CN101091368B - Method and apparatus for transmitting/receiving a signal in an FFH-OFDM communication system - Google Patents

Abstract

Prevent invention apparatus includes: a Fast Frequency Hopping unit for allocating input data to a number of selected sub-carriers from among a plurality of sub-carriers and for performing fast frequency hopping in accordance with a fast frequency hopping pattern to generate FFH signals, wherein one or more pieces of data comprise the input data and each of the one or more pieces of data is allocated to one of the selected sub-carriers; a FFT unit for performing FFT on FFH signals; a controller for inserting null data into remaining sub-carriers, the remaining sub-carriers comprising sub-carriers other than the selected sub-carriers; a first Inverse FFT unit for performing IFFT on both the selected sub-carriers comprising the input data and the remaining sub-carriers comprising the inserted null data to generate first IFFT signals; and a transmitter for transmitting the first IFFT signals.

Description

Be used for method and apparatus in fast frequency-hopped orthogonal FDM communication system transmission/received signal

Technical field

The present invention relates to use fast frequency-hopped (Fast Frequency Hopping, FFH) communication system (FFH-OFDM communication system) of scheme and OFDM (OFDM) scheme.More particularly, the present invention relates to be used for by only using subclass in employed all available band of FFH-OFDM communication system to transmit/method and system of received signal.

Background technology

In the 4th generation (4G) communication system, research offers the service that the user has various service quality (QoS) and supports high transmission speed energetically.In addition, researched and developed the new communication system that to support high-speed service and in WLAN (wireless local area network) (LAN) and metropolitan area network (MAN) system, guarantee mobility and QoS energetically.

Broadband transmission network for the physical channel of supporting to be used for wireless MAN system is using OFDM scheme and OFDM (OFDMA) scheme widely.The OFDM/OFDMA scheme can be by using a plurality of carrier waves to realize high speed data transfer when transmitting physical channel signal, and can obtain frequency diversity gain by the different sub carrier frequency band that use is used for the frequency band of signal transmission.

Compare with the system that uses single sub-carrier, the ofdm communication system that uses multi-subcarrier has code-element period with the proportional prolongation of several subcarriers about the transmission speed of identical data.By using protection at interval, ofdm communication system can reduce inter symbol interference (ISI) in having the wireless channel of multipath fading.Be used to insert protection method at interval and comprise cyclic prefix method and cyclic suffix method.In cyclic prefix method, the sample of the predetermined quantity at the end of OFDM code element in the time domain is duplicated and is inserted in effective OFDM code element.In the cyclic suffix method, the sample of the predetermined quantity of the beginning (first) of OFDM code element in the time domain is duplicated and is inserted in effective OFDM code element.

Further, the channel response with each sub-carrier band is approximately smooth in this sub-carrier band.And, be set to sampling time T by the poor Δ f between the subcarrier _sInverse

Can during an OFDM code-element period, reduce inter-carrier interference (ICI).Orthogonal and between them, do not exist when disturbing when subcarrier.The receiver of ofdm communication system can come demodulating data by single tap equalizers that use has a relatively simple structure.Further, the complexity that ofdm communication system can minimization system, this is because ofdm communication system uses fast adverse Fourier transform (IFFT) scheme and fast Fourier transform (FFT) scheme to come a plurality of subcarriers of modulating/demodulating.The operation of the fast adverse Fourier transform unit (IFFT unit) of use IFFT scheme can be expressed as it defined matrix D of face formula (1) corresponding to frequency modulation(FM) in ofdm system _Q

${\left[{\underset{\&OverBar;}{D}}_Q\right]}_{n,m}=\frac{1}{\sqrt{Q}}\left[\exp \right\{\mathrm{<figure-callout\; id="2"\; label="j"\; filenames="H2005800450661E00051.png"\; state="\{\{state\}\}">j</figure-callout>}2\mathrm{\&pi;}(n-1)\&CenterDot;\frac{(m-1)}{Q}\left\}\right],m,n=1,...,Q..........\left(1\right)$

In formula (1), Q is illustrated in the quantity of employed all subcarriers in the ofdm communication system, and n represents sample index, and m represents sub-channel index. D _QExpression has the IFFT matrix of the size of Q * Q.Subchannel refers to the channel that comprises at least one subcarrier.Further, can will use the operation table of the fast Fourier transform (FFT) of FFT scheme to be shown as the defined IFFT matrix of formula (1) D _QE Mite conjugation (Hermitian) D _Q ^H

Simultaneously, when a plurality of subcarriers in the ofdm communication system comprise the subcarrier that experiences the deep fading, can be very low by successfully the decode probability of the data that subcarrier transmitted that experienced the deep fading of receiver.What proposed is used to overcome because the scheme of the decreased performance that the deep fading caused comprises hopping scheme and forward error correction (FEC) scheme.

Hopping scheme is that the frequency band that is used for the signal transmission changes according to predetermined frequency-hopping mode so that can obtain to disturb between the unit (Inter-Cell Interference, the scheme of average gain ICI).In other words, according to hopping scheme, when transmitting signal, the transmission band that is used for subcarrier is according to predetermined frequency-hopping mode cyclic variation.Therefore, hopping scheme can prevent that stop signal is sent to the signal user continuously by the subcarrier that experiences the deep fading who causes owing to the frequency-selective channel feature.Hop period is the integer multiple time corresponding interval of territory OFDM symbol time or OFDM code element.As a result of, under the situation of using hopping scheme, even when when predetermined OFDM symbol time transmits signal by the subcarrier that experiences the deep fading, can also transmit signal by the subcarrier that does not experience the deep fading at next OFDM symbol time, influenced continuously by the deep fading thereby place the signal transmission, thereby frequency diversity gain and interference can be averaged.

Further,, different subchannels is distributed to the user, and distribute to user's subchannel experience frequency hopping according to FH-OFDM scheme as the combination of hopping scheme and OFDM scheme.This makes can obtain average mark diversity gain and ICI average gain.

Yet in order to obtain enough gains by hopping scheme, traditional ofdm communication system must be carried out frequency hopping during many OFDM symbol time cycles.Further, it needs a large number of users, and must select suitable frequency-hopping mode according to channel.Even further, in the traditional ofdm communication system that uses hopping scheme, though the subcarrier by the experience deep fading is not sent to unique user continuously with signal, receiver also may be on each OFDM symbol time cycle demodulation by experience deep fading's the signal that subcarrier transmitted.

Therefore, need be used for by only using subclass to transmit/received signal, so that the improved method and apparatus of the signal that subcarrier transmitted that receiver can demodulation experience deep fading in employed all available band of FFH-OFDM communication system.

Summary of the invention

A scheme of the present invention is tackled the problems referred to above and/or shortcoming at least, and advantage described below at least is provided.Therefore, the aspect of example embodiment of the present invention is provided for being used in the FFH-OFDM communication system transmitting/method and apparatus of received signal.

Provide another order of example embodiment of the present invention and be used for by only using subclass in employed all available band of FFH-OFDM communication system to transmit/method and apparatus of received signal.

In order to realize this order ground, be provided for the equipment of the signal transmission in fast frequency-hopped-OFDM (FFH-OFDM) communication system, the FFH-OFDM communication system is divided into all available band a plurality of sub-bands and comprises a plurality of subchannels that each all comprises at least one sub-carrier band, described equipment comprises: fast frequency-hopped (FFH) unit, be used for giving several subcarriers of selecting from a plurality of subcarriers with the input data allocations, and be used for carrying out according to fast frequency-hopped pattern fast frequency-hopped to produce the FFH signal, wherein a slice or multi-disc data comprise the input data and each of this a slice or multi-disc data are distributed to a selected subcarrier; The fast Fourier transform (FFT) unit is used for the FFH signal is carried out FFT; Controller is used for empty data are inserted into all the other subcarriers, and these all the other subcarriers comprise the subcarrier except selected subcarrier; First fast adverse Fourier transform (IFFT) unit is used for comprising the selected subcarrier of importing data and comprising that all the other subcarriers of the empty data of being inserted carry out IFFT to produce an IFFT signal; And transmitter, be used to transmit an IFFT signal.

Another aspect according to example embodiment of the present invention, be provided for the method for the signal transmission in fast frequency-hopped-OFDM (FFH-OFDM) communication system, the FFH-OFDM communication system is divided into all available band a plurality of sub-bands and comprises a plurality of subchannels that each all comprises at least one sub-carrier band, the method comprising the steps of: will import data allocations and give several subcarriers of selecting from a plurality of subcarriers, and be used for carrying out fast frequency-hopped (FFH) to produce the FFH signal according to fast frequency-hopped pattern, wherein a slice or multi-disc data comprise the input data and each of this a slice or multi-disc data are distributed to a selected subcarrier; The FFH signal is carried out fast Fourier transform (FFT); Empty data are inserted in all the other subcarriers, and these all the other subcarriers comprise the subcarrier except selected subcarrier; To comprising the selected subcarrier of importing data and comprising that all the other subcarriers of the empty data of being inserted carry out IFFT to produce an IFFT signal; With transmit the signal that has experienced IFFT by invert fast fourier transformation (IFFT) unit through changing.

Another aspect according to example embodiment of the present invention, be provided for the equipment of the signal transmission in fast frequency-hopped-OFDM (FFH-OFDM) communication system, the FFH-OFDM communication system is divided into all available band a plurality of sub-bands and comprises a plurality of subchannels that each all comprises at least one sub-carrier band, described equipment comprises: the first fast Fourier transform (FFT) unit is used for received signal is carried out FFT; Controller, be used for from the signal of handling through FFT in a FFT unit, separating all the other subcarriers, these all the other subcarriers comprise the subcarrier except transfer equipment passes through its several selected subcarriers that transmit data, then empty data are inserted in all the other subcarriers; First equalizer is used for the output signal at the frequency domain balance controller; Fast adverse Fourier transform (IFFT) unit, be used for according to the applied fast frequency-hopped matrix of transfer equipment to first equalizer the balanced signal of crossing carry out IFFT; Second equalizer is used at the balanced signal of handling through IFFT of time domain; With the second fast Fourier transform (FFT) unit, be used for being carried out FFT by the balanced signal of crossing in time domain.

Another aspect according to example embodiment of the present invention, be provided for the method for the signal transmission in fast frequency-hopped-OFDM (FFH-OFDM) communication system, the FFH-OFDM communication system is divided into all available band a plurality of sub-bands and comprises a plurality of subchannels that each all comprises at least one sub-carrier band, and described method comprises step: (1) carries out fast Fourier transform (FFT) to received signal; (2) from the signal of a FFT unit, handling, separate all the other subcarriers through FFT, these all the other subcarriers comprise the subcarrier except transfer equipment passes through its several selected subcarriers that transmit data, then empty data are inserted in all the other subcarriers; (3) signal that equalization step (2) is produced in frequency domain; (4) according to fast frequency-hopped matrix in frequency domain the balanced signal of crossing carry out fast adverse Fourier transform (IFFT); (5) the balanced signal of handling through IFFT in time domain; (6) in time domain, being carried out fast Fourier transform (FFT) by the balanced signal of crossing.

Another aspect according to example embodiment of the present invention, be provided for the equipment of the signal transmission in fast frequency-hopped-OFDM (FFH-OFDM) communication system, the FFH-OFDM communication system is divided into all available band a plurality of sub-bands and comprises a plurality of subchannels that each all comprises at least one sub-carrier band, described equipment comprises: first controller, be used for empty data are inserted into all the other subcarriers, these all the other subcarriers are included in the subcarrier except several selected subcarriers of importing data by its carrying in all available subcarriers; Fast frequency-hopped (FFH) unit, be used for giving several selected subcarriers with the input data allocations, and be used for carrying out according to fast frequency-hopped pattern fast frequency-hopped to produce the FFH signal, wherein a slice or multi-disc data comprise the input data and each of this a slice or multi-disc data are distributed to a selected subcarrier; The fast Fourier transform (FFT) unit is used for FFH is carried out FFT; Second controller is used for empty data are inserted into all the other subcarriers; First fast adverse Fourier transform (IFFT) unit is used for comprising the selected subcarrier of importing data and comprising that all the other subcarriers of the empty data of being inserted carry out IFFT to produce an IFFT signal; And transmitter, be used to transmit an IFFT signal.

Another aspect according to example embodiment of the present invention, be provided for the method for the signal transmission in fast frequency-hopped-OFDM (FFH-OFDM) communication system, the FFH-OFDM communication system is divided into all available band a plurality of sub-bands and comprises a plurality of subchannels that each all comprises at least one sub-carrier band, described method comprises step: (1) is inserted into empty data in all the other subcarriers, and these all the other subcarriers are included in the subcarrier except several selected subcarriers of importing data by its carrying in all available subcarriers; (2) will import data allocations and give several selected subcarriers, carry out fast frequency-hoppedly to produce the FFH signal then according to fast frequency-hopped pattern, wherein a slice or multi-disc data comprise the input data and each of this a slice or multi-disc data are distributed to a selected subcarrier; (3) FFH is carried out fast Fourier transform (FFT); (4) empty data are inserted in all the other subcarriers; (5) to comprising the selected subcarrier of importing data and comprising that all the other subcarriers of the empty data of having inserted carry out fast adverse Fourier transform to produce an IFFT signal; (6) transmit an IFFT signal.

Another aspect according to example embodiment of the present invention, be provided for the equipment of the signal transmission in fast frequency-hopped-OFDM (FFH-OFDM) communication system, the FFH-OFDM communication system is divided into all available band a plurality of sub-bands and comprises a plurality of subchannels that each all comprises at least one sub-carrier band, described equipment comprises: the first fast Fourier transform (FFT) unit is used for received signal is carried out FFT; First controller, be used for from the signal that has passed through the FFT processing in a FFT unit, separating all the other subcarriers, these all the other subcarriers comprise the subcarrier except transfer equipment passes through its several selected subcarriers that transmit data, then empty data are inserted in all the other subcarriers; First equalizer is used for the output signal at the frequency domain balance controller; Fast adverse Fourier transform (IFFT) unit is used for according to the applied fast frequency-hopped matrix of transfer equipment the signal through first equalizer equalizes being carried out IFFT; Second equalizer is used at the balanced signal through IFFT of time domain; Second fast fourier transform (IFFT) unit is used for carrying out FFT at the balanced signal of crossing of time domain; With second controller, be used for from the signal of handling through FFT in the 2nd FFT unit, separating all the other subcarriers, then empty data are inserted in these all the other subcarriers.

Another aspect according to example embodiment of the present invention, be provided for the method for the signal transmission in fast frequency-hopped-OFDM (FFH-OFDM) communication system, the FFH-OFDM communication system is divided into all available band a plurality of sub-bands and comprises a plurality of subchannels that each all comprises at least one sub-carrier band, and described method comprises step: (1) carries out FFT to received signal; (2) from the signal that a FFT unit, has passed through the FFT processing, separate all the other subcarriers, these all the other subcarriers comprise the subcarrier except transfer equipment passes through its several selected subcarriers that transmit data, then empty data are inserted in all the other subcarriers; (3) weighing apparatus is controlled the signal that is produced in step (2); (4) according to fast frequency-hopped matrix the signal through equilibrium in frequency domain is carried out fast adverse Fourier transform (IFFT); (5) balanced signal in time domain through IFFT; (6) the balanced signal of crossing in time domain is carried out fast Fourier transform (FFT); (7) from the signal of the 2nd FFT unit, handling, separate all the other subcarriers, then empty data are inserted in these all the other subcarriers through FFT.

Another aspect according to example embodiment of the present invention, be provided for the equipment of the signal transmission in fast frequency-hopped-OFDM (FFH-OFDM) communication system, the FFH-OFDM communication system is divided into all available band a plurality of sub-bands and comprises a plurality of subchannels that each all comprises at least one sub-carrier band, described equipment comprises: first fast frequency-hopped-OFDM (FFH-OFDM) processing unit, be used to and carry out fast frequency-hopped and be ofdm signal by the signal that each user transmits conversion of signals, this FFH-OFDM processing unit comprises a plurality of processors, its each all will import data allocations and give several subcarriers of from a plurality of subcarriers, selecting and be used for carrying out fast frequency-hopped to produce the FFH-OFDM signal according to fast frequency-hopped pattern, wherein a slice or multi-disc data comprise the input data and give a selected subcarrier with this a slice or multi-disc data allocations; Multiplexer is used for multiplexing FFH-OFDM signal; Fast adverse Fourier transform (IFFT) unit is used for carrying out IFFT through multiplexing signal; And transmitter, be used to transmit signal through IFFT.

Disclose the following detailed description of example embodiment of the present invention in conjunction with the drawings, other purposes of the present invention, advantage and distinguishing feature will become apparent for those skilled in the art.

Description of drawings

The following detailed description of carrying out in conjunction with the drawings, above-mentioned and other purposes, characteristics and the advantage of specific implementations of the present invention will be more obvious for those skilled in the art, wherein.

Fig. 1 is the block diagram of structure of transmitter of FFH-OFDM communication system that the function of execution first example embodiment according to the present invention is shown;

Fig. 2 is the block diagram of structure of receiver of FFH-OFDM communication system that the function of execution first example embodiment according to the present invention is shown;

Fig. 3 is the block diagram of structure of transmitter of FFH-OFDM communication system that the function of execution second example embodiment according to the present invention is shown;

Fig. 4 is the block diagram of structure of receiver of FFH-OFDM communication system that the function of execution second example embodiment according to the present invention is shown;

Fig. 5 is the block diagram of structure of transmitter of FFH-OFDM communication system that the function of execution the 3rd example embodiment according to the present invention is shown;

Fig. 6 is the block diagram of structure of receiver of FFH-OFDM communication system that the function of execution the 3rd example embodiment according to the present invention is shown; With

Fig. 7 is the block diagram that the structure of the transmitter in the fast frequency-hopped ofdm communication system is shown, and it carries out the function according to four embodiment of the invention.

Should be appreciated that in whole accompanying drawings, identical Reference numeral is represented components identical, characteristics and structure.

Embodiment

The things that is limited in this manual such as detailed construction and part provides that to help complete understanding of the present invention, and only is exemplary.Therefore, it should be appreciated by those skilled in the art, under the situation that does not depart from scope and spirit of the present invention, can carry out various modifications and variations execution mode as described herein.And, for clarity and brevity, omitted description to known function and structure.

Example embodiment of the present invention comprises method and apparatus, be used for by only using subclass, transmission/received signal when execution is fast frequency-hopped in employed all available band of communication system (FFH-OFDM communication system) of using fast frequency-hopped (FFH) scheme and OFDM (OFDM) scheme.The FFH hopping scheme is in the cycle of OFDM sample, perhaps carries out fast frequency-hopped scheme in the integer multiple of the OFDM sample that is alternative in OFDM sample cycle.Therefore, according to the FFH hopping scheme, in frequency domain, be spread to a plurality of subcarriers and transmit an OFDM code element afterwards.

The structure of carrying out fast frequency-hopped transmitter by use all available band in the FFH-OFDM communication system is described with reference to Fig. 1.

Fig. 1 is the block diagram of structure of transmitter that the FFH-OFDM communication system of first example embodiment according to the present invention is shown.

With reference to Fig. 1, transmitter comprises serial-to-parallel (S/P) transducer 111, fast frequency-hopped (FFH) unit 120, parallel-to-serial (P/S) transducer 131, protection be inserter 133, digital to analogy (D/A) transducer 135 and radio frequency (RF) processor 137 at interval.FFH unit 120 comprises fast adverse Fourier transform (IFFT) unit 121 and linear processor 123.

When having the input data that will be transmitted, will import data and be input to S/P transducer 111.These data comprise actual user data or the reference data such as pilot tone.S/P transducer 111 is converted to parallel signal with input data bitstream unit, and will output to IFFT unit 121 through the parallel data of conversion.As used herein such, will be called from the parallel signal of S/P transducer 111 outputs d, it is defined by following formula (2).

d＝[d ₁...d _Q] ^T........(2)

In formula (2), T represents the transposition computing, and Q is illustrated in the sum of employed available subcarrier in the FFH-OFDM communication system.121 pairs of the signals in IFFT unit from 111 outputs of S/P transducer dCarry out Q point IFFT, and will output to linear processor 123 through the signal that IFFT handles.123 pairs of signals from IFFT unit 121 of linear processor are carried out linear process, then treated signal are outputed to P/S transducer 131.

Below, will the operation of IFFT unit 121 and linear processor 123 be described in further detail.

When subcarrier being carried out when fast frequency-hopped, for in the transmitter of all available band of use shown in Fig. 1, transmitting data with the multiple time corresponding of OFDM sample time cycle or OFDM sample time cycle at interval, can be by having the new matrix of Q * Q size G _QRepresent frequency modulation(FM).In other words, be used to carry out warbled matrix according to (3) defined fast frequency-hopped scheme as the following formula (below, be called " fast frequency-hopped matrix "), with described in description of the Prior Art by the defined IFFT matrix of formula (1) D _QDifferent.As mentioned above, IFFT matrix D _QIt is the corresponding matrix of frequency modulation(FM) operation with the IFFT unit.

${\left[{\underset{\&OverBar;}{G}}_Q\right]}_{n,m}=\frac{1}{\sqrt{Q}}\left[\exp \right\{\mathrm{<figure-callout\; id="2"\; label="j"\; filenames="H2005800450661E00051.png"\; state="\{\{state\}\}">j</figure-callout>}2\mathrm{\&pi;}(n-1)\&CenterDot;\frac{{\left[\mathrm{\&Phi;}\right]}_{n,m}}{Q}\left\}\right],m,n=1,...,Q.........\left(3\right)$

In formula (3), n represents sample index, and m represents sub-channel index.Further, [Φ] _{N, m}Be illustrated in the subcarrier that transmits the data of m subchannel on the n sample.Therefore, [Φ] _{N, m}Determine the fast frequency-hopped pattern when execution is fast frequency-hopped.Further, example embodiment of the present invention is used fast frequency-hopped pattern, and its subcarrier that can prevent to be used for transfer of data is overlapping on predetermined sample, and is represented to be used for the fast frequency-hopped matrix of all fast frequency-hopped patterns by following formula (4) G _Q

G _Q＝ Δ _Q D _Q， Δ _Q＝ G _Q D _Q ^H...........(4)

In formula (4), pre-determine fast frequency-hopped matrix according to fast frequency-hopped pattern G _QAnd matrix Δ _QThe value of element, and matrix Δ _QSize with Q * Q.

Suppose the f of fast frequency-hopped pattern _nBe the subcarrier that on the n sample, transmits the data of first subchannel, when the matrix of formula (5) the fast frequency-hopped mode producing formula of defined circulation (4) below using Δ _QThe time, it always becomes diagonal matrix.

[Φ] _n，m＝mod(f _n+m-1，Q)，m＝1，...，Q...........(5)

In this case, with fast frequency-hopped matrix G _QBe expressed as by with common IFFT matrix D _QMultiply by matrix Δ _QWhat obtained is long-pending.Therefore, can and the IFFT matrix can be multiply by matrix by the IFFT unit Δ _QLinear processor implement to be used to carry out fast frequency-hopped equipment.Such as described herein, example embodiment of the present invention is based on such hypothesis: fast frequency-hopped pattern is the example of the fast frequency-hopped pattern of circulation.Therefore, also can be with matrix Δ _QBe defined as diagonal matrix.Much less, this also sets up under the situation of the type of revising fast frequency-hopped pattern.

As used herein such, will be called from the signal of linear processor 123 outputs bCome definition signal by following formula (6) b

b＝ G _Q d＝ Δ _Q D _Q d.............(6)

P/S transducer 131 is from linear processor 123 received signals b, with signal bBe converted to serial signal, will output to protection inserter 133 at interval through the serial signal of conversion then.Protection inserter 133 at interval will protect the interval to be inserted into from the signal that 131 outputs of P/S transducer come, and then this signal be outputed to D/A converter 135.Protection is inserted at interval to remove OFDM code element and the interference between the current OFDM code element that will be transmitted on the current OFDM symbol time before being transmitted on the OFDM symbol time before in ofdm communication system.Further, use cyclic prefix method or cyclic suffix method to insert protection at interval.In cyclic prefix method, the end sample of the predetermined quantity of OFDM code element in the time domain is duplicated and is inserted in effective OFDM code element.In the cyclic suffix method, the beginning sample of the predetermined quantity of OFDM code element in the time domain is duplicated and is inserted in effective OFDM code element.

The conversion of signals that D/A converter 135 will come from inserter 133 outputs of protection interval is an analog signal, will output to RF processor 137 through the signal of conversion then.RF processor 137 comprises the element such as filter and unit, front and back.The signal of 137 pairs of outputs from D/A converter 135 of RF processor carries out RF to be handled, and treated signal is transmitted by actual channel.

Below, with reference to the structure of Fig. 2 description according to the receiver of the FFH-OFDM communication system of first embodiment of the invention execution function.

Fig. 2 is the block diagram of the structure of the receiver of the FFH-OFDM communication system of first example embodiment execution function according to the present invention.

Receiver shown in Figure 2 comprises RF processor 211, D/A converter 213, channel estimator 215, protection interval removal 217, S/P transducer 219, FFT unit 221, equalizer 223, IFFT unit 225, equalizer 227, FFT unit 229 and parallel-to-serial (P/S) transducer 231.

The signal that sends from the transmitter of FFH-OFDM communication system shown in Figure 1 obtains (pick up) noise such as additive white noise (AWGN) by multipath channel the time, the signal that has the noise that is added then is input to RF processor 211 by antenna.As used herein such, the channel matrix of representing the channel response of multipath channel is expressed as H _t, and the psophometer that is added is shown n _t, wherein t means measured channel response and noise in time domain.Being converted to intermediate frequency (IF) signal under the signal that RF processor 211 will receive by antenna, is baseband frequency signal then, will output to D/A converter 213 through the signal of conversion afterwards.The analog signal conversion that D/A converter 213 will come from 211 outputs of RF processor is a digital signal, will output to channel estimator 215 and protection interval removal 217 through the digital signal of conversion then.

215 pairs of signals from D/A converter 213 of channel estimator are carried out channel estimating, and the result of channel estimating is outputed to equalizer 223.The channel estimating operation of channel estimator 215 does not have direct relation with example embodiment of the present invention, therefore will not be described in detail.Protection interval removal 217 is removed protection at interval from the signal of D/A converter 213 inputs, and the signal that is produced is outputed to S/P transducer 219.The conversion of signals of S/P transducer 219 interval removal of self-shield in the future 217 is a parallel signal, and will output to FFT unit 221 through the parallel signal of conversion.As used herein such, will be called from the signal of S/P transducer 219 outputs eSignal eBe by the defined time-domain signal of following formula (7).

e＝ H _t B+ n _t......................(7)

221 pairs of the signals in FFT unit from S/P transducer 219 eCarry out Q point FFT, then this signal is outputed to equalizer 223.As used herein such, will be called by 221 signals of exporting from the FFT unit _e fSignal e _fBe by the defined frequency-region signal of following formula (8).

${\underset{\&OverBar;}{e}}_f={\underset{\&OverBar;}{D}}_Q^H\underset{\&OverBar;}{e}={\underset{\&OverBar;}{D}}_Q^H{\underset{\&OverBar;}{H}}_t\underset{\&OverBar;}{b}+{\underset{\&OverBar;}{n}}_f...\left(8\right)$

In formula (8), D _Q ^HExpression IFFT matrix D _QThe E Mite conjugation.

In order to compensate the distorted signals of multipath channel, need to carry out equalization operation.Particularly, in the FFH-OFDM communication system, need in time domain and frequency domain, all carry out balanced.Therefore, the FFH-OFDM communication system needs two kinds of equalizers, comprises time-domain equalizer that is used for balanced time-domain signal and the frequency-domain equalizer that is used for balanced frequency-region signal.

Therefore, equalizer 223 carries out equilibrium to the signal from FFT unit 221 in frequency domain, then they is outputed to IFFT unit 225.The channel response of equalizer 223 compensation frequency domains.Because the FFH-OFDM communication system is used the protection blank signal, so channel response in time domain and the channel response in frequency domain are in singular value decomposition (the Singular Value Decomposition) relation, it is by following formula (9) definition.

${\underset{\&OverBar;}{H}}_f={\underset{\&OverBar;}{D}}_Q^H{\underset{\&OverBar;}{H}}_t{\underset{\&OverBar;}{D}}_Q...\left(9\right)$

In formula (9), H _fBe illustrated in the channel matrix of compensate for channel response in the frequency domain.Because channel matrix H _fBe diagonal matrix, so it can be implemented by single tap equalizers.Be used to carry out equalizer 223 execution of frequency domain equalization and the substantially the same operation of operation of the equalizer execution of typical ofdm communication system.Equalizer 223 is according to the channel compensation scheme, has to comprise that zero forces (Zero Forcing, ZF) structure of equalizer, Minimum Mean Square Error (MMSE) equalizer and matched filter.

Further, the 225 pairs of signals from equalizer 223 in IFFT unit are carried out Q point IFFT, then this signal are outputed to equalizer 227.The operation of IFFT unit 225 is identical with the operation of the IFFT unit 121 of transmitter shown in Figure 1, so omit detailed description here.

The signal that equalizer 227 receives in IFFT unit 225, balanced this signal outputs to FFT unit 229 with this signal then in time domain.As used herein like that, the equilibrium of the signal in the time domain is expressed as M _tCan be by the equilibrium in following formula (10) the definition time domain M _t

M _t＝ Δ _Q ^H..............................(10)

As formula (10) is represented, can pass through the defined matrix of formula (4) Δ _QThe E Mite conjugation Δ _Q ^HRepresent the equilibrium in the time domain M _tTherefore, matrix Δ _Q ^HIt also is diagonal matrix.

The signal that FFT unit 229 receives from equalizer 227 to this information and executing Q point FFT, outputs to P/S transducer 231 with this signal then.The operation of FFT unit 229 is identical with the operation of FFT unit 221, so omit detailed description here.Can pass through estimated vector by the defined input data bitstream of following formula (11) unit

The signal of representing 229 outputs from the FFT unit.

$\underset{\&OverBar;}{\overset{^}{d}}={\underset{\&OverBar;}{D}}_Q^H{\underset{\&OverBar;}{M}}_t{\underset{\&OverBar;}{D}}_Q{\underset{\&OverBar;}{M}}_f{\underset{\&OverBar;}{e}}_f...\left(11\right)$

For example, when the ZF equalizer of equalizer 223 uses according to the channel response of classifying as the subcarrier of the defined frequency-region signal of formula (8), and equalizer 227 is carried out as the defined equilibrium of formula (10) M _tThe time, can be with the defined input data bitstream of formula (11) unit estimated vector

Expand into as the following formula shown in (12).

$\underset{\&OverBar;}{\overset{^}{d}}={\underset{\&OverBar;}{D}}_Q^H{{\underset{\&OverBar;}{\mathrm{\&Delta;}}}_Q}^H{\underset{\&OverBar;}{D}}_Q{{\underset{\&OverBar;}{H}}_f}^{-1}({\underset{\&OverBar;}{D}}_Q^H\underset{\&OverBar;}{e}+{\underset{\&OverBar;}{n}}_f)$

$={\underset{\&OverBar;}{D}}_Q^H{{\underset{\&OverBar;}{\mathrm{\&Delta;}}}_Q}^H{\underset{\&OverBar;}{D}}_Q{{\underset{\&OverBar;}{H}}_f}^{-1}{\underset{\&OverBar;}{D}}_Q^H{\underset{\&OverBar;}{H}}_t{\underset{\&OverBar;}{\mathrm{\&Delta;}}}_Q{\underset{\&OverBar;}{D}}_{Q}d+{\underset{\&OverBar;}{D}}_Q^H{{\underset{\&OverBar;}{\mathrm{\&Delta;}}}_Q}^H{\underset{\&OverBar;}{D}}_Q{{\underset{\&OverBar;}{H}}_f}^{-1}{\underset{\&OverBar;}{n}}_f.....\left(12\right)$

$=\underset{\&OverBar;}{d}+{\underset{\&OverBar;}{D}}_Q^H{{\underset{\&OverBar;}{\mathrm{\&Delta;}}}_Q}^H{\underset{\&OverBar;}{D}}_Q{{\underset{\&OverBar;}{H}}_f}^{-1}{\underset{\&OverBar;}{n}}_f$

P/S transducer 231 will be serial signal from the conversion of signals of FFT unit 229, will comprise this serial signal output of final input symbols then.With Fig. 1 and Fig. 2 relatively, described in the above according to the present invention first example embodiment, carry out fast frequency-hopped FFH-OFDM communication system by using all available band.Below, with describe according to the present invention the first and the 3rd example embodiment, carry out fast frequency-hopped FFH-OFDM communication system by the subclass of using all available band.

When the frequency band corresponding with specific subcarrier is not used in the signal transmission but only is used as the protection frequency band; perhaps when only the subset allocation corresponding with specific subcarrier of all available band during to each user of signal transmission, being reflected fast frequency-hopped the present invention second and the 3rd execution mode by the subclass of using all available band.The FFH-OFDM communication system can improve systematic function significantly by using dynamic channel allocation (DCA) scheme, and this DCA scheme is according to the channel status of the user on each time point allocated sub-channels dynamically.Therefore, the of the present invention second and the 3rd execution mode proposes to be used for by using the fast frequency-hopped scheme of subclass execution of all available band.As described in the present invention second and the 3rd example embodiment, the quantity of supposing employed all available band in the FFH-OFDM communication system is Q, and the number of subcarriers corresponding with partial-band is M (M≤Q).

Below, with the difference of briefly describing between the present invention second and the 3rd example embodiment.

At first, in the present invention's second example embodiment, only carry out fast frequency-hoppedly, and empty data (for example 0) are inserted in other subcarriers, just (Q-M) individual subcarrier at M subcarrier.In this embodiment, can be all available band by the hypothesis frequency band corresponding with M subcarrier, implement example embodiment of the present invention in the mode identical with the mode of first example embodiment.

Below, in the present invention's the 3rd example embodiment, by at comprising M subcarrier and (Q-M) all available Q subcarriers execution of individual subcarrier are fast frequency-hopped.Only empty data (for example 0) are inserted in (Q-M) individual subcarrier and are not inserted in this M subcarrier.Specifically, in the present invention's the 3rd example embodiment, empty data are inserted in (Q-M) individual subcarrier in advance.Carry out fast frequency-hopped at Q subcarrier.Afterwards, once more empty data are inserted in (Q-M) individual subcarrier.At last, transmit subcarrier.In order to produce the transmission signals identical with the transmission signals of second execution mode, the 3rd execution mode must satisfy two conditions that will be discussed in more detail below.

The structure of transmitter of FFH-OFDM communication system of the function of execution second example embodiment according to the present invention is described with reference to Fig. 3.

Fig. 3 is the block diagram of structure of transmitter of FFH-OFDM communication system that the function of execution second example embodiment according to the present invention is shown.

With reference to Fig. 3, this transmitter comprises serial-to-parallel (S/P) transducer 311, FFH unit 320, fast Fourier transform (FFT) unit 331, controller 333, IFFT unit 335, P/S transducer 337, protection inserter 339, D/A converter 341 and RF processor 343 at interval.FFH unit 320 comprises IFFT unit 321 and linear processor 323.

At first, when having the input data that will be transmitted, will import data and be input to S/P transducer 311.These data comprise actual user data or the reference data such as pilot tone.Since in second example embodiment of the present invention, only fast frequency-hopped at M subcarrier execution, so S/P transducer 311 is converted to M paralleled code element with input data bitstream unit, and will output to IFFT unit 321 through the paralleled code element of conversion.As used herein like that, will be called by following formula (13) expression from the parallel signal of S/P transducer 311 outputs d _M

d _M＝[d ₁...d _M] ^T...............................(13)

321 pairs of the parallel signals in IFFT unit from 311 outputs of S/P transducer d _MCarry out M point IFFT, and will output to linear processor 323 through the signal that IFFT handles.Linear processor 323 is to carry out linear process from the signal of IFFT unit 321, then treated signal is outputed to FFT unit 331.

Below, will the operation of IFFT unit 321 and linear processor 323 be described in further detail.

Transmitter shown in Fig. 3 only uses M subcarrier rather than all available band.Therefore, when carrying out fast frequency-hopped with in only using the transmitter shown in Figure 3 of M subcarrier rather than all available band for subcarrier, when transmitting data at interval with the multiple time corresponding of OFDM sample time cycle or OFDM sample time cycle, with first example embodiment according to the present invention at fast frequency-hopped matrix G _QThe identical mode of mode produce fast frequency-hopped matrix.Yet, in the present invention's second example embodiment, the new matrix and first execution mode that produces G _QDifferent G _MCan pass through the new fast frequency-hopped matrix that produces of formula (14) definition G _M

${\left[{\underset{\&OverBar;}{G}}_M\right]}_{n,m}=\frac{1}{\sqrt{M}}\left[\exp \right\{\mathrm{<figure-callout\; id="2"\; label="j"\; filenames="H2005800450661E00051.png"\; state="\{\{state\}\}">j</figure-callout>}2\mathrm{\&pi;}(n-1)\&CenterDot;\frac{{\left[\mathrm{\&Phi;}\right]}_{n,m}}{M}\left\}\right],m,n=1,...,M.....\left(14\right)$

In formula (14), fast frequency-hopped matrix G _MSize with M * M.Further, example embodiment of the present invention is based on fast frequency-hopped pattern, and it is overlapping at the predetermined sample place that this pattern can prevent to be used for the subcarrier of transfer of data, and represents fast frequency-hopped matrix by following formula (15) at all fast frequency-hopped patterns G _M

G _M＝ Δ _M D _M， Δ _M＝ G _M D _M ^H.....................(15)

In formula (15), pre-determine fast frequency-hopped matrix according to fast frequency-hopped pattern G _MAnd matrix Δ _MThe value of element.

Suppose the f of fast frequency-hopped pattern _nBe the subcarrier that on the n sample, transmits the data of first subchannel, when producing the matrix that defines by formula (15) by using by the fast frequency-hopped pattern of the defined circulation of following formula (16) Δ _MThe time, it becomes diagonal matrix.

[Φ] _n，m＝mod(f _n+m-1，M)，m＝1，...，M.............(16)

In this case, with fast frequency-hopped matrix G _MBe expressed as by with common IFFT matrix D _MMultiply by matrix Δ _MAnd acquisition is long-pending.Therefore, can and the IFFT matrix can be multiply by matrix by the IFFT unit Δ _MLinear processor implement to be used to carry out fast frequency-hopped equipment.As described here, example embodiment of the present invention is based on such hypothesis: fast frequency-hopped pattern is the example of the fast frequency-hopped pattern of circulation.Therefore, can also be with matrix Δ _MBe defined as diagonal matrix.Much less, this also sets up the type that can revise fast frequency-hopped pattern.

As used herein such, will be called from the signal of linear processor 323 outputs b _MCan define this signal by following formula (17) b _M

b _M＝ G _M d _M＝ Δ _M D _M d _M...................(17)

331 pairs of the signals in FFT unit from linear processor 323 b _MCarry out M point FFT, then this signal is outputed to controller 333.Controller 333 receives the signal from FFT unit 331, and empty data (for example 0) are inserted into the sub-carrier band except M sub-carrier band, then this signal is outputed to IFFT unit 335.In this case, controller 333 is as certain zero insertion device (0 inserter).Can be by the zero insertion operation of following formula (18) expression controller 333.

$Z_{Q,M}=\left(\begin{array}{c}{I}_M\\ 0_{Q-M,M}\end{array}\right)...\left(18\right)$

ZQ, M are the matrixes of operation that is used for the controller 333 of presentation graphs 3.As above said, among the output signal of controller 333, the data that transmitted by M subcarrier are to have experienced a fast frequency-hopped M subcarrier data, and the empty data that transmitted by (Q-M) individual subcarrier are never to live through fast frequency-hopped data.

IFFT unit 335 receives the signal of self-controller 333, and this signal is carried out Q point IFFT, then this signal is outputed to P/S transducer 337.As used herein, will be called from the signal of IFFT unit 335 b _Q ⁽¹⁾Can pass through following formula (19) definition signal b _Q ⁽¹⁾

${\underset{\&OverBar;}{b}}_Q^{\left(1\right)}={\underset{\&OverBar;}{D}}_Q{\underset{\&OverBar;}{Z}}_{Q,M}{\underset{\&OverBar;}{D}}_M^H{\underset{\&OverBar;}{\mathrm{\&Delta;}}}_M{\underset{\&OverBar;}{D}}_M{\underset{\&OverBar;}{d}}_M...\left(19\right)$

P/S transducer 337, protection inserter 339, D/A converter 341 and RF processor 343 are at interval carried out with the P/S transducer 131 shown in Fig. 1, are protected the operation identical operations of inserter 133, D/A converter 135 and RF processor 137 at interval, therefore will omit the detailed description to them here.

The structure of carrying out the transmitter of the FFH-OFDM communication system of the function of second example embodiment according to the present invention has been described in the above about Fig. 3.Below, the structure of receiver of FFH-OFDM communication system of the function of execution second example embodiment according to the present invention is described with reference to Fig. 4.

Fig. 4 is the block diagram of structure of receiver of FFH-OFDM communication system that the function of execution second example embodiment according to the present invention is shown.

Receiver shown in Fig. 4 comprises RF processor 411, D/A converter 413, channel estimator 415, protection interval removal 417, S/P transducer 419, FFT unit 421, controller 423, equalizer 425, IFFT unit 427, equalizer 429, FFT unit 431 and P/S transducer 433.Therefore the operation identical operations of RF processor 211, D/A converter 213, protection interval removal 217 and the S/P transducer 219 of the RF processor 411 of Fig. 4, D/A converter 413, protection interval removal 417 and 419 execution of S/P transducer and Fig. 2 will omit the detailed description to them here.

As used herein such, will be from the signal indication of S/P transducer 419 outputs e _QCan be by following formula (20) expression signal e _Q

e _Q＝ H _t b _Q ⁽¹⁾+ n _t......................(20)

421 pairs of the signals in FFT unit from S/P transducer 419 e _QCarry out Q point FFT, then this signal is outputed to controller 423.As used herein such, will be called by 412 signals of exporting from the FFT unit e _{F, Q}Signal e _{F, Q}It can be frequency-region signal and by following formula (21) definition.

${\underset{\&OverBar;}{e}}_{f,Q}={\underset{\&OverBar;}{D}}_Q^H{\underset{\&OverBar;}{e}}_Q={\underset{\&OverBar;}{D}}_Q^H{\underset{\&OverBar;}{H}}_t{\underset{\&OverBar;}{b}}_Q+{\underset{\&OverBar;}{D}}_Q^H{\underset{\&OverBar;}{n}}_f...\left(21\right)$

Simultaneously, owing to from Q subcarrier of FFT unit 421 outputs, having only M sub-carrier signal to comprise data, so the signal of controller 423 421 outputs from the FFT unit e _{F, Q}In eliminate (Q-M) the individual sub-carrier signal comprise sky data (for example 0), and only M subcarrier outputed to equalizer 425.In this case, controller 423 is as certain zero remover (0 remover).Controller 423 remove that controller 33 by Fig. 3 inserted 0.

Can remove operation by zero of following formula (22) expression controller 423.

Z _M，Q＝(I _M0 _M，Q-M)........................(22)

Simultaneously, in order to compensate the distorted signals of multipath channel, need to carry out equalization operation.In the FFH-OFDM communication system, need in time domain and frequency domain, all carry out balanced.Therefore, the FFH-OFDM communication system needs two kinds of equalizers, comprises time-domain equalizer that is used for balanced time-domain signal and the frequency-domain equalizer that is used for balanced frequency-region signal.

Therefore, equalizer 425 equilibrium in frequency domain comes the signal of self-controller 423, then they is outputed to IFFT unit 427.The channel response of equalizer 425 compensation frequency domains.

Further, the 427 pairs of signals from equalizer 425 in IFFT unit are carried out M point IFFT, then this signal are outputed to equalizer 429.The operation of IFFT unit 427 is identical with the operation of the IFFT unit 321 of transmitter shown in Figure 3, therefore omits detailed description here.

The signal that equalizer 429 receives from IFFT unit 427 carries out equilibrium to this signal in time domain, then this signal is outputed to FFT unit 431.As used herein like that, the equilibrium of the signal in the time domain is expressed as M _{T, M}By the equilibrium in following formula (23) the definition time domain M _{T, M}

M _t，M＝ Δ _M ^H..............................(23)

Represented as formula (23), can pass through the defined matrix of formula (15) Δ _MThe E Mite conjugation Δ _M ^HRepresent the equilibrium in the time domain M _{T, M}Therefore, matrix Δ _M ^HIt also is diagonal matrix.

The signal that FFT unit 431 receives from equalizer 429 is carried out M point FFT to this signal, then this signal is outputed to P/S transducer 433.The operation of FFT unit 431 is identical with the operation of the FFT unit 331 of Fig. 3, therefore omits detailed description here.Can be by input data bitstream unit estimated vector by following formula (24) definition

The signal of representing 431 outputs from the FFT unit.Simultaneously, in formula (24), e _{F, Q}Expression 431 outputs and be input to the signal of controller 423 from the FFT unit, and D _M ^H, M _TM, D _M, M _{F, M}With Z _{M, Q}The matrix of FFT unit 431, equalizer 429, IFFT unit 427, equalizer 425 and controller 423 is represented in expression respectively.

${\underset{\&OverBar;}{\overset{^}{d}}}_M={\underset{\&OverBar;}{D}}_M^H{\underset{\&OverBar;}{M}}_{t,M}{\underset{\&OverBar;}{D}}_M{\underset{\&OverBar;}{M}}_{f,M}{\underset{\&OverBar;}{Z}}_{M,Q}{\underset{\&OverBar;}{e}}_{f,Q}...\left(24\right)$

P/S transducer 433 will be serial signal from the conversion of signals of FFT unit 431, will comprise this serial signal output of last input signal then.The structure of carrying out the receiver of the FFH-OFDM communication system of the function of second example embodiment according to the present invention has been described above about Fig. 4.Below, the structure of transmitter of FFH-OFDM communication system of the function of execution the 3rd example embodiment according to the present invention is described with reference to Fig. 5.

Fig. 5 is the block diagram of structure of transmitter of FFH-OFDM communication system that the function of execution the 3rd example embodiment according to the present invention is shown.

With reference to Fig. 5, this transmitter comprises serial-to-parallel (S/P) transducer 511, controller 513, FFH unit 520, FFT unit 531, controller 533, IFFT unit 535, P/S transducer 537, protection inserter 539, D/A converter 541 and RF processor 543 at interval.FFH unit 520 comprises IFFT unit 521 and linear processor 523.

When having the data that will be transmitted, will import data and output to S/P transducer 511.These data comprise actual user data or the reference data such as pilot tone.Since in the 3rd example embodiment of the present invention, only fast frequency-hopped at M subcarrier execution, so S/P transducer 511 is converted to M paralleled code element with input data bitstream unit, and will output to controller 513 through the paralleled code element of conversion.Controller 513 receives the signal from S/P transducer 511, and empty data (for example 0) are inserted into this (Q-M) the individual sub-carrier band except this M sub-carrier band, then this signal is outputed to IFFT unit 521.In this case, controller 513 is as certain zero insertion device (0 inserter).

The parallel signal that 513 outputs of the 521 pairs of slave controllers in IFFT unit come is carried out Q point IFFT, and will output to linear processor 523 through the signal that IFFT handles.Linear processor 523 is to carry out linear process from the signal of IFFT unit 521, then treated signal is outputed to FFT unit 531.The operation of IFFT unit 521 and linear processor 523 is identical with the operation of the IFFT unit 121 of Fig. 1 and linear processor 123, therefore will omit detailed description here.

The 531 pairs of signals from FFH unit 520 in FFT unit are carried out Q point FFT, then this signal are outputed to controller 533.As used herein such, will be called by 531 signals of exporting from the FFT unit b _{Q, all} b _{Q, all}It is the signal that when spread spectrum in time domain comprises M sub-carrier signal of real data and comprise (Q-M) individual sub-carrier signals of sky data, obtains.

The signal that controller 533 receives from FFT unit 531 b _{Q, all}, empty data (for example 0) are inserted in (Q-M) individual sub-carrier band, then this signal is input to IFFT unit 535.In this case, controller 533 is used for certain zero insertion device (0 inserter).Can be by the zero insertion operation of following formula (25) expression controller 533.

$Z_Q=Z_{Q,M}{Z}_{Q,M}^T=\left(\begin{array}{cc}{I}_M& 0_{Q-M,M}\\ 0_{Q-M,M}& 0_{Q-M,Q-M}\end{array}\right)...\left(25\right)$

IFFT unit 535 receives the signal of self-controller 533, and this signal is carried out Q point IFFT, then this signal is outputed to P/S transducer 537.As used herein such, will be called by 535 signals of exporting from the IFFT unit b _Q ⁽²⁾Can pass through following formula (26) definition signal b _Q ⁽²⁾Formula (26) is planted below, d _MExpression is input to the data vector of controller 513, Z _{Q, M}, D _Q, Δ _Q, D _Q ^H, Z _QWith D _QThe matrix of controller 513, IFFT unit 521, linear processor 523, FFT unit 531, controller 533 and IFFT unit 525 is represented in expression respectively.

${\underset{\&OverBar;}{b}}_Q^{\left(2\right)}={\underset{\&OverBar;}{D}}_Q{\underset{\&OverBar;}{Z}}_Q{\underset{\&OverBar;}{D}}_Q^H{\underset{\&OverBar;}{\mathrm{\&Delta;}}}_Q{\underset{\&OverBar;}{D}}_Q{\underset{\&OverBar;}{Z}}_{Q,M}{\underset{\&OverBar;}{d}}_M...\left(26\right)$

As formula (26) is represented, fast frequency-hopped by after producing signal with (Q-M) that transmit empty data individual sub-carrier signal, carrying out with big or small Q by M the sub-carrier signal that adds the transmission real data, can be fixed on the quantity of employed subcarrier in each element of transmitter, thereby realize the stable hardware construction of transmitter, and to transmit the quantity M of subcarrier of data irrelevant with reality.

Simultaneously, the used for vector transfer that defines by formula (19) b _Q ⁽¹⁾With used for vector transfer by formula (26) definition b _Q ⁽²⁾Two conditions below must satisfying:

(1) first condition

In order to make used for vector transfer b _Q ⁽¹⁾And used for vector transfer b _Q ⁽²⁾Have identical form, need basis Δ _MThe value of element be provided with Δ _QThe value of element.Can be by following formula (27) expression first condition.

Wherein have ${\underset{\&OverBar;}{\mathrm{\&delta;}}}_{Q,F}={\underset{\&OverBar;}{D}}_Q^H\mathrm{diag}\left({\underset{\&OverBar;}{\mathrm{\&Delta;}}}_Q\right),{\underset{\&OverBar;}{\mathrm{\&delta;}}}_{Q,F}={\underset{\&OverBar;}{D}}_M^H\mathrm{diag}\left({\underset{\&OverBar;}{\mathrm{\&Delta;}}}_M\right)$

As mentioned above, in the 3rd example embodiment of the present invention,, in formula (27), need multiply by because empty data replace (Q-M) signal that individual subcarrier transmitted

So that the 3rd execution mode has the energy total amount identical with the energy total amount of second execution mode.

(2) second condition

Second condition is to make used for vector transfer second example embodiment always has identical value with the 3rd example embodiment according to the present invention.Can be by following formula (28) expression second condition.

Q≥2M-1.............(28)

The P/S transducer 131 of P/S transducer 537, protection interval inserter 539, D/A converter 541 and 543 execution of RF processor and Fig. 1, protection be the operation identical operations of inserter 133, D/A converter 135 and RF processor 137 at interval, so will omit detailed description here.

The structure of carrying out the transmitter of the FFH-OFDM communication system of the function of the 3rd example embodiment according to the present invention has been described above about Fig. 5.Below, with reference to Fig. 6 the structure of execution according to the receiver of the FFH-OFDM communication system of the function of the 3rd example embodiment of the present invention described.

Fig. 6 is the block diagram of structure of receiver of FFH-OFDM communication system that the function of execution the 3rd example embodiment according to the present invention is shown.

Comprise RF processor 611, D/A converter 613, channel estimator 615, protection interval removal 617, S/P transducer 619, FFT unit 621, controller 623, equalizer 625, IFFT unit 627, equalizer 629, FFT unit 631, controller 633 and P/S transducer 635 at the receiver shown in Fig. 6.Therefore the operation identical operations of RF processor 211, D/A converter 213, protection interval removal 217 and the S/P transducer 219 of the RF processor 611 of Fig. 6, D/A converter 613, protection interval removal 617 and 619 execution of S/P transducer and Fig. 2 will omit the detailed description to them here.Further, therefore the operation identical operations of the FFT unit 421 of 621 execution of FFT unit and Fig. 4 will omit detailed description here.

Be input to the signal in the FFT unit 621 e _QSignal with output from FFT unit 621 e _{F, Q}With signal by formula (20) and (21) definition e _QWith e _{F, Q}Identical.Further, be M owing in the transmitter of Fig. 5, transmit the quantity of the subcarrier of real data, so this M sub-carrier signal comprises real data and is somebody's turn to do (Q-M) individual sub-carrier signal at frequency-region signal e _{F, Q}In only comprise noise.Therefore, controller 623 is inserted into empty data (for example 0) signals of 621 outputs from the FFT unit e _{F, Q}In (Q-M) individual sub-carrier signal, then with M sub-carrier signal and (Q-M) individual sub-carrier signal all output to equalizer 625.In this case, controller 623 serves as certain zero insertion device (0 inserter).

Equalizer 625 equilibrium in frequency domain comes the signal of self-controller 623, then they is outputed to IFFT unit 627.The 627 pairs of signals from equalizer 625 in IFFT unit are carried out Q point IFFT, then this signal are outputed to equalizer 629.The signal that equalizer 629 receives from IFFT unit 627, balanced this signal outputs to FFT unit 631 with this signal then in time domain.As used herein like that, be the matrix of linear processor 523 of the transmitter of Fig. 5 with the defined matrix of equalizer 629 M _{Q, M}The E Mite conjugation and by following formula (29) expression.

M _t，Q＝ Δ _Q ^H..............................(29)

The signal that FFT unit 631 receives from equalizer 629 is carried out Q point FFT to this signal, then this signal is outputed to controller 623.From the signal of FFT unit 631 output, the number of subcarriers of carrying real data is M, and 633 of controllers are selected and the corresponding signal of quantity M of output and the data estimator that illustrates below by formula (30).Controller 633 is as a kind of selector.

${\underset{\&OverBar;}{\overset{^}{d}}}_M={\underset{\&OverBar;}{Z}}_{M,Q}{\underset{\&OverBar;}{D}}_Q^H{\underset{\&OverBar;}{M}}_{t,Q}{\underset{\&OverBar;}{D}}_Q{\underset{\&OverBar;}{M}}_{f,Q}{\underset{\&OverBar;}{Z}}_Q{\underset{\&OverBar;}{e}}_{f,Q}...\left(30\right)$

P/S transducer 635 conversion of signals of self-controller 633 in the future is a serial signal, will comprise this serial signal output of last input symbols then.

As mentioned above, second be identical according to the present invention with the used for vector transfer that transmitter transmitted of the 3rd example embodiment.Therefore, the receiver of the 3rd example embodiment or can together use with the transmitter of second example embodiment according to the present invention according to the present invention, perhaps the receiver of second example embodiment can together use with the transmitter of the 3rd example embodiment according to the present invention according to the present invention.

Only discuss wherein at the transfer of data that is target with user only about the top description of the present invention second and the 3rd example embodiment and to carry out fast frequency-hopped situation.Yet, when in ofdm communication system, in down link, all available band being divided and distributing to a plurality of user, for each of a plurality of users may all need the second and the 3rd example embodiment according to the present invention transmitter and receiver, use the subclass of all available band to carry out fast frequency-hopped.The 4th execution mode of the present invention proposes to consider under a plurality of users (being multiple access) situation and is used for fast frequency-hopped scheme.

Below, describe with reference to Fig. 7 and to be used under considering a plurality of users' situation, carrying out fast frequency-hopped ofdm system (below be called " fast frequency-hopped ofdm communication system ").

Fig. 7 is the block diagram that structure function, the transmitter in fast frequency-hopped ofdm communication system of execution the 4th example embodiment according to the present invention is shown.

Transmitter shown in Fig. 7 comprises fast frequency-hopped OFDM (FFH-OFDM) processing unit 710, multiplexer 720, IFFT unit 730, P/S transducer 740, protection inserter 750, D/A converter 760 and RF processor 770 at interval.FFH-OFDM processing unit 710 comprises a plurality of FFH-OFDM processors, comprises that processing is that a FFH-OFDM processor 711-1 of the data of target is the K FFH-OFDM processor 711-K of the data of target to handling with K user with first user.Purpose just to example illustrates the 2nd FFH-OFDM processor 711-2 that processing is the data of target with second user.

Supposing to distribute to first user is respectively M to K user's number of subcarriers ₁To M _K, and to send first user to respectively to the K user's data d ₁Be d _KWith data d ₁Be input to a FFH-OFDM processor 711-1, with data d _KBe input to K FFH-OFDM processor 711-K, and in an identical manner other data be input to corresponding FFH-OFDM processor.

The one FFH-OFDM processor 711-1 carries out fast frequency-hopped in the mode identical with mode described in the present invention second or the 3rd example embodiment and the OFDM modulation to K FFH-OFDM processor 711-K, exports modulation signal then b _M1Arrive b _MKFor example, when K FFH-OFDM processor 711-K carries out fast frequency-hopped and OFDM modulation in the mode identical with the mode of the present invention's second example embodiment, as the quantity M of the element of the actual use of institute subcarrier in the signal of output from the controller 333 of Fig. 3 _KCorresponding to b _MKOn the contrary, when K FFH-OFDM processor 711-K carries out fast frequency-hopped and OFDM modulation in the mode identical with the mode of the 3rd example embodiment according to the present invention, as with the quantity M of the element of the subcarrier of the actual use of institute from the signal of controller 333 outputs of Fig. 5 _KCorresponding to b _MK

The signal that to export from a FFH-OFDM processor 711-1 to K FFH-OFDM processor 711-K b _M1Arrive b _MKBe input to multiplexer 720.Multiplexer 720 is inserted into and does not also distribute to Any user with 0

In the corresponding sub-carrier signal, then this signal is outputed to IFFT unit 730.The 730 pairs of signals from multiplexer 720 in IFFT unit are carried out Q point IFFT, then this signal are outputed to P/S transducer 740.P/S transducer 740, protection at interval inserter 750, D/A converter 760 and RF processor 770 carry out with Fig. 1 /S transducer 131, the protection operation identical operations of inserter 133, D/A converter 135 and RF processor 137 at interval, therefore will omit detailed description here.Though the transmitter of Fig. 7 is carried out the multiplexing of the signal be used for a plurality of users, receiver can also demodulation its oneself signal.Therefore, according to the present invention the receiver of the second or the 3rd example embodiment also can use the transmitter that needn't use in the present embodiment with Fig. 7 corresponding separate receiver.

As mentioned above, example embodiment of the present invention can realize fast frequency-hopped in the ofdm communication system and obtain frequency diversity gain in an OFDM symbol time cycle, thereby improve systematic function.Further; example embodiment of the present invention can make the fast frequency-hopped subclass that not only is applied to all available band of ofdm communication system but also is applied to all available band; so that can in ofdm communication system, use the DCA scheme or use carry out in the situation of protection frequency band fast frequency-hopped, thereby the systematic function of providing.

Though illustrate and described the present invention with reference to its specific implementations, but it should be appreciated by those skilled in the art, under situation about not departing from, can carry out various modifications in form and details by the defined the spirit and scope of the present invention of claims.

Claims (48)

1. equipment that is used in the transmission of the signal of fast frequency-hopped-OFDM (FFH-OFDM) communication system, the FFH-OFDM communication system is divided into all available band a plurality of sub-carrier band and comprises a plurality of subchannels that each all comprises at least one sub-carrier band, and described equipment comprises:

Fast frequency-hopped (FFH) unit is used for giving several subcarriers of selecting from a plurality of subcarriers with the input data allocations, and is used for carrying out according to fast frequency-hopped pattern fast frequency-hopped to produce the FFH signal;

The fast Fourier transform (FFT) unit is used for the FFH signal is carried out FFT;

Controller is used for empty data are inserted into all the other subcarriers, and these all the other subcarriers comprise the subcarrier except selected subcarrier;

Fast adverse Fourier transform (IFFT) unit is used for comprising the selected subcarrier of importing data and comprising that all the other subcarriers of the empty data of being inserted carry out IFFT to produce an IFFT signal; And

Transmitter is used to transmit an IFFT signal.

2. equipment according to claim 1, wherein, described FFH unit comprises:

The 2nd IFFT unit is used for giving selected subcarrier with the input data allocations, then selected subcarrier is carried out IFFT; With

Linear processor is used for the selected subcarrier execution linear process to the IFFT that has experienced the 2nd IFFT unit, so that selected subcarrier has predetermined gain.

3. equipment as claimed in claim 2, wherein, described FFH unit is carried out fast frequency-hopped according to the fast frequency-hopped matrix that defines below

${\left[{\underset{\&OverBar;}{G}}_M\right]}_{n,m}=\frac{1}{\sqrt{M}}\left[\exp \right\{j2\mathrm{\&pi;}(n-1)\&CenterDot;\frac{{\left[\mathrm{\&Phi;}\right]}_{n,m}}{M}\left\}\right],m,n=1,...,M$

Wherein, n represents sample index, and m represents sub-channel index, [Ф] _{N, m}Be illustrated in the subcarrier of the data that transmit the m subchannel on the n sample and the quantity that M represents selected subcarrier from employed all available Q subcarriers the FFH-OFDM communication system.

4. equipment according to claim 3, wherein said the 2nd IFFT unit is according to the IFFT matrix of M point IFFT unit D _M, on the basis of signal, the sub-carrier signal corresponding with M subcarrier carried out IFFT, described IFFT matrix to a carrier wave D _MBe defined as follows

${\left[{\underset{\&OverBar;}{D}}_M\right]}_{n,m}=\frac{1}{\sqrt{M}}\left[\exp \right\{j2\mathrm{\&pi;}(n-1)\&CenterDot;\frac{m-1}{M}\left\}\right],m,n=1,...,M.$

5. equipment according to claim 4, wherein, described linear processor is by being when circulating fast frequency-hopped pattern when fast frequency-hopped pattern, and the sub-carrier signal that will pass through the IFFT processing in the 2nd IFFT unit multiply by predetermined diagonal matrix carries out linear process.

6. equipment according to claim 5, wherein, described linear processor is according to diagonal matrix Δ _M, carry out linear process, described diagonal matrix about the sub-carrier signal of handling through IFFT in the 2nd IFFT unit Δ _MBe defined as follows

Δ _M＝ G _M D _M ^H

Wherein, D _M ^HIt is the IFFT matrix D _MThe E Mite conjugation.

7. equipment according to claim 6, wherein, the fast frequency-hopped pattern that circulates is the fast frequency-hopped pattern as giving a definition

[Ф] _n，m＝mod(f _n+m-1，M)，m＝1，...，M

Wherein, the f of fast frequency-hopped pattern _nIt is the subcarrier that on the n sample, transmits the data of first subchannel.

8. method that is used in the transmission of the signal of fast frequency-hopped-OFDM (FFH-OFDM) communication system, the FFH-OFDM communication system is divided into all available band a plurality of sub-carrier band and comprises a plurality of subchannels that each all comprises at least one sub-carrier band, and the method comprising the steps of:

Give several subcarriers of from a plurality of subcarriers, selecting with the input data allocations, and carry out fast frequency-hopped (FFH), to produce the FFH signal according to fast frequency-hopped pattern;

The FFH signal is carried out fast Fourier transform (FFT);

Empty data are inserted in all the other subcarriers, and these all the other subcarriers comprise the subcarrier except selected subcarrier;

To comprising the selected subcarrier of importing data and comprising that all the other subcarriers of the empty data of being inserted carry out fast adverse Fourier transform (IFFT) to produce an IFFT signal; With

Transmit the signal of the IFFT that has experienced the IFFT unit through conversion.

9. method according to claim 8, wherein, the step of carrying out FFH comprises step:

(1) will import data allocations and give selected subcarrier, then selected subcarrier be carried out IFFT; With

(2) the selected subcarrier of the IFFT that experienced the 2nd IFFT unit is carried out linear process, so that selected subcarrier has predetermined gain.

10. method as claimed in claim 9 wherein, in the step of described execution FFH, is carried out fast frequency-hopped according to the fast frequency-hopped matrix that defines below

${\left[{\underset{\&OverBar;}{G}}_M\right]}_{n,m}=\frac{1}{\sqrt{M}}\left[\exp \right\{j2\mathrm{\&pi;}(n-1)\&CenterDot;\frac{{\left[\mathrm{\&Phi;}\right]}_{n,m}}{M}\left\}\right],$ m，n＝1，...，M

Wherein, n represents sample index, and m represents sub-channel index, [Ф] _{N, m}Be illustrated in the subcarrier of the data that transmit the m subchannel on the n sample and the quantity that M represents selected subcarrier from employed all available Q subcarriers the FFH-OFDM communication system.

11. method according to claim 10, wherein, in step (1), according to the IFFT matrix of M point IFFT unit D _M, on the basis of signal, the sub-carrier signal corresponding with M subcarrier carried out IFFT, described IFFT matrix to a carrier wave D _MBe defined as follows

${\left[{\underset{\&OverBar;}{D}}_M\right]}_{n,m}=\frac{1}{\sqrt{M}}\left[\exp \right\{j2\mathrm{\&pi;}(n-1)\&CenterDot;\frac{m-1}{M}\left\}\right],$ m，n＝1，...，M。

12. method according to claim 11, wherein, in step (2), by being when circulating fast frequency-hopped pattern when fast frequency-hopped pattern, the sub-carrier signal that will pass through the IFFT processing in the 2nd IFFT unit multiply by predetermined diagonal matrix carries out linear process.

13. method according to claim 12, wherein, the fast frequency-hopped pattern that circulates is the fast frequency-hopped pattern as giving a definition

[Ф] _n，m＝mod(f _n+m-1，M)，m＝1，...，M

Wherein, the f of fast frequency-hopped pattern _nIt is the subcarrier that on the n sample, transmits the data of first subchannel.

14. equipment that is used in the signal transmission of fast frequency-hopped-OFDM (FFH-OFDM) communication system, the FFH-OFDM communication system is divided into all available band a plurality of sub-carrier band and comprises a plurality of subchannels that each all comprises at least one sub-carrier band, and described equipment comprises:

The first fast Fourier transform (FFT) unit is used for received signal is carried out FFT;

Controller is used for separating all the other subcarriers from the signal of handling through FFT in a FFT unit, these all the other subcarriers comprise and then empty data being inserted in all the other subcarriers except the subcarrier several selected subcarriers;

First equalizer is used for the output signal at the frequency domain balance controller;

Fast adverse Fourier transform (IFFT) unit, be used for according to the applied fast frequency-hopped matrix of transfer equipment to first equalizer the balanced signal of crossing carry out IFFT;

Second equalizer is used at the balanced signal of handling through IFFT of time domain; With

The second fast Fourier transform (FFT) unit is used for being carried out FFT in time domain by the balanced signal of crossing.

15. equipment according to claim 14, wherein, described fast frequency-hopped defined matrix is as follows

${\left[{\underset{\&OverBar;}{G}}_M\right]}_{n,m}=\frac{1}{\sqrt{M}}\left[\exp \right\{j2\mathrm{\&pi;}(n-1)\&CenterDot;\frac{{\left[\mathrm{\&Phi;}\right]}_{n,m}}{M}\left\}\right],$ m，n＝1，...，M

Wherein, G _MRepresent fast frequency-hopped matrix, n represents sample index, and m represents sub-channel index, [Ф] _{N, m}Be illustrated in the subcarrier of the data that transmit the m subchannel on the n sample and the quantity that M represents selected subcarrier from employed all available Q subcarriers the FFH-OFDM communication system.

16. equipment according to claim 15, wherein, described second equalizer is by being when circulating fast frequency-hopped pattern when fast frequency-hopped pattern, and the E Mite conjugation that will multiply by predetermined diagonal matrix through the sub-carrier signal that IFFT handles is carried out equilibrium.

17. equipment according to claim 16, wherein, the fast frequency-hopped pattern that circulates is the fast frequency-hopped pattern as giving a definition

[Ф] _n，m＝mod(f _n+m-1，M)，m＝1，...，M

Wherein, the f of fast frequency-hopped pattern _nIt is the subcarrier that on the n sample, transmits the data of first subchannel.

18. method that is used in the signal transmission of fast frequency-hopped-OFDM (FFH-OFDM) communication system, the FFH-OFDM communication system is divided into all available band a plurality of sub-bands and comprises a plurality of subchannels that each all comprises at least one sub-carrier band, and described method comprises step:

(1) received signal is carried out fast Fourier transform (FFT);

(2) from the signal of a FFT unit, handling, separate all the other subcarriers through FFT, these all the other subcarriers comprise the subcarrier except transfer equipment passes through its several selected subcarriers that transmit data, then empty data are inserted in all the other subcarriers;

(3) signal that equalization step (2) is produced in frequency domain;

(4) according to fast frequency-hopped matrix in frequency domain the balanced signal of crossing carry out fast adverse Fourier transform (IFFT);

(5) the balanced signal of handling through IFFT in time domain; With

(6) in time domain, being carried out fast Fourier transform (FFT) by the balanced signal of crossing.

19. method according to claim 18, described fast frequency-hopped defined matrix is as follows

${\left[{\underset{\&OverBar;}{G}}_M\right]}_{n,m}=\frac{1}{\sqrt{M}}\left[\exp \right\{j2\mathrm{\&pi;}(n-1)\&CenterDot;\frac{{\left[\mathrm{\&Phi;}\right]}_{n,m}}{M}\left\}\right],$ m，n＝1，...，M

Wherein, G _MRepresent fast frequency-hopped matrix, n represents sample index, and m represents sub-channel index, [Ф] _{N, m}Be illustrated in the subcarrier of the data that transmit the m subchannel on the n sample and the quantity that M represents selected subcarrier from employed all available Q subcarriers the FFH-OFDM communication system.

20. method according to claim 19, wherein, in step (5), by being when circulating fast frequency-hopped pattern when fast frequency-hopped pattern, the E Mite conjugation that will multiply by predetermined diagonal matrix through the sub-carrier signal that IFFT handles is carried out equilibrium.

21. equipment according to claim 20, wherein, the fast frequency-hopped pattern that circulates is the fast frequency-hopped pattern as giving a definition

[Ф] _n，m＝mod(f _n+m-1，M)，m＝1，...，M

Wherein, the f of fast frequency-hopped pattern _nIt is the subcarrier that on the n sample, transmits the data of first subchannel.

22. equipment that is used in the signal transmission of fast frequency-hopped-OFDM (FFH-OFDM) communication system, the FFH-OFDM communication system is divided into all available band a plurality of sub-carrier band and comprises a plurality of subchannels that each all comprises at least one sub-carrier band, and described equipment comprises:

First controller is used for empty data are inserted into all the other subcarriers, and these all the other subcarriers are included in the subcarrier except several selected subcarriers of importing data by its carrying in all available subcarriers;

Fast frequency-hopped (FFH) unit is used for giving several selected subcarriers with the input data allocations, and is used for carrying out according to fast frequency-hopped pattern fast frequency-hopped to produce the FFH signal;

The fast Fourier transform (FFT) unit is used for the FFH signal is carried out FFT;

Second controller is used for empty data are inserted into all the other subcarriers;

First fast adverse Fourier transform (IFFT) unit is used for comprising the selected subcarrier of importing data and comprising that all the other subcarriers of the empty data of being inserted carry out IFFT to produce an IFFT signal; With

Transmitter is used to transmit an IFFT signal.

23. equipment according to claim 22, wherein, described FFH unit comprises:

The 2nd IFFT unit is used for carrying out IFFT from the signal of first controller output; With

Linear processor is used to carry out the linear process of the subcarrier that the IFFT that experienced the 2nd IFFT unit handles, so that this subcarrier has predetermined gain.

24. equipment according to claim 23, wherein, described FFH unit is carried out fast frequency-hopped according to the fast frequency-hopped matrix that defines below

${\left[{\underset{\&OverBar;}{G}}_Q\right]}_{n,m}=\frac{1}{\sqrt{Q}}\left[\exp \right\{j2\mathrm{\&pi;}(n-1)\&CenterDot;\frac{{\left[\mathrm{\&Phi;}\right]}_{n,m}}{Q}\left\}\right],$ m，n＝1，...，Q

Wherein, n represents sample index, and m represents sub-channel index, [Ф] _{N, m}Being illustrated in the subcarrier and the Q that transmit the data of m subchannel on the n sample represents from the quantity of employed all available subcarriers the FFH-OFDM communication system.

25. equipment according to claim 24, wherein said the 2nd IFFT unit is according to the IFFT matrix of Q point IFFT unit D _Q, on the basis of signal, the sub-carrier signal corresponding with M subcarrier carried out IFFT, described Q point IFFT matrix to a carrier wave D _QBe defined as follows

${\left[{\underset{\&OverBar;}{D}}_Q\right]}_{n,m}=\frac{1}{\sqrt{Q}}\left[\exp \right\{j2\mathrm{\&pi;}(n-1)\&CenterDot;\frac{m-1}{Q}\left\}\right],$ m，n＝1，...，Q。

26. equipment according to claim 25, wherein, described linear processor is by being when circulating fast frequency-hopped pattern when fast frequency-hopped pattern, and the sub-carrier signal that will pass through the IFFT processing in the 2nd IFFT unit multiply by predetermined diagonal matrix carries out linear process.

27. equipment according to claim 26, wherein, the fast frequency-hopped pattern that circulates is the fast frequency-hopped pattern as giving a definition

[Ф] _n，m＝mod(f _n+m-1，M)，m＝1，...，M

Wherein, the f of fast frequency-hopped pattern _nIt is the subcarrier that on the n sample, transmits the data of first subchannel.

28. equipment according to claim 27, wherein, described diagonal matrix satisfies

With

Wherein have ${\underset{\&OverBar;}{\mathrm{\&delta;}}}_{Q,F}={\underset{\&OverBar;}{D}}_Q^H\mathrm{diag}\left({\underset{\&OverBar;}{\mathrm{\&Delta;}}}_Q\right),{\underset{\&OverBar;}{\mathrm{\&delta;}}}_{Q,F}={\underset{\&OverBar;}{D}}_M^H\mathrm{diag}\left({\underset{\&OverBar;}{\mathrm{\&Delta;}}}_M\right)$

Q≥2M-1，

Wherein M represents the quantity of selected subcarrier, Δ _QThe expression diagonal matrix and Δ _MExpression and diagonal matrix when not being inserted into empty data in all the other subcarriers fast frequency-hopped when execution.

29. method that is used in the signal transmission of fast frequency-hopped-OFDM (FFH-OFDM) communication system, the FFH-OFDM communication system is divided into all available band a plurality of sub-carrier band and comprises a plurality of subchannels that each all comprises at least one sub-carrier band, and described method comprises step:

(1) empty data are inserted in all the other subcarriers, these all the other subcarriers are included in the subcarrier except several selected subcarriers of importing data by its carrying in all available subcarriers;

(2) will import data allocations and give several selected subcarriers, carry out fast frequency-hopped then according to fast frequency-hopped pattern to produce the FFH signal;

(3) the FFH signal is carried out fast Fourier transform (FFT);

(4) empty data are inserted in all the other subcarriers;

(5) to comprising the selected subcarrier of importing data and comprising that all the other subcarriers of the empty data of having inserted carry out fast adverse Fourier transform to produce the IFFT signal; With

(6) transmit the IFFT signal.

30. method according to claim 29, wherein, step (2) comprises step:

(7) signal that is produced in the step (1) is carried out IFFT; With

(8) carry out the linear process of the subcarrier that the IFFT experienced step (7) handles, so that this subcarrier has predetermined gain.

31. method according to claim 30 wherein, in step (2), is carried out fast frequency-hopped according to the fast frequency-hopped matrix that defines below

${\left[{\underset{\&OverBar;}{G}}_Q\right]}_{n,m}=\frac{1}{\sqrt{Q}}\left[\exp \right\{j2\mathrm{\&pi;}(n-1)\&CenterDot;\frac{{\left[\mathrm{\&Phi;}\right]}_{n,m}}{Q}\left\}\right],$ m，n＝1，...，Q

Wherein, n represents sample index, and m represents sub-channel index, [Ф] _{N, m}Be illustrated in the subcarrier of the data that transmit the m subchannel on the n sample and the quantity that Q is illustrated in employed all available subcarriers in the FFH-OFDM communication system.

32. method according to claim 31, wherein, in step (7), according to the IFFT matrix of Q point IFFT unit D _Q, on the basis of signal, the sub-carrier signal corresponding with M subcarrier carried out IFFT, described Q point IFFT matrix to a carrier wave D _QBe defined as follows

${\left[{\underset{\&OverBar;}{D}}_Q\right]}_{n,m}=\frac{1}{\sqrt{Q}}\left[\exp \right\{j2\mathrm{\&pi;}(n-1)\&CenterDot;\frac{m-1}{Q}\left\}\right],$ m，n＝1，...，Q。

33. method according to claim 32, wherein, in step (8), by being when circulating fast frequency-hopped pattern when fast frequency-hopped pattern, the sub-carrier signal that will pass through the IFFT processing in the 2nd IFFT unit multiply by predetermined diagonal matrix carries out linear process.

34. method according to claim 33, wherein, the fast frequency-hopped pattern that circulates is the fast frequency-hopped pattern as giving a definition

[Ф] _n，m＝mod(f _n+m-1，M)，m＝1，...，M

Wherein, the f of fast frequency-hopped pattern _nIt is the subcarrier that on the n sample, transmits the data of first subchannel.

35. method according to claim 34, wherein, described diagonal matrix satisfies

With

Wherein have ${\underset{\&OverBar;}{\mathrm{\&delta;}}}_{Q,F}={\underset{\&OverBar;}{D}}_Q^H\mathrm{diag}\left({\underset{\&OverBar;}{\mathrm{\&Delta;}}}_Q\right),{\underset{\&OverBar;}{\mathrm{\&delta;}}}_{Q,F}={\underset{\&OverBar;}{D}}_M^H\mathrm{diag}\left({\underset{\&OverBar;}{\mathrm{\&Delta;}}}_M\right)$

Q≥2M-1，

Wherein M represents the quantity of predetermined subcarrier, Δ _QThe expression diagonal matrix and Δ _MExpression is when the fast frequency-hopped and diagonal matrix when step (1) is inserted into empty data in all the other subcarriers not of execution.

36. equipment that is used in the signal transmission of fast frequency-hopped-OFDM (FFH-OFDM) communication system, the FFH-OFDM communication system is divided into all available band a plurality of sub-carrier band and comprises a plurality of subchannels that each all comprises at least one sub-carrier band, and described equipment comprises:

The first fast Fourier transform (FFT) unit is used for received signal is carried out FFT;

First controller, be used for from the signal that has passed through the FFT processing in a FFT unit, separating all the other subcarriers, these all the other subcarriers comprise the subcarrier except transfer equipment passes through its several selected subcarriers that transmit data, then empty data are inserted in all the other subcarriers;

First equalizer is used for the output signal at the frequency domain balance controller;

Fast adverse Fourier transform (IFFT) unit is used for according to the applied fast frequency-hopped matrix of transfer equipment the signal through first equalizer equalizes being carried out IFFT;

Second equalizer is used at the balanced signal through IFFT of time domain;

Second fast fourier transform (IFFT) unit is used for carrying out FFT at the balanced signal of crossing of time domain; With

Second controller is used for separating all the other subcarriers from the signal of handling through FFT in the 2nd FFT unit, then empty data is inserted in these all the other subcarriers.

37. equipment according to claim 36, wherein, described fast frequency-hopped defined matrix is as follows

${\left[{\underset{\&OverBar;}{G}}_Q\right]}_{n,m}=\frac{1}{\sqrt{Q}}\left[\exp \right\{j2\mathrm{\&pi;}(n-1)\&CenterDot;\frac{{\left[\mathrm{\&Phi;}\right]}_{n,m}}{Q}\left\}\right],$ m，n＝1，...，Q

Wherein, G _MRepresent fast frequency-hopped matrix, n represents sample index, and m represents sub-channel index, [Ф] _{N, m}Be illustrated in the subcarrier of the data that transmit the m subchannel on the n sample and the quantity that Q is illustrated in employed all available subcarriers in the FFH-OFDM communication system.

38. according to the described equipment of claim 37, wherein described when fast frequency-hopped pattern is the fast frequency-hopped pattern of circulation, second equalizer is carried out equilibrium by the E Mite conjugation that will multiply by predetermined diagonal matrix through the sub-carrier signal that IFFT handles.

39. according to the described equipment of claim 38, wherein, the fast frequency-hopped pattern that circulates is the fast frequency-hopped pattern as giving a definition

[Ф] _n，m＝mod(f _n+m-1，M)，m＝1，...，M

Wherein, the f of fast frequency-hopped pattern _nIt is the subcarrier that on the n sample, transmits the data of first subchannel.

40. according to the described equipment of claim 39, wherein, described diagonal matrix satisfies

With

Wherein have ${\underset{\&OverBar;}{\mathrm{\&delta;}}}_{Q,F}={\underset{\&OverBar;}{D}}_Q^H\mathrm{diag}\left({\underset{\&OverBar;}{\mathrm{\&Delta;}}}_Q\right),{\underset{\&OverBar;}{\mathrm{\&delta;}}}_{Q,F}={\underset{\&OverBar;}{D}}_M^H\mathrm{diag}\left({\underset{\&OverBar;}{\mathrm{\&Delta;}}}_M\right)$

Q≥2M-1，

Wherein M represents the quantity of the subcarrier be scheduled to, Δ _QThe expression diagonal matrix and Δ _MExpression and diagonal matrix when not being inserted into empty data in all the other subcarriers fast frequency-hopped when execution.

41. method that is used in the signal transmission of fast frequency-hopped-OFDM (FFH-OFDM) communication system, the FFH-OFDM communication system is divided into all available band a plurality of sub-carrier band and comprises a plurality of subchannels that each all comprises at least one sub-carrier band, and described method comprises step:

(1) received signal is carried out fast Fourier transform (FFT);

(2) from the signal that a FFT unit, has passed through the FFT processing, separate all the other subcarriers, these all the other subcarriers comprise the subcarrier except transfer equipment passes through its several selected subcarriers that transmit data, then empty data are inserted in all the other subcarriers;

(3) the balanced signal that is produced in step (2);

(4) according to fast frequency-hopped matrix the signal through equilibrium in frequency domain is carried out fast adverse Fourier transform (IFFT);

(5) balanced signal in time domain through IFFT;

(6) the balanced signal of crossing in time domain is carried out fast Fourier transform (FFT); With

(7) from the signal of the 2nd FFT unit, handling, separate all the other subcarriers, then empty data are inserted in these all the other subcarriers through FFT.

42. according to the described method of claim 41, wherein, described fast frequency-hopped defined matrix is as follows

${\left[{\underset{\&OverBar;}{G}}_Q\right]}_{n,m}=\frac{1}{\sqrt{Q}}\left[\exp \right\{j2\mathrm{\&pi;}(n-1)\&CenterDot;\frac{{\left[\mathrm{\&Phi;}\right]}_{n,m}}{Q}\left\}\right],$ m，n＝1，...，Q

Wherein, G _MRepresent fast frequency-hopped matrix, n represents sample index, and m represents sub-channel index, [Ф] _{N, m}Be illustrated in the subcarrier of the data that transmit the m subchannel on the n sample and the quantity that Q is illustrated in employed all available subcarriers in the FFH-OFDM communication system.

43., wherein, in step (5), when fast frequency-hopped pattern is the fast frequency-hopped pattern of circulation, carry out equilibrium by the E Mite conjugation that will multiply by predetermined diagonal matrix through the sub-carrier signal that IFFT handles according to the described method of claim 42.

44. according to the described method of claim 43, wherein, the fast frequency-hopped pattern that circulates is the fast frequency-hopped pattern as giving a definition

[Ф] _n，m＝mod(f _n+m-1，M)，m＝1，...，M

Wherein, the f of fast frequency-hopped pattern _nIt is the subcarrier that on the n sample, transmits the data of first subchannel.

45. according to the described method of claim 44, wherein, described diagonal matrix satisfies

With

Wherein have ${\underset{\&OverBar;}{\mathrm{\&delta;}}}_{Q,F}={\underset{\&OverBar;}{D}}_Q^H\mathrm{diag}\left({\underset{\&OverBar;}{\mathrm{\&Delta;}}}_Q\right),{\underset{\&OverBar;}{\mathrm{\&delta;}}}_{Q,F}={\underset{\&OverBar;}{D}}_M^H\mathrm{diag}\left({\underset{\&OverBar;}{\mathrm{\&Delta;}}}_M\right)$

Q≥2M-1，

Wherein M represents the quantity of the subcarrier be scheduled to, Δ _QThe expression diagonal matrix and Δ _MExpression and diagonal matrix when in step (1) not being inserted into empty data in all the other subcarriers fast frequency-hopped when execution.

46. equipment that is used in the signal transmission of fast frequency-hopped-OFDM (FFH-OFDM) communication system, the FFH-OFDM communication system is divided into all available band a plurality of sub-carrier band and comprises a plurality of subchannels that each all comprises at least one sub-carrier band, and described equipment comprises:

Fast frequency-hopped-OFDM (FFH-OFDM) processing unit, be used to and carry out fast frequency-hopped and be ofdm signal by the signal that each user transmits conversion of signals, this FFH-OFDM processing unit comprises a plurality of processors, its each all will import data allocations and give several subcarriers of from a plurality of subcarriers, selecting and be used for carrying out fast frequency-hopped to produce the FFH-OFDM signal according to fast frequency-hopped pattern;

Multiplexer is used for multiplexing FFH-OFDM signal;

Fast adverse Fourier transform (IFFT) unit is used for carrying out IFFT through multiplexing signal; With

Transmitter is used to transmit the signal through IFFT.

47. according to the described equipment of claim 46, wherein, each described processor comprises:

The 2nd IFFT unit is used for giving selected subcarrier with the input data allocations, then this subcarrier is carried out IFFT; With

Linear processor is used to carry out the linear process of the selected subcarrier that the IFFT that experienced the 2nd IFFT unit handles, and makes selected subcarrier have predetermined gain.

48. according to the described equipment of claim 46, wherein, each described processor comprises:

First controller is used for empty data are inserted into all the other subcarriers, and described all the other subcarriers comprise the subcarrier except several selected subcarriers of importing data by its carrying in all available subcarriers;

The 2nd IFFT unit is used for carrying out IFFT from the signal of first controller output; With

Linear processor is used to carry out the linear process of the subcarrier of the IFFT that has experienced the 2nd IFFT unit, makes this subcarrier have predetermined gain.

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