CN100571099C - Feedback control method, apparatus and transceiver - Google Patents

Feedback control method, apparatus and transceiver Download PDF

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CN100571099C
CN100571099C CN 200610058434 CN200610058434A CN100571099C CN 100571099 C CN100571099 C CN 100571099C CN 200610058434 CN200610058434 CN 200610058434 CN 200610058434 A CN200610058434 A CN 200610058434A CN 100571099 C CN100571099 C CN 100571099C
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feedback
prediction
channel state
tti
current
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CN101043290A (en
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斌 李
杜颖钢
卫 阮
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华为技术有限公司
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Abstract

本发明涉及无线通信技术,特别涉及一种反馈控制方法、装置及收发信机,以解决现有技术中由于反馈信息被延迟而导致的无法根据信道的实时状态进行反馈控制的问题;所述方法包括:接收端预测与当前发射时间间隔TTI相距一个收发时延之后的信道状态,所述收发时延为发射端与接收端之间收发信息的时间间隔;接收端将所述信道状态预测结果的指示信息反馈给发射端。 The present invention relates to wireless communication technologies, particularly to a method for feedback control, and the transceiver means to solve the problems of the prior art since the feedback information is not caused by delayed feedback control based on the real-time state of the channel; the method comprising: a receiving end spaced predicted TTI channel state after the transceiver delay and a current transmission time interval, the transceiver transmitting and receiving information between the time delay of transmitting end and the receiving end of the spacer; receiving end of the channel state prediction result indication feedback to the transmitting end. 同时周期性判断信道变化状态以决定执行预测反馈还是反馈当前值。 While periodically determining the channel variation state to perform prediction decision feedback or current feedback value. 所述装置和收发信机主要包括信道状态检测模块和反馈执行模块。 The device and the transceiver includes a channel state feedback execution module and a detection module. 应用本发明所述技术方案在一定程度上减小了由于反馈信息延时对发射端进行速率控制的影响,有效提高了通信系统的容量。 The technical solution of the present invention is applied to reduce the delay due to the feedback information for controlling the rate affect the transmitting end, the effective capacity of the communication system is improved to some extent.

Description

一种反馈控制方法、装置及收发信机 One kind of feedback control method, and a transceiver apparatus

技术领域 FIELD

本发明涉及无线通信技术,特别涉及一种反馈控制方法、装置及收发信机。 The present invention relates to wireless communication technologies, particularly to a feedback control method, and a transceiver apparatus. 背景技术 Background technique

MMO (Multi-Input Multi-Output,多输入多输出)技术在无线通信系统中的应用越来越受到重视,无论是从增加系统容量的角度还是改善系统性能的角度,MMO都有其不可替代的优越性。 MMO (Multi-Input Multi-Output, MIMO) technology in a wireless communication system, more and more attention, both from the point of view or to increase system capacity viewpoint of improving the system performance, MMO has its irreplaceable superiority. MIMO主要分为两大类, 一类是以最大化分集增益为目的的空间分集技术,另一类则是以最大化数据速率为目的的空分复用技术。 MIMO divided into two categories, one category is to maximize diversity gain for the spatial diversity purposes, and those based on the data rate to maximize space division multiplexing purposes.

MIMO技术通常又是和自适应编码调制(AMC)技术结合在一起的,其中,自适应编码调制技术是指接收端将测量的信道状态信息(Channel State Information, CSI)反馈给发射端,发射端根据接收端提供的信道质量等反馈信息选择合适的信道编码及调制等方式,典型地如编码类型、编码速率、调制方式(QPSK/16QAM等),通常,在有限反馈的情况下,发射端获得的CSI是通过反馈MCS (Modulation & Coding Scheme)索引来实现的。 MIMO technology is generally and adaptive modulation and coding (AMC) technique together, wherein the adaptive coding modulation technique refers to channel state information (Channel State Information, CSI) fed back to the transmitting end to the receiving end of the measurement, the transmitting end the feedback information selection channel quality like the receiving end to provide a suitable channel coding and modulation, etc., typically such as coding type, coding rate, modulation scheme (QPSK / 16QAM, etc.), typically, in the case of limited feedback, the transmitting end is obtained the CSI is achieved by the feedback MCS (Modulation & Coding Scheme) index. 即将发射端支持的所有可能的MCS制成一张表,同时保存在发送端和接收端。 MCS is about to launch all possible side support is made a table, while preserving the sending and receiving ends.

现有发送速率控制的过程中,首先接收端根据信道估计得到当前的信道矩阵H,以此来计算每个发送天线当前的信噪比SINR^)(其中i是发送天线索引), 由当前的SINR^来确定MCS并反馈对应的索引。 Conventional transmission rate control process, first, the receiving terminal according to the channel estimation to obtain a current channel matrix H, in order to calculate the current SNR for each transmit antenna SINR ^) (where i is a transmission antenna index), by the current and determining SINR ^ MCS feedback corresponding index. 发送端根据索引,查表确定采用哪种调制编码方式,控制下一个时刻TTI ( Transmission Timing Interval) 的发送速率。 The transmitting end according to the index, look-up table to determine which modulation and coding scheme employed, under control of a timing TTI (Transmission Timing Interval) of transmission rate. 从而实现了发送速率的实时控制。 Enabling real-time control of the transmission rate. 但是在以往的技术中,都是采用反馈当前的SINR^),而当前的SINR(i)经过反馈有一定的时延,最小的时延为一个TTI,即当前TTI的SINR(j)信息在下个TTI被发送端使用。 However, in the conventional art, and are based on the current feedback SINR ^), and the current SINR (i) through the feedback has a time delay, a minimum delay of TTI, i.e., the current TTI of SINR (j) the following information th TTI is sent by the client.

下面以多码字MCW( Multiple Code Word )传输模式为例进一步详细说明,如图1所示,图1为MCW传输模式结构图,设有4个发送天线、4个接收天线。 Below multiple codeword MCW (Multiple Code Word) transmission mode described in further detail as an example, shown in FIG. 1, FIG. 1 is a configuration diagram of MCW transmission mode, with four transmit antennas, four receive antennas. 数据流经过緩冲/分路器串并变换为4路,每一路分别进行编码调制后,从发送天线发送出去;数据流经信道H传输到接收天线,接收端对每根天线上接收到的信号进行检测解码。 Buffered data stream splitter / parallel conversion is 4, respectively, after each path code modulation, transmitted from the transmitting antenna; H channel data stream is transmitted to the receiving antenna, a receiving end for receiving each of the antennas signal detection decoding. 各个天线根据每个天线的信道状态(Channel Quality Indicator, CQI)可以采用不同的编码调制方式(MCS )。 Each antenna according to a channel state of each antenna (Channel Quality Indicator, CQI) can use different coding and modulation scheme (MCS). 信道较好的采用高速率的MCS,信道较差的采用低速率的MCS,这样方式能够使信道容量达到最大,称为灌水定理。 Channel preferably uses the MCS high rate, poor channel of the MCS with a low rate, in such a manner that the channel capacity can be maximized, called irrigation theorem. 灌水的效果与反馈的CQI的准确性直接相关。 Irrigation effect is directly related to the accuracy of CQI feedback. 在实际的系统中,通常在4妻收端确定MCS,然后通过反向信道把MCS索引通知发射端, 在反馈过程中有时延T,所以发射端得到的MCS实际上反映的是反馈时延T 以前的信道状态。 In an actual system, 4 is usually determined in the receiving end MCS wife, and then through a reverse channel to the transmitting end notification MCS index, there is delay in the feedback process T, the transmitting end is actually obtained reflects the MCS feedback delay T previous channel state. 如图2所示,图2为现有反馈控制方法原理示意图,接收端在t0时刻根据CQI选择的各天线的MCS被发射端用于控制t。 2, FIG. 2 is a schematic view of the principle of the conventional feedback control method, a receiving end is transmitted at time t0 t control terminal for each antenna according to the MCS of the CQI selection. +T时刻的数据流。 The data stream at time T +.

由于MIMO信道是个时变的信道,采用被延迟后的过期MCS不能准确的反映信道的状态,严重影响了灌水的效果,不能使系统容量达到最大,这种缺陷在现有所有同类反馈控制方式中同样存在。 Since the MIMO channel is time-varying channel, using expired MCS may not accurately reflect the channel after being delayed state seriously affecting the irrigation effects, not the system capacity is maximized, such defects in the prior all similar feedback control mode also exists.

发明内容 SUMMARY

本发明提供一种反馈控制方法、装置及收发信机,对信道状态进行预测, 并反馈预测结果,以解决现有技术中由于反馈信息被延迟而导致的无法根据信道的实时状态进行反馈控制的问题; The present invention provides a feedback control method, device and a transceiver on the channel state prediction and feedback prediction result to solve the prior art since the feedback information is delayed caused by not performing feedback control in accordance with the real-time state of the channel of problem;

进一步,本发明所述方法根据信道状态决定是否执行预测反馈,以解决信道状态变化过快时,预测反馈会带来较大误差的问题。 Further, the method of the present invention decides whether to perform prediction feedback, to address the channel state change too fast, the feedback will bring large prediction errors according to the channel state.

本发明构的通过如下技术方案实现: Configuration of the present invention is achieved by the following technical solutions:

一种无线通信系统中的反馈控制方法,包括如下步骤:接收端根据设定的第一判决周期,比较当前第一判决周期中每一个TTI对应的反馈预测值产生的预测误差和反馈实测值产生的实测误差,当全部预测误 Feedback control method in a wireless communication system, comprising the steps of: receiving a first end of the decision period set in accordance with the prediction error, and feedback current of the first comparator Found decision feedback period corresponding to the predicted value generated for each TTI generation the measured error when all the prediction error

差或设定个数的预测误差小于实测误差时,在下一个判决周期中的每一个TTI, When the difference or prediction error is less than the set number of the measured error, the next decision period in each of the TTI,

利用当前第一判决周期中确定的最优的有限响应滤波器预测与当前发射时间 Determining a first period using the judgment of the current best prediction filter with limited response to a current Transmission Time

间隔TTI相距一个收发时延之后的信道状态并将所述信道状态预测结果的指示信息反馈给发射端,所述收发时延为发射端与接收端之间收发信息的时间间隔;否则在下一判决周期中的每一个TTI反馈信道状态检测结果的指示信息; Information indicating the channel state and channel state predictor spaced apart a transceiver delay after TTI feedback to the transmitting end, the time delay of the transceiver transmitting and receiving information between the transmitter and receiver spacing; otherwise, the next decision each TTI period detection result of the channel state indication information feedback;

接收端根据^L置的一组不同系数的有限响应滤波器,在当前第一判决周期中,同时计算每一个有限响应滤波器的预测误差,并根据预测误差选择所述最优的有限响应滤波器。 The receiving end of a set of opposing ^ L finite response filter coefficients different in the first decision of the current cycle, while the prediction error is calculated for each finite response filter, and selecting the optimal finite response filtering the prediction error device.

其中,所述最优有限响应滤波器的选择方法是:对于有限响应滤波器在同一个TTI的一组预测误差中,记录最小误差对应的有限响应滤波器,最后将当前判决周期中最小误差出现次数最多的有限响应滤波器作为最优有限响应滤波器,如果最小误差出现次数对应两个或以上有限响应滤波器,则再随机选择或根据选择其中预测误差平均值最小的一个作为最优有限响应滤波器。 Wherein the method of selecting the optimal finite response filter is: for a finite response filter in the same TTI set of prediction error, the recording error corresponding to the minimum finite response filter. Finally, the current smallest period judgment errors occurring most finite response filter as the optimum number of finite response filters, an error occurs if the minimum number of times corresponding to two or more finite response filters, the randomly selected or selected in accordance with a smallest prediction error as an optimal average response finite filter.

上述方法中,在4妄收端与发射端建立信道后和/或重新开始预测的首个第一判决周期内的每一个TTI,利用预先指定的有限响应滤波器或自适应滤波器预测与当前发射时间间隔TTI相距一个收发时延之后的信道状态并将所述信道状态预测结果的指示信息反馈给发射端;或者直接反馈信道状态检测结果的指示"息。 The method described above, after establishing a channel terminating at 4 jump transmitting side and / or re-start of the first predicted TTI in each of the first decision period, finite response filter or an adaptive prediction filter of the current pre-designated transmission time interval TTI apart channel state and channel state prediction result after the transceiver delay indication information feedback to the transmitting end; or direct feedback of the channel state detection result indicates "message.

所述的指示信息是指根据预测结果或检测结果确定的调制编码方式MCS 索引;接收端利用有限响应滤波器或者自适应滤波器预测距离当前发射时间间隔TTI 一个收发时延之后的信道的冲击响应值,然后根据该冲击响应值计算天线的信噪比,再根据天线的信噪比确定对应的MCS索引;当用于多输入多输出MIMO系统时,才艮据冲击响应值分别计算每一个天线的信噪比并确定对应的MCS索引,然后将每一个天线对应的MCS索引及该天线的标识信息全部反馈给发射端。 The indication information is determined modulation and coding scheme MCS index according to the prediction result or the detection result; finite response filter receiving end or after the adaptive channel prediction filter from a current Transmission Time Interval TTI transceiver delay impulse response value is then calculated based on the SNR of the antenna impulse response value, and then determine the signal to noise ratio corresponding to MCS index antenna; when used in multiple input multiple output MIMO system, only Gen impulse response values ​​were calculated according to each antenna and determining the signal to noise ratio corresponding to MCS index and the identification information of each antenna corresponding to an MCS index and the antenna to the transmitting end of all reactions.

为实现上述方法,本发明提供一种反馈控制装置,包括: To achieve the above-described method, the present invention provides a control device for feedback, comprising:

信道状态检测模块,用于检测当前TTI的信道状态或预测与当前TTI相距设定时延之后的信道状态,具体包括:根据设定的第一判决周期,比较当前第一判决周期中每一个TTI对应的反馈预测值产生的预测误差和反馈实测值产生的实测误差,当全部预测误差或设定个数的预测误差小于实测误差时,在下一个判决周期中的每一个TTI,利用当前第一判决周期中确定的最优的有限响应滤波器预测与当前发射时间间隔TTI相距一个收发时延之后的信道状态将所述信道状态预测结果的指示信息反馈给发射端,所述收发时延为发射端与接收端之间收发信息的时间间隔;否则在下一判决周期中通过所述反馈执行模块的每一个TTI反馈信道状态检测结果的指示信息; Channel status detecting means for detecting a channel state of the current TTI or the predicted distance and the current TTI channel state after the set time delay comprises: a first decision according TTI per set period, the first decision comparing the current period Found feedback error and the prediction error generated measured values ​​corresponding to feedback values ​​generated by the prediction, the prediction error when the number of all the prediction error is less than measured error or set, in the next decision cycle the TTI for each, using the current first decision period determined optimal prediction TTI finite response filter away a channel state after the transceiver delay information indicating the channel state prediction result is fed back to the transmitting end a current transmission time interval, the transceiver is a transmitter delay and the reception time interval between the end of the transmit and receive information; otherwise, by performing the feedback information indicative of each TTI feedback channel state detection result of the judgment in the next module period;

反馈执行模块,连接所述信道状态检测模块,用于根据信道状态检测结果或预测结果确定对应的指示信息,并根据该指示信息生成反馈信息; Performing a feedback module connected to the channel condition detection means for determining the corresponding indication information according to a channel state detection result or outcome, and information generating feedback information according to the indication;

预测滤波器选择模块,连接所述信道状态检测模块,用于周期性选择适用的预测滤波器并根据选择结果向所述信道状态检测模块输出相应的控制信息, 具体包括:根据设置的一组不同系数的有限响应滤波器,在当前第一判决周期中,同时计算每一个有限响应滤波器的预测误差,并才艮据预测误差选4奪所述最优的有限响应滤波器。 Prediction filter selection module, connected to the channel state detecting means for periodically selecting and outputting the prediction filter applies the appropriate control information to the channel state according to the selection result detecting module comprises: a set of different settings finite response filter coefficients, the first decision in the current cycle, while the prediction error is calculated for each finite response filter, and only the prediction error is selected according to the Gen 4 wins optimal finite response filter.

本发明还提供一种使用上述反馈控制装置的收发信机。 The present invention further provides a transceiver using the feedback control means.

本发明技术方案的有益效果如下:本发明所述技术方案中,接收端对一个收发时延之后的信道状态进行预 Advantageous Effects aspect of the present invention is as follows: The technical solution of the present invention, a receiving end of the channel state after the transceiver delay pre

测,并反馈预测结果,佳JL射端在执行反馈控制时,可以根据信道当时的状态进行控制,在一定程度上减小了由于反馈信息延时对发射端进行速率控制的影响,有效提高了通信系统的容量; Measuring, feedback and prediction result, good JL exit end when performing the feedback control, can be controlled by the state of the channel at that time, since the feedback reduces the rate affect the time delay for controlling the transmitting end, improve to a certain extent capacity of the communication system;

进一步,本发明考虑到信道状态变化过快时,不适合执行预测反馈的问题, 根据设定周期,周期性对信道变化状态进行判决,并根据信道状态决定是否执行预测反馈或反馈当前检测值,进一步提高了反馈控制的精度; Further, the present invention contemplates the channel state change too fast, not suitable for the implementation of prediction feedback, according to the set cycle, periodicity of the channel variation state decision, and decides whether to perform prediction feedback or a feedback current detected value according to channel state, further improve the accuracy of the feedback control;

更进一步,本发明在周期性判决信道状态变化的同时,对预测滤波器的预测误差进行判断或调整,可以逐步提高预测精度。 Still further, the present invention while periodically varying channel state judgment, prediction error of the prediction filter is determined or adjusted, can gradually improve the prediction accuracy.

附图说明 BRIEF DESCRIPTION

图1为包括4个发送天线、4个接收天线的MCW传输模式结构图; 图2为现有反馈控制方法原理示意图; 图3为本发明所述反馈控制方法原理示意图; 图4为本发明所述反馈控制装置的结构示意图; 图5本发明所述使用图4所述反馈控制装置的收发信机结构示意图; 图6为利用仿真数据对本发明技术方案与现有技术的性能进行对比说明曲线示意图。 FIG 1 as comprising four transmitting antennas, MCW transmission mode structure of Figure 4 receive antennas; FIG. 2 is a principle diagram of a conventional feedback control method; FIG. 3 a schematic diagram of a control method of the present invention, the principle of feedback; the present invention FIG. 4 said structural diagram of the feedback control means; a schematic diagram of the transceiver structure of Figure 5 using the present invention, the feedback control means of FIG. 4; and FIG. 6 is a simulation using the data of the aspect of the invention and a graph comparing the performance of prior art schematic .

具体实施方式 Detailed ways

以无线移动通信MIMO系统为例,设该系统包括4个发送天线和4个接收天线,本发明所述^J赍控制方法的原理如图3所示,为减少由于时变的信道引起的反馈的各天线的CQI的不准确性,在to时刻,接收端收发信机根据导频估算出信道冲击响应函数值H(to),则:7^00) ;?12(/o) a13(/o) /2140。 In a wireless mobile communication system as an example MIMO, provided the system includes four transmitting antennas and four receiving antennas, the present invention ^ J turn to the control method shown in FIG principle, to reduce the time-variant channel feedback due 3 inaccuracy CQI of each antenna in to the time, the receiving end the transceiver according to the pilot estimated channel impulse response function value H (to), then: 7 ^ 00); 12 (/ o) a13 (/? o) / 2140. )- ) -

;?2,(/10) /z22oo)力23柳/?24 010) ;? 2, (/ 10) / z22oo) Liu force 23/24010)?

/231柳/Z3200) /233, /234柳 / 231 willow / Z3200) / 233, / 234 willow

/z4100) &200) /14300) /?44, / Z4100) & 200) / 14300) /? 44,

其中,~(,0)表示第j个发送天线到第i个接收天线的信道冲击响应函数, Wherein - (, 0) represents the j-th transmit antenna to the i-th receive antenna channel impulse response function,

由于信道的变化是连续的,可以根据to及to以前的信道冲击响应函数^.(W)、 Due to changes in the channel is continuous, according to the function and the response to the previous channel impulse ^. (W),

~(/o—r)、 ~々o-2r)、 ...i殳计合适的预测滤波器来预测to+T时刻的信道响应函 ~ (/ O-r), ~ 々o-2r), ... i Shu meter suitable prediction filter to predict the time to + T channel response function

数&々0 + r),其中T是CQI/MCS反馈的延时时间,即接收端和发射端收发信息的延时, 一般为1个或多个TTI。 Number & 々0 + r), where T is the delay time CQI / MCS feedback, i.e., a receiving end and a transmitting end of the transceiver delay information, typically one or more TTI.

接收端根据预测得到的to+T时刻的信道响应函数&.(fO+r),计算信道冲击响应预测值H(t0+T),并根据li(to+T)计算出t0+T时刻各个天线的信噪比SINR(j), j为发送天线的标号,最后根据该预测得到的SINR/j、选择对应的MCSfj、索引, 并将各天线的MCS。 Receiving end according to the channel to the prediction obtained + T time response function &. (FO + r), in response to the predicted value H (t0 + T) is calculated channel impulse, and Li (to + T) is calculated according to the T0 + T time each the antenna noise ratio SINR (j), j is the reference transmitting antenna, based on the prediction finally obtained SINR / j, select the corresponding MCSfj, index, and MCS of each antenna. 索引对应天线的标识信息一起反馈给发射端。 Feedback corresponding to the identification information of the index along the antenna to the transmitting end.

假设反馈延时T保持不变(事实上反馈延时T的变化4艮小),则反馈信息经过一个反馈延时T后被发射端接收,发射端在to + T时刻应用预测得到的MCS①索引确定对应的MCS(j、来对各天线进行编码调制,从而减少了因反馈信息的延时带来的影响。 Suppose feedback delay T remains unchanged (in fact change in feedback delay T Gen 4 small), the feedback information through a feedback delay T after the transmitting end receives, at the transmitting end in time T to + MCS① index obtained Prediction determining the corresponding MCS (j, performs coding and modulation of each antenna, thereby reducing the influence due to the delay caused by the feedback information.

预测滤波器可以采用有限响应滤波器、自适应滤波器等,由于预测滤波器并不是在所有情况下都能有效的估计预测to+T时刻的信道,比如用户高速运动的时候,信道变化过快,即使采用预测,也无法有效的跟踪信道的变化。 Prediction filters may be finite response filter, an adaptive filter or the like, since the prediction filter is not in all cases can be effectively estimated prediction time T to + channels, such as the user moving at high speed when the rapid channel variation , even with the prediction, can not effectively track the channel changes. 这时反馈信道状态信息已经没有意义,更适合采用开环的控制方式。 Feedback channel state information at this time has no meaning, more suitable for open-loop control. 在开环的控制方式中,发射端采用速率较低的MCS,不需要信道状态的实时信息。 In the open-loop control mode, the transmitting end with a lower rate of the MCS, does not require real-time channel state information. 因此, 可以周期性的对信道的变化情况进行判决,然后根据判决结果决定是否在下一个周期进行采用闭环控制。 Thus, periodic changes in the channel for making decisions and then decide whether to use a closed-loop control cycle according to the next decision result.

一种判决方法是将所有相邻两个TTI的信噪比检测值的差值和对应的经验阈值作比较,当所有差值全部大于所述经验阈值时,判定信道状态变化幅度超出设定范围,则应该在下一个判决周期采用开环的控制方式,不需要进行预测;反之,判定信道状态变化幅度在设定范围内,则应该在下一个判决周期的采用闭环的控制方式。 One kind of decision method is to compare the difference between all adjacent two TTI SNR detection values ​​and the corresponding empirical threshold, when all of the difference is greater than all the empirical threshold, determining a channel state change of amplitude exceeds the set range , a decision should be the next cycle using the open loop control mode, prediction is not required; otherwise, the variation width of the channel state is determined within a set range, the following control should be employed in a closed loop decision period.

在确定采用闭环的情况下,还需要判别是采用反馈实测值,还是采用反馈预测值。 In the case of closed-loop determining, discrimination is the use of feedback required found, or the use of feedback prediction value. 因为,采用预测的时候,有可能由于滤波器系数选择的不合适,或者自适应滤波器系数没有收敛等因素使得预测的结杲不比未预测的效果好。 Because, when using prediction, there is a possibility of inappropriate filter coefficient selection, the adaptive filter coefficients or factors such that the effect does not converge the predicted junction Gao unpredicted than good. 因此,为了增加系统的强壮性,需要进行判别来确定是否进行预测。 Therefore, in order to increase the robustness of the system, the need for judgment to determine whether to predict.

一种判决方法是比较反馈当前值和反馈预测值产生的误差,选择其中误差较小的执行反馈,由于这种方法在判决是否反馈预测值的同时,可以评估预测滤器的精度,因此优先选用,下面给出具体的判决方法。 To a decision in the feedback error is to compare the current value and the prediction value generated by the feedback, wherein the selection execution feedback error is small, since this method while deciding whether feedback prediction value, the prediction accuracy of the filter can be evaluated, and therefore preferred, a specific judgment method is given.

以N个TTI作为一个判决周期,对于每一个TTI,分别根据to时刻信道参数H(to)、 to+T时刻的预测值H(to+T)、以及to+T时刻的实测值H(to+T)来计算对应SINR(to)、 S腿(tn+T)、 SINR(to+T),计算: Of N TTI as a decision period, for each TTI, respectively, according to the time channel parameters H (to), to + T timing predicted value H (to + T), and to + T time Found H (to + T) corresponding to the calculated SINR (to), S leg (tn + T), SINR (to + T), is calculated:

diff(to+T)=|SINR(to)-SINR(to+T)| 这里,diff(to+T)可以被认为;l^馈的未经预测的to时刻的当前值,相对于to+T时刻的实测值之间的i吴差。 diff (to + T) = | SINR (to) -SINR (to + T) | Here, diff (to + T) may be considered; l ^ fed without a predicted current value to time with respect to + i Wu difference between the measured value T of the time.

鹏to+T) =|SINR(tn+TVSINR(tn+T、l 这里,逛级to+T)可以被认为是反馈的由to及to以前的值预测得到的to+T 时刻的预测值相对于to+T时刻的实测值之间的误差,即预测误差。 Peng to + T) = | SINR (tn + TVSINR (tn + T, l where visiting stage to + T) may be considered to get by to and to the value of the predicted previous feedback + predicted value at time T relative to to + error between the measured value of time T, i.e., the prediction error.

设M=diff(WD- diff(tn+T) M为反馈当前值和反馈预测值两种方案产生的反馈值误差的比较值。当M 小于0时,说明反馈预测值比反馈当前值有更大的误差,反馈预测值的方案不如反馈当前值的方案来得好。反之,M大于O,则说明反馈当前值的误差较大, 采用反馈预测值的方案比较好。 Setting M = comparison value of the feedback error diff (WD- diff (tn + T) M is a current feedback value and the predicted values ​​of the two feedback schemes generated when M is less than 0, the predicted values ​​are described feedback value is more than the feedback current scheme large error, the predicted value of the feedback current feedback scheme inferior to good value. On the contrary, M is greater than O, then the current value of the feedback error is large, the feedback scheme using the predicted value is better.

在实际系统中,由于考虑到反馈预测值的方案相对反馈当前值的方案有附加的复杂度。 In an actual system, taking into consideration the predicted value of the feedback scheme of the current feedback value relative additional program complexity. 因此当两者性能相当时,选择反馈当前值的方案。 Thus when both performance equivalent program selection feedback current value. 为了实现这种功能,可以给M设定一个大于零的阈值,设为Mq, Mo的值可以根据经验值确定。 To achieve this functionality, M is set to be greater than a threshold value of zero, is set Mq, Mo value may be determined according to empirical values. 比如,可以取M(pO.Pdiff(to+T),其中*为乘号。 For example, you can take M (pO.Pdiff (to + T), where * is the multiplication sign.

当M大于Mo时,反馈预测值的方案优于反馈当前值的方案;M小于Mo 时,^^馈预测值的方案性能不够理想,则可以尝试更换预测滤波器系数或不使用预测滤波器。 When M is larger than Mo, the predicted value of the feedback scheme is better than the current value of the feedback scheme; when M is less than Mo, program performance prediction value fed ^^ not ideal, it can replace the prediction filter coefficients using predictive filter or not.

在一个判决周期内,即N个TTI内,如果采用某組滤波器系数预测得到的M值有K次大于Mo,则在下一个周期使用该滤波器进行预测。 In a decision period, i.e., within the TTI of N, if M values ​​for a set of filter coefficients are predicted K times greater than Mo, the next period using the prediction filter. 反之,如果N 个TTI内没有滤波器满足上述条件,则在下个周期内不进行预测,而采用反馈当前值的方案。 Conversely, if there is no filter over N TTI above conditions are satisfied, then the next cycle is not to predict the current value of the feedback scheme employed. 其中,K的值由经验给出,取值范围小于N,大于O。 Wherein the value of K is given by the experience, the range is less than N, is greater than O. 如N取11, K可以取8。 The N is 11, K may take 8.

预测滤波器可以采用有限响应滤波器、自适应滤波器等。 Finite response filter prediction filter, the adaptive filter or the like may be employed. 为进一步提高预测精度,当使用有限响应滤波器时,可以在接收端设置一组优选的滤波器系数, 并在当前判决周期中,对该组滤波器中的每个滤波器的预测误差进行评估,选出使得预测误差最小的滤波器系数。 And the current decision cycle, the prediction error filter for each set of filters was evaluated to further improve the prediction accuracy, when using the finite response filter, a receiving end can be provided a preferred group of filter coefficients, , is selected so that the minimum prediction error filter coefficients. 如果该滤波器满足在一个判决周期内的M 值K次大于Mo的条件,则在下一个判决周期中使用该滤波器作为预测滤波器。 If the value of M filter satisfies a condition decision period K times greater than Mo, the next prediction filter using the filter as a judgment period. 当使用自适应滤波器时,根据当前判决周期中每一个TTI对应的预测误差逐步调整自适应滤波器的系数,减小自适应滤波器的预测误差。 When using the adaptive filter coefficients of the adaptive filter gradually adjusted according to the current decision period each TTI corresponding to a prediction error, the prediction error of the adaptive filter is reduced.

例如,采用3 阶有限响应率波器时,设 For example, when using the third-order wave of finite response, provided

~(f。+r)=a。 ~ (F. + R) = a. ~(g+fl^(f。-r)+fl2~(/。-2r),其中,"。、a,、 "2是滤波器的系数, ~ (G + fl ^ (f.-r) + fl2 ~ (/.- 2r), where, "., A ,," 2 are coefficients of the filter,

预先设置的一组滤波器的系数经过优选,如下表1所示: A set of filter coefficients is set in advance elapsed Preferably, as shown in Table 1:

表i优选的滤波器组 Preferred filter bank table i

<table>table see original document page 12</column></row> <table> <Table> table see original document page 12 </ column> </ row> <table>

表1中,每一列的第一行是滤波器的标号。 In Table 1, the first row of each column is the reference filter. 标号越大,对应的滤波器越适 The larger the numeral, the more suitable the corresponding filters

合高速运动的移动终端,第2-4行为一个滤波器的3个系数。 Together high-speed movement of the mobile terminal, a behavior 2-4 3 filter coefficients. 比如标号为l的滤波器为:["。,《,^2]=[3,-3,1];标号为9的滤波器为:[aQ,ai,a2]=[1.48,-1.43,0.75]。用户运动速度较低时使用滤波器l;运动速度较高时使用滤波器9。以上的滤波器组还可以根据要求筛选减少。 Such a filter is designated l: [, ^ 2 "."] = [3, -3, 1]; designated filter 9 is: [aQ, ai, a2] = [1.48, -1.43, 0.75] l using a filter the user velocity is low; 9. the use of a filter bank or more filters at high velocity may also be reduced according to the screening requirements.

在当前判决周期中的每一个TTI,对每一个滤波器分别计算diff(tn+T, k), 其中k是滤波器的标号,并为每个滤波器设置计数器counter(k),然后将每一个TTI对应的一组diff(tn+T, k)中,最小值对应的滤波器的计数器counter(k)增加l, N个TTI之后,取counter(k)最大的滤波器最为最优预测滤波器。 Each decision in the current TTI period, were calculated for each filter diff (tn + T, k), where k is the reference filter, and the filter is provided for each counter counter (k), then each a set diff (tn + T, k) corresponding to one TTI, the filter corresponding to the minimum counter counter (k) increasing L, after N TTI, fetch counter (k) is most optimal prediction filter filtering the largest device. 如果该滤波器的M值K次大于Mo,则在下一个判决周期中,采用此最优预测滤波器进行预测并预测值对应的MCS索引反馈给发射端。 If the value of M is K times larger than the filter Mo, a decision at the next cycle, using this optimal prediction filter for prediction and a prediction value corresponding to the MCS index fed back to the transmitting end.

再例如,采用自适应滤波器时,可以使用LMS (最小均方)自适应滤波器或者RLS (递归最小二乘)自适应滤波器等。 As another example, when adaptive filter, can be (Least Mean Square) adaptive filter or RLS (Recursive Least Square) adaptive filters using LMS. 在一个判决周期内,利用to和to + 丁时刻的实测值,对该滤波器进行训练。 In a decision period, and to the use of D to + Found time, the filter train. 当该滤波器在一个判决周期内收敛后,获得的M值满足K次大于Mo时,则在下一个判决周期内采用此自适应滤波器。 When the filter converges in a decision period m, M value obtained satisfies K times larger than Mo, the next decision cycle using this adaptive filter.

在业务信道建立和/或重新开始预测的首个判决周期中,可以直接反馈实际检测值,也可以采用默认的预测滤波器进行预测。 Establish and / restart of the first prediction or decision period, the feedback may be directly detected actual values, default prediction filter may be used to predict the traffic channel.

时延T是TTI的整数倍。 T delay is an integer multiple of TTI. 最小为l个TTI,即当前TTI反馈的CQI,在下 L a minimum TTI, i.e., the current TTI feedback CQI, lower

个rn被使用。 A rn be used. T的大小和反馈的速率成反比,可以通过检测反馈速率判断T Size T and inversely proportional to the feedback rate, feedback can be determined by detecting the rate of T

的大小。 the size of. 通常要求T不超过3个TTI,因为过大的延时使得反馈的CQI不可用。 T usually requires no more than three TTI, such as excessive delay CQI feedback is not available. 如图4所示,实现本发明所述反馈控制方法的反馈控制装置包括: 信道状态检测模块,用于检测当前TTI的信道状态或预测与当前TTI相距 4, the feedback control means according to the present invention is to realize the feedback control method comprising: a channel state detecting means for detecting a channel state of the current TTI or the predicted distance and the current TTI

设定时延之后的信道状态; Setting the channel state after the delay;

反馈执行模块,连接所述信道状态检测模块,用于根据信道状态检测结杲 Performing a feedback module connected to the channel state detecting means for detecting a channel state according to Gao junction

或预测结果确定对应的指示信息,并一艮据该指示信息生成反馈信息。 Prediction result of the determination or the corresponding indication information, and an instruction generator according to the Gen feedback information.

所述反馈控制装置还包括:预测滤波器选择模块,连接所述信道状态检测 Said feedback control means further comprising: a prediction filter selection module, connected to the channel state detector

模块,用于周期性逸择适用的预测滤波器并根据选择结果向所述信道状态检测 Module, Yi prediction filter for periodically select and apply according to the selection result of the detection to the channel state

模块输出相应的控制信息。 Module outputs corresponding control information. 所述反馈控制还包括: The feedback control further comprises:

第一存储模块,连接所述预测滤波器选择模块,用于存储预测滤波器的参数信息; A first memory module, connected to the prediction filter selection module for storing the parameter information of the prediction filter;

第二存储4莫块,连接所述反馈执行4莫块,用于存储信道状态与指示信息的对应关系表。 The second memory block 4 Mo, Mo connecting the feedback execution block 4, for storing a correspondence table indicating the channel state information.

所述>^馈控制装置还包括: The> ^ F control means further comprises:

时延检测模块,连接所述信道状态检测模块,用于周期性检测所述设定时延并将检测结果通知所述信道状态检测模块。 The delay detection module, connected to the channel state detecting means for detecting periodicity of the time delay set and notifies the detection result of the channel state detecting module.

如图5所示,应用图4所述反馈控制装置的一种收发信机,包括用于收发信息的^模块,还包括反馈控制装置,该反馈控制装置包括: As shown, the application in FIG. 4 of the feedback control means 5 A transceiver, comprising means for transmitting and receiving information ^, further comprising feedback control means, the feedback control means comprises:

信道状态检测模块,用于检测当前TTI的信道状态或预测与当前TTI相距设定时延之后的信道状态; Channel status detecting means for detecting a channel state of the current TTI or predicted channel state after the current TTI and delay setting distance;

反馈执行模块,连接在所述信道状态检测模块和收发模块之间,用于根据信道状态检测结果或预测结果确定对应的指示信息,并根据该指示信息生成反馈信息,然后将反馈信息通过所述^模块发送。 Feedback execution module, coupled between said channel status detecting module and a transceiver module, for indicating information corresponding to the channel state is determined according to the prediction result or the detection result, and generates feedback information according to the indication, then the feedback information ^ module sends.

所述的反馈控制装置还包括: Said feedback control means further comprises:

预测滤波器选择模块,连接所述信道状态检测模块,用于周期性选择适用的预测滤波器并根据选择结果向所述信道状态检测模块输出相应的控制信息。 Prediction filter selection module, connected to the channel state detecting means for periodically selecting and outputting the prediction filter applies the appropriate control information to the channel status detecting module according to the selection result. 所述的反々赍控制装置还包括: The anti 々 turn to the control means further comprises:

第一存储4莫块,连接所迷预测滤波器选择模块,用于存储预测滤波器的参数信息; The first block memory 4 Mo, connection fans prediction filter selection module for storing the parameter information of the prediction filter;

第二存储模块,连接所述反馈执行模块,用于存储信道状态与指示信息的对应关系表。 A second memory module, connected to the feedback execution module, for storing a correspondence table indicating the channel state information.

所述的反馈控制装置还包括: Said feedback control means further comprises:

时延检测模块,连接在所述信道状态检测模块和收发模块之间,用于周期性检测所述设定时延并将检测结果通知所述信道状态检测模块。 The delay detection module, coupled between said channel status detecting module and a transceiver module for periodically setting said delay detecting the detection result notifies the channel state detecting module. 经过预测的MCS能够在一定程度上减少时变信道对^^晴的CQI的影响,以仿真数据进行说明,如图6所示,不失一般性,其中取的MCS的等级数为32级。 After the prediction of MCS can be reduced to a certain extent influence of channel variations ^^ Ching CQI to be described simulation data, shown in Figure 6, without loss of generality, the number of MCS levels which are taken 32. 即MCS表中,索引从0到31,发射天线和接收天线都为4。 I.e. MCS table, an index from 0 to 31, the transmitting and receiving antennas are four.

横轴方向FdT,即FfT,其中Fd是多普勒频移,表示终端移动速度,移动速度越快,Fd越大。 FdT horizontal axis, i.e. FFT, where Fd is the Doppler frequency shift indicates that the terminal moving speed, the faster the moving speed, the greater the Fd. T是反馈时延,这里取1个TTI。 T is the feedback delay, here take a TTI. FdT越大,终端移动速度也越大。 FdT greater, the greater the moving speed of the terminal. 纵轴方向是系统容量。 The longitudinal axis of the system capacity.

图6中,菱形虚线和圆圈虚线的两根线表示的是反馈无延迟的理想状态下的容量,作为参考曲线用。 In FIG. 6, the broken line circle and a broken line rhombus two lines represents the capacity of the ideal state of no feedback delay, as a reference curve. 其中菱形虚线是采用MMSE检测、圆圈虛线采用ZF 检测。 Wherein the dotted line is the MMSE detection diamond, a broken line circle using ZF detection. 三角虚线和x号实线是反馈时未采用预测的曲线。 Triangular dotted line and a solid line number x is not predictive of feedback curve. 其中x号实线采用MMSE^r测,三角虚线采用ZF检测。 Wherein solid lines x number measured using MMSE ^ r, the broken line triangle using ZF detection. 五角星实线和*号虛线是采用本发明中的预测方法得到的曲线。 Pentagram solid and broken lines is the use of an asterisk curve prediction method of the present invention is obtained. 前者是MMSB险测,后者是ZF检测。 The former is measured MMSB risk, which is the ZF detector.

可以看到,在MMSE检测的曲线簇中,采用本发明方法预测的曲线(五角星实线)的性能要明显好于未预测的曲线(x号实线)。 It can be seen in a family of curves MMSE detection, the performance of the method of the present invention using the prediction curve (solid line pentagram) significantly better curve (x number solid line) in the non-predicted. 特别是移动终端的速度处于中等速度,即FdT处于0.02到0,2之间,的时候。 Especially when the mobile terminal is in the medium speed velocity, i.e. FdT is between 0.02 to 0,2, the. 对于ZF检测的曲线簇。 For detection of curves ZF. 号虛线和三角虚线)有同样的规律。 No. dashed and dotted line triangle) have the same law.

显然,本领域的技术人员可以对本发明进行各种改动和变型而不脱离本发明的精神和范围。 Obviously, those skilled in the art can make various modifications and variations to the invention without departing from the spirit and scope of the invention. 这样,倘若本发明的这些修改和变型属于本发明权利要求及其等同技术的范围之内,则本发明也意图包含这些改动和变型在内。 Thus, if these modifications and variations of the present invention fall within the claims of the invention and the scope of equivalents thereof, the present invention intends to include these modifications and variations.

Claims (10)

1、一种无线通信系统中的反馈控制方法,其特征在于,包括如下步骤: 接收端根据设定的第一判决周期,比较当前第一判决周期中每一个TTI对应的反馈预测值产生的预测误差和反馈实测值产生的实测误差,当全部预测误差或设定个数的预测误差小于实测误差时,在下一个判决周期中的每一个TTI,利用当前第一判决周期中确定的最优的有限响应滤波器预测与当前发射时间间隔TTI相距一个收发时延之后的信道状态并将所述信道状态预测结果的指示信息反馈给发射端,所述收发时延为发射端与接收端之间收发信息的时间间隔;否则在下一判决周期中的每一个TTI反馈信道状态检测结果的指示信息; 接收端根据设置的一组不同系数的有限响应滤波器,在当前第一判决周期中,同时计算每一个有限响应滤波器的预测误差,并根据预测误差选择所述最优的有限 1, the feedback control method in a wireless communication system, characterized by comprising the steps of: receiving a first end of the decision period set, comparing a first current decision feedback period corresponding to the predicted value for each generated predicted TTI Found error feedback error and measured values ​​generated when all of the prediction error of the prediction error and the number is set smaller than the measured error, the next decision period in each of the TTI, the current limited using the optimal decision period determined in the first predicting channel state response of the filter and the channel state predictor delay after TTI away from one transceiver to the current transmission time interval indication information feedback to the transmitting end, the transceiver delay information exchanged between the transmitting end and the receiving end time interval; otherwise, each TTI feedback information indicating the channel state detection result of the judgment in the next cycle; receiving end according to a different set of finite response filter coefficients provided, the first current decision period while each calculated finite response filter prediction error, and a prediction error in accordance with the selected optimal finite 应滤波器。 It should filter.
2、 如权利要求1所述的方法,其特征在于,所述最优有限响应滤波器的选择方法是:对于有限响应滤波器在同一个TTI的一组预测误差中,记录最小误差对应的有限响应滤波器,最后将当前判决周期中最小误差出现次数最多的有限响应滤波器作为最优有限响应滤波器,如果最小误差出现次数对应两个或以上有限响应滤波器,则再随机选择或根据选择其中预测误差平均值最小的一个作为最优有限响应滤波器。 2. The method as claimed in claim 1, wherein said method of selecting the optimal finite response filter is: for the same finite response filter in a set of prediction error for a TTI, the minimum error corresponding to the limited recording response filter, and finally the current minimum error decision period largest number of occurrences as the optimal finite response filter finite response filter, an error occurs if the minimum number of times corresponding to two or more finite response filters, the randomly selected or selected in accordance with wherein a smallest prediction error as an average of the optimal finite response filter.
3、 如权利要求1或2所述的方法,其特征在于,所述方法还包括:在接收端与发射端建立信道后和重新开始预测的首个第一判决周期内的每一个TTI,利用预先指定的有限响应滤波器预测与当前发射时间间隔TTI相距一个收发时延之后的信道状态并将所述信道状态预测结果的指示信息反馈给发射端;或者直接反馈信道状态检测结果的指示信息。 3. A method as claimed in claim 1 or 2, characterized in that the method further comprises: establishing each TTI in a channel after the restart and the first prediction of the first decision period at the receiving end and the transmitting end, using a pre-specified distance TTI finite response filter channel state prediction and the prediction result of the channel state after the transceiver delay and a current Transmission time interval indication information feedback to the transmitting end; or a direct feedback channel state information indicating the detection result.
4、 如权利要求l所述的方法,其特征在于,所述方法还包括: 接收端根据所述第一判决周期,周期性检测并更新所述收发时延;或者接收端根据设定的第二判决周期,周期性检测并更新所述收发时延。 4. The method of claim l, wherein said method further comprises: a first receiving terminal in accordance with the decision period, the transceiver periodically detect and update delay; or a receiver according to a set of two decision period, periodic testing and updating the transceiver delay.
5、 如权利要求l、 2或4所述的方法,其特征在于,所述的指示信息是指 5, as claimed in claim l, 2 or 4, characterized in that said information indicating means
6、 如权利要求5所述的方法,其特征在于,所述的调制编码方式MCS索引的获得方法包括:接收端利用有限响应滤波器预测距离当前发射时间间隔TTI 一个收发时延之后的信道的冲击响应值,然后根据该冲击响应值计算天线的信噪比,再根据天线的信噪比确定对应的MCS索引。 6. The method as claimed in claim 5, characterized in that, for obtaining the modulation and coding scheme MCS index comprising: a receiving end finite response filter after predicting channel transmission time interval TTI from the current delay of a transceiver impulse response value, then the SNR calculated based on the antenna impulse response value, and then determine the signal to noise ratio corresponding to the MCS index of the antenna.
7、 如权利要求6所述的方法,其特征在于,当用于多输入多输出MIMO 系统时,根据冲击响应值分别计算每一个天线的信噪比并确定对应的MCS索引,然后将每一个天线对应的MCS索引及该天线的标识信息全部反馈给发射端o 7. The method as claimed in claim 6, wherein, when used in multiple input multiple output MIMO system, the SNR is calculated for each antenna according to the determined impulse response values ​​and corresponding MCS index, and each of MCS index corresponding to the antenna and the antenna identification information of all the feedback to the transmitting end o
8、 如权利要求1所述的方法,其特征在于,所述的有限响应滤波器为3 阶有限响应滤波器。 8. A method as claimed in claim 1, wherein said third-order finite response filter finite response filter.
9、 一种反馈控制装置,其特征在于,包括:信道状态检测模块,用于检测当前TTI的信道状态或预测与当前TTI相距设定时延之后的信道状态,具体包括:根据设定的第一判决周期,比较当前第一判决周期中每一个TTI对应的反4贵预测值产生的预测误差和反馈实测值产生的实测误差,当全部预测误差或设定个数的预测误差小于实测误差时,在下一个判决周期中的每一个TTI,利用当前第一判决周期中确定的最优的有限响应滤波器预测与当前发射时间间隔TTI相距一个收发时延之后的信道状态将所述信道状态预测结果的指示信息反馈给发射端,所述收发时延为发射端与接收端之间收发信息的时间间隔;否则在下一判决周期中通过所述反馈执行模块的每一个TTI反馈信道状态检测结果的指示信息;反馈执行模块,连接所述信道状态检测模块,用于根据信道状态检测 9. A feedback control apparatus comprising: a channel state detecting means for detecting a channel state of the current TTI or the predicted distance and the current TTI channel state after the set time delay comprises: a first set in accordance with a decision period, first comparing the current measured error decision period 4 anti expensive TTI corresponding to a predicted value for each prediction error generated by feedback Found generated when all of the prediction error of the prediction error and the number is set smaller than the measured error , the next state of the channel after a decision period in each of a TTI, the finite response filter using the optimal decision of the current period determined in the first prediction of the current transmission time interval TTI apart one transceiver to the delay state of the channel prediction result indication feedback to the transmitting end, the time delay of the transceiver transmitting and receiving information between the transmitter and receiver spacing; otherwise, by instructing the execution of each TTI feedback channel state feedback module detection result of the judgment in the next cycle information; performing feedback module connected to the channel state detecting module for detecting a channel state 结果或预测结杲确定对应的指示信息,并根据该指示信息生成反馈信息;预测滤波器选择模块,连接所述信道状态检测模块,用于周期性选择适用的预测滤波器并根据选择结杲向所述信道状态检测模块输出相应的控制信息,具体包括:根据设置的一组不同系数的有限响应滤波器,在当前第一判决周期中,同时计算每一个有限响应滤波器的预测误差,并根据预测误差选择所述最优的有限响应滤波器。 Gao determination results or predicted junction instruction information, and generating feedback information based on the information indicating; prediction filter selection module, connected to the channel state detecting means for periodically selecting applicable prediction filter according to a selected junction Gao the channel state detection module outputs the corresponding control information comprises: a set of finite response filter coefficients provided different, in the present first decision period, while the prediction error is calculated for each finite response filter, and in accordance with selecting an optimum prediction error of the finite response filter.
10、 一种收发信机,包括用于收发信息的收发模块,其特征在于,还包括: 反馈控制装置,所述反馈控制装置具体包括:信道状态检测模块,用于检测当前TTI的信道状态或预测与当前TTI相距设定时延之后的信道状态,具体包括:根据设定的第一判决周期,比较当前第一判决周期中每一个TTI对应的反^t预测值产生的预测误差和反馈实测值产生的实测误差,当全部预测误差或设定个数的预测误差小于实测误差时,在下一个判决周期中的每一个TTI,利用当前第一判决周期中确定的最优的有限响应滤波器预测与当前发射时间间隔TTI相距一个收发时延之后的信道状态将所述信道状态预测结果的指示信息反馈给发射端,所述收发时延为发射端与接收端之间收发信息的时间间隔;否则在下一判决周期中通过所述反馈执行模块的每一个TTI反馈信道状态检测结果的指示 10. A transceiver module includes a transceiver for transmitting and receiving information, characterized by, further comprising: feedback control means, said feedback control means comprises: a channel status detecting means for detecting a channel state of the current TTI or prediction and away from the current TTI channel state after the set time delay comprises: a first prediction error based on the decision period set, comparing a first current decision period each TTI corresponding inverse prediction values ​​t ^ and the generated feedback Found Found error value generated, all of the prediction error when the prediction error is or is set smaller than the number of the measured error, the next decision period in each of the TTI, the finite response filter using the optimal prediction of the current period determined in the first judgment the channel state after the transceiver delay distance TTI transmission time interval and the current information indicating the channel state feedback prediction result to the transmitting end, the time delay of the transceiver transmitting and receiving information between the transmitting and receiving ends spaced; or in the next cycle by the decision feedback indicating the execution of each TTI a detection result of the channel state feedback module 信息;反馈执行模块,连接所述信道状态检测模块和收发模块之间,用于根据信道状态^r测结果或预测结果确定对应的指示信息,并一艮据该指示信息生成反4贵信息,然后将所述反馈信息通过所述收发模块发送;预测滤波器选择模块,连接所述信道状态检测模块,用于周期性选择适用的预测滤波器并根据选择结果向所述信道状态检测模块输出相应的控制信息, 具体包括:.根据设置的一组不同系数的有限响应滤波器,在当前第一判决周期中,同时计算每一个有限响应滤波器的预测误差,并根据预测误差选择所述最优的有限响应滤波器。 Information; performing feedback module, the channel state between the detection module and a transceiver module is connected, according to a channel state measurement results or ^ r prediction indication information corresponding to the result of the determination, and an instruction generator according to the anti-Gen 4 expensive information, the feedback information is then sent through the transceiver module; prediction filter selection module, connected to the channel state detecting means for periodically selecting applicable prediction filter and the corresponding channel according to the state detection module outputs the selection result the control information comprises: a set of finite response filter coefficients provided different, in the present first decision period, while the prediction error is calculated for each finite response filter and selected according to the optimal prediction error finite response filter.
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