CN101536447A - Method and apparatus for transmitting uplink signal, and method and apparatus for generating uplink signal in communication system - Google Patents

Abstract

When a terminal generates an uplink signal in a communication system, the terminal frequency hops over time a sequence used to distinguish itself from another terminal. The terminal generates an uplink signal by multiplying a transmission symbol by a sequence of transmission times corresponding to the transmission symbol.

Description

The method and apparatus that is used for transmitting the method and apparatus of uplink signal and is used for generating uplink signal in communication system

Technical field

The method and apparatus that the present invention relates to be used for transmitting the method and apparatus of uplink signal and be used for generating uplink signal in communication system.

Background technology

In communication means, because different user uses different frequencies at data channel, so between different user, there is not interference based on OFDM (OFDM).Be used for using the method for different frequency to be called as frequency division multiplexing (FDM) for different user.Yet, come the code division multiplexing (CDM) of identifying user to be suitable for reference signal or control channel by using code.Because CDM can effectively use the resource that is used for reference signal or control channel, so CDM is better than FDM.CDM is classified as by the OFDM symbol unit and directly expands the time domain CDM of (spread) and the frequency domain CDM that expands in an OFDM code element in frequency domain.

In frequency domain CDM, before transmitting identical sequence, different user multiply by identical sequence the multiple sine wave with out of phase slope.At this moment, use multiple sine wave but not the reason of Hadamard matrix is to guarantee by the signal processing at receiver place the orthogonality between the user.Because it is identical with cyclic shift in the time domain any sequence to be multiply by multiple sine wave with the phase place that increases along with frequency linearity in frequency domain, be called as that cyclic shift is handled or the circulation delay processing so be used to multiply by the processing of multiple sine wave.

Can be by the function of frequency difference between the subcarrier and the expansion of the delay in the propagation channel, the user's that provide when using frequency domain CDM, in an OFDM code element, can permit simultaneously number.At this moment, the granularity of each user's cyclic shift is set to larger than the delay expansion in the propagation channel.In cellular communication environment, owing to be difficult to estimate maximum delay spread, so the value of maximum delay spread at random is set.Correspondingly, the channel delay spread of Any user can be greater than the cyclic shift in the cellular communication environment, and therefore the interference between the user may take place.

Summary of the invention

Technical problem

The invention provides a kind of interference signals transfer approach and equipment that is used between communication system minimizing user.

Technical scheme

In order to solve above technical problem, according to an aspect of the present invention, provide a kind of method that is used for transmitting uplink signal in terminal.This method comprises: transmit code element with first and multiply by first sequence that is used to distinguish described terminal and another terminal, and transmit code element in first delivery time place's transmission first.This method further comprises: transmit code element with second and multiply by second sequence that is used to distinguish described terminal and other-end, and transmit first at second delivery time place that was different from for first delivery time and transmit code element.Second sequence is different from first sequence.

According to a further aspect in the invention, provide a kind of method that is used for generating uplink signal in terminal.This method comprises: along with the time is carried out frequency hopping to the sequence that is used to distinguish described terminal and other-end; And generate uplink signal by transmitting the sequence that code element multiply by the delivery time corresponding with this transmission code element.

At this moment, this sequence can be corresponding with the product of code that is used to distinguish this terminal and other-end and basic sequence, and can carry out frequency hopping to this code along with the time.Replacedly, described sequence can be by basic sequence is carried out the value that cyclic shift generates, and can carry out frequency hopping to this cyclic shift along with the time.Replacedly, the sub-district that can belong to based on described terminal, along with the time is carried out frequency hopping to this sequence.

According to another aspect of the invention, provide a kind of method of sequence that is used for generating the uplink signal of a plurality of terminals be used to comprise first terminal and second terminal in communication system.This method comprises: first sequence that is provided for first terminal; Second sequence that is used for second terminal is set to be different from first sequence; And the frequency hopping pattern that first sequence and second sequence were set according to the delivery time.

At this moment, described frequency hopping pattern can be set, make first sequence of the delivery time of winning be different from first sequence of second delivery time, and second sequence of first delivery time be different from second sequence of second delivery time.Replacedly, described frequency hopping pattern can be set, make when locating first sequence when adjacent in first delivery time, locating first sequence and second sequence is non-conterminous in second delivery time with second sequence.

In addition, this first sequence can be corresponding with the product of the code that is used for first terminal with basic sequence, and this second sequence can be corresponding with the product of the code that is used for second terminal with basic sequence.

At this moment, can this first sequence be given by the code that is used for first terminal and utilize first cyclic shift to come the sequence that basic sequence is shifted and generates, and can this second sequence be given by the code that is used for second terminal and utilize second cyclic shift to come the sequence that basic sequence is shifted and generates.In addition, described frequency hopping pattern can be the pattern that is used for along with the time first and second cyclic shifts being carried out frequency hopping.In addition, can be provided for changing the pattern of basic sequence along with the time.

Replacedly, the sub-district that the sub-district that can be respectively belongs to based on first terminal and second terminal belong to, according to the delivery time is provided with the frequency hopping pattern of first sequence and second sequence.

According to another aspect of the invention, provide a kind of equipment that is used for transmitting uplink signal in terminal.This equipment comprises: be used for transmitting code element with first and multiply by the device that is used to distinguish first sequence of this terminal and another terminal and is used for transmitting in first delivery time place's transmission first code element; And be used for the second transmission code element be multiply by the device that is used to distinguish second sequence of this terminal and other-end and is used for transmitting at second delivery time place that was different from for first delivery time first transmission code element.Second sequence is different from first sequence.Second sequence is different from first sequence.

According to another aspect of the invention, provide a kind of equipment that is used for generating uplink signal in terminal.This equipment comprises: the device that is used for along with the time sequence that is used to distinguish this terminal and another terminal being carried out frequency hopping; And be used for by transmitting the device that sequence that code element multiply by the delivery time corresponding with this transmission code element generates uplink signal.

According to another aspect of the invention, provide a kind of equipment of sequence that is used for generating the uplink signal of a plurality of terminals be used to comprise first terminal and second terminal in communication system.This equipment comprises: the device that is used to be provided for first sequence of first terminal; Second sequence that is used for second terminal is set to be different from the device of first sequence; And the device that is used for being provided with the frequency hopping pattern of first sequence and second sequence according to the delivery time.

Beneficial effect

According to example embodiment of the present invention, when using frequency domain CDM method, interference between can the randomization user and/or the interference between the sub-district.

Description of drawings

Fig. 1 shows the schematic block diagram of the uplink signal transfer equipment of first example embodiment according to the present invention.

Fig. 2 shows the flow chart of the uplink signal transfer approach of first example embodiment according to the present invention.

Fig. 3 shows the schematic block diagram of the receiving equipment in the base station of first example embodiment according to the present invention.

Fig. 4 shows the schematic block diagram that CDM in the receiving equipment of Fig. 3 removes mapper.

Fig. 5 shows the flow chart of the method that is used to extract desired subscriber signal.

Fig. 6 shows the signal that is gone the mapper extraction by the CDM of Fig. 4.

Fig. 7 shows when using general CDM sequence, according to the time delay domain signal of the process of time.

Fig. 8 shows according to the present invention first example embodiment when the CDM sequence is carried out frequency hopping, according to the time delay domain signal of the process of time.

Fig. 9 shows the transfer structure of detection (sounding) reference signal of second example embodiment according to the present invention.

Figure 10 shows the transfer structure of the ACK/NACK channel of the 3rd example embodiment according to the present invention.

Figure 11 shows the figure that is used to explain the interference between the sub-district.

Figure 12 shows the example that is used in the method for the reference signal of cellular environment arranging data channel.

Figure 13 shows the example of the data transmission of two sectors that are arranged in the same base place.

Embodiment

In the following detailed description, only illustrated and described some example embodiment of the present invention by the mode of explanation simply.Those skilled in the art will recognize that, can revise described embodiment with various different modes, and all can not break away from the spirit or scope of the present invention.Correspondingly, drawing and description will be considered to be actually illustrative and be nonrestrictive.Run through in the specification, same Reference numeral refers to same element.

Run through in the following detail specifications and claims, unless describe on the contrary clearly, otherwise word " comprises/comprise (comprise/include) " or will be understood that to have hinted such as the distortion of " comprises/includes " or " comprising/including " and comprise the element of being stated but do not get rid of any other element.Each module is can unit that realize by the combination of hardware, software or hardware and software, that be used to handle at least one function or operation.

Now, will the uplink signal transfer approach and the uplink signal transfer equipment of the example embodiment according to the present invention be described with reference to the accompanying drawings.Although will use the example of the system description of OFDM modulating/demodulating as communication system in example embodiment of the present invention, the present invention also can be applicable to various communication systems.

At first, the uplink signal transfer equipment and the uplink signal transfer approach of the terminal of first example embodiment according to the present invention will be described with reference to figure 1 and Fig. 2.

Fig. 1 shows the uplink signal transfer equipment of first example embodiment according to the present invention or the schematic block diagram of the equipment of generation, and Fig. 2 shows the uplink signal transfer approach of first example embodiment according to the present invention or the flow chart of generation method.

As shown in Figure 1, the uplink signal transfer equipment comprises: CDM mapper 110, inverse fast Fourier transformer (IFFT) 120, parallel-to-serial converter 130, Cyclic Prefix (CP) adder 140, digital to analog converter 150 and radio frequency (RF) reflector 160.

With reference to figure 2, the transmission code element s that CDM mapper 110 will transmit at delivery time #n place multiply by and be used for sequence that itself and another user's's (that is terminal) sequence is distinguished mutually And distribute the transmission code element (step S11) that multiply by this sequence to frequency range.Because sequence

Be used to utilize code to come identifying user, thus in example embodiment of the present invention sequence

To be called as the CDM sequence.Can with the transmission code element s of user #k ^(k)The CDM sequence that multiplies each other

Be defined as vector shown in Equation 1.

Equation 1

${\stackrel{\‾}{c}}_{i_n}^{\left(k\right)}={[c_{i_n}^{\left(k\right)}\left(0\right)c_{i_n}^{\left(k\right)}\left(1\right)...c_{i_n}^{\left(k\right)}(N_f-1)]}^T$

Expressed as equation 2, the CDM sequence

Can be defined as basic sequence c ₀With the code that is used for identifying user

Product, and in example embodiment of the present invention, be used for the code of identifying user

Has the multiple sine wave that linear phase increases characteristic with being described to.Multiply each other corresponding to the displacement in the time domain with multiple sine wave in the frequency domain.Correspondingly, by in time domain with basic sequence c ₀Cyclic shift Δ τ i _n(k) provide the CDM sequence

Equation 2

${\stackrel{\‾}{c}}_{i_n}^{\left(k\right)}={\stackrel{\‾}{c}}_0\⊗{\stackrel{\‾}{\mathrm{\Ψ}}}_{i_n}^{\left(k\right)}$

${\stackrel{\‾}{c}}_0={[c_0\left(0\right)c_0\left(1\right)...c_0(N_f-1)]}^T$

${\stackrel{\‾}{\mathrm{\Ψ}}}_{i_n}^{\left(k\right)}={[1e^{-j\frac{2\mathrm{\π}}{N_f}\mathrm{\Δ}{\mathrm{\τi}}_n\left(k\right)}...e^{-j\frac{2\mathrm{\π}}{N_f}(N_f-1)\mathrm{\Δ}{\mathrm{\τi}}_n\left(k\right)}]}^T$

Here,

The operation that expression be multiply by each element of another vector with each element of a vector, i _n(k) represent the numbering in the CDM sequence of delivery time #n place use, and Δ τ represents the granularity of cyclic shift, N by user #k _fExpression is used to transmit the number of the subcarrier of CDM sequence, and with basic sequence c ₀Give and do vector.

In equation 2, based on the numbering i of CDM _n(k) determine cyclic shift.For example, as the numbering i of CDM sequence _nWhen (k) increasing " 1 ", cyclic shift increases Δ τ.

IFFT 120 is the transmission signal (step S12) of time domain by carrying out contrary fast fourier transform with the transmission symbol transformations that multiplies each other with the CDM sequence.Parallel-to-serial converter 130 is serial transfer signal (step S13) with the transmission conversion of signals of this time domain, and CP adder 140 adds CP to this serial transfer signal (step S14).Digital to analog converter 150 transmits signal (step S15) with the transmission conversion of signals of having added CP for simulation, and RF reflector 160 should simulate the transmission conversion of signals be the RF signal, and transmit this RF signal (step S16) by transmission antenna 170.

Next, CDM mapper 110 will be different from the CDM sequence of delivery time #n

The CDM sequence

Be set to the CDM sequence (step S17) of delivery time # (n+1), and begin repetition from step S11.CDM mapper 110 passes through along with the time changes the CDM sequence

Numbering i _n(k) (that is, by change the cyclic shift value that is used for cyclic shift along with the time) comes along with the time changes the CDM sequence

Can in terminal, store the pattern that is used to change cyclic shift value to search tableau format.

On the other hand, the channel of the use CDM sequence of first example embodiment can be the channel that is used for distributing to identical frequency range in identical time domain a plurality of users according to the present invention.For example, detection reference signal or ACK/NACK channel can use the CDM sequence.Detection reference signal is the broadband signal by the terminal periodic transmission, and is used to the uplink channel characteristic is estimated, being used to control up-link power, and is used for regularly estimating.Therefore, all users transmit detection reference signal by using identical frequency range simultaneously.The ACK/NACK channel is to be used to notify terminal whether to receive the channel of downlink packet data, and must locate to have outstanding performance at low signal-to-noise ratio (SNR).Therefore, to many frequencies of ACK/NACK channel allocation and time resource, and a plurality of user can insert the ACK/NACK channel simultaneously.Correspondingly, the CDM sequence of example embodiment can be applied to detection reference signal and ACK/NACK channel according to the present invention.

In Fig. 1, when the CDM sequence is used for detection reference signal, transmit code element s ^(k)Be " 1 "; And when the CDM sequence is used for the ACK/NACK channel, transmit code element s ^(k)Be the ACK/NACK code element that will transmit.

Fig. 3 shows the schematic block diagram of the receiving equipment in the base station of first example embodiment according to the present invention, and Fig. 4 shows the schematic block diagram that CDM in the receiving equipment of Fig. 3 removes mapper.Fig. 5 shows the flow chart of the method that is used to extract desired subscriber signal, and Fig. 6 shows the signal that the CDM by Fig. 4 goes mapper to extract.

As shown in Figure 3, receiving equipment comprises: RF receiver 210, analog to digital converter 220, CP remover 230, deserializer 240, fast fourier transformer (FFT) 250 and CDM remove mapper 260.

RF receiver 210 comes to receive K subscriber signal from K terminal by reception antenna 270, and this K subscriber signal is converted to baseband signal.Analog to digital converter 220 is converted to the digital received signal with this baseband signal.CP remover 230 is removed CP from this digital received signal, and deserializer 240 will to have removed the digital received conversion of signals of CP be the parallel receive signal.FFT 250 is the frequency domain received signal by carrying out fast fourier transform with this parallel receive signal transformation.CDM goes the CDM sequence of mapper 260 by the delivery time of use user #k (wherein k is to the interior numeral of (K-1) scope from 0)

Come according to frequency domain received signal estimate vector At this moment, provide this vector by the transmission code element of user #k and the product of channel vector.

Can be with frequency domain received signal X by FFT 250 conversion _nBe expressed as equation 3.

Equation 3

${\stackrel{\‾}{X}}_n={[X_n\left(0\right)X_n\left(1\right)...X_n(N_f-1)]}^T$

$=\underset{k=0}{\overset{K-1}{\mathrm{\Σ}}}{s}^{\left(k\right)}{\stackrel{\‾}{H}}_n^{\left(k\right)}\⊗{\stackrel{\‾}{c}}_{i_n}^{\left(k\right)}$

${\stackrel{\‾}{H}}_n^{\left(k\right)}={[H_n^{\left(k\right)}\left(0\right)H_n^{\left(k\right)}\left(1\right)...H_n^{\left(k\right)}(N_f-1)]}^T$

Here,

The operation that expression be multiply by each element of another vector with each element of a vector, Expression is corresponding to the channel value of j subcarrier.

As shown in Figure 4, CDM goes mapper 260 to comprise: basic sequence descrambler 261, contrary discrete Fourier transform (DFT) (IDFT) 262, time delay domain extractor 263 and discrete Fourier transformer (DFT) 264.

With reference to figure 5, basic sequence descrambler 261 passes through as equation 4 expressedly with frequency domain received signal X _nEach element multiply by conjugation basic sequence c ₀Each unit usually basic sequence is carried out descrambling (step S21).

Equation 4

${\stackrel{\‾}{Y}}_n={\stackrel{\‾}{X}}_n\⊗{{\stackrel{\‾}{c}}_0}^{*}$

Here, Y _nThe output of expression basic sequence descrambler 261.

IDFT 262 is by carrying out the output Y of contrary discrete Fourier transform (DFT) with basic sequence descrambler 261 _nBe transformed to time delay domain signal g _n(step S22).Suppose, to the CDM of user #k sequence numbering i _n(k) distributed " k " and in identical time domain, transmitted K subscriber signal by same frequency.So, as shown in Figure 6, the channel latency profile (profile) of K subscriber signal appears at time delay domain signal g _nIn, and the time delay between two neighboring user is Δ τ.Time delay domain extractor 262 is extracted in delivery time #n to the territory that user #k distributes, and the data in the territory of being extracted are moved to initial point, with the time delay domain signal of output user #k

(step S23).DFT 264 is by carrying out discrete Fourier transform (DFT), with the time delay domain signal of user #k

Be transformed to desired subscriber signal (that is the signal of user #k) (step S24).

Next, will the influence of the multipath of the user with channel delay spread for other users be described with reference to figure 7 and Fig. 8.

Fig. 7 shows when using general CDM sequence, according to the time delay domain signal of the process of time, and Fig. 8 shows according to the present invention first example embodiment when the CDM sequence is carried out frequency hopping, according to the time delay domain signal of the process of time.

With reference to figure 7, the multipath with user #0 of channel delay spread has influence to the interval of user #1, makes and may disturb between the user.If in detection reference signal, occur disturbing, then the channel estimating performance deterioration of user #1.Particularly, when user #0 has bigger received power than user #1, the channel estimating performance variation.In the case, if even the elapsed time, also distribute identical CDM sequence continuously, then at time delay domain signal g to same subscriber ₀-g _N-1In, the multipath of user #0 has influence continuously for the interval of user #1, makes the continuous deterioration of channel estimating performance of user #1.

As shown in Figure 8, according to first example embodiment of the present invention,, make to have changed user adjacent one another are in the time delay domain signal along with the time changes each user's CDM sequence.As a result, the interference between can the randomization user.That is, at time delay domain signal g ₀The multipath of middle user #0 is influential for the interval of user #1, but at time delay domain signal g ₁And g _N-1In influential for the interval of user #2 and user #3 respectively.Correspondingly, the multipath of user #0 is not a user's of deterioration a channel estimating performance only, but a plurality of users' of deterioration channel estimating performance randomly.

Next, reference table 1 and table 2 are described the method that is used for distributing to the user different CDM sequences along with the time.Table 1 and table 2 show the CDM sequence allocating method of first example embodiment according to the present invention.

Table 1

	i 0	i 1	...	i N-1
					User #0	m 0(0)	m 0(1)	...	m 0(N-1)
User #1	m 1(0)	m 1(1)	...	m 1(N-1)
					...	...	...	...	...
User # (K-1)	m K-1(0)	m K-1(1)	m K-1(N-1)	m K-1(N-1)

Here, i _nThe CDM sequence numbering of expression delivery time #n, and m _k(n) expression is by the cyclic shift value of user #k in the transmission of delivery time #n place.Expressed as equation 5, m _k(n) have from 0 arbitrary cyclic shift value to (K-1).

Equation 5

$\∀n,m_k\left(n\right)\∈\{\mathrm{0,1,2},...,K-1\},0\≤k\≤K-1$

For the interference between the randomization user, two different users use different CDM sequences in a time domain.In addition, when two users used adjacent C DM sequence in a time domain, two users used CDM sequence not adjacent to each other.Shown in the example of table 2, different cyclic shift value are distributed to different user with terminal in the base station in a time domain, along with the time is carried out frequency hopping to described cyclic shift value, and the cyclic shift value after the user distributes frequency hopping.Then, along with the time is carried out frequency hopping to the CDM sequence.The frequency hopping pattern of cyclic shift is set, makes two users that in a time domain, used the adjacent cyclic shifted value in another time domain, use cyclic shift value not adjacent to each other.For example, when each user's frequency hopping pattern was set as shown in table 2ly, the cyclic shift value of user #0 and user #1 was adjacent one another are at delivery time #0 place, but the cyclic shift value of user #0 and user #1 is not adjacent to each other.

Table 2

	i 0	i 1
			User #0	0	3
User #1	1	5
			User #2	2	2
User #3	3	0
			User #4	4	4
User #5	5	1

The cyclic shift frequency hopping pattern is a pattern predetermined between base station and terminal.To the information of terminal notice about the cyclic shift frequency hopping pattern, and terminal and base station can be stored the cyclic shift frequency hopping pattern respectively when initial the access in the base station.In communication system, the cyclic shift frequency hopping pattern can be set by the upstream node of base station or base station.That is, base station or upstream node can be provided with CDM sequence and cyclic shift frequency hopping pattern thereof for a plurality of users.

Next, will example embodiment that use the cyclic shift frequency hopping pattern of first example embodiment according to the present invention to detection reference signal and ACK/NACK channel respectively be described with reference to figure 9 and Figure 10.

Fig. 9 shows the transfer structure of the detection reference signal of second example embodiment according to the present invention, and Figure 10 shows the transfer structure of the ACK/NACK channel of the 3rd example embodiment according to the present invention.

As shown in Figure 9, all users transmit detection reference signal by identical frequency range in identical time domain.Because detection reference signal uses the CDM sequence of the cyclic shift of having used table 1

So, distribute different CDM sequences to different user, thus identifying user.After each user's the characteristic of channel had been estimated by the use detection reference signal in the base station, the base station had the frequency range of the outstanding characteristic of channel to each user notification.Then, the user can transmit data by the frequency range by the base station notice.In addition, each user's received power can be measured by using detection reference signal in the base station, and estimates each user's timing error.

Therebetween, because the user can move in wireless communication system, so as shown in Figure 9, terminal periodic ground transmits detection reference signal.Then, the characteristic of channel can periodically be estimated by using detection reference signal in the base station.Described as reference table 1 and table 2, when periodically transmitting detection reference signal, base station and terminal be along with the time is carried out frequency hopping to cyclic shift value, makes interference between the randomization user.

With reference to Figure 10, the CDM sequence is used for reference signal (for example, pilot signal) and according to the ack/nack signal in the transfer structure of the 3rd example embodiment.That is, three OFDM code elements are used for reference signal, and four OFDM code elements are used for transmitting seven OFDM code elements and N _fACK/NACK code element in the structure of individual subcarrier.

Delivery time of reference signal the place CDM to go the output of mapper (260 among Fig. 2) be the channel estimating at place of corresponding delivery time

And the CDM at the delivery time of ACK/NACK place to go the output of mapper be ACK/NACK code element s ^(k)The product of channel estimating with corresponding delivery time place $y_n=s^{\left(k\right)}\widehat{{\stackrel{\‾}{H}}_n^{\left(k\right)}},n=\mathrm{0,2,4,6}.$ Then, the receiver of base station utilizes described channel estimating to go the output of mapper 260 to compensate to CDM, and obtains estimation for the ACK/NACK code element by the output after the compensation is sued for peace as equation 6 expressedly.

Equation 6

$\hat{s}=\frac{1}{4}\underset{j=0}{\overset{3}{\mathrm{\Σ}}}{y}_{2j}{\left(\widehat{{\stackrel{\‾}{H}}_{2j}^{\left(k\right)}}\right)}^{*}$

As shown in figure 10, base station and terminal can be by coming sequentially to distribute the CDM sequence to reference signal and ack/nack signal according to the order of delivery time, and use a cyclic shift frequency hopping pattern.Replacedly, base station and the terminal cyclic shift frequency hopping pattern that can be used for reference signal is set to be different from the cyclic shift frequency hopping pattern of ack/nack signal.As another alternative, any one application cycle displacement frequency hopping pattern that base station and terminal can be in reference signal and ack/nack signals.

Although four code elements having described in Figure 10 such as the ACK/NACK code element transmit same symbol s ^(k), but the cyclic shift frequency hopping pattern of first example embodiment can be applied to CQI (CQI) channel according to the present invention.When terminal when downlink channel information is transmitted in the base station, use the CQI channel.In the CQI channel, can transmit different code elements by all data blocks (that is OFDM code element) except reference signal.

As mentioned above, although in first to the 3rd example embodiment of the present invention, described K cyclic shift value be used for K user, but also can distribute K the cyclic shift value of from more than K cyclic shift value, extracting, and along with the time is carried out frequency hopping to it to K user.

In addition, base station and terminal can change the number of cyclic shift value according to cell environment or cell load, and below will describe this example embodiment.

In the 4th example embodiment of the present invention, the whole sequence that base station and terminal will be used for cyclic shift value is categorized as a plurality of groups, and the lowest difference between every group the cyclic shift value is set to greater than 1.For example, base station and terminal can be divided into all sequences of equation 5 two groups expressed as equation 7.Then, when the number of the cyclic shift value of using in the sub-district was less than or equal to (K/2), base station and terminal utilized first group sequence that cyclic shift value is set, and along with the time is carried out frequency hopping to described cyclic shift value.Because first group has the even number cyclic shift value, so the lowest difference between the cyclic shift value is 2.When the number of the cyclic shift value of using in the sub-district during greater than (K/2), base station and terminal utilize first and second groups sequence that cyclic shift value is set, and along with the time is carried out frequency hopping to described cyclic shift value.In the case, the lowest difference between the cyclic shift value is 1.

Equation 7

$\∀n,m_k\left(n\right)\∈\{\mathrm{0,2,4},...,K-1\},0\≤k\≤K/2-1$

$\∀n,m_k\left(n\right)\∈\{\mathrm{1,3,5},...,K-2\},K/2\≤k\≤K-1$

According to the 4th example embodiment, when according to time and a small amount of sequence of cell environment needs, distributing cyclic shift value the big group of the lowest difference between sequence makes and reduces interference between the user.

When the expansion of the time delay of radio channel according to the surrounding environment of sub-district and not simultaneously, under the situation of long time delay expansion, can be from (K/2) individual sequence of first group the distributing cyclic shift value; And hour prolonging under the situation of expansion, can be from K sequence the distributing cyclic shift value.

Figure 11 shows the figure that is used to explain the interference between the sub-district.

When first user 311 with the sub-district #0 of first base station 312 as home cell and second user 321 during as home cell, can receive the signal that is transmitted by second user with the sub-district #1 of second base station 322 in the #0 of sub-district.In the case, if first and second users have identical cyclic shift frequency hopping pattern, two users' that then can conflict continuously CDM sequence.Correspondingly, according to the present invention the base station of the 5th example embodiment and terminal shown in equation 8, table 3 and table 4, the cyclic shift frequency hopping pattern is set based on the sub-district under the user.

Equation 8

i _n＝[m _k(n)+H _c(n)]％K

Here, H _c(n) be illustrated in the cell code value that delivery time #n place distributes to sub-district #c, K represents user's maximum number, and % represents modulo operation.

Table 3

	i 0	...	i N-1
				User #0	[m 0(0)+H 0(0)]％K	...	[m 0(N-1)+H 0(N-1)]％K
User #1	[m 1(0)+H 0(0)]％K	...	[m 1(N-1)+H 0(N-1)]％K
				...	...	...	...
User # (K-1)	[m K-1(0)+H 0(0)]％K	...	[m K-1(N-1)+H 0(N-1)]％K

Table 4

	i 0	...	iN -1
				User #0	[m 0(0)+H 1(0)]％K	...	[m 0(N-1)+H 1(N-1)]％K
User #1	[m 1(0)+H 1(0)]％K	...	[m 1(N-1)+H 1(N-1)]％K
				...	...	...	...
User # (K-1)	[m K-1(0)+H 1(0)]％K	...	[m K-1(N-1)+H 1(N-1)]％K

According to the 5th example embodiment, even the user #k of the user #k of sub-district #0 and sub-district #1 uses identical m _k(n), because sub-district #0 and sub-district #1 have the different districts code, so two users also use different cyclic shift value.Correspondingly, locate to use different CDM sequences in the identical delivery time owing to belong to the user of different districts, so prevented the interference between the sub-district.

In first to the 5th example embodiment of the present invention, the fixing and frequency hopping cyclic shift of basic sequence has been described so that the CDM sequence is carried out frequency hopping.Yet, in the frequency hopping cyclic shift, can change basic sequence, the feasible interference that reduces between the sub-district along with the time.

In addition, the cyclic shift frequency hopping pattern of example embodiment can be applied to wherein that the user is positioned at the situation of different districts or sector according to the present invention, as is used for the reference signal of data channel of the coherent demodulation of data channel.To this example embodiment be described with reference to Figure 12 and Figure 13.

Figure 12 shows the example that is used in the method for the reference signal of cellular environment arranging data channel, and Figure 13 shows the example that the data of two sectors that are arranged in the same base place transmit.Figure 12 illustrates seven base stations in order to describe easily.

As shown in figure 12, different basic sequences is used in seven base stations, that is, and and basic sequence numbering u _nEach base station comprises three sectors, and use by utilizing different value to come identical basic sequence is carried out the sequence that cyclic shift obtains described three sectors.Distribute two different cyclic shift value although figure 12 illustrates, also can distribute a cyclic shift value to each sector to each sector.

With reference to Figure 13, user #1 transmits data in sectors, and distinguishes other users in user #1 and the sectors by frequency.Transmit data with subframe unit, and in each subframe twice transmission for the public reference signal of all users of sectors.User #2 transmits data in the β of sector, and the data transfer structure of sector β is similar to sectors.At this moment, as shown in figure 13, the interference between the user in sector does not exist.Yet the user #1 of sectors uses identical time/frequency resource with the user #2 of sector β, and use respectively utilize different value come to identical basic sequence carry out cyclic shift and the sequence that obtains as the reference signal.Here, when the time delay in the channel was big, the interference between the user may exist.Correspondingly, the 6th example embodiment of the present invention is by coming the interference between the randomization user along with time change cyclic shift value.At this moment, can be along with the time changes basic sequence.

Table 5 shows the example about the cyclic shift frequency hopping pattern and the basic sequence frequency hopping pattern of the reference signal of data channel.Reference table 5 as long as transmit reference signal, just changes basic sequence numbering u _nAnd cyclic shift, i.e. CDM sequence numbering i _n

Table 5

Although described the present invention in conjunction with being considered to the content of practical demonstration embodiment at present, but will understand, the invention is not restricted to the disclosed embodiments, but be intended to interior various modifications and the equivalence arrangement of spirit and scope that the present invention covers claims on the contrary.

Not only realize said method and equipment, and be intended on the contrary realize said method and equipment by the recording medium that is used to realize corresponding to the functional programs of example embodiment configuration of the present invention or be used to write down this program by example embodiment of the present invention.

Claims (16)

1. A method for transmitting an uplink signal in a terminal, the method comprising: multiplying the first transmission symbol by a first sequence for distinguishing the terminal from another terminal, and transmitting the first transmission symbol at a first transmission time; and multiplying the second transmission symbols by a second sequence for distinguishing the terminal from other terminals, and transmitting the first transmission symbols at a second transmission time different from the first transmission time, Wherein, the second sequence is different from the first sequence. 2. A method for generating an uplink signal in a terminal, the method comprising: hopping over time a sequence identifying the terminal as distinct from another terminal; and An uplink signal is generated by multiplying transmit symbols by a sequence of transmit times corresponding to the transmit symbols. 3. A method as claimed in claim 2, wherein said sequence corresponds to the product of a code and a base sequence for identifying said terminal from other terminals, and The step of frequency hopping the sequence includes frequency hopping the code over time. 4. The method of claim 2, wherein the sequence is a value generated by cyclic shifting a base sequence, and The step of frequency hopping the sequence comprises frequency hopping the cyclic shift over time. 5. The method of claim 2, wherein frequency hopping the sequence comprises frequency hopping the sequence over time based on the cell to which the terminal belongs. 6. A method for generating a sequence of uplink signals for a plurality of terminals including a first terminal and a second terminal in a communication system, the method comprising: setting a first sequence for the first terminal; setting the second sequence for the second terminal to be different from the first sequence; and The frequency hopping patterns of the first sequence and the second sequence are set according to the transmission time. 7. The method according to claim 6, wherein the step of setting a frequency hopping pattern comprises: setting the frequency hopping pattern such that the first sequence of first transmission times is different from the first sequence of second transmission times; and The frequency hopping pattern is set such that the second sequence of first transmission times differs from the second sequence of second transmission times. 8. The method of claim 6, wherein the step of setting a frequency hopping pattern comprises: The frequency hopping pattern is set such that when the first sequence is adjacent to the second sequence at the first transmission time, the first sequence is not adjacent to the second sequence at the second transmission time. 9. The method of claim 6, wherein the first sequence corresponds to a product of a base sequence and a code for the first terminal, and This second sequence corresponds to the product of the base sequence and the code for the second terminal. 10. The method of claim 9, wherein the first sequence is given by a code for the first terminal as a sequence generated by shifting the base sequence with a first cyclic shift, and The second sequence is given by a code for the second terminal as a sequence generated by shifting the base sequence with a second cyclic shift. 11. The method of claim 10, wherein the frequency hopping pattern is a pattern for frequency hopping the first and second cyclic shifts over time. 12. The method of claim 9, wherein the step of setting a frequency hopping pattern further comprises: Sets the pattern used to vary the base sequence over time. 13. The method of claim 6, wherein the step of setting a frequency hopping pattern comprises: The frequency hopping patterns of the first sequence and the second sequence are set based on the cell to which the first terminal belongs and the cell to which the second terminal belongs, respectively, according to the transmission time. 14. An apparatus for transmitting uplink signals in a terminal, the apparatus comprising: means for multiplying a first transmission symbol by a first sequence for distinguishing the terminal from another terminal, and for transmitting the first transmission symbol at a first transmission time; and means for multiplying the second transmission symbols by a second sequence for distinguishing said terminal from other terminals and for transmitting the first transmission symbols at a second transmission time different from the first transmission time, Wherein, the second sequence is different from the first sequence. 15. An apparatus for generating an uplink signal in a terminal, the apparatus comprising: means for hopping over time a sequence identifying said terminal as distinct from other terminals; and Means for generating an uplink signal by multiplying a transmit symbol by a sequence of transmit times corresponding to the transmit symbol. 16. An apparatus for generating a sequence of uplink signals for a plurality of terminals including a first terminal and a second terminal in a communication system, the apparatus comprising: means for setting a first sequence for a first terminal; means for setting the second sequence for the second terminal to be different from the first sequence; and Means for setting frequency hopping patterns of the first sequence and the second sequence according to transmission time.

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