CN1964217B - A multicarrier MIMO system and its communication method - Google Patents

A multicarrier MIMO system and its communication method Download PDF

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CN1964217B
CN1964217B CN 200510115624 CN200510115624A CN1964217B CN 1964217 B CN1964217 B CN 1964217B CN 200510115624 CN200510115624 CN 200510115624 CN 200510115624 A CN200510115624 A CN 200510115624A CN 1964217 B CN1964217 B CN 1964217B
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user
signal
corresponding
scheduling
carrier
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CN1964217A (en
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潘振岗
陈岚
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株式会社Ntt都科摩
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Abstract

The provided multi-carrier MIMO communication system comprises: a sending end to send data frame included at least channel estimation signal and user data; and at least one receiving end to receive data frame and generate relative feedback signal and analyze data user. Wherein, the sending end generates scheduling information contained target user and code flow and appointed emission beam according to said feedback signal for adaptive user scheduling. This invention can provide maximal channel capacity, and reduces cost and algorithm complexity.

Description

多载波MIMO系统及其通信方法 A multi-carrier MIMO system and a communication method

技术领域 FIELD

[0001] 本发明涉及到使用多输入多输出天线系统的无线通信技术,特别是涉及一种多载波MIMO通信系统及其通信方法。 [0001] The present invention relates to the use of multiple input multiple output antenna system wireless communication technology, particularly to a multi-carrier MIMO communication system and a communication method.

背景技术 Background technique

[0002] 未来的无线通信系统需要支持非常高速率的数据业务,比如说视频会议、视频点播、交互视游戏等等。 [0002] Future wireless communication system needs to support very high speed data services, such as video conferencing, video on demand, interactive visual games. 根据ITU-R M1645文件中提到的要求:高速无线业务(High Mobility),需要支持最高到IOOMbps的速率,而对于低速(LowMobility)或者固定无线(Fixed Wireless)业务,更需要达到IGbps的速率。 According to ITU-R M1645 requirements mentioned in the document: high-speed wireless service (High Mobility), needs to support up to IOOMbps rate, while for low-speed (LowMobility) or a fixed wireless (Fixed Wireless) service, the need to achieve a rate of IGbps.

[0003] 无线通信中一个信道的速率等于该信道的频谱带宽与其所应用技术的频谱效率的乘积。 [0003] In a wireless communication channel a rate equal to the product of spectral efficiency and spectral bandwidth of the art it is applied channel. 为了提高速率,需要提高它的频谱带宽或者所应用技术的频谱效率。 In order to increase the rate, it is necessary to increase the spectral efficiency of the bandwidth or spectrum technique is applied. 然而,频率资源是有限的,所以不可能无限制地通过增加频谱带宽来增加通信速率,最好方法是增大所应用技术的频谱效率。 However, frequency resources are limited, it is impossible to indefinitely increase the communication rate by increasing the spectral bandwidth, the best way is to increase the spectral efficiency of the applied technology.

[0004] 通常,可以通过两个途径来提高频谱效率。 [0004] In general, the spectral efficiency can be improved in two ways. 一种途径是通过物理层的技术如先进的编码技术、信号处理技术等来提高链路级的频谱效率。 One approach is to improve the link level spectrum efficiency by physical layer technologies such as advanced coding technologies, signal processing techniques and the like. 另一种途径是通过高层的控制达到更灵活的资源分配来实现系统级的频谱效率。 Another way is to implement system-level spectrum efficiency to achieve a more flexible resource allocation through high-level control. 多输入多输出技术(Multiple Input Multiple Output,ΜΙΜΟ)和基于信道用户调度方法(ChanneI-Aware User Scheduling)是相应的两种实现该目标的方法。 MIMO technology (Multiple Input Multiple Output, ΜΙΜΟ) and a channel user scheduling method (ChanneI-Aware User Scheduling) is based on the two corresponding method to achieve this goal. 随机波束成形是用来改善用户调度系统性能的一种方法, 其可以比较有效地将这两个不同协议层的方法进行联合,从而实现系统性能的最优化。 Random beamforming is used to improve the performance of a method for scheduling a user system, which may be more effective method for the two different protocol layers of the joint to optimize system performance. 然而,现代的通信系统都基于蜂窝结构,基本的通信模式是蜂窝中的一个基站同时为很多个用户(Mobile Station,MS)提供服务,这就涉及到多用户的接入问题-多址方式(Multiple Access)。 However, modern communication systems are based on the honeycomb structure, the basic communication mode is a cellular base station simultaneously serve a number of users (Mobile Station, MS), which involves the problem of multi-user access - multiple access ( Multiple Access). 传统的接入方式有FDMA、TDMA以及CDMA,它们都是基于电路交换(Circuit Switch)原则的,即每个用户都给分配了一个固定的频带(FDMA)、时隙(TDMA)或扩频码(CDMA)。 The traditional way has access FDMA, TDMA and CDMA, they are based on circuit switched (Circuit Switch) principle, i.e. each user is allocated a fixed gave bands (FDMA), time slot (TDMA) or a spreading code (CDMA).

[0005] 以GSM为例,基站在一条200K的信道内以固定时隙分配的方法把一个帧的8个时隙分配给8个用户进行通信。 [0005] For example in GSM, the base station in a 200K channel at a fixed time slot allocation methods of the eight time slots of a frame is assigned to eight users to communicate. 这种方法的优点就是可以保证通信业务的时延特性,比较适合于语音通信这类对时延比较敏感的业务。 The advantage of this method is that the traffic can be guaranteed delay characteristics, such more suitable for voice communication service sensitive to delay. 其缺点是固定资源分配没有考虑到用户通信时的无线信道状况。 The disadvantage is that when the wireless channel resource allocation without considering fixed subscriber communication. 由于无线信道的变化非常大,如果用户在其信道处于深衰落的时候分配到了信道的话,将导致系统性能的损失。 Due to changes in the wireless channel is very large, if the user at the time of its assignment in a deep fading channel to channel, it will result in a loss of system performance.

[0006] 未来的通信系统将以数据业务为主,对时延的要求不是太严格。 [0006] future communication system will be data-based business, the requirements of the delay is not too strict. 这样的话可以采用分组交换(Packet Switch)的多址方式。 In this case multiple access packet switched (Packet Switch) may be employed. 采用分组交换时,基站需要实时地把信道分配给不同的用户,这里叫作用户调度(User kheduling)。 When using packet switching, in real time, the base station needs to allocate channels to different users, here called the scheduling of users (User kheduling). 目前有两种最基本的用户调度方法被应用到无线通信系统中。 There are two basic user scheduling method is applied to a wireless communication system. 一种是循环(Round Robin)调度,即信道通过循环的方式分配给所有的用户。 One is cyclic (Round Robin) scheduling, i.e., the channel assigned to all users through a cyclic manner. 这种方法的效果和电路交换一样,保证了时延特性和用户间的公平性,但没有提高性能。 The effect of this method and circuit switched as to ensure fairness among users and delay characteristics, but does not improve performance. 另一种用户调度技术是信道感知调度(Charmel-aware kheduling),其可以根据用户的信道衰落情况hk(单天线系统中,它是一个复数标量),动态地将当前信道的使用权分配给具有最大载波干扰比(可以简单的认为是maX|hk|)的用户。 Another user scheduling technique is a channel aware scheduling (Charmel-aware kheduling), which may be fading hk user channel (single antenna systems, it is a complex scalar), to dynamically assign a current right to use the channel to having the maximum carrier to interference ratio (simply considered maX | hk |) users. 这样的话,系统的性能可以得到很大的提高。 In this case, the system performance can be greatly improved. 通过最大载干比调度得到的性能增益叫作多用户分集(Multiuser Diversity)。 Performance gain by maximum carrier to interference ratio scheduling obtained is called multi-user diversity (Multiuser Diversity).

[0007] 但是,由于信道感知调度是根据信道的状况来决定公共信道的分配,其对信道状况的依赖性比较大。 [0007] However, since the channel aware scheduling is determined according to the allocated common channel conditions of the channel, which is dependent on the channel conditions is relatively large. 这样,在一些特殊的信道状况下,系统的性能就会有显著的下降。 Thus, in some specific channel conditions, system performance will be significantly decreased.

[0008] 图1(a)和1(b)给出了当基站(发送端)具有一根发送天线并且具有两个用户(接收端)时的系统结构图。 [0008] FIG. 1 (a) and 1 (b) shows when the base station (transmitting side) having a transmitting antenna and two users (receiver) of the system configuration of FIG. 在该系统中,信道感知调度是根据信道的状况来决定公共信道的分配。 In this system, the channel aware scheduling is determined common channel is allocated according to the state of the channel.

[0009] 在图2中,(a)表示在信道状况良好时信道增益的状况;(b)表示信道中存在视线路径(Line of Sight, LoS)时信道增益的状况;(c)表示系统处于慢衰减时信道增益的状况。 [0009] In FIG. 2, (a) shows a condition when the channel gain is good channel; (b) indicates the presence of line of sight path (Line of Sight, LoS) when the channel gain of the conditions in the channel; (c) the system is in status of the channel gain of slow decay.

[0010] 在图2中,曲线1表示用户1的随时间变化的信道增益曲线,曲线2表示用户2的随时间变化的信道增益曲线,虚线表示当前系统随时间变化的平均信道增益曲线。 [0010] In FIG. 2, curve 1 represents the time a user a change in channel gain curve, the curve 2 represents the time the user 2 changes the channel gain curve, a broken line represents the current system time varying average channel gain curve. 从(a) 中可以看出,在不同的时刻,系统根据用户1和用户2的信道增益来决定公共信道的分配, 即在O-、时段分配给用户1、trt2时段分配给用户2等等,分别在时间轴上用“1”、“2”表示。 As can be seen in (a), at different times, the system determines the common channel is allocated according to a user 1 and user 2 channel gain, i.e., allocated to a user 1, user 2 is assigned to the period TRT2 in O-, period, etc. , respectively, with "1" on the time axis, "2". 最后,系统的信道增益则是曲线1和曲线2的上包络,求其平均得到虚线所示的系统平均信道增益曲线。 Finally, the channel gain of the system is the curve 1 and curve 2 envelope, the values ​​are averaged to obtain the system shown in dotted line average channel gain curve.

[0011] 比较(a)和(b)可以得知,当信道中存在一个视线路径时,由于该视线路径将减小信道系数的波动,其导致可实现的系统平均信道增益降低。 [0011] Comparison of (a) and (b) can be known, when there is a line of sight path channel, since this will reduce the line of sight path fluctuation of channel coefficients, which causes the system to average channel gain reduction can be achieved. 并且,从(b)和(C)中可以看出(括号所指示的时段),当系统衰落比较慢时,传输时延就会比较大。 Then, from (b) and (C) can be seen (the period indicated in parentheses), when the system fading is slow, the transmission delay will be relatively large.

[0012] 为解决这个问题,P. Viswanath, DNC Tse以及R. Laroia等人提出了一种解决方法(#1¾ "Opportunistic beamforming using dumb AnntennasIEEETrans. Infor. Theory, Vol. 48,No. 6,pp. 1277-1294. June. 2002,下称“参考文献1,,)。 [0012] In order to solve this problem, P. Viswanath, DNC Tse and R. Laroia, who proposed a solution (# 1¾ "Opportunistic beamforming using dumb AnntennasIEEETrans. Infor. Theory, Vol. 48, No. 6, pp. 1277-1294. June. 2002, hereinafter referred to as "References 1 ,,).

[0013] 在该方法中,假设基站安装有ητ根天线,并且每个用户是一根接收天线的话, [0013] In this method, it is assumed the base station antennas are mounted ητ, and each user is a receiving antenna, then,

用户的信道是一个向量eC〜xl在发射前,将数据信号乘上一个%维随机复数向量 User channel is a vector eC~xl prior to transmission, the data signals by one percent dimensional random complex vector

ο ο

WG Cnrxl,然后,将该数据信号从所有的ητ根天线发射出去。 WG Cnrxl, then the data signal is transmitted from all antennas ητ. 这时,每个用户检测到信道增益实际上是一个结合了真实信道和发射向量的等效信道增益C^vi =|h〗w|。 In this case, each user channel gain detected is actually a combination of true channel and transmit the equivalent channel gain vector C ^ vi = | h〗 w |. 每个用户把其 Each user put it

检测到的等效信道增益反馈给基站,进而,基站将信道分配给具有最大等效信道增益的用户。 The detected equivalent channel gain to the base station, in turn, the base station assigning a channel to a user having the maximum equivalent channel gain.

[0014] 例如,在图Ia和图Ib中,具有最大等效增益的用户正好位于由发射向量hk形成的发射波束的主瓣内。 User [0014] For example, in FIGS. Ia and Ib having the maximum equivalent gain is just within the main lobe of the transmit beam formed by the transmit vector hk. 这样的话,通过改变随机复数向量W,就可以改变等效信道增益的统计特性(例如相关特性、时变特性等),使其满足用户调度的要求。 In this case, by varying the random complex vector W, you can change the statistical properties equivalent channel gain (e.g. correlation characteristics, time-varying characteristics, etc.), to meet the requirements of the user schedule.

[0015] 系统的性能在很大程度上也取决于随机向量的概率分布密度函数fpdf (W)。 Performance [0015] system is also largely dependent on random probability density function vector fpdf (W). 上述方法是在窄带系统中,平坦衰落信道情况下给出的。 In the above mentioned process is a narrowband system, a flat fading channel conditions given. 然而,目前的系统通常为宽带系统,有很强的频率选择性衰落,因此直接采用上述方法不可能形成某个方向上的波束。 However, the current system is a broadband system typically has a strong frequency selective fading, it is impossible to form a beam in a certain direction directly by the above method. 同时,根据多载波调制技术,信号带宽可以被分成很多子载波,每个子载波会经历一个平坦衰落信道。 Meanwhile, multi-carrier modulation technique, the signal bandwidth can be divided into many subcarriers, each subcarrier may experience a flat fading channel. 这样的话,针对每个子载波可以实现随机波束成形。 In this case, molding can be achieved for each subcarrier random beamforming. 用户可以通过测量在每个子载波上的等效信道增益来竞争每个子载波。 Users can compete to each sub-carrier by measurements on each subcarrier equivalent channel gain. [0016] 图3给出了这种情况下发送端的信号处理的示意图。 [0016] FIG. 3 shows a schematic of the transmitting side signal processing in this case. 可以看到,每个子载波上的数据Cli都要乘上一个随机产生的向量wn,η = 1,...,Nc形成输入到不同天线的频域信号。 It can be seen Cli data on each subcarrier vector wn to be multiplied by a randomly generated, η = 1, ..., Nc antennas forms an input to a different frequency domain signal. 不同天线上的频域信号再经过IFFT形成时域信号。 Frequency domain signal on different antennas and then the time domain signal through IFFT formed. 该时域信号在加上循环前缀后通过相应的天线发射出去。 The time domain signal after a cyclic prefix adding emitted by the respective antenna. 从图3上我们可以看到,对这个系统,一共需要产生Nc个ητ维的随机向量,并且需要进行ητ次IFFT。 We can see from Figure 3, this system needs a total generating a random vector of Nc ητ-dimensional, and require ητ times IFFT. 这将产生以下几个问题: This produces the following questions:

[0017] 1.随机数的产生一般通过一些伪随机的方法。 Generating [0017] 1. random numbers typically by a pseudo-random number method. 并且这里需要的都是一些具有时间相关特性的随机序列。 And here are some random sequences required time-correlation characteristics. 产生这么多的随机数需要很多相应的伪随机发生器,导致硬件资源的增加或者算法复杂度的提高; Random number generating so much need a lot corresponding pseudo-random generator, resulting in an increase or improve the algorithm complexity of hardware resources;

[0018] 2.这个系统的性能应该取决于所有随机向量的联合概率密度函数fpdf (Wl,..., wNc)。 Performance [0018] 2. The system should depend on all the joint probability density function of the random vector fpdf (Wl, ..., wNc). 原则上,这个函数是有一定的优化空间的,但去有目的的优化有非常多变量的函数,在数学上有非常大的难度; In principle, this function is a certain optimization space, but to have the purpose of optimizing the function has a lot of variables, there is great difficulty in mathematics;

[0019] 3.这个方案需要和发送天线数一样多的IFFT的次数,算法的复杂度是ο(ητ · Nc · LogNc),比较高。 [0019] 3. The program number and the number of transmission antennas as much IFFT needs, complexity of the algorithm is ο (ητ · Nc · LogNc), is relatively high.

[0020] 因此,需要提供一种能够克服上述缺点的通信系统及其通信方法。 [0020] Therefore, a need to provide a communication system and a communication method to overcome the above disadvantages. 发明内容 SUMMARY

[0021] 本发明的目的在于,提供一种多载波MIMO通信系统。 Objective [0021] The present invention is to provide a multi-carrier MIMO communication system.

[0022] 本发明的另一目的在于,提供一种用于上述多载波MIMO通信系统的通信方法。 Another object of the [0022] present invention is to provide a communication method of the multi-carrier MIMO communication system.

[0023] 根据本发明的第一方面,本发明多载波MIMO通信系统,其包括用于发送至少具有信道估计信号和用户数据的数据帧的发送端,以及用于接收发送端发送的数据帧、产生相应的反馈信号并还原用户数据的至少一接收端。 [0023] According to a first aspect of the present invention, the present invention is a multi-carrier MIMO communication system, comprising means for transmitting at least the channel estimation signal transmitting terminal data frame and user data, and for receiving a data frame sending end, generating a feedback signal corresponding to the user data and restore the at least one receiving terminal. 其中,该发送端包括:双工器组和位于其上的发送天线,用于发送数据帧,并接收来自接收端的反馈信号;多载波MIMO调度器,用于根据该反馈信号产生调度信息;多载波MIMO数据处理器,用于根据调度信息选择需要调度的用户,并将所选择用户的数据形成对应的多载波发射信号。 Wherein the transmitting end comprises: a duplexer group and the transmit antennas located thereon, for transmitting data frames, and receives a feedback signal from the receiving end; multi-carrier MIMO scheduler for generating scheduling information according to the feedback signal; multiple carrier MIMO data processor according to scheduling information for scheduling the user select the user and the selected data is formed corresponding to the multi-carrier transmitting signals. 该接收端包括:双工器组以及位于其上的接收天线,用于接收来自发送端的数据帧,并发送用户反馈信息;多载波接收信号处理器,用于根据数据帧产生用户反馈数据和还原用户数据;反馈信息处理器,用于将用户反馈信息转化成反馈信号。 The receiving terminal comprises: a duplexer group and positioned on the receiving antenna, for receiving a data frame from the sender, and transmits the user feedback information; multicarrier receiver signal processor for generating the frame data according to the user feedback data and restore user data; feedback information processor for converting the user feedback information into the feedback signal.

[0024] 根据本发明第二方面,本发明多载波MIMO通信系统的通信方法,其包括以下步骤: [0024] According to a second aspect of the present invention, a communication method for multi-carrier MIMO communication system according to the present invention, which comprises the steps of:

[0025] (a)在接收端,根据发送端的发送天线与接收端的接收天线之间的信道衰落状况产生反馈信号,并将该反馈信号反馈给发送端; [0025] (a) at the receiving side, generating a feedback signal according to the channel fading condition between the transmitting side transmitting and receiving antennas of the receiving end, the feedback signal and the feedback to the transmitting end;

[0026] (b)在发送端,接收该反馈信号,根据该反馈信号产生调度信息; [0026] (b) at the sending end, receiving the feedback signal, generating a feedback signal based on the scheduling information;

[0027] (c)在发送端,根据调度信息将所调度用户的数据形成对应的多载波发射信号,通过对应的发送天线将该多载波发送信号发送出去;以及 [0027] (c) at the transmitting end, according to the scheduled user scheduling information data is formed corresponding to the multi-carrier transmitting signals, transmitted through the corresponding transmission antenna transmits the multicarrier signal;

[0028] (d)在接收端,根据接收的发射波束还原用户数据。 [0028] (d) at the receiving end, to restore the user data based on the received transmit beam.

[0029] 与现有技术相比,本发明的多载波MIMO通信系统及其通信方法所提供的信道容量高于现有的多载波MIMO通信方法所能提供的信道容量。 [0029] Compared with the prior art, the channel capacity of a multi-carrier MIMO communication system and a communication method of the present invention there is provided a channel capacity than a conventional multi-carrier MIMO communication method can be provided. 除此之外,本发明的多载波MIMO 通信系统由于采用了一种新的多载波波束成形器和随机向量产生器,其可以克服现有现有多载波MIMO通信系统需要很多伪随机发生器来产生大量随机数的缺点,同时可以优化随机向量的联合概率密度函数,并且算法的复杂度也较低。 In addition, a multi-carrier MIMO communication system according to the present invention thanks to a new multi-carrier and the random beamforming vector generator, which can overcome the conventional multi-carrier MIMO communication system needs a lot of pseudo-random generator disadvantage of generating a large number of random numbers, and can optimize the joint probability density function of random vectors, and the complexity of the algorithm is also low. 附图说明 BRIEF DESCRIPTION

[0030] 为进一步解释本发明,请参考以下描述的附图: [0030] The invention is further explained, the following description refer to the drawings:

[0031] 图1(a)和(b)为当基站具有一根发送天线并且具有两个用户时的系统结构图。 [0031] FIG. 1 (a) and (b) a system configuration view of a transmission having two antennas and the base station when the user.

[0032] 图2(a)为表示在信道状况良好时信道增益的状况;(b)表示信道中存在视线路径时信道增益的状况;(c)表示系统处于慢衰减时信道增益的状况。 [0032] FIG. 2 (a) shows a good condition when the channel gain conditions in the channel; indicates the presence of line of sight path channel channel gain condition (b); (c) the system is in condition of slow decay time channel gain.

[0033] 图3为传统MIMO系统中实现多载波随机波束成形的装置的示意图。 [0033] FIG. 3 is a schematic diagram of a multi-carrier means conventional random beamforming MIMO system implementation.

[0034] 图4为本发明基于随机发射波束成形的多载波MIMO通信系统的框架图。 [0034] FIG 4 FIG frame multi-carrier MIMO communication system based on random beamforming of the present invention transmit.

[0035] 图5为图4所示的多载波MIMO通信系统的用户调度的流程图。 [0035] FIG. 5 is a view of a multi-carrier MIMO communication system shown in a flowchart of user scheduling.

[0036] 图6为本发明多载波MIMO通信系统所采用的帧结构的示意图。 [0036] FIG. 6 is a schematic view of a frame structure a multi-carrier MIMO communication system used in the present invention.

[0037] 图7进一步描述了本发明的MIMO通信系统的发送端10的结构示意图。 [0037] FIG. 7 is further described with structural diagram of the transmitting end of the MIMO communication system 10 of the present invention.

[0038] 图8为图7所示的多载波波束成形器114的具体结构图。 [0038] FIG 8 is shown in FIG. 7, a specific configuration of a multi-carrier beamformer 114 of FIG.

[0039] 图9为发送端10的发送射频链路组的结构示意图。 [0039] FIG. 9 is a schematic view of a radio frequency transmission link 10 transmits end group.

[0040] 图10为本发明发送端10的双工器组130的示意图。 [0040] FIG 10 a schematic view of the duplexer group 130 of the terminal 10 transmits the present invention.

[0041] 图11进一步描述了本发明的MIMO通信系统的接收端20的结构示意图。 [0041] FIG. 11 is further described with structural diagram of a receiving end of the MIMO communication system 20 of the present invention.

[0042] 图12至图14为实际信道状况下不同调度方法的性能比较图。 [0042] FIGS. 12 to 14 are actual channel performance comparison of different scheduling methods under FIG channel conditions.

具体实施方式 Detailed ways

[0043] 下面就结合附图描述本发明。 [0043] Below the invention is described in conjunction with the accompanying drawings.

[0044] 图4为本发明多载波MIMO通信系统的框架图,其中,该MIMO通信系统包括一发送端10 (基站)以及多个接收端20 (用户)。 [0044] FIG 4 FIG frame multi-carrier MIMO communication system according to the present invention, wherein the MIMO communication system 10 includes a transmitting side (base station) and a plurality of receiving terminal 20 (user). 图5为图4所示MIMO通信系统的用户调度的流程图。 FIG 5 is a flow diagram of user scheduling MIMO communication system shown in FIG. 4. 图6为本发明多载波MIMO通信系统所采用的帧结构的示意图。 A schematic view of a frame structure of a multi-carrier MIMO communication system used in the present invention. FIG. 6.

[0045] 如图4-6所示,发送端10具有多载波MIMO数据处理器110、多载波MIMO调度器120、双工器组130以及ητ根发送天线。 As shown in [0045] FIG. 4-6, 10 having a multi-carrier MIMO data processor 110, multi-carrier MIMO scheduler 120, a duplexer group 130 and ητ transmission antennas transmitting end. 每个接收端20具有多载波接收信号处理器210、反馈信息处理器220、双工器组230以及ηκ根接收天线。 Each terminal 20 has a receiver 210, a feedback information processor 220, a duplexer group 230 and receiving antennas ηκ multicarrier reception signal processor. 其中,每个接收端20的接收天线数量可以不同。 Wherein the number of the receiving antennas 20 of each receiving terminal may be different. 该帧结构包括:信道估计时隙、信道反馈时隙以及数据传输时隙,并且可以根据系统需求设置其他的时隙,这里是为了方便说明而简化。 The frame structure comprising: a channel estimation slot, a channel feedback slot and a data transmission slot, and may be set according to system requirements other time slot, here simplified for convenience of explanation.

[0046] 调度信息获取过程 [0046] The scheduling information obtaining process

[0047] 从图6中可以看出,发送端10在发送用户数据信号之前,首先会通过双工器组130 自ητ根发送天线以发射波束的形式,向接收端20发送信道估计信号。 [0047] As can be seen from Figure 6, before transmitting side 10 transmits the user data signal, from the first will ητ transmission antennas through the duplexer group 130 in the form of transmit beams to the receiving terminal 20 transmits the channel estimation signal.

[0048] 假设发送端10的发送信号是一个ητ维的复数向量X e C”,每个接收端20接收 [0048] Suppose the transmission signal terminal 10 is a ητ dimensional complex vector X e C ", 20 receiving each of the receiving terminal

到的是一个ηκ维的复数向量y AGC"R,发送端10和接收端20之间存在一个叫父叫维的 To a ηκ dimensional complex vector y AGC "R, called the Father exists a dimension between the transmitting end and a receiving end 20 10

信道衰落矩阵: Channel fading matrix:

[0049] [0049]

Figure CN1964217BD00101

[0050] 其中,h。 [0050] wherein, h. 表示发迭端10第i根发送天线和接收端20第j根天线之间的信道传输特性(其中k表示第k个用户)。 10 represents the i-th transmission antenna and the channel sent Diego end transmission characteristics between the j th antenna 20 receiving end (where k represents the k th user).

[0051] 则,系统的传递函数可以表示为: [0051] is, the transfer function can be expressed as:

[0052] yk = HkXk+Uk [0052] yk = HkXk + Uk

[0053] (2) [0053] (2)

[0054] k = 1,. ..,K [0054] k = 1 ,. .., K

[0055] 其中h 是一个ηκ维的复数向量,代表接收端20的白噪声。 [0055] where h is a complex ηκ-dimensional vector representing the received white noise 20 terminal.

[0056] 这样,对于每个接收端20,其知道确切的信道衰落状况,该信道衰落状况实际上结合了真实信道衰落状况和发送端的随机复数向量。 [0056] Thus, for each receiving end 20, it knows the exact channel fading conditions, the channel fading condition is actually a combination of true channel fading condition and the random complex vector transmitting end. 根据该信道衰落状况,每个接收端20通过多载波接收信号处理器210可以对其进行处理,从而获得用户反馈信息,并将其传送给反馈信息处理器220。 According to the channel fading condition, each of the receiving terminal 20 is processed by the signal processor 210 receives a multi-carrier may be made thereto, so as to obtain the user feedback information, and transmits it to the feedback information processor 220.

[0057] 反馈信息处理器220将接收到的用户信息进行处理,将其转化成适合MIMO通信系统的反馈信号(射频信号)。 [0057] The feedback information processor 220 stores the received user information is processed, converted into a feedback signal (RF signal) for MIMO communication system. 该反馈信号通过接收端20的天线经反馈信道反馈给发送端10。 The feedback signal received through the antenna terminal 20 via a feedback channel 10 back to the transmitting end.

[0058] 发送端10的天线接收该反馈信号后,将其传送到多载波MIMO调度器120。 After the [0058] transmitting end of the antenna 10 receives the feedback signal, which is transmitted to the multi-carrier MIMO scheduler 120. 多载波MIMO调度器120根据该信号产生调度信息,并利用所产生的调度信息控制多载波MIMO数据处理器110的操作,从而使MIMO通信系统达到最大系统容量时的调度状态。 Multi-carrier MIMO scheduler 120 produces scheduling information according to the signal, and the scheduling information using the generated multi-carrier operation control MIMO data processor 110, so that scheduling MIMO communication system has reached a state of maximum system capacity. 即,根据调度信息进行最优化的用户调度。 That is, optimized user scheduling according to the scheduling information.

[0059] 上述获得信道衰落状况的方法是通过利用信道估计信号(即导频信号)而进行, 其在数据帧中插入信道估计信号,接收端20根据该信道估计信号获得发送端10与接收端20之间的信道衰落状况,进一步由多载波接收信号处理器210对信道衰落状况处理后所获得用户反馈信息。 [0059] The obtained channel method fading condition is estimated signal (i.e. pilot signal) by using the channel is performed, which is inserted into a channel in the data frame estimate signal receiving end 20 signal obtained transmitting terminal 10 and the receiving end based on the channel estimation channel fading condition between the 20, the signal processor further receives multicarrier channel fading condition 210 pairs of post-processing to obtain user feedback information.

[0060] 然而,本发明中也可以利用信道盲估计方式获得信道衰落状况。 [0060] However, the present invention may also be obtained using the channel fading conditions Channel Estimation manner. 即,数据帧中不需要设置信道估计时隙,接收端20在接收到发送端10发送的数据同时,通过信道盲估计获得信道衰落状况,然后由多载波接收信号处理器210对信道衰落状况处理后所获得用户反馈信息。 That is, the data frame is unnecessary to provide a channel estimation slot, the receiver 20 receives the data sender 10 transmits at the same time, by blind channel estimation to obtain the channel fading condition, and then processed by the multi-carrier receive signal processor 210 of the channel fading conditions user feedback information obtained. 此时可以避免信道估计信号的插入所造成的频谱资源的浪费。 At this time, to avoid waste of spectrum resources for channel estimation inserted signal caused.

[0061] 图7进一步描述了本发明的MIMO通信系统的发送端10的结构示意图。 [0061] FIG. 7 is further described with structural diagram of the transmitting end of the MIMO communication system 10 of the present invention. 图8为图7所示的多载波波束成形器114的一种具体结构图。 FIG 8 is a multi-carrier beamformer shown in FIG. 7 is a concrete configuration 114 of FIG. 图9为发送端10的发送射频链路组的结构示意图,图10为本发明发送端10的双工器组130的示意图。 FIG 9 is a schematic view of a radio frequency transmission link transmitting end group 10, FIG. 10 is a schematic of the duplexer group 130 of the transmission side 10 of the present invention. 图11进一步描述了本发明的MIMO通信系统的接收端20的结构示意图。 FIG 11 is further described with structural diagram of a receiving end of the MIMO communication system 20 of the present invention. 在图7和图11中采用分层时空信号处理方式进行MIMO通信的描述。 MIMO communication is described a layered space-time signal processing in FIG. 7 and FIG. 11. 对于信号处理而言,同样可以采取其他现有技术所揭示的信号处理方法和装置来执行,例如空时编码方式。 For signal processing, the signal processing may take the same method and apparatus disclosed in other prior art is performed, for example, space-time coding mode.

[0063] 发送端10[0064] 在图7中,该发送端10包括多载波MMO数据处理器110、多载波MIMO调度器120、 双工器组130以及ητ根发送天线。 [0063] The sender 10 [0064] In FIG. 7, the transmission side 10 comprises a multi-carrier MMO data processor 110, multi-carrier MIMO scheduler 120, a duplexer group 130 and ητ transmission antennas.

[0065] 该多载波MIMO调度器120包括接收射频链路组123、ΜΙΜ0接收信号处理器122以及调度器121。 [0065] The multi-carrier MIMO scheduler 120 includes a receiving RF link group 123, ΜΙΜ0 reception signal processor 122 and a scheduler 121. 其中,接收射频链路组123具有与发送天线对应数量的接收射频链路,用于将接收到的反馈信号转化为相应的码流。 Wherein, the receiving RF link group 123 has a receiving RF link with a corresponding number of transmit antennas, the feedback signal for conversion into a corresponding received code stream. MIMO接收信号处理器122将该转化的码流进行空时信号处理,获得相应的调度信息,该调度信息包括:所要调度的用户、每个用户所支持的码流、发送每个码流的指定子载波上的指定发射波束。 MIMO signal processor 122 receives the code stream transformed space-time signal processing, to obtain the corresponding scheduling information, the scheduling information comprises: a user to be scheduled, each supported user streams, each stream transmitted specify Specifies the transmit beams onto the subcarriers. 调度器121利用该调度信息控制多载波MIMO数据处理器110的信号处理。 The scheduler 121 controls the multi-carrier MIMO data processor 110 signal processing using the scheduling information.

[0066] 该多载波MIMO数据处理器110包括用户选择器111,多个并行排列的分流器112, 载波波束分配器113,多个并行排列的多载波波束成形器114,加法器组118、循环前缀器组115,发送射频链路组116以及随机向量产生器117。 [0066] The multi-carrier MIMO data processor 110 includes a user selector 111, a plurality of splitter 112 arranged in parallel, the carrier beam allocator 113, a plurality of multi-carrier arranged in parallel beamformer 114, an adder group 118, loop group prefix 115, 116 transmit RF link group 117 and a random vector generator.

[0067] 其中,在调度信息的控制下(根据调度信息中的“所要调度的用户”),用户选择器111用于选择所要调度的用户,这里数量表示为ns个,并输出相应的用户数据。 [0067] wherein, under the control of the scheduling information (according to the scheduling information "to be scheduled user"), the user selector 111 for selecting a desired schedule of the user, where the number is represented as ns th, and outputs the corresponding user data .

[0068] 在调度信息的控制下,nS个分流器112被选中来对所调度的nS个用户的用户数据进行分流处理,即,根据调度信息中的“每个用户所支持的码流”,将所调度的nS个用户的用户数据分成L个码流输出。 [0068] Under the control of the scheduling information, nS Shunt 112 is selected to be scheduled nS users to offload processing user data, i.e., according to the scheduling information "of each user supported Stream", the scheduled nS users into L th user data stream output. L是所有调度用户的数据所分到的码流数的总和。 L is the total number of code streams of all scheduled user data is assigned.

[0069] 然后,由载波波束分配器113将分流器112输出的L个码流视为L个不同的层进行处理,根据调度信息中“发送每个码流的指定子载波上的指定发射波束”,将发送的L个码流分别分配到指定子载波的指定发射波束上,也就是,将L个码流分配到频域和空域信道, 形成多个频域信号。 [0069] Then, the output 113 by the carrier beam splitter 112 L dispenser code stream of an L different layers for processing, scheduling information specified transmit beam "on each designated subcarrier transmission stream according to on ", the L code streams transmitted respectively allocated to the subcarriers specified designated transmit beam, i.e., the L code streams to the frequency and spatial distribution channel, forming a plurality of frequency domain signals. 这里,假设该多载波MIMO通信系统中的子载波数为N。 Here, it is assumed that the number of subcarriers in multicarrier MIMO communication system is N. ,发射天线数为ητ,则,此时的输出为N。 , The number of transmitting antennas ητ, then, output at this time is N. X ητ个频域信号,即,每个子载波上支持ητ个发射波束。 X ητ frequency-domain signals, i.e., the support beams ητ transmit each subcarrier. 在N。 In N. X ητ个频域信号中,只有L个频域信号才具有用户数据。 X ητ frequency-domain signals, only L frequency-domain signals having a user data only.

[0070] 接下来,该Ν。 [0070] Next, the Ν. Χητ个频域信号分别输入到&个多载波波束成形器114中,其原则为,对于同一子载波上的ητ个频域信号,分别输入到ητ个多载波波束成形器114中对应的一个多载波波束成形器114中,也就是,将Ν。 Χητ frequency-domain signals are input to & multicarrier beamformer 114, which principle, for ητ frequency-domain signals on the same subcarriers are input into a plurality ητ multicarrier beamformer 114 corresponding carrier beamformer 114, i.e., the Ν. Χητ个频域信号中属于同一空域信道的N。 Χητ frequency-domain signal belonging to the same spatial channel N. 个频域信号输入到对应的一个多载波波束成形器114中。 Frequency-domain signal is input to a corresponding one of multi-carrier beamformer 114. 因此,每个多载波波束成形器114均分别接收N。 Thus, each multi-carrier beamformer 114 receives both N. 个对应于该子载波波束成形器的频域信号,每个频域信号对应于一个子载波。 A subcarrier corresponding to the frequency domain beamformer signals, each signal corresponding to a frequency-domain sub-carriers.

[0071] 随机向量产生器117产生随机向量,并将产生的随机向量分别输入到对应的多载波波束成形器114中。 [0071] The random vector generator 117 generates a random vector, and the resulting random vector are input to the multi-carrier corresponding beamformer 114.

[0072] 每个多载波波束成形器114根据随机向量产生器117所产生的随机向量,将输入其中的N。 [0072] Each multi-carrier beamformer 114 according to a random vector generated by a random vector generator 117, wherein the input N. 个频域信号进行波束成形处理,形成分别针对ητ根天线的ητ个时域发送信号,即, 每个时域发送信号对应于ητ根发送天线中的一根发送天线。 Frequency-domain beamforming processing signals, respectively, for forming time-domain transmission signal ητ ητ antennas, i.e., each time domain transmission signal corresponding to the transmission antennas ητ a transmitting antenna. 其实质是,每个时域发送信号对应于所有N。 The essence is that each time domain transmission signal corresponding to all N. 个子载波的一个独立的空域信道。 A separate spatial channel sub-carriers. 所有ητ个多载波波束成形器114将形成ητΧητ个发送信号。 All ητ multicarrier beamformer 114 formed ητΧητ transmission signals.

[0073] 由具有ητ个加法器的加法器组118中对应的一个加法器将对应于同一根发送天线的ητ个时域发送信号进行叠加,形成一个总的发射信号,这样,来自不同的多载波波束成形器的、对应于同一发送天线的时域发送信号对应于一个独立的空域-频域信道。 [0073] by a corresponding adder group having ητ adders 118 of an adder corresponding to the same one transmission antenna ητ time domain transmission signals are superimposed to form a total transmit signal, so that, from a different multi- carrier of the beamformer, corresponding to the same transmitting antenna transmits a time domain signal corresponding to a separate spatial - frequency domain channel. 然后,每个加法器将其形成的发射信号输出到循环前缀器组115中。 Then, each adder adds an output transmission signal formed of a cyclic prefix to the group 115. ητ个加法器总共输出ητ个分别对应于一根发送天线的发射信号。 ητ adder output ητ total transmitted signals respectively corresponding to a transmission antenna. [0074] 循环前缀器组115包括ητ个循环前缀器,每个循环前缀器对应于一根发送天线。 [0074] The cyclic prefix 115 includes a group ητ cyclic prefix, each cyclic prefix corresponds to a transmission antenna. 每个循环前缀器对来自多载波波束成形器114的、对应于同一根发送天线的发射信号插入循环前缀,生成对应的插入了循环前缀的发射信号。 Each pair cyclic prefix from multicarrier beamformer 114, corresponding to the cyclic prefix is ​​inserted a transmission antenna with the transmission signal to generate a transmit signal corresponding to the inserted cyclic prefix. %个循环前缀器总共输出%个分别对应于ητ根发送天线的发射信号。 % Cyclic prefix is ​​a total of outputs respectively corresponding to ητ% transmission antennas transmit signals.

[0075] 发送射频链路组116,用于接收从循环前缀器组115输出的ητ个发射信号,将该ητ 个发射信号转化为对应的射频信号,并将每个发射信号所对应的射频信号均通过双工器组130上的ητ根发送天线发送出去。 [0075] The transmitting RF link group 116, for receiving the transmitted signals ητ cyclic prefix group 115 output from the ητ transmitted signals converted into the corresponding RF signals, and the signals corresponding to each transmit RF signals It is sent via the transmission antennas ητ a duplexer group 130.

[0076] 具体地,以下将结合图8具体说明多载波MIMO通信系统中的多载波波束成形过程。 [0076] Specifically, the following detailed description in conjunction with FIG. 8 multi-carrier MIMO multicarrier communication system beamforming process.

[0077] 如图8所示,每个多载波波束成形器114包括一个IFFT变换器1141、ητ路由乘法器1142和延时器1143组成的串行组合。 [0077] As shown, each of the multi-carrier 114 comprises a beamformer IFFT transformer 1141, ητ routing multiplier 1142 and delay 1143 serial combination consisting of 8.

[0078] 该IFFT变换器1141接收载波波束分配器113输出的对应的N。 [0078] The IFFT transformer 1141 outputs the received carrier beam corresponds dispenser 113 N. 个频域信号,通过IFFT变换形成串行时域信号,并将该串行时域信号并行地分别输出到由乘法器1142和1143组成的ητ路串行组合中。 Frequency-domain signals, a serial time-domain signal, and outputs the parallel signal domain to the serial combination ητ passage by multipliers 1142 and 1143 when the composition is formed by the serial IFFT transformation. 其中,N。 Wherein, N. 个频域信号所对应的子载波彼此不同。 Frequency-domain signal corresponding to the subcarriers different from each other.

[0079] 同时,随机向量产生器117将产生的随机向量输入到ητ个多载波波束成形器114中的对应的多载波波束成形器114中。 [0079] Meanwhile, the random vector random vector generator 117 is input to the generated multi-carrier ητ beamformer 114 corresponding multicarrier beamformer 114. 该随机向量包括向量 The random vector comprises a vector

h,…祝…H,…仮]和向量[0^,0^...0^ ,...Cd^Cdn1T ,...Cdl ],其中, H, H ... Good ..., ... temporary substitute lot] and vector [0 ^, 0 ^ ... 0 ^, ... Cd ^ Cdn1T, ... Cdl], wherein,

和O//分别表示第i个多载波波束成形器114中的IFFT变换器1141所输出的第j路串行时域信号的权重和延时,O彡i彡ητ,0彡j彡ητ。 O // weight and represent the j-th time domain signal path 1141 the i-th IFFT transformer multicarrier beamformer 114 output by serial weight and delay, O San i San ητ, 0 j San San ητ.

[0080] 每路由乘法器1142和延时器1143组成的串行组合根据随机向量产生器117输入的向量[M, vS,...7^...,7^,1,.对输入其中的串行时域信号进行加权处理, [0080] Each combination of serial routing multipliers 1142 and 1143 delay the composition according to the vector input 117 of the random vector generator [M, vS, ... 7 ^ ..., 7 ^, 1 ,. wherein the input serial weighted time-domain signal processing,

并根据[0^«„0^”„0/;\0^,„„(:<^]对该串行时域信号进行延时处理,形成一个发 And [ "^ 0" "0/0 ^«; \ 0 ^ "" (: <^] According to the serial time-domain signal by delaying treatment to form a hair

送信号。 Send signals. 该加权处理和延时处理等效于: The weighting process equivalent to the processing delay and:

/ ΓΤ / . 2m · Cdji λ [0081 ] w/ = VA exP(-7 (3) / ΓΤ /. 2m · Cdji λ [0081] w / = VA exP (-7 (3)

[0082] 这样,每个多载波波束成形器114将形成ητ个发送信号,ητ个多载波波束成形器114将形成ητΧητ个发送信号。 [0082] Thus, each multi-carrier beamformer 114 formed ητ transmission signals, multicarrier ητ beamformer 114 formed ητΧητ transmission signals. 其中,在每个多载波波束成形器114形成的ητ个发送信号分别对应于ητ根发送天线中的一根发送天线。 Wherein, ητ transmitting multi-carrier signals in each beamformer 114 is formed respectively corresponding to a transmission antenna ητ of transmission antennas.

[0083] 对于ητ个多载波波束成形器114输出的ητ X ητ个发送信号中对应于同一发送天线的发送信号,通过加法器组118中对应的加法器叠加形成对应的发射信号后输入到循环前缀器组115中对应的循环前缀器,由该对应的循环前缀器对输入其中的发射信号插入循环前缀,并将插入循环前缀的信号发送给发送射频链路组116。 After [0083] The transmitted signal 114 outputted ητ multi-carrier beamformer ητ X ητ transmission signals corresponding to the same transmitting antenna, transmitting a signal corresponding to superposition is formed by an adder group 118 corresponding to the number of the inputs to the loop prefix 115 corresponding group is a cyclic prefix by a cyclic prefix corresponding to the cyclic prefix insertion wherein the input transmission signal, and inserting a cyclic prefix of the signal transmitted to the transmission RF link group 116. 循环前缀器组115中的ητ个循环前缀器总共输出ητ个插入循环前缀的发射信号。 The cyclic prefix group 115 ητ cyclic prefixes at total output ητ cyclic prefix insertion transmit signal.

[0084] 图9中进一步描述了发送射频链路组116的具体结构,其包括ητ个并行发送射频链路,每个发送射频链路具有串行连接的调制器1161、上变频器1162以及功率放大器1163,该功率放大器可以是大功率线性放大器。 In [0084] Figure 9 further describes the particular configuration of a transmission RF link group 116, which includes a radio frequency link ητ parallel transmission, each transmit radio frequency link having a modulator 1161 connected in series, and the power converter 1162 1163 amplifier, the power amplifier can be a high-power linear amplifier. 其中,该送射频链路分别用于将循环前缀器组115输出的ητ个发射信号转化为相应的射频信号。 Wherein the radio frequency link, respectively, for sending transmitted signals ητ group 115 outputs a cyclic prefix into the corresponding RF signals.

[0085] 图10为本发明发送端10的双工器组130的示意图。 [0085] FIG 10 a schematic view of the duplexer group 130 of the terminal 10 transmits the present invention. 其中,该双工器组130包括ητ个并行的双工器。 Wherein, the diplexer 130 includes a set of parallel ητ duplexer. 每一个双工器与一根对应的发送天线相连接,并且均连接到发送射频链路组116和接收射频链路组123。 Each transmission antenna duplexer is connected to a corresponding, and are connected to transmit RF link group 116 and a receiving RF link group 123.

[0086] 接收端20 [0086] receiving end 20

[0087] 为了简化描述,这里仅仅示出了其中一个接收端20。 [0087] To simplify the description, there is shown only one of which is a receiving end 20.

[0088] 在图11中,该接收端20具有多载波接收信号处理器210、反馈信息处理器220、双工器组230以及ηκ根天线。 [0088] In FIG. 11, the receiving terminal 20 has 210, a feedback information processor 220, a duplexer group 230 and the antenna ηκ multicarrier reception signal processor.

[0089] 其中,该多载波接收信号处理器210包括接收射频链路组211和MIMO接收信号处理器212。 [0089] wherein the multi-carrier receive signal processor 210 includes a receiving RF link group 211 and a MIMO received signal processor 212. 该反馈信息处理器220包括MIMO发送信号处理器221和发送射频链路组222。 The feedback information processor 220 includes a MIMO transmitting signal processor 221 and transmitting RF link group 222.

[0090] 该接收射频链路组211具有与接收天线数量ηκ相同的并行的接收射频链路(图未示),用于将接收到的射频信号恢复为相应的码流,并发送给MIMO接收信号处理器212。 [0090] The receiving RF link group 211 has the same number of receiving antennas ηκ parallel receiving RF links (not shown) for converting the received radio frequency signal to recover the corresponding stream, and sends the received MIMO The signal processor 212.

[0091] 该MIMO接收信号处理器212将码流还原为原始的用户数据,并将其输出。 [0091] The MIMO reception signal processor 212 will revert to the original stream of user data, and outputs it.

[0092] 以下将根据不同的用户调度方法说明本发明的调度过程。 [0092] Here will be described the scheduling process of the present invention according to different user scheduling methods. 对于接收端20来说,在本发明的调度中,对于每个具有多根天线的接收端20,可以将其考虑成相同数量的具有一根天线的接收端20。 For the receiving end 20, in the scheduling of the present invention, each having a receiving end for multiple antennas 20, which may be considered to have an antenna receiving end 20 of the same number. 因此,我们在这里仅仅以每个接收端20具有一根天线的情况来进行说明,可以将这个说明延伸到每个接收端20具有多根天线的情况。 Therefore, we have a situation where only one antenna 20 to each of the receiving end will be described, this description can be extended to the case where each of the receiving end 20 having a plurality of antennas.

[0093] 第一调度方法 [0093] The first scheduling method

[0094] 对于每个接收端20,其根据该信道衰落状况,通过多载波接收信号处理器210可以对接收信号进行处理,获得用户反馈信息,并将其传送给反馈信息处理器220。 [0094] For each of the receiving terminal 20, which according to the channel fading conditions, may be processed by the multi-carrier signal processor 210 receives the received signal, to obtain the user feedback information, and transmits it to the feedback information processor 220. 其中,该用户反馈信息中包括:在每个子载波上,对于该接收端来说最好的发射波束的组合nk、该最好发射波束组合中每个发射波束所对应的信干比GNIk。 Wherein the user feedback information includes: on each subcarrier, to the receiving end is a combination of best transmit beams nk, the best transmit beam combination SIR corresponding to each transmit beam than GNIk.

[0095] [0095]

Figure CN1964217BD00131

[0096] [0096]

Figure CN1964217BD00132

[0097] 其中,Wn表示发送端的随机复数向量(相当于式(3)中的<),Hk表示发送端10 与接收端20之间的信道衰落矩阵。 [0097] wherein, Wn represents the random complex vector of the transmitting side (corresponding to formula (3) <), Hk denotes a transmission terminal 10 and the receiving channel fading matrix between the end 20.

[0098] 反馈信息处理器220将接收到的用户反馈信息进行处理,将其转化成适合MIMO通信系统的反馈信号。 [0098] Feedback information processor 220 stores the received user feedback information is processed, converted into a feedback signal for MIMO communication system. 该反馈信号通过接收端20的天线经反馈信道反馈给发送端10。 The feedback signal received through the antenna terminal 20 via a feedback channel 10 back to the transmitting end.

[0099] 当发送端10的调度器121接收到反馈信号时,进行系统调度。 [0099] When the scheduler 121 of the transmitting side 10 receiving the feedback signal, the system scheduling. 由于每个接收端20 都反馈了其在每个子载波上最好的发射波束的组合nk、该最好发射波束组合中每个发射波束所对应的信干比GNIk,因此,调度过程主要包括: Since each of the receiving terminal 20 are feedback combination thereof best transmit beams nk on each subcarrier, the transmission signal is preferably in the dry composition beams corresponding to each transmit beam than GNIk, therefore, the scheduling process mainly includes:

[0100] 1)设置用户调度列表SU和已分配发射波束列表SB为空; [0100] 1) a list of user scheduling set SU and the allocated transmit beam SB list is empty;

[0101] 2)对于每一个子载波,将重复以下步骤i)至iii): [0101] 2) For each subcarrier, the repeating steps i) to iii):

[0102] i)比较所有反馈回来的信干比GNIk,选出一个有最大信干比GNIk的用户加入到用户调度列表SU中,并把相应的发射波束加到已分配发射波束列表SB中; [0102] i) comparing all the fed back signal to interference ratio GNIk, selecting a maximum signal to interference added to the user than the scheduling list GNIk user SU and the corresponding transmit beam applied to the allocated transmit beam SB in the list;

[0103] ii)然后,比较所有反馈回来的信干比GNIk,从未调度的用户中选出具有最大的信干比GNIk的用户,将其加入到用户调度列表SU中,并把相应的发射波束加到已分配发射波束列表SB中; [0103] ii) Then, comparing all the fed back signal to interference ratio GNIk, never selected scheduled user having the greatest signal to interference ratio GNIk user, it is added to the list of the SU user scheduling, and the respective transmit allocated transmit beam applied to the beam SB in the list;

[0104] iii)重复步骤i)和ii),直至完成在该载波上的用户调度; [0104] iii) repeating steps i) and ii), until the scheduled user on the carrier is completed;

[0105] 3)最后,根据最后针对所有子载波所生成的用户调度列表SU和已分配发射波束列表SB,控制多载波MIMO数据处理器110把所调度用户的数据流分成独立的码流、并分配到指定子载波的指定发射波束上,从而从发送天线上发送出去。 [0105] 3) Finally, the last sub-carrier for all the user schedule list generated by the SU and the allocated transmit beam SB list, in accordance with a control multi-carrier MIMO data processor 110 is scheduled user data stream into separate streams, and assigned to the designated subcarrier specified transmit beam, thereby transmitted from the transmitting antenna.

[0106] 在上述调度步骤幻中,对于每个子载波,如果在某个接收端20 (用户)已经加入到用户调度列表SU中,并且,选择到其最好发射波束组中另一发射波束时,由于该接收端20只有一根天线,因此其不能被再调度。 When [0106] In the above scheduling step in phantom, for each sub-carrier, if a receiving terminal 20 (user) has been added to the list of the SU user scheduling, and to select the best transmit beam set in which a further transmit beam Since the receiving end only one antenna 20, and therefore it can not be re-scheduled. 此时,对于该子载波所进行的用户调度结束。 In this case, the user scheduled for the end of the subcarriers.

[0107] 同时,在上述调度步骤幻中,对于每个子载波,如果该用户对应的发射波束已经加入到已分配发射波束列表中,则该用户不能被调度。 [0107] Meanwhile, in the scheduling step in phantom, for each sub-carrier, if the user has joined the corresponding transmit beam to the allocated transmit beam in the list, the user can not be scheduled. 此时,对于该子载波所进行的用户调 In this case, the user of the sub-carrier modulation performed

/又纟口>Κ ο / Si and mouth> Κ ο

[0108] 对于每个接收端20具有多根天线的情况,如果将每根天线假设为一个接收端(用户),那么每个接收端多根天线的调度情况和每个接收端只有一根天线的调度情况相似。 [0108] For each case where a receiving end 20 having a plurality of antennas if each antenna is assumed to be a receiving side (user), the scheduling of each of the receiving end and the receiving end of each of the plurality of antennas only one antenna similar scheduling situation.

[0109] 第二调度方法 [0109] The second scheduling method

[0110] 当本发明多载波MIMO通信系统考虑到每个子载波上发射波束之间的干扰且所要调度的用户数目为固定的M个(1 <ΜΧΝ。<ητ)时,对于每个接收端20,其根据信道衰落状况,通过多载波接收信号处理器210可以对接收信号进行处理,获得用户反馈信息,并将其传送给反馈信息处理器220。 When [0110] When the number of user multi-carrier MIMO communication system of the present invention contemplates transmitting an interference between the beam and be scheduled on each sub-carrier for the fixed number M (1 <ΜΧΝ. <Ητ), each receiving end 20 for which according to the channel fading conditions, may be performed by a multicarrier receiver signal processor 210 processing the received signal to obtain the user feedback information, and transmits it to the feedback information processor 220. 其中,该用户反馈信息中包括:在每个子载波上,对于该接收端20来说最好的发射波束的组合nk、该最好发射波束组合nk中每个发射波束所对应信干比GNIk、以及该接收端干扰最小的发射波束的组合仏。 Wherein the user feedback information includes: on each sub-carrier, the receiver 20 is for a combination of best transmit beams nk end, the best transmit beams nk of each combination of the transmit beam corresponding to the signal to interference ratio GNIk, minimum interference and the receiver transmit beam combination Fo. 其中,在每一子载波上,对于最好发射波束组合nk中最好发射波束的数量、以及对接收端干扰最小的(MI)个发射波束组合Qk中发射波束的数量,可以根据实际信道状况进行选择,其原则是,同一发射波束不能同时包含在这两个组合中。 Wherein, on each sub-carrier, the number of the best transmit beams to the best transmit beams nk composition, and a receiving end with minimum interference (MI) transmit beams in combination Qk number of beams emitted, according to the actual channel conditions is selected, the principle is the same transmit beam can not be included in both of the two combinations.

[0111] [0111]

Figure CN1964217BD00141

[0112] 其中,S表示在每个子载波上的%个波束中选出(MI)个不同干扰最小的波束所有可能的集合。 [0112] where, S represents in each subcarrier% beams selected set of all possible (MI) of different minimum interference beam.

[0113] 反馈信息处理器220将接收到的用户反馈信息进行处理,将其转化成适合MIMO通信系统的反馈信号。 [0113] Feedback information processor 220 stores the received user feedback information is processed, converted into a feedback signal for MIMO communication system. 该反馈信号通过接收端20的天线经反馈信道反馈给发送端10。 The feedback signal received through the antenna terminal 20 via a feedback channel 10 back to the transmitting end.

[0114] 当发送端10的调度器121接收到反馈信号时,进行系统调度。 [0114] When the scheduler 121 of the transmitting side 10 receiving the feedback signal, the system scheduling. 此时,由于每个接收端20都反馈了其在每个子载波上的最好发射波束的组合nk、该最好发射波束组合nk中每个发射波束所对应的信干比GNIk、以及对该接收端干扰最小的(MI)个发射波束的组合Qk,因此,调度过程主要包括: At this time, since the receiving terminal 20 each have feedback combination thereof best transmit beams nk of each subcarrier on the best transmit beams nk of the composition SIR corresponding to each transmit beam than GNIk, and the receiving causing minimal interference (MI) transmit beams Qk combination, therefore, the scheduling process mainly includes:

[0115] 1)设置用户调度列表SU和已分配发射波束列表SB为空; [0115] 1) a list of user scheduling set SU and the allocated transmit beam SB list is empty;

[0116] 2)对于每一个子载波,将重复以下步骤i)至iii):[0117] i)比较所有反馈回来的信干比GNIk,选出一个有最大信干比GNIk的用户加入到用户调度列表SU中,并把相应的发射波束加到已分配发射波束列表SB中; [0116] 2) For each subcarrier, the repeating steps i) to iii): [0117] i) comparing all the fed back signal to interference ratio GNIk, selecting a maximum signal to interference ratio is added to the user's user GNIk scheduling list the SU and the corresponding transmit beam applied to the allocated transmit beam SB in the list;

[0118] ii)针对用户调度列表中的用户,从其对应的组合Qk中找出相应的干扰最小的发射波束,然后,根据该干扰最小的发射波束找出其所对应的最大信干比的用户,并将该用户加入到用户调度列表中,同时,将该用户对应的发射波束加到已分配发射波束列表中; [0118] ii) for user user scheduling list, find the corresponding minimum interference from its corresponding transmit beam combination Qk, and then find the maximum signal to interference ratio based on its corresponding minimal interference to the transmit beam user, and the user is added to the list of user scheduling, at the same time, the transmission beam corresponding to the user is added to the list allocated transmit beam;

[0119] iii)重复步骤i)和ii),直到完成在该子载波上的用户调度; [0119] iii) repeating steps i) and ii), until the scheduled user on the sub-carrier;

[0120] 3)最后,根据最后针对所有子载波生成的用户调度列表SU和已分配发射波束列表SB,控制多载波MIMO数据处理器110把所调度用户的数据流分成独立的码流、并分配到指定子载波的指定发射波束上,从而从发送天线上发送出去。 [0120] 3) Finally, the last sub-carrier for all the schedule list generated user SU and the allocated transmit beam SB list, in accordance with a control multi-carrier MIMO data processor 110 as separate streams into a data flow scheduling, and partitioned to the specified subcarriers specified transmit beam, thereby transmitted from the transmitting antenna.

[0121] 第三调度方法 [0121] The third scheduling method

[0122] 当本发明多载波MIMO通信系统考虑到每个子载波上的发射波束之间的干扰、以及该干扰对系统容量的影响时,对于每个接收端20,其根据该信道衰落状况,通过多载波接收信号处理器210可以对接收信号进行处理,获得用户反馈信息,并将其传送给反馈信息处理器220。 [0122] When the multi-carrier MIMO communication system of the present invention contemplates the interference between transmit beams on each subcarrier, the impact on system capacity and interference for each receiver end 20, which according to the channel fading condition, by multicarrier reception signal processor 210 may process the received signal to obtain the user feedback information, and transmits it to the feedback information processor 220. 其中,该用户反馈信息中包括:在每个子载波上,对于该接收端20来说最好发射波束的组合nk、该最好发射波束组合nk中每个发射波束所对应的等效信道增益GNk、对该接收端干扰最小的发射波束的组合仏、以及该组合A中的每个发射波束对该接收端的最好发射波束的性能损失比Dk,” Wherein the user feedback information includes: on each sub-carrier, the receiver for the best combination of transmit beams nk for the end 20, which is preferably a combination of transmit beams nk of each transmit beam corresponding to the equivalent channel gain GNk , the receiving end of the transmission beam minimal interference Fo combination, and the combination of a each transmit beam in the performance of the best transmit beams loss receiving end than Dk, "

[0123] {Dk, J = {GNk/ I hk*Wi 12,ie QJ (7) [0123] {Dk, J = {GNk / I hk * Wi 12, ie QJ (7)

[0124] 反馈信息处理器220将接收到的用户反馈信息进行处理,将其转化成适合MIMO通信系统的反馈信号(射频信号)。 [0124] Feedback information processor 220 stores the received user feedback information is processed, converted into a feedback signal (RF signal) for MIMO communication system. 该反馈信号通过接收端20的天线经反馈信道反馈给发送端10。 The feedback signal received through the antenna terminal 20 via a feedback channel 10 back to the transmitting end.

[0125] 当发送端10的调度器121接收到反馈信号时,进行系统调度。 [0125] When the scheduler 121 of the transmitting side 10 receiving the feedback signal, the system scheduling. 此时,由于每个接收端20都反馈了其在每个子载波上最好发射波束的组合nk、该组合nk中每个发射波束的等效信道增益GNk、对该接收端干扰最小的发射波束的组合仏、以及该组合&中的每个发射波束对该接收端的最好发射波束的性能损失比Dk,因此,调度过程主要包括: At this time, since the receiving terminal 20 each have feedback combination thereof best transmit beams nk of each subcarrier on the combination nk each equivalent channel gain GNk transmit beam, the receiving end of the transmission beam minimal interference Fo combination, and the combination of each transmit beam in the performance loss & best transmit beam receiving end than Dk, therefore, the scheduling process mainly includes:

[0126] 1)设置用户调度列表SU和已分配发射波束列表SB为空; [0126] 1) a list of user scheduling set SU and the allocated transmit beam SB list is empty;

[0127] 2)对于每个子载波,将重复以下步骤i)至iv): [0127] 2) For each subcarrier, the repeating steps i) to iv):

[0128] i)比较所有反馈回来的等效信道增益GNk,选出一个有最大等效信道增益GNk的用户加入到用户调度列表SU中,并把相应的发射波束加到已分配发射波束列表SB中; [0128] i) comparing all the fed back equivalent channel gains Gnk, selecting a maximum equivalent channel gain Gnk user added to the list of the SU user scheduling, and the corresponding transmit beam applied to the list of allocated transmit beam SB in;

[0129] ii)针对用户调度列表中的用户,从其对应的组合Qk中找出相应的干扰最小的发射波束,然后该干扰最小的发射波束所对应的最大信干比的用户; [0129] ii) for user user scheduling list, find the corresponding minimum interference from its corresponding transmit beam combination Qk, and then the maximum signal interference minimum transmission beam corresponding to the user than the stem;

[0130] iii)根据反馈的性能损失比Dk,判断该用户的加入是否增加了系统容量,如果该用户的加入使得系统容量增加,则将该用户加入到用户调度列表中,同时,将该用户对应的发射波束加到已分配发射波束列表中。 [0130] iii) The performance loss ratio Dk feedback, the user determines whether to increase the system capacity is added, if the user was added such that the system capacity is increased, then the user is added to the list of user scheduling, at the same time, the user corresponding to the allocated transmit beam applied to the transmit beams list. 如果该用户的加入使得系统容量降低,则不将该用户加入到用户调度列表,并结束在该子载波上的用户调度; If the user was added such that the system capacity is reduced, the user is not added to the list of scheduled users, and on the end user scheduling sub-carriers;

[0131] iv)当该用户加入后,依次重复步骤i)和iii),直到在该子载波上的用户调度结束; [0131] iv) When the user is added, successively repeating steps i) and III), until the end of the scheduled user on the sub-carrier;

[0132] 3)最后,根据最后针对所有子载波的用户调度列表SU和已分配发射波束列表SB, 控制多载波MIMO数据处理器110把用户的数据流分成独立的码流,分配到的指定子载波的指定发射波束上,然后从发射天线上发送出去。 [0132] 3) Finally, the last divided into separate streams for SU user scheduling list of all the subcarriers allocated transmit beam and the list SB, the control multi-carrier MIMO data processor 110 of the user data stream, is assigned to the specified child specified transmit beams carrier, and transmitted from the transmitting antenna.

[0133] 因此,该第三调度方法可以自适应地调度用户,从而可以充分地利用信道状况,提供最大的信道容量。 [0133] Thus, the third scheduling method can schedule the user adaptively, thereby fully utilize channel conditions, to provide maximum channel capacity.

[0134] 为了更清楚地体现本发明的调度系统及调度方法的优越性,请参阅图12至图14, 这里给出了实际的信道中不同调度方法的性能比较,其中子载波数N。 [0134] In order to more clearly reflect the superiority of the scheduling system and scheduling method of the present invention, see FIGS. 12 to 14, there is given the actual performance comparison of different scheduling methods channel, wherein the number of subcarriers N. = 64,码流数L = 3, 发射功率P = 10。 = 64, the code number of streams L = 3, the transmission power P = 10.

[0135] 在图12中,横坐标表示Ricean因子k,纵坐标表示所获得的信道容量。 [0135] In FIG. 12, the abscissa represents Ricean factor k, the ordinate represents channel capacity obtained. 当发送端的天线数为2、用户数量为32时,随着Ricean因子k的增加,信道容量逐渐降低,相比参考文献1中揭示的方法和传统的随机高斯加权方法,采用本发明的通信方法,信道容量的减少量小并且相对比较平缓。 When the number of antennas transmitting end is 2, the number of users is 32, with an increase Ricean factor k, the channel capacity is decreased, as compared to the reference method and the conventional random Gaussian weighting method in Document 1 disclosed in, using the communication method of the present invention , a small amount of the reduction of channel capacity and relatively flat.

[0136] 在图13中,横坐标表示用户数,纵坐标表示所获得的信道容量。 [0136] In FIG. 13, the abscissa represents the number of users, the ordinate represents channel capacity obtained. 当Ricean因子k =10、发送端的天线数为2时,随着用户数量的增加,相比参考文献1中揭示的方法和传统的随机高斯加权方法,采用本发明的通信方法,可以获得更大的信道容量增量。 When the Ricean factor of k = 10, the number of antennas transmitting end 2, as the number of users, compared to the method disclosed in reference 1 and the conventional random Gaussian weighting method, a communication method of the present invention, can be greater channel capacity increment.

[0137] 在图14中,横坐标表示发送端的发射天线数,纵坐标表示所获得的信道容量。 [0137] In FIG. 14, the abscissa represents the number of transmit antennas of the transmitting side, the ordinate represents channel capacity obtained. 在用户数量为256时,随着发送天线数量的增加,相比参考文献1中揭示的方法和传统的随机高斯加权方法,采用本发明的通信方法可以获得更大的信道容量增量。 In the number of users is 256, the number of transmitting antennas increases as compared to the reference method and the conventional random Gaussian weighting method disclosed in Document 1, a communication method of the present invention may be greater channel capacity increment.

[0138] 通过上述比较可以看出,本发明的通信系统和通信方法所提供的信道容量高于参考文献1中揭示的方法和传统的随机高斯加权方法所能提供的信道容量。 [0138] As can be seen by the comparison, the channel capacity of the communication system and a communication method of the present invention there is provided a method of channel capacity is higher than in Reference 1 discloses a conventional random and Gaussian weighting method can be provided.

[0139] 综上所述,本发明的多载波MIMO通信系统和通信方法可以根据当时的信道状况、 不同的反馈信息进行用户调度,提高系统控制的智能化以及通信稳定性,并始终保持最大的系统容量。 [0139] In summary, a multi-carrier MIMO communication system and a communication method of the present invention may be based on current channel conditions, different feedback information for user scheduling, to improve the intelligence of the system control and communication stability, and always maintaining maximum system capacity. 除了可以获得最大的信道容量之外,本发明的多载波MIMO通信系统由于采用了一种新的算法,其可以克服现有现有多载波MIMO通信系统需要很多伪随机发生器来产生大量随机数的缺点,同时可以优化随机向量的联合概率密度函数,并且算法的复杂度也较低。 In addition to the maximum channel capacity than the multi-carrier MIMO communication system according to the present invention thanks to a new algorithm, which can overcome the conventional multi-carrier MIMO communication system needs a lot of pseudo-random generator to generate a large number of random numbers disadvantages, and we can optimize the joint probability density function of random vectors, and the complexity of the algorithm is also low.

Claims (16)

1. 一种多载波MIMO通信系统,其包括用于发送至少具有信道估计信号和用户数据的数据帧的发送端(10),以及用于接收发送端(10)发送的数据帧、产生相应的反馈信号并还原用户数据的至少一接收端(20),其特征在于:该发送端(10)包括:第一双工器组(130)和位于其上的发送天线,用于发送数据帧,并接收来自接收端(20)的反馈信号;多载波MIMO调度器(120),用于根据该反馈信号产生调度信息; 多载波MIMO数据处理器(110),用于根据调度信息选择需要调度的用户,并将所选择用户的数据形成对应的多载波发射信号,以及该接收端00)包括:第二双工器组O30)以及位于其上的接收天线,用于接收来自发送端(10)的数据帧, 并发送反馈信号;多载波接收信号处理器010),用于根据数据帧产生用户反馈数据和还原用户数据; 反馈信息处理器020),用于将用户反馈 A multi-carrier MIMO communication system, comprising means for transmitting data having at least the channel estimation signal and the user data frame sending end (10), for receiving and transmitting terminal (10) transmits data frames to produce the corresponding the feedback signal and restore the user data of at least one receiving terminal (20), characterized in that: the transmitting end (10) comprising: a first duplexer group (130) and a transmitting antenna disposed thereon for transmitting a data frame, and receives a feedback signal from the receiving end (20); a multi-carrier MIMO scheduler (120) for generating a feedback signal based on the scheduling information; multi-carrier MIMO data processor (110), to select the scheduling information according to scheduling user, the user data and the selected multi-carrier transmitting signals corresponding to, and the receiver 00) is formed comprising: a second set O30 duplexer) and a receiver antenna positioned thereon for receiving from the sender (10) data frame, and transmits the feedback signal; multicarrier reception signal processor 010), a frame generating user feedback data and restoring data in accordance with user transactions; feedback information processor 020), for user feedback 数据转化成反馈信号; 其中,该多载波MIMO数据处理器(110)包括: 用户选择器(111),用于根据调度信息,选择所要调度的用户; 多个并行排列的分流器(112),用于对所调度的用户的用户数据进行分流处理,输出多个码流;载波波束分配器(113),用于根据调度信息,将分流器输出的码流分别分配到调度信息所指定的对应子载波的对应波束上,形成多个频域信号;随机向量产生器(117),用于产生并输出随机向量,所述随机向量为权重向量和延时向量;多个并行的多载波波束成形器(114),每个多载波波束成形器根据接收自载波波束分配器(113)的频域信号以及来自随机向量产生器(117)的随机向量,形成多个分别与一根发送天线对应的时域信号;加法器组(118),具有多个加法器,每个加法器分别将对应于同一发送天线的时域信号进行叠加,形成一个发 Data is converted into a feedback signal; wherein the multi-carrier MIMO data processor (110) comprising: a user selector (111), according to the scheduling information, selecting a user to be scheduled; arranged in a plurality of parallel splitter (112), user data for the user scheduled shunt, and outputs a plurality of streams; carrier beam allocator (113), according to the scheduling information, the code stream output from the splitter are allocated to the scheduling information corresponding to the specified beam on the corresponding sub-carriers, a plurality of frequency domain signals; random vector generator (117), for generating and outputting a random vector, the weight vector is a random vector and delay vector; a plurality of parallel multi-carrier beamforming (114), each multi-carrier beam beamformer according to carrier frequency domain signal received from the distributor (113) and a random vector from the random vector generator (117) is formed with a plurality of transmitting antennas respectively corresponding to time domain signal; group adder (118) having a plurality of adders, each adder respectively corresponding to the same time domain signal transmission antenna are superimposed to form a hair 射信号;循环前缀器组(115),具有多个循环前缀器,每个循环前缀器分别在对应的加法器输出的发射信号中插入循环前缀;以及第一发送射频链路组(116),用于接收循环前缀器组(11¾输出的多个发射信号,并将该多个发射信号分别转化为对应的射频信号;其中,每个多载波波束成形器(114)包括一IFFT变换器(1141),以及多路由乘法器(1142)和延时器(1143)组成的串行组合,其中,IFFT变换器(1141)将来自载波波束分配器(113)的频域信号进行IFFT变换,形成串行时域信号,并将该串行时域信号同时输入到上述的多路串行组合中;在每路由乘法器(114¾和延时器(114¾组成的串行组合中,乘法器(114¾和延时器(1143)分别根据随机向量产生器(117)所输出的权重向量和延时向量对该串行时域信号依次进行加权处理和延时处理,生成对应于一根发送天线的时域信号。 Transmission signal; group a cyclic prefix (115) having a plurality of cyclic prefix, each cyclic prefix in the cyclic prefix are respectively inserted into the corresponding transmitted signal output from the adder; and a first transmitting RF link group (116), It means for receiving a cyclic prefix group (11¾ plurality of transmit signals outputted from, and the plurality of transmit signals respectively converted to the corresponding radio frequency signals; wherein each of the multi-carrier beamformer (114) includes an IFFT transformer (1141 ), and the multi-route multiplier (1142) and a delay (1143) serial combinations thereof, wherein, IFFT transformer (1141) the frequency domain signal from the carrier beam allocator (113) performs IFFT transformation, form a string uplink time domain signals, and the serial time-domain signal is simultaneously input to the serial combination of multiple paths; each routing multiplier (114¾ and delay (serial 114¾ composition consisting of, a multiplier (114¾ and delay (1143) according to weight vectors, respectively and successively delayed random vector the weight vector generator (117) output by the serial time-domain signal processing and weighting processing delay, generate a time corresponding to a transmit antenna field signal.
2.如权利要求1所述的多载波MIMO通信系统,其特征在于,该反馈信号包括在每个子载波上,每个接收端OO)最好的发射波束组、以及该最好发射波束组中每个发射波束对应的信干比。 2. The multi-carrier MIMO communication system according to claim 1, wherein the feedback signal on each sub-carrier comprising each receiving terminal OO) best transmit beam set, the best transmit beams and the group each transmit beam corresponding to the signal to interference ratio.
3.如权利要求2所述的多载波MIMO通信系统,其特征在于,该反馈信号进一步包括在每个子载波上的,对每个接收端OO)干扰最小的发射波束的组合。 Multi-carrier MIMO communication system according to claim 2, characterized in that the feedback signal further comprises on each sub-carrier for each receiver terminal OO) a combination of minimum interference of the transmit beam.
4.如权利要求1所述的多载波MIMO通信系统,其特征在于,该反馈信号包括在每个子载波上,每个接收端的最好发射波束的组合、该组合中每个发射波束的等效信道增益、对该接收端干扰最小的发射波束的组合、以及该组合中的每个发射波束对该接收端的最好发射波束的性能损失比。 4. The multi-carrier MIMO communication system according to claim 1, wherein the feedback signal comprises on each subcarrier, a combination of the best transmit beams for each receiving end, the combination of each transmit beam equivalent channel gain, the receiving end transmit beam minimal interference combinations, and combinations of each transmit beam in the performance of the best transmit beams loss than the receiving end.
5.如权利要求1至4任一项所述的多载波MIMO通信系统,其特征在于,该调度信息包括所要调度的用户、每个用户所支持的码流以及发送各个码流的指定子载波上的指定发射波束。 1 to 5. A multi-carrier MIMO communication system of any one of claims 1-4, wherein the scheduling information includes a user to be scheduled, each designated subcarrier supports user streams and transmitting each stream Specifies the transmit beams.
6.如权利要求5所述的多载波MIMO通信系统,其特征在于,该多载波MIMO调度器(120)包括:第一接收射频链路组(123),用于将接收到的反馈信号转化为相应的码流;第一MIMO接收信号处理器(122),用于将转化的码流进行空时信号处理,获得相应的调度信息;以及调度器(121),用于根据该调度信息控制多载波MIMO数据处理器(110)的信号处理。 Multi-carrier MIMO communication system as claimed in claim 5, wherein the multi-carrier MIMO scheduler (120) comprises: receiving a first radio frequency link group (123), for converting the received signal into a feedback corresponding stream; first MIMO received signal processor (122) for converting the code stream is space-time signal processing, to obtain the corresponding scheduling information; and a scheduler (121), according to the scheduling control information multi-carrier MIMO data processor (110) signal processing.
7.如权利要求6所述的多载波MIMO通信系统,其特征在于,该第一发送射频链路组(116)包括多个并行发送射频链路,分别将循环前缀器组(11¾输出的多个发射信号转化为对应的射频信号,每一发送射频链路包括串行连接的一调制器(1161)、一上变频器(1162)以及一功率放大器(1163)。 7. The multi-carrier MIMO communication system as claimed in claim 6, characterized in that the first transmit RF link group (116) comprises a plurality of parallel transmit RF links, respectively, the cyclic prefix group (11¾ outputted from the multiplexer corresponding to transmit signals into RF signals, each RF transmission link comprises a modulator (1161) connected in series, an upconverter (1162), and a power amplifier (1163).
8.如权利要求7所述的多载波MIMO通信系统,其特征在于,该多载波接收信号处理器(210)包括:一第二接收射频链路组011),用于将接收到的射频信号进行解调和变频处理,获得相应的码流;一第二MIMO接收信号处理器012),用于根据该码流产生相应的用户反馈数据,同时还原并输出用户数据;以及该反馈信息处理器(220)包括:一MIMO发送信号处理器021),用于将用户反馈数据转化成反馈信号;一第二发送射频链路组022),用于将该反馈信号转化为相应的射频信号。 8. The multi-carrier MIMO communication system as claimed in claim 7, wherein the received multicarrier signal processor (210) comprises: a second receiving RF link group 011), for converting the received radio frequency signal performs demodulation and frequency conversion processing, to obtain the corresponding code stream; a second MIMO reception signal processor 012), for generating respective user feedback data according to the code stream, and outputs while reducing user data; and the feedback information processor (220) comprising: a MIMO transmit signal processor 021), for user feedback data into a feedback signal; transmitting a second radio frequency link group 022), the feedback signal into a corresponding RF signal.
9. 一种多载波MIMO通信方法,其包括以下步骤:(a)在接收端,根据发送端的发送天线与接收端的接收天线之间的信道衰落状况产生反馈信号,并将该反馈信号反馈给发送端;(b)在发送端,接收该反馈信号,根据该反馈信号产生调度信息;(c)在发送端,根据调度信息将所调度用户的数据形成对应的多载波发射信号,通过对应的发送天线将该多载波发送信号发送出去;以及(d)在接收端,根据接收的发射波束还原用户数据;其中,步骤(c)包括以下步骤:i)根据调度信息选择所要调度的用户;ii)根据调度信息将所调度用户的用户数据分成相应的码流;iii)根据调度信息将各个码流分配到指定子载波的指定发射波束上,分别将分配到同一空域信道的针对所有子载波上的码流进行IFFT变换,在每个空域信道中输出与发送天线分别对应的并行的多路串行时域信号;iv) A multi-carrier MIMO communication method, comprising the steps of: (a) at the receiving side, generating a feedback signal according to a channel between the receiving antenna transmitting end transmitting antenna and the receiving terminal fading conditions, and the feedback signal to the transmitter end; (b) at the transmitting end, to receive the feedback signal, generating scheduling information according to the feedback signal; (c) at the transmitting end, according to the scheduling information the scheduled user data to form a multi-carrier transmit signals corresponding through a corresponding transmission the antenna sends the multi-carrier transmission signal out; and (d) at the receiving end, the data according to the transmission beam reducing the received user; wherein the step (c) comprises the following steps: i) the scheduling information is selected according to the scheduled user; ii) on iii) the scheduling information to each code stream assigned to the specified subcarrier specified transmit beams according to respectively allocated to the same spatial channel all subcarriers for; according to scheduling information to the scheduled user's user data into respective streams time-domain signal multiplexed serial bit stream for the IFFT, each spatial channel corresponding to the output of the transmitting antennas in parallel; IV) 将每路串行时域信号依次进行加权处理和延迟处理形成对应的发送信号,并将对应于同一发送天线的发送信号进行叠加,然后对叠加后形成的多载波发射信号插入循环前缀,从对应的发送天线发射出去。 Each serial channel time-domain signal sequentially weighted and delayed to form the corresponding transmission signal processing and transmission signal corresponding to the same transmission antenna is superimposed multicarrier transmission signal and a cyclic prefix is ​​inserted after the formation of superimposed, from the corresponding transmitting antenna out.
10.如权利要求9所述的通信方法,其中,该调度信息包括所要调度的用户、每个用户所支持的码流以及发送各个码流的指定子载波上的指定发射波束。 10. The communication method according to claim 9, wherein the scheduling information includes the scheduled users to be specified on the designated subcarriers for each user and supports the transmission of each stream stream transmission beam.
11.如权利要求10所述的通信方法,其中,该反馈信号包括在每个子载波上,对于该接收端来说最好的发射波束的组合、该最好发射波束组合中每个发射波束所对应的信干比。 11. The communication method according to claim 10, wherein the feedback signal comprises on each subcarrier, to the receiving end is a combination of best transmit beams, the best transmit beams for each transmit beam of the composition corresponding signal to interference ratio.
12.如权利要求11所述的通信方法,其中,该反馈信号进一步包括每个子载波上对每个接收端干扰最小的多个发射波束的组合。 12. The communication method according to claim 11, wherein the feedback signal further comprises a combination of minimum interference on each subcarrier of each of the plurality of transmit beam receiving end.
13.如权利要求10所述的通信方法,其中,该反馈信号包括在每个子载波上,对于该接收端来说最好发射波束的组合、该最好发射波束的组合中每个发射波束所对应的等效信道增益、对该接收端干扰最小的发射波束的组合以及该组合中的每个发射波束对该接收端最好发射波束的性能损失比。 13. The communication method according to claim 10, wherein the feedback signal comprises on each subcarrier, for which the best transmit beams for receiving end combination, the best transmit beams for each combination of the transmit beam corresponding equivalent channel gain, the combination of minimum interference receiving end transmit beam and each transmit beam in this combination than to the loss of performance of the receiving end the best transmit beams.
14.如权利要求11所述的通信方法,其中步骤(b)包括以下步骤:1)设置用户调度列表和已分配发射波束列表为空;2)对于每一个子载波,执行以下步骤i)至iii):i)比较所有反馈回来的信干比,选出一个有最大信干比的用户加入到用户调度列表中,并把相应的发射波束加到已分配发射波束列表中;ϋ)然后,比较所有反馈回来的信干比,从未调度的用户中选出具有最大的信干比的用户,将其加入到用户调度列表中,并把相应的发射波束加到已分配发射波束列表中;iii)重复步骤i)和ii),直至完成在该载波上的用户调度;3)最后,根据最后针对所有子载波所生成的用户调度列表和已分配发射波束列表,进行系统的用户调度。 14. The communication method of claim 11, wherein step (b) comprises the following steps: 1) setting user scheduling list and allocated transmit beam list is empty; 2) for each subcarrier, the following steps i) to iii): i) comparing all the fed back signal to interference ratio, a user selected maximum SINR scheduling is added to the user list and added to the corresponding beam transmit list allocated transmit beam; ϋ) then, comparing all the fed back signal to interference ratio, never scheduled user having the user selected maximum signal to interference ratio, and to add to the list of user scheduling, and the corresponding transmit beam has been added to the list allocated transmit beam; iii) repeating steps i) and II), until the scheduled user on the carrier is completed; 3) Finally, according to the final scheduled user for all subcarriers generated list and a list of allocated transmit beam, the system user scheduling.
15.如权利要求12所述的通信方法,其中步骤(b)包括以下步骤:1)设置用户调度列表和已分配发射波束列表为空;2)对于每一个子载波,执行以下步骤i)至iii):i)比较所有反馈回来的信干比,选出一个有最大信干比的用户加入到用户调度列表中,并把相应的发射波束加到已分配发射波束列表中;ii)针对用户调度列表中的用户,从其对应的组合中找出相应的干扰最小的发射波束, 然后,根据该干扰最小的发射波束找出其所对应的最大信干比的用户,并将该用户加入到用户调度列表中,同时,将该用户对应的发射波束加到已分配发射波束列表中;iii)重复步骤i)和ii),直到完成在该子载波上的用户调度;3)最后,根据最后针对所有子载波生成的用户调度列表和已分配发射波束列表,进行系统的用户调度。 15. The communication method of claim 12, wherein step (b) comprises the following steps: 1) setting user scheduling list and allocated transmit beam list is empty; 2) for each subcarrier, the following steps i) to iii): i) comparing all the fed back signal to interference ratio, selecting a maximum signal to interference ratio of the user is added to the list of user scheduling, and the corresponding transmit beam has been added to the list allocated transmit beam; ii) for the user scheduling users on the list, find the corresponding minimum interference from its corresponding transmit beam combination, then its corresponding users find the maximum signal to interference ratio based on the minimum transmission beam interference, and the user is added to the user scheduling list, while the transmission beam corresponding to the user is added to the list allocated transmit beam; iii) repeating steps i) and II), until the user scheduled on sub-carriers; 3) Finally, the last the scheduling sub-carriers to generate a list of all users and allocated transmit beam listing, the system user scheduling.
16.如权利要求13所述的用户调度方法,其中步骤(b)包括以下步骤:1)设置用户调度列表和已分配发射波束列表为空;2)对于每个子载波,将重复以下步骤i)至iv):i)比较所有反馈回来的等效信道增益,选出一个有最大等效信道增益的用户加入到用户调度列表中,并把相应的发射波束加到已分配发射波束列表中;ϋ)针对用户调度列表中的用户,从其对应的组合中找出相应的干扰最小的发射波束, 然后该干扰最小的发射波束所对应的最大信干比的用户;iii)根据反馈的性能损失比,判断该用户的加入是否增加了系统容量,如果该用户的加入使得系统容量增加,则将该用户加入到用户调度列表中,同时,将该用户对应的发射波束加到已分配发射波束列表中;如果该用户的加入使得系统容量降低,则不将该用户加入到用户调度列表,并结束在该子载波上的用 16. The user scheduling method according to claim 13, wherein step (b) comprises the following steps: 1) setting user scheduling list and allocated transmit beam list is empty; 2) for each sub-carrier, to repeat the following steps i) to iv): i) comparing all the fed back equivalent channel gains, selecting a maximum equivalent channel gain is added to the user list of user scheduling, and the corresponding transmit beam has been added to the list allocated transmit beam; ϋ ) for the user in the user scheduling list, find the corresponding minimum interference from transmit beam corresponding to a combination, then the maximum signal interference minimum transmission beam corresponding to the user dry ratio; iii) the performance loss ratio feedback determining whether the user is added to increase the system capacity, if the user was added such that the system capacity is increased, then the user is added to the list of user scheduling, at the same time, the transmission beam corresponding to the user is added to the list allocated transmit beam ; If the user was added such that the system capacity decreases, and the user is not added to the list of scheduled users, and on the end use of the subcarriers 调度;iv)当该用户加入后,依次重复步骤i)和iii),直到在该子载波上的用户调度结束;3)根据最后针对所有子载波的用户调度列表和已分配发射波束列表,进行系统的用户调度。 Scheduling; IV) when the user is added, successively repeating steps i) and III), the end user scheduling until the sub-carriers; 3) transmit beams list according to the allocated for the user scheduling list of all subcarriers and performs user scheduling system.
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