is amplitude,The phase place caused for propagation delay becomes Changing coefficient, receiver obtains the channel phase instruction of feedback on the feedback channelIt is rightMiddle θ quantifies, Use limit bit to send on the feedback channel, such as in the case of the channel direction of 360 degree, 6 bits and 8 bits Can characterize granularity is 5.625 degree and the channel direction information of 1.5 degree, and this granularity is for major part wave beam forming Space discrimination degree for be enough.Even if this energy maximum diameter has reflection path, it is assumed that we exist Receiving wave beam forming, we still can receive upper at an angle for a plurality of predominating path equivalence that can receive The path arrived, thus or useCarry out simplified characterization.

When being configured to preequalization and opening (scheduling option C), baseband signal sends and reception is respectively as follows:

From the scheduling control signaling that network dispatcher sends, transmitter knows that its signal demand sent carries out preequalization And for doing preequalization just for phase place, use the structure of EB to send signal.

Transmitter, according to the instruction of network dispatcher, obtains the quantization of receiver feedback by feedback channel? Arrive(time domain), transmitter is this channel phase informationBe converted into channel (m, n) on frequency plot ring Answer coefficientRepresent that frequency domain is changed with discrete Fourier transform (DFT) below, note: equivalence, the most instead Feedback channel can also directly feedback channel frequency plot respond directly generateFurther, described feedback Channel can be as a part of legacy upstream scheduling authorization signaling (uplink scheduling request), namely A newly-increased phase place indication bit territory；Downstream feedback channel can also be newly set up for base station, channel phase to be indicated Feed back to terminal.

Transmitter according toGenerate Pre-FDE parameter W_preTransmission signal is carried out preequalization carry out again OQAM modulates, and the transmission of preequalization OQAM signal and the one received that Fig. 6 gives the present embodiment are concrete real Existing schematic diagram.With Fig. 4 compares, the mode that the balance module of 601 generates pre-equalization parameters is different, adds simultaneously The post-equalization module of 602, other module is identical with the respective modules of Fig. 4.The preequalization that transmitter generates The pre-equalization parameters that OQAM signal and 601 modules generate can respectively with the formula (12) in embodiment one and Following (16) represent:

$W_{\mathrm{pre}}={\widehat{\stackrel{\&RightArrow;}{H}}}_{m,n}^{*}={\mathrm{DFT}}^{*}\left(\stackrel{\&RightArrow;}{h}\right)---\left(16\right)$

OQAM signal r (l) of what receiver received passed through channel can represent with formula (17):

According to formula (17), the main path concentrated very much if there is an energy, in the estimation of channel direction information In the case of error and quantization error are less than certain scope, the channel direction of estimation and the direction of actual channel are near Seemingly, thus namely phase place approximation, then the equivalent channel frequency response of synthesis is by convergence real number, namely empty Portion is the least, can ignore,R (l) is demodulated by receiver, to be output as on (m0, n0) y_m0,n0As a example by, it can be appreciated that the y of synthesis filter banks_m,nIt is that to meet real number field orthogonal, such as formula (18) for approximation Shown in, the Section 2 in formula is it is believed that be also imaginary number.

Receiver knows that phase place has only been done preequalization by transmitter, so 602 modules of receiver are according to estimation Channel frequency response is to expression-form y as shown in formula (18)_m,nEquivalent channel frequency response according to synthesis enters Row post-equalization, the reference signal for channel estimation that receiver have employed pre-equalization process by reception is directly estimated Meter obtains equivalent channel frequency responseOr receiver is provided without the ginseng of pre-equalization process by reception Examine signal acquisitionAnd receiver knows what transmitter usedThus indirectly know Namely generate post-equalization parameterThen with y_m,nIt is multiplied, then carries out the operation for the treatment of excess syndrome portion Can be obtained by launching signal

It can be seen that phase and amplitude is processed by preequalization and post-equalization respectively, it is possible to reduce the need of feedback quantity Ask.The channel phase of this feedback channels directional information (time domain) rather than directly feedback frequency domain can be further Reduce feedback overhead, simply need to be generated the channel phase on frequency domain by Fourier transformation at transmitter, but The complexity of this operation is the lowest.

When being configured to preequalization and closing (scheduling option D), scheduling option B of its process and embodiment one Process identical, the not repeated description at this.

Specific embodiment three

In the present embodiment, it is contemplated that a kind of FBMC/OQAM is FDD (Frequency Division Duplex, FDD) system.As embodiment one, burst is also divided into EB and NEB two kinds, and parameter is arranged With embodiment one.In the present embodiment, the up transmission scheduling of scheduler includes two shown in table three kind choosing in selecting Select:

Table three

The present embodiment being assumed, transmitter uses omnidirectional transmitter antenna to cross a time-variant multipath channel, the channel of t Shock response can simply use formula (19) to represent:

$h(t,\mathrm{\&tau;})=\underset{n}{\mathrm{\&Sigma;}}{C}_n\left(t\right)e^{j(2\mathrm{\&pi;}{f}_{\mathrm{Dn}}+{\mathrm{\&theta;}}_n)}\mathrm{\&delta;}\left(\mathrm{\&tau;}{-\mathrm{\&tau;}}_n\right))---\left(19\right)$

Wherein, f_DnDoppler frequency shift for nth bar footpath；θ_nThe phase shift caused for the propagation delay time in nth bar footpath；τ_n Arrive the relative time delay in footpath, and C relative to Article 1 for nth bar footpath_nT () is the complex gain in nth bar footpath；δ is Dirac Delta function.Can be seen that from this formula, for such multipath channel that there is power dissipation, directly feed back It is unpractical that time domain channel status information reconstructs channel impulse response phase information, and expense is the biggest.But Expanding according to multipath channel time delays, we can be divided into different relevant subbands, every height at frequency domain channel Band we can assume that the frequency response of channel is essentially identical, such that it is able to come based on subband feedback from frequency domain angle Quantized channel frequency plot responds, and each subband can feed back a phase place instruction, and the instruction of this phase place may be used for Reconstruct the frequency plot response coefficient of corresponding each subcarrier on this subbandUtilize channel based on subband reconstruct Frequency plot response coefficient may be used for generating the pre-equalization parameters used in distributed bandwidthCiting For, we can transform to frequency domain the channel impulse response of multipath channel, simply carrys out table with formula (20) Show:

Wherein, | | H (f) | | represents Frequency and Amplitude response (also referred to as amplitude-frequency response),Represent frequency plot response (also referred to as phase-frequency response),Represent corresponding Complex frequency phase response coefficient.According to the correlated bandwidth of channel Frequency domain is divided into N number of subband, and we are divided into k section frequency plot impactFor every band frequency f_k, It is considered thatIt is linear change, thus we can be with a phase place instruction quantifiedHave Limit feedback, indicates us to reconstruct according to this phase place and belongs to frequency range f_kThe frequency plot of interior each subcarrier becomes Change coefficientThis parameter is used for generating pre-equalization parameters W_pre。

Illustrating, when being configured to preequalization and opening (scheduling option E), baseband signal sends and receives divides It is not:

From the scheduling control signaling that network dispatcher sends, transmitter knows that its signal demand sent carries out preequalization And for doing preequalization just for phase place, use the structure of EB to send signal.

Transmitter machine, according to the instruction of network dispatcher, obtains the phase place instruction of subband from feedback channelSend out Penetrate the situation of the subband that machine comprises according to the bandwidth distributed, according to subband progressively reconfiguration frequency phase response coefficientAgain the frequency plot response coefficient on each subband is got up to obtain this institute according to subband location strings The frequency plot change system of all subcarriers in distribution bandwidthFurther, described feedback channel Namely can increase newly as a part of legacy upstream scheduling authorization signaling (uplink scheduling request) Phase place indicatesBit field；Can also newly set up downstream feedback channel for base station information feedback to Terminal.

Transmitter according toGenerate Pre-FDE parameter, asPreequalization is carried out to sending signal Carry out OQAM modulation again.OQAM signal r (l) of what receiver received passed through channel or with formula (17) Represent:

In conjunction with condition and the formula (17) of formula (7), if pre-equalization parameters and channel frequency on adjacent symbol The phase change coefficient convergence of the equivalent channel frequency response of rate response synthesis is identical, it is possible to reduce channel destroys The interference effect that OQAM real number field orthogonality is brought, i.e.Its Middle Δ_m,nIt it is a value varied less between adjacent-symbol.R (l) is demodulated by receiver, with on (m0, n0) It is output as y_m0,n0As a example by, as shown in formula (21):

Based onPremise, according to formula (6), we are permissible Know that the interference between adjacent-symbol can be significantly reduced by further post-equalization.We can formula (21) It is written as formula below (22) with further approximation:

Obviously, receiver knows that phase place has only been done preequalization by transmitter, thus 602 modules of receiver according to The equivalent channel frequency response estimatedTo expression-form y as shown in formula (22)_m,nCan be also according to post-equalization The data of former transmission, receiver can have employed the reference signal estimated for channel of pre-equalization process by reception Direct estimation obtains equivalent channel frequency responseThus generate post-equalization parameter Operate for post-equalization, i.e. with y_m,nBe multiplied, then carry out treating excess syndrome portion operation can be obtained by launch signal

When being configured to preequalization and closing (scheduling option F), scheduling option B of its process and embodiment one Process identical, the not repeated description at this.

Based on above-mentioned specific embodiment, this application provides a kind of signaling method based on bank of filters, bag Include:

Transmitter obtains preequalization configuration information, and described preequalization configuration information indicates whether to open preequalization；

When preequalization is opened in the instruction of preequalization configuration information, transmitter generates preequalization ginseng according to preequalization mode Number, and carry out preequalization operation according to pre-equalization parameters to sending signal, then carry out tune based on bank of filters System.

Corresponding to said method, this application provides a kind of transmitter based on bank of filters, including: control letter Make processing module, preequalization switch, information source, pre-equalization parameters generation module and send synthesis filter banks, its In:

Controlling signaling processing module, be used for obtaining preequalization configuration information, the instruction of described preequalization configuration information is No unlatching preequalization；

When the instruction of preequalization configuration information carries out preequalization, control signaling processing module control preequalization switch and connect Logical pre-equalization parameters generation module, the real number signal that information source produces by pre-equalization parameters generation module generated pre- After balance parameters carries out pre-equalization process, then it is modulated by sending synthesis filter banks；

When the instruction of preequalization configuration information does not carries out preequalization, control signaling processing module and control preequalization switch Connecting and send synthesis filter banks, the real number signal that information source produces directly is modulated by transmission synthesis filter banks.

Based on above-mentioned specific embodiment, present invention also provides a kind of signal acceptance method based on bank of filters, Including:

Receiver judges whether demodulation based on bank of filters according to the preequalization configuration information being indicated to transmitter Signal carries out post-equalization；Described preequalization configuration information indicates whether to open preequalization；

When preequalization is opened in the instruction of preequalization configuration information, and preequalization mode is for all to carry out pre-to amplitude and phase place During equilibrium, receiver does not carries out post-equalization to demodulated signal based on bank of filters；

When preequalization is opened in the instruction of preequalization configuration information, and when preequalization mode is only phase place to be carried out preequalization, The equivalence letter that demodulated signal based on bank of filters is synthesized by receiver according to pre-equalization parameters and channel frequency response Road frequency response carries out post-equalization；

When the instruction of preequalization configuration information does not carries out preequalization, receiver is to demodulated signal based on bank of filters Channel frequency response according to estimating carries out amplitude and phase place post-equalization.

Corresponding to said method, this application provides a kind of receiver based on bank of filters, including: receive and divide Analysis bank of filters, post-equalization switch, post-equalization parameter generation module and treating excess syndrome portion operation module；Wherein:

Described post-equalization switch judges whether to dock contracture analysis filter according to the preequalization configuration information being indicated to transmitter The demodulated signal of ripple device group carries out post-equalization；Described preequalization configuration information indicates whether to open preequalization；

When preequalization is opened in the instruction of preequalization configuration information, and preequalization mode is for all to carry out pre-to amplitude and phase place During equilibrium, post-equalization switch connection receives analysis filterbank and treating excess syndrome portion module；

When preequalization is opened in the instruction of preequalization configuration information, and when preequalization mode is only phase place to be carried out preequalization, Preequalization mode is sent to post-equalization parameter generation module by post-equalization switch, and connects reception analysis filterbank Generated balance parameters with post-equalization parameter generation module by post-equalization parameter generation module, and dock contracture analysis filtering After the demodulated signal of device group is carried out according to the equivalent channel frequency response that pre-equalization parameters and channel frequency response synthesize After equilibrium treatment, it is sent to treating excess syndrome portion module；

When the instruction of preequalization configuration information does not carries out preequalization, post-equalization switch connection receives analysis filterbank With post-equalization parameter generation module, post-equalization parameter generation module generate balance parameters, and dock contracture analysis filter After the demodulated signal of ripple device group carries out amplitude and the process of phase place post-equalization according to the channel frequency response estimated, send To treating excess syndrome portion module.

The foregoing is only the preferred embodiment of the application, not in order to limit the application, all in the application Spirit and principle within, any modification, equivalent substitution and improvement etc. done, should be included in the application protect Within the scope of protecting.

Claims (22)

1. a signaling method based on bank of filters, it is characterised in that including:

Transmitter obtains preequalization configuration information, and described preequalization configuration information indicates whether to open preequalization；

When preequalization is opened in the instruction of preequalization configuration information, transmitter generates preequalization ginseng according to preequalization mode Number, and carry out preequalization operation according to pre-equalization parameters to sending signal, then carry out tune based on bank of filters System.

Method the most according to claim 1, it is characterised in that:

Described preequalization configuration information is included in the scheduling control signaling that transmitter obtains.

Method the most according to claim 2, it is characterised in that:

The son that described transmitter also obtains when preequalization is opened from described scheduling control signaling and the time of closedown is used Frame type information, when sending the transmission of the number of symbol and first symbol in described subframe type information instruction subframe Carve.

Method the most according to claim 1, it is characterised in that:

Described preequalization mode is prespecified or is included in preequalization configuration information.

Method the most according to claim 4, it is characterised in that:

Described preequalization mode includes: amplitude and phase place are all carried out preequalization, or, only phase place is carried out pre- Equilibrium.

Method the most according to claim 5, it is characterised in that:

When preequalization mode is for all carrying out preequalization to amplitude and phase place, described generate pre-according to preequalization mode Balance parameters includes: channel condition information and preequalization mode according to obtaining generate pre-equalization parameters, described pre- The equivalent channel frequency response of balance parameters and channel frequency response synthesis is real number or imaginary part levels off to 0, and etc. The mould of effect channel frequency response levels off to 1.

Method the most according to claim 5, it is characterised in that:

When preequalization mode is for only carrying out preequalization to phase place, described generate preequalization ginseng according to preequalization mode Number includes: generate pre-equalization parameters according to the channel condition information obtained and preequalization mode, and described preequalization is joined The equivalent channel frequency response of number and channel frequency response synthesis is real number or imaginary part levels off to 0, and equivalent channel The mould of frequency response levels off to the mould of channel frequency response.

8. according to the method described in claim 6 or 7, it is characterised in that:

Described channel condition information is obtained by channel reciprocity.

Method the most according to claim 5, it is characterised in that:

When preequalization mode is for only carrying out preequalization to phase place, described generate preequalization ginseng according to preequalization mode Number includes: obtains phase place by the feedback of receiver and indicates, and the phase place instruction according to obtaining generates pre-equalization parameters.

Method the most according to claim 9, it is characterised in that:

Transmitter obtains the phase information of the channel frequency response quantified according to the instruction of described phase place, and according to described Phase information generates the frequency plot response coefficient in distributed bandwidth as Pre-FDE parameter.

11. methods according to claim 10, it is characterised in that:

The method also includes: frequency domain is divided into some subbands, and phase place instruction indicates based on subband, son Band number is more than or equal to 1, and transmitter generates in distributed bandwidth according to the corresponding relation of phase place instruction and subband Pre-FDE parameter.

12. methods according to claim 9, it is characterised in that:

Transmitter obtains, according to the instruction of described phase place, the phase information of channel impulse response quantified, and be transformed into right The frequency plot response coefficient answered is as Pre-FDE parameter.

13. methods according to claim 12, it is characterised in that:

The method also includes: the phase information of the channel impulse response of described quantization is the strongest by one in multipath channel The phase information of paths, or the phase place for the strongest X paths of energy in multipath channel is averaged and closes The phase information become, wherein X is more than 1.

14. methods according to claim 9, it is characterised in that:

The up phase place indication bit territory or special feedback channel transferred and increase in authorization signaling obtain described Feedback.

15. 1 kinds of signal acceptance methods based on bank of filters, it is characterised in that including:

Receiver judges whether demodulation based on bank of filters according to the preequalization configuration information being indicated to transmitter Signal carries out post-equalization；Described preequalization configuration information indicates whether to open preequalization；

When preequalization is opened in the instruction of preequalization configuration information, and preequalization mode is for all to carry out pre-to amplitude and phase place During equilibrium, receiver does not carries out post-equalization to demodulated signal based on bank of filters；

When preequalization is opened in the instruction of preequalization configuration information, and when preequalization mode is only phase place to be carried out preequalization, The equivalence letter that demodulated signal based on bank of filters is synthesized by receiver according to pre-equalization parameters and channel frequency response Road frequency response carries out post-equalization；

When the instruction of preequalization configuration information does not carries out preequalization, receiver is to demodulated signal based on bank of filters Channel frequency response according to estimating carries out amplitude and phase place post-equalization.

16. method according to claim 15, it is characterised in that:

The described equivalent channel frequency response synthesized according to pre-equalization parameters and channel frequency response carries out post-equalization bag Include: receiver have employed the reference signal direct estimation preequalization ginseng estimated for channel of preequalization by reception Number and the equivalent channel frequency response of channel frequency response synthesis, or receiver is by being provided without preequalization Reference signal first makees preequalization mode indirect Estimation pre-equalization parameters and the letter that channel is estimated to use further according to transmitter The equivalent channel frequency response of road frequency response synthesis, described equivalent channel frequency response is for based on wave filter Demodulated signal carry out post-equalization.

17. according to the method described in claim 15 or 16, it is characterised in that:

Described preequalization mode is prespecified or is included in preequalization configuration information.

18. 1 kinds of transmitters based on bank of filters, it is characterised in that including: control signaling processing module, Preequalization switch, information source, pre-equalization parameters generation module and transmission synthesis filter banks, wherein:

Controlling signaling processing module, be used for obtaining preequalization configuration information, the instruction of described preequalization configuration information is No unlatching preequalization；

When the instruction of preequalization configuration information carries out preequalization, control signaling processing module control preequalization switch and connect Logical pre-equalization parameters generation module, the real number signal that information source produces by pre-equalization parameters generation module generated pre- After balance parameters carries out pre-equalization process, then it is modulated by sending synthesis filter banks；

When the instruction of preequalization configuration information does not carries out preequalization, control signaling processing module and control preequalization switch Connecting and send synthesis filter banks, the real number signal that information source produces directly is modulated by transmission synthesis filter banks.

19. transmitters according to claim 18, it is characterised in that:

Described preequalization configuration information is obtained from scheduling control signaling by controlling signaling processing module.

20. according to the transmitter described in claim 18 or 19, it is characterised in that:

Pre-equalization parameters generation module generates described pre-equalization parameters according to preequalization mode；Described preequalization mode For prespecified or be included in described preequalization configuration information.

21. 1 kinds of receivers based on bank of filters, it is characterised in that including: reception analysis filterbank, Post-equalization switch, post-equalization parameter generation module and treating excess syndrome portion operation module；Wherein:

Described post-equalization switch judges whether to dock contracture analysis filter according to the preequalization configuration information being indicated to transmitter The demodulated signal of ripple device group carries out post-equalization；Described preequalization configuration information indicates whether to open preequalization；

When preequalization is opened in the instruction of preequalization configuration information, and preequalization mode is for all to carry out pre-to amplitude and phase place During equilibrium, post-equalization switch connection receives analysis filterbank and treating excess syndrome portion module；

When preequalization is opened in the instruction of preequalization configuration information, and when preequalization mode is only phase place to be carried out preequalization, Preequalization mode is sent to post-equalization parameter generation module by post-equalization switch, and connects reception analysis filterbank Generated balance parameters with post-equalization parameter generation module by post-equalization parameter generation module, and dock contracture analysis filtering After the demodulated signal of device group is carried out according to the equivalent channel frequency response that pre-equalization parameters and channel frequency response synthesize After equilibrium treatment, it is sent to treating excess syndrome portion module；

When the instruction of preequalization configuration information does not carries out preequalization, post-equalization switch connection receives analysis filterbank With post-equalization parameter generation module, post-equalization parameter generation module generate balance parameters, and dock contracture analysis filter After the demodulated signal of ripple device group carries out amplitude and the process of phase place post-equalization according to the channel frequency response estimated, send To treating excess syndrome portion module.

22. receivers according to claim 21, it is characterised in that:

Described preequalization mode is prespecified or is included in preequalization configuration information.