CN1325573A - Method and devie for adapting a transmission data rate or a transmitter power to the transmission quality of a trausmission channel - Google Patents

Method and devie for adapting a transmission data rate or a transmitter power to the transmission quality of a trausmission channel Download PDF

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CN1325573A
CN1325573A CN 99812792 CN99812792A CN1325573A CN 1325573 A CN1325573 A CN 1325573A CN 99812792 CN99812792 CN 99812792 CN 99812792 A CN99812792 A CN 99812792A CN 1325573 A CN1325573 A CN 1325573A
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transmission
channel
rate
data transfer
signal
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CN 99812792
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Chinese (zh)
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J·埃钦格
R·哈尔夫曼
W·利格尔
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西门子公司
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    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W52/00Power management, e.g. TPC [Transmission Power Control], power saving or power classes
    • H04W52/04TPC
    • H04W52/18TPC being performed according to specific parameters
    • H04W52/26TPC being performed according to specific parameters using transmission rate or quality of service QoS [Quality of Service]
    • H04W52/265TPC being performed according to specific parameters using transmission rate or quality of service QoS [Quality of Service] taking into account the quality of service QoS
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00Arrangements for detecting or preventing errors in the information received
    • H04L1/0001Systems modifying transmission characteristics according to link quality, e.g. power backoff
    • H04L1/0002Systems modifying transmission characteristics according to link quality, e.g. power backoff by adapting the transmission rate
    • H04L1/0003Systems modifying transmission characteristics according to link quality, e.g. power backoff by adapting the transmission rate by switching between different modulation schemes
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00Arrangements for detecting or preventing errors in the information received
    • H04L1/0001Systems modifying transmission characteristics according to link quality, e.g. power backoff
    • H04L1/0009Systems modifying transmission characteristics according to link quality, e.g. power backoff by adapting the channel coding
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00Arrangements for detecting or preventing errors in the information received
    • H04L1/0001Systems modifying transmission characteristics according to link quality, e.g. power backoff
    • H04L1/0015Systems modifying transmission characteristics according to link quality, e.g. power backoff characterised by the adaptation strategy
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00Arrangements for detecting or preventing errors in the information received
    • H04L1/0001Systems modifying transmission characteristics according to link quality, e.g. power backoff
    • H04L1/0023Systems modifying transmission characteristics according to link quality, e.g. power backoff characterised by the signalling
    • H04L1/0025Transmission of mode-switching indication
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W52/00Power management, e.g. TPC [Transmission Power Control], power saving or power classes
    • H04W52/04TPC
    • H04W52/18TPC being performed according to specific parameters
    • H04W52/26TPC being performed according to specific parameters using transmission rate or quality of service QoS [Quality of Service]
    • H04W52/267TPC being performed according to specific parameters using transmission rate or quality of service QoS [Quality of Service] taking into account the information rate

Abstract

为了使数据传输速率与已有的传输信道相匹配,根据本发明,如此来选择发送功率和/或编码方法,以便根据传输信道的传输质量来采用最大可能的数据传输速率或最小的发送功率。 To make the data transmission rate existing transmission channel matches, according to the present invention, so selected transmit power and / or encoding methods, in order to use the maximum possible data transfer rate or the minimum transmission power according to a transmission quality of the transmission channel.

Description

使数据传输速率或者发送功率同传输信道的传输质量相匹配的方法和装置 Data transmission rate or transmission power with a method and apparatus of transmission quality of the transmission channel matches

本发明涉及一种使数据传输速率或者发送功率同传输信道的传输质量相匹配的方法。 The present invention relates to a method of data transmission rate or the same transmission power of the transmission quality of the channel matches the transmission.

对数字传输系统的需求在近十年内飞速地增长。 Demand for digital transmission systems to grow rapidly in the last decade. 数字传输系统通常可以划分成图1所示的功能单元。 The digital transmission system may generally be divided into functional units shown in FIG. 由信息源1产生信息,该信息由发射机经传输信道4向接收机传输。 Information generated by the information source 1, the information transmitted by the transmitter 4 to the receiver via a transmission channel. 需传输的信息的特性取决于信息源。 Characteristics of the information to be transmitted depends on the information source. 需传输的信息譬如可以是音频信号或者视频信号。 Such information may be required to transfer audio signals or video signals. 其中模拟传输系统传输的是模拟信号,该模拟信号是应用常规的模拟调制方法直接通过传输信道从模拟信息源产生的。 Wherein the analog transmission system that is an analog signal, the analog signal is a modulation method using a conventional analog simulation information generated directly from the source through the transmission channel. 这样的调制方法譬如是幅度调制、频率调制或者相位调制。 Such modulation methods such as amplitude modulation, frequency modulation or phase modulation. 在数字传输系统中,把需传输的信息转换成一系列的二进制数码。 In digital transmission systems, the need to convert information into a series of transmission binary numbers. 为了尽量好地利用信道的容量,应当用必要少的二进制数码来表示需传输的信息。 In order to try to better use of the capacity of the channel, it shall be necessary few binary digital information required to represent the transmission. 为此目的,采用了一种源编码器,其任务是把需传输的信息转换成一系列的信号值并进行编码,使之可以由信道传输。 For this purpose, use of a source encoder, which task is to convert the information into a series of required transmission values ​​and encoded signal, so that it can be transmitted by the channel. 在此,源编码器力图把需传输的信息尽可能高效地转换成二进制数码。 Here, for an information source coding try to turn transmitted as efficiently as possible to convert binary numbers.

源编码器产生的二进制数码序列由信道传向接收机。 Binary number sequence generated by the source encoder channel transmitted to the receiver. 这样的实际信道譬如可以由线路连接、同轴电缆、光导体(LWL)、无线电连接、卫星信道或这些传输介质的组合构成。 Such actual channel may be connected by lines such as coaxial cable, optical waveguide (the LWL), a radio link, a satellite channel or a combination of these transmission media configuration. 这样的信道不可能直接传输发射机的二进制数码序列。 Such a channel transmitter can not directly transmitted binary digital sequence. 为此必须把数字信息序列转换成与信道的特性相对应的信号值。 It must be converted to this digital information sequence signal to the channel characteristic values ​​corresponding to. 这种装置称为数字调制器。 This device is called a digital modulator. 这种调制器是信道编码器3的一部分,所述编码器还包括分立的信道编码器,以便使需传输的信息得到与信道相匹配的防错保护。 This modulator is a part of a channel encoder 3, the encoder further comprises a discrete encoder channel, so as to obtain the required information transmission channel matches the protection against errors.

不指望传输信道4无错地工作,而是假定在传输时干扰源5以一定的几率改变传输信号。 Do not expect a transmission channel 4. work without error, but the interference source is assumed to have a chance of changing the 5 transmitting signals during transmission.

这样的干扰譬如可以是相邻信道中传输的信号的串扰。 Such interference may be such as the crosstalk in the adjacent channels of the transmission signals. 该干扰还可能由发射机和接收机中使用的电子电路,譬如放大器和滤波器所产生的热噪音引起。 The interference also may be caused by such transmitter and receiver circuits used in electronic thermal noise generated by the amplifiers and filters. 在线路连接的情况下,干扰也可能由切换造成,而在无线电或卫星连接情况下这可能由气候影响,譬如雷雨、冰雹或下雪造成。 In the case where the connected line, the interference may be caused by switching, and in radio or satellite connections which may, for example, thunderstorms, hail or snow caused by climate. 这样的影响会改变传输信号,并且造成接收的数字信号序列中出错。 Such changes may affect the transmitted signal, and causes the received digital signal sequence error.

尽管如此,为了保证相对可靠的传输,信道编码器提高了需传输的(二进制)序列的冗余。 Nevertheless, in order to ensure relatively reliable transmission, the channel coder increases the redundancy (binary) sequences required for transmission. 借助于由发射机添加的冗余,接收机在解码时支持加载有信息的信号序列。 The transmitter means of added redundancy, the receiver support is loaded with a signal sequence decoding information. 为此,譬如由信道编码器把一定数目的信号组合成块,然后添加一定数目的控制信号(在最简单的情况下是奇偶校验位)。 For this purpose, for example, a certain number of the combined signal into blocks by a channel encoder, and then adding a number of control signals (in the simplest case is a parity bit). 以此方式,总是同时编码k个信息比特,其中每个k比特序列被分配给一个单值的n比特序列、即所谓的代码字。 In this manner, while always k coded information bits, wherein each bit sequence k n bit sequence is assigned to a single value, i.e., a so-called code words. 这样添加的冗余可以用n/k比说明。 Such redundancy may be added by instructions than n / k. 与此对应,也应当相应地提高信道带宽,以便传输用添加冗余扩展了的信息序列。 Corresponding to this, should correspondingly increase channel bandwidth for the transmission of redundant information extended to add sequences.

另外还可以通过提高发送功率达到提高抗信道干扰的可靠性。 It also can achieve improved anti-channel interference by improving the reliability of the transmission power. 但是,因为提高发送功率的成本相对较高,所以通常是在可利用的带宽中通过提高所要求的信道带宽来得到该可靠性。 However, since the cost of increasing the transmission power is relatively high, so the reliability is usually obtained by improving channel bandwidth required for the bandwidth available.

在总是以R比特/秒的数据传输速率传输一个比特时,调制器把一个信号特性或者说一个信号值(下文只称信号值)s1(t)分配给二进制数码0,把一个信号值s2(t)分配给二进制数码1。 In bits always at a data transmission rate transmitting R bits / s, the modulator a signal characteristic or a signal value (hereinafter simply referred to as a signal value) s1 (t) assigned to the binary number 0, the value of a signal s2 (t) assigned to the binary number 1. 这种每个单独的比特通过信道编码器的传输被称为二进制调制。 Each such individual bits through the channel encoder are transmitted called binary modulation. 另外,调制器可以用M=2k个不同的的信号值si(t)(i=1、2、…M)来同时传输k个信息比特,其中2k个可能的k比特序列中的每一个均被分配了一个信号值。 In addition, the modulator may be M = 2k distinct signal values ​​si (t) (i = 1,2, ... M) k information bits to transmit simultaneously, where k 2k possible bit sequences in each of which signal is assigned a value.

在数字传输系统的接收机方面,数字解调器对在信道中(有时是变化地)传输的信号值进行处理,并且为每个信号值分配一个表示传输数据符号(譬如二进制数)估测的单个数字。 In terms of digital transmission system receiver, a digital demodulator to the channel (sometimes variably) the value of the signal transmitted are processed, and represents a transmitting data symbols (for example, binary number) estimated value assigned to each of the signal a single number.

在接收机中接收了信号后,解调器必须判定发送的是M个可能信号值中的哪些。 After the received signal in the receiver, the demodulator must be sent is determined that the M possible signal values ​​which. 这种判定用判定器(限制器)来实现,其中判定必须采取最低的出错几率。 This determination decider (limiter) is implemented, which must be taken to determine the lowest chance of error. 这种判定器把一个(大多为处理过的)接收值分配给M个可能符号值中的一个。 This put a determiner (mostly treated) receiving a value assigned to the M possible symbol values.

譬如,使用二进制调制时,解调器在处理每个接收的信号时都要判定传输比特是0还是1。 For example, when using a binary modulation, demodulation processing is to be determined upon the transmission of each received signal bit is 0 or 1. 在该情况下,解调器进行的是二进制判定。 In this case, the demodulator is a binary decision. 另外解调器还可以进行三进制判定,其中,解调器依据接收信号的质量来判定是“0”、“1”还是“无判定”。 Further demodulator may also ternary determination, wherein, according to the demodulator to determine the received signal quality is "0", "1" or "non-determination."

解调器的判定过程可以看成是量化,其中,二进制和三进制判定是用Q电平量化的解调的特定情况,其中Q≥2。 The decision process can be seen as the demodulator quantization particular case wherein determination binary and ternary quantization level Q is demodulated, wherein Q≥2. 通常地,数字通信系统采用高值的解调,其中m=0、1…M-1表示M个可能的传输符号。 Generally, communication systems use digital demodulation high values, where m = 0,1 ... M-1 represents the M possible transmitted symbols.

当传输的信息没有冗余时,解调器必须在每个预定的时间间隔内判定传输的是M个信号值中的哪些。 When the redundancy information is not transmitted, the demodulator must be determined in each predetermined transmission time interval is M signal values ​​which. 反之,如果传输的信息有冗余,解调器则根据信道编码器采用的代码和接收数据的冗余来重构原来的信息序列。 Conversely, if the transmission of redundant information, the demodulator to reconstruct the original information sequence based on the redundancy code and receiving data using a channel encoder. 按照应用所确定的要求,由信道编码器产生信号块,使得信道解码器要么可以只确定是否出现了某些干扰(出错识别编码),要么甚至自动地纠正(纠错编码)由干扰造成的出错(直到每信号块的某一最大数目)。 According to the application requirements identified, generating signal blocks by a channel encoder, such that the channel decoder or can only determine whether there is some interference (error detection code), or even automatically corrected (error correction coding) error caused by the interference (up to a certain maximum number of signals per block).

从发射机向接收机传输信息的可靠性尺度用出错率表示。 It represents the error rate from a transmitter to a receiver to transmit information reliability scale. 出错率给出了在解码器的输出端以多大平均几率出现一个比特错误。 Error rate gives a bit error occurs at the output of the decoder at what average chance. 比特出错率给出了每单位时间在接收机处出现的出错比特除以总的接收比特数。 Bit error rate gives the number of received bit errors occurring per unit time divided by the total bits at the receiver. 比特出错率(当判定的是符号出错频度时也称符号出错率)是数字传输系统最重要的质量标准。 Bit error rate (also referred to when it is determined that the sign of the symbol error rate error frequency) is the most important quality standards for digital transmission systems. 通常地,出错几率取决于代码特性、经信道传输信息时所采用的信号值的种类、发送功率、信道的特性(即噪音的强度、干扰的类型等)以及调制和解码方法等。 Generally, depending on the error probability of the code characteristics, the type of signal values ​​when transmitting information over the channel used, transmission power, channel characteristics (i.e., the intensity of noise, interference type, etc.) and a modulation and a decoding method. 数字传输系统的比特出错率的意义与模拟传输系统的信噪比(SNR)相当。 Significance SNR analog transmission system and a digital transmission system bit error rate (SNR) is quite.

在解调器的输出处出现的符号或在解码器输出处出现的比特的出错率取决于传输介质的特性(即传输信道的特性)、所选的调制及编码方案和发送信号的平均功率。 The symbols appear at the output of the bit error rate of the demodulator or the decoder appears in the output depends on the characteristics of the transmission medium (i.e., the characteristic of the transmission channel), the average power and modulation and coding scheme for the selected transmission signal. 为了使数据传输速率同传输信道相匹配,通常是通过传输一个接收机已知的比特或符号序列来确定传输信道的传输特性。 In order to match the data rate to the same transmission channel, the transmission characteristics are generally determined transmission channel by transmitting a known bit or symbol receiver sequence. 通过理论与实际比较可以在接收机中测出信道的出错率。 Comparative channel error rate can be measured by the receiver in theory and practice. 以此可以确定当前数据传输的品质。 In order to determine the quality of the current data transmission. 但是,这种方法的缺点是只能测出发送功率、编码和调制方法的一个可能的组合测度。 However, the disadvantage of this method is to measure only one possible combination of measures transmission power, coding and modulation methods. 为了不必对每个可能的数据传输速率及发送功率进行各自的测量,通常采用迭代方法来查出最佳的数据传输速率及发送功率。 In order not to perform the respective measurement of each of the possible data transmission rates and transmission power, usually an iterative method to find the best data transmission rate and transmission power.

本发明的任务是创造一种使数据传输速率或/和发送功率与传输信道相匹配的改进方法或改进装置。 Object of the invention is to create an improved method or data transmission rate / transmission power, and transmission channel matched or improved means.

此任务在装置方面通过权利要求1和9的技术方案解决,在方法方面通过权利要求10和17的技术方案解决。 This task in terms of apparatus by claim 1 and solution 9 aspect, in a method aspect by technical solution according to claim 10 and 17 solutions.

本发明的优选扩展方案在从属权利要求中给出。 Preferred developments of the invention are given in the dependent claims.

根据本发明,按照测定的传输信道的信噪比来调节数据传输速率或者发送功率。 According to the present invention, in accordance with the measured SNR of the transmission channel to adjust the data transmission rate or transmission power. 通过测定传输信道的传输质量、特别是信噪比,可以知道最大可能的数据通过量,并相应地确定数据传输速率或者按照采用的数据传输速率把发送功率最小化。 By measuring the transmission quality of the transmission channel, especially the signal to noise ratio can be known by the maximum possible amount of data, and accordingly determines the data transmission rate or transmission rate according to the data used to minimize transmission power.

以此方式,可以不依赖于所选的编码方法而“在线”地(即在数据传输时)测量从调制器至传输信道再至解调器而得到的传输序列,并且按照要求的数据传输速率确定发送功率和/或编码方法,以便保证预定的字节或符号出错率。 In this manner, without depending on the selected encoding method "on-line" manner (i.e. data transmission) measured from the modulator to a transmission channel for transmitting the sequence obtained by the demodulator to further, and in accordance with the required data transfer rate determining the transmission power and / or encoding methods, in order to ensure a predetermined byte or symbol error rate. 为了把编码方法确定得能够找出最大可能的数据通过量的最高允许出错率,并且为了给确定的传输速率把最小的发送功率确定得不超过最大的允许出错率,前提条件是对信噪比进行测量。 In order to determine the coding method can be obtained by finding the maximum possible amount of data of the maximum allowable error rate, and in order to determine the transmission rate of the minimum transmission power is determined not to exceed the maximum allowable error rate, signal to noise ratio with the proviso that measurement. 特别有利的是,只要进行一次测量便可以为当前的传输信道和采用的调制方法找出一种能够得到最大可能传输速率的编码方法,相反,常规方法必须要测量发送功率、编码和调制方法的每种可能的组合。 It is particularly advantageous, as long as one measurement that can be the current transmission channels and the modulation method employed to find a method of encoding the maximum possible transmission rate can be obtained, on the contrary, the conventional method must be measured transmission power, coding and modulation methods every possible combination. 因此,只要保持所采用的调制方案不变就可以不中断地切换数据传输速率(“软切换”)。 Thus, as long as the modulation scheme employed to maintain constant can be switched without interrupting the data transmission rate ( "soft handoff").

另外,可以使发射机的功率与所要求的传输质量相匹配,其方法为,根据测量的信噪比和要求的信噪比之间的差来升高或者降低发送功率。 Further, the transmission quality of the power required by the transmitter match, which method is to increase or decrease the transmission power according to a difference between the measured SNR and SNR requirements. 以此方式,可以在测量信噪比的基础上优化发送功率,即在保证质量要求和保持所要求的传输速率的同时,用尽可能低的发送功率匹配所选出的传输方法和现有的传输信道,也就是使发送功率最小化。 In this manner, the transmission power can be optimized on the basis of the measured signal to noise ratio, i.e., while ensuring and maintaining the quality requirements of the desired transmission rate, the transmission method for transmission power as low as possible and to match the selected conventional transport channel, i.e. the transmission power is minimized. 从而把干扰辐射减少至最小,并同时提高同频带工作的相邻系统的传输容量。 Thereby interfering radiation reduced to a minimum, while increasing the transmission capacity of the system frequency band adjacent to the same.

下面参照附图来详细说明本发明的优选实施例,图中:图1是信息传输系统的通常构造,图2是根据本发明的、通过接收方的信噪比测量把数据速率和调制方法同传输介质相匹配的传输系统的构造,图3是根据本发明的、通过接收方的信噪比测量把数据传输速率、调制方法和发送功率同传输介质相匹配的传输系统的构造,以及图4是用于按测定和采用的传输质量来调节发送功率的“功率控制”图解。 Described in detail preferred embodiments of the present invention are described below with reference to the accompanying drawings, in which: Figure 1 is generally constructed of an information transmission system, according to the present invention, FIG. 2, the signal to noise ratio measured by the reception side data rate and modulation method in accordance with the configuration of the transmission system matches the transmission medium, according to FIG. 3, the configuration of the transmission system by measuring the signal to noise ratio of the receiver the data transmission rate, modulation method and transmission power with the transmission medium matches, 4 of the present invention and FIG. It is a "power control" assay and illustrated by using the transmission quality to adjust transmission power.

在数字信息传输中,经传输介质在信息源(发射机)和接收机之间传输信息。 In the digital information transmission, the information transmitted via the transmission medium between the information source (transmitter) and receiver. 在发射机和接收机之间的这种装置通常称为信道。 Such devices between transmitter and receiver is commonly referred to as a channel.

为了进行传输,把需传输的数据转换成同信息信道的传输特性相匹配的代码字,以保证需传输的数据等不会发生传输出错。 For transmission, the transmission of data to be converted into a code word of the same transmission characteristic information matches the channel, required to ensure that data transmission or the like transmits an error does not occur.

在传输时,在发射机中借助于一种可逆的单值函数分配而给一个比特序列分配一个符号,此符号通常称为信号空间符号或者信道符号。 In the transmission, by means of a reversible single-valued function allocated in the transmitter and a bit sequence assigned to a symbol, this symbol is commonly referred to as a symbol or a signal space channel symbol. 然后把此符号映射到此符号所属的信号特性(下文称信号值)上。 This symbol is then mapped to the signal characteristics symbol belongs (hereinafter referred to signal values) on. 发射机中一或多个符号至一个比特序列的函数分配称为编码或者映射,把一或多个这样的符号映射到信号值上称为调制。 A plurality of transmitter symbols or function assigned to a sequence of bits called an encoder or mapped, to one or more of these symbols are mapped to the modulation signal value is referred to.

该映射序列的逆变换在接收机中进行。 The inverse transformation performs mapping sequence in the receiver. 由于失真和信道的迭加干扰,通常不可能无错地进行解调,即把接收信号分配成符号,但是解码、也即把检测到的符号转换成相应的比特序列还是不成问题的。 Since the distortion and interference channel is superimposed, it is generally not possible without error demodulates the received signal which is allocated to symbols, decoding it, i.e. to convert the detected symbol into the corresponding bit sequence is not a problem.

图2中示出了一种传输系统的构造,它按照传输信道的质量来调节所希望的数据传输速率。 FIG. 2 shows a configuration of a transmission system, according to which the quality of the transmission channel to adjust a desired data transfer rate. 数字信息、特别是比特序列13由发射机10经传输信道11向接收机12传输,该接收机输出接收的数字信息,特别是比特序列25。 Digital information, in particular 13 bit sequence of digital information transmitted by the transmitter 10 via a transmission channel 11 to the receiver 12, receiving the output of the receiver, in particular 25 bit sequence. 发射机10的信道编码器14包含有数字信道编码器50、比特/符号转换器15和调制器17。 The transmitter channel encoder 10 of channel 14 includes a digital encoder 50, bit / symbol converter 15 and the modulator 17. 数字信道编码器50向输入的比特流13添加冗余。 Digital channel encoder 50 adds redundancy to the bit stream input 13. 这样构成的编码比特流51在比特/符号转换器15中转换成符号序列16,该符号序列又通过调制器17可逆且单值地映射到信号特性或信号值18上。 Such coded bit stream 51 into a sequence of symbols configured in 16 bits / symbol converter 15, the symbol sequence in turn by a reversible single-valued modulator 17 and mapped onto the signal characteristic or a signal value 18. 通过传输信道11把信号值18传输到接收机12。 Transmission of the transmission signal 11 by the value of the channel 18 to the receiver 12.

把接收到的信号值19转换成数字信息25的接收机12的信道解码器20的主要部件有:解调器55、符号/比特转换器24和数字信道解码器52。 The value of the received signal 19 is converted into digital information receiver 25 of the main member 12 of the channel decoder 20 has: a demodulator 55, a symbol / bit converter 24 and a digital channel decoder 52. 在解调器中,首先由模拟和可供选用的数字信号处理单元,譬如包含接收放大器、A/D转换器和均衡器的单元整理所接收的信号值。 In the demodulator, the first available analog and digital signal processing unit selected, for example, comprising a reception amplifier, the signal value of A / D converter unit and a finishing equalizer received. 接着把如此整理的信号值21馈入判定器或限制器22,它为每个接收的信号值21分配一个符号23。 Then the signal values ​​thus determined finishing feed 21 or limiter 22, which receives signal values ​​for each symbol 21 is assigned a 23.

信道解码器20的符号/比特转换器24按照所选的映射方法为每个检测出的符号或者每个检测出的符号序列23分配编码的数字信息或编码的比特序列53,借助数字信道解码器52按照所选的编码方法从该序列中导出数字信息或比特流25。 Digital information symbols or coded bit sequence of the channel decoder 20/24-bit converter in accordance with a selected symbol mapping method for each detected or detected symbol sequence 23 for each allocation encoding 53, by means of a digital channel decoder 52 according to the selected method of deriving a digital encoding of information or bit stream 25 from the sequence.

判定器(限制器)22是每个解调器的基本组成部分。 Determiner (limiter) 22 is an essential part of each demodulator. 这种判定器为通常被整理过的接收值分配一个或多个最可能已被发送出的符号。 Such determination allocates one or more symbols have been transmitted most likely to receive value is usually finishing off. 由于传输信道的干扰或失真通常会使判定器的大量输入值与发射机的“有效”信号值不一致,即不对应于分配给需发送符号的信号值,所以可从判定器的输入信号21和输出信号23测出判定器输入处的信噪比28,且与所采用的编码和映射算法无关。 Since the transmission channel typically causes interference or distortion of the transmitter is determined that a large number of input values ​​of an "active" signal values ​​are inconsistent, i.e., does not correspond to the value assigned to the transmission symbol of the desired signal, the input signal from the determiner 21, and 23 determines the output signal to noise ratio measured at the input 28, and is independent of the coding and the mapping algorithm employed. 为此,本发明的接收机具有一个用于测量经传输信道11传输的信息的信噪比(信号噪音比SNR)的装置27。 Means SNR (signal to noise ratio SNR) of that end, the present invention has a receiver for an information transmission via the transmission channel 11 of the 27 measurements.

在本发明用于测量信噪比的装置的可能实施方案中,在接收机方的解调器中为每个检测出的符号重新分配一个信号值60,该值是指与所述检测出的符号相对应的信号特性或信号值被无误地传输时、在解调器的判定器输入端应当接收的信号值。 In a possible embodiment of the invention the means for measuring the signal to noise ratio at the receiver side a demodulator for each detected symbol value to reallocate a signal 60, which refers to the detected when a signal corresponding to the symbol or signal characteristic values ​​are transmitted without errors, determining the signal values ​​of the input of the demodulator should receive. 利用该方式生成不含具有信道失真和干扰的信号值的、与检测出的符号值相对应的假想输入信号。 Generating free having the symbol value detected in the input signal corresponding to the virtual value signal channel distortion and interference with this embodiment. 因此,只要判定器没有检测出差错符号,这种参考信号就对应于发射机方的原信号。 Thus, as long as no error is detected symbol determiner, such reference signal is a signal corresponding to the original transmitter side. 通过从被整理过的接收机信号21中减去所述的参考信号便可得到干扰信号。 By the reference signal from the receiver signal is collated 21 subtracts the interference signal can be obtained.

这样构成的参考信号的平均功率与接收的未受干扰的信号部分的功率相对应。 Power signal portions undisturbed average power of the received reference signal corresponding to the thus configured. 判定器输入处的信号平均功率对应于接收的干扰部分和信号部分的总功率。 The average power of the input signal at the arbiter portion corresponds to the total power of the interference and the received signal portion. 由此借助于先前计算的无干扰的信号部分来计算干扰功率。 Whereby by means of interference-free signal previously calculated interference power calculating portion. 从无干扰的信号部分的平均功率与干扰部分的平均功率的比值得到信噪比(SNR),并将其作为传输信道的传输质量的量度。 Average power ratio of the average power and the interference portion of the signal obtained from clear portion of the signal to noise ratio (SNR), and the transmission quality of the transmission channel as a measure thereof.

以这样的方法,可以避免象其它常规方法所需要的那样必须把一定的发送序列通知给接收机。 In this method, it must be avoided that a certain sequence of transmission to the receiver notifies other conventional methods as needed. 同时还可以在分析传输符号时并行地检测出错率,也就是“在线”地检测出错率。 Also can be detected in parallel transmission symbol error rate in the analysis, i.e. "line" detected error rate. 因此对于连续地测量传输质量,不再需要周期性地在需传输的数据流中加杂测试序列。 Therefore, for continuously measuring the transmission quality, no longer need to periodically transfer a data stream for an added hetero test sequence. 以此方式可避免降低传输信道的净数据传输速率。 In this manner can avoid reducing the net data transmission rate of the transmission channel.

为了保证大的统计可靠性,采用发射机和接收机都已知的测试序列的常规方法必须获得大量的出错,通常是几百个。 In order to ensure a large statistical reliability, using conventional methods known to both the transmitter and receiver must have a large number of test sequence error, typically several hundred. 对于普遍要求的非常低的比特出错率,譬如10-9的出错率,该常规方法需要很长的测量时间才能检测出相应的出错数。 For very low bit error rate of the common requirements, such as error rate of 10-9, the conventional method requires a long measurement time corresponding to the detected error number. 相反,本发明的方法基于的是在进行传输的同时分析测出的信噪比。 In contrast, the method of the present invention is based on the analysis of transmission performed simultaneously measured signal to noise ratio. 因为与可比较的、符号或比特流的分析相比,分析平均功率只需要相当短的测量时间,故用本发明的方法可以快速地确定传输质量。 As compared with comparable analysis, symbol or bit streams, analyzing the average power measurement requires only a relatively short time, so the method of the present invention can quickly determine the transmission quality.

按照所选择的编码和映射方法,在信噪比28(也称信噪比)和符号出错率或比特出错率之间总有一个单值的函数关系。 The coding and the mapping method chosen, the signal to noise ratio 28 (also referred to as SNR) there is always a single-valued function between the error rate and the symbol or bit error rate. 因此,不依赖于所选出的编码或映射方法,便可由信噪比鉴定信道和当前选择的调制及解调方法的传输特性。 Accordingly, without relying on encoding or mapping the selected method, the transmission characteristics can be identified by the channel SNR and the modulation and demodulation method currently selected. 因此,通过测量传输信道11的信噪比28可以确定当前调制/解调方法的编码及映射方法,使得可以调节为在刚好还允许的出错率下所希望的数据通过量。 Thus, by measuring the SNR of the transmission channel 11 is 28 to determine the current modulation / demodulation method and coding mapping method, it can be adjusted so that just at the error rate also allows a desired data throughput. 为此把测出的信噪比28馈入装置29以得出最高的数据传输速率30及编码和映射方法。 For this purpose the measured SNR 28 feeding 29 to derive the maximum data transfer rate of 30 and coding means and a mapping method. 按照已知的关系,根据优选地用分贝(db)数测出的信噪比28,由装置29确定当前调制和解调方法的最高数据传输速率30,该传输速率可以在现有的信噪比28条件下达到最大的数据通过量。 According to known relations, preferably in accordance with (db) measured by the number of 28 dB SNR, determines the maximum data transfer rate of the current modulation and demodulation method by means 2930, the transmission rate may be in the conventional signal to noise 28 under conditions than the maximum data throughput. 可以用最大允许出错率61和调制方法62作为装置29的转换特性曲线的参数。 61 can use the maximum allowable error rate and a modulation method of 62 as a characteristic parameter conversion means 29 of the curve. 根据测量出的传输信道11的传输质量28,以及根据当前调制/解调方法62和根据传输数字信息61时的最高允许出错率,可以按此方式选择出编码方案(编码1、编码2…编码6)和映射方案(映射1…映射6),使当前具有预定可靠性的调制/解调方法就实际情况达到最大的数据通过量。 According to the measured transmission quality of the transmission channel 11, 28, and the current modulation / demodulation method according to 62 and the maximum allowable error rate during the transmission of digital information 61 can be selected in this way encoding scheme (encoding 1, 2 ... encoding encoding 6) program and mapping (mapping maps 1 ... 6), so that the current modulation / demodulation method having a predetermined reliability actual situation to achieve maximum data throughput.

装置29可以安排在接收机12中,也可以安排在发射机10中。 Device 29 may be arranged in the receiver 12, it may be arranged in the transmitter 10. 无论如何都必须把测量出的信噪比28或把测量出的最高数据传输速率或选择出的编码和映射方法30经数据连接31传送到发射机。 In any case it must be measured 28 or the signal to noise ratio of the measured maximum data rate or the selected coding and mapping method 30 is connected via a data transfer to the transmitter 31.

可用来使当前调制/解调方法达到最大数据传输速率30的编码和映射方法的有关信息被馈送到发射机中的控制装置33。 It may be used to this modulation / demodulation method and coding information reaches mapping method of maximum data transfer rate of 30 is fed to the control device in the transmitter 33. 所述的控制装置根据最大可能的数据传输速率和为传输数字信息13而分别需要的数据传输速率32来选择实际使用的数据速率34,该数据速率34通过需确定的编码、映射及调制方案来实现。 Said control means based on the maximum possible data transfer rate for the transmission of digital information 13 and respectively 32 required data transmission rate to select the data rate actually used 34, the data rate is to be determined by the encoder 34, a mapping and modulation scheme achieve. 这种信息数据速率和/或编码、映射及调制方法既被馈送到发射机10的信道编码器14的相应部件,如编码器50、比特/符号转换器15和调制器17,而且还通过数据连接35被馈送到接收机12的信道解码器20的相应部件,如解调器55、符号/比特转换器24和解码器52等等。 Such information data rate and / or coding, and modulation mapping method is both fed to the respective components of the channel encoder 10 of the transmitter 14, such as encoder 50, bit / symbol converter 15 and the modulator 17, but also through a data connection 35 is fed to the receiver channel decoder 12 corresponding to the member 20, such as a demodulator 55, a symbol / bit converter 24 and a decoder 52 and the like.

下面来讲述在相应传输系统的系统启动时本发明装置的运行。 The following describes operation to start in the corresponding system of the transmission system of the device of the invention. 有意义的是,以最低可能的数据传输速率(相对于相应的调制方法)和最高可能的发送功率来实现传输系统的测量。 Interestingly, the lowest possible data transmission rate (with respect to the respective modulation method) and maximum transmit power may be implemented to measure the transmission system. 以此方式保证低的符号出错率,这是高质量地在接收机方测量信噪比的前提条件。 In this manner ensure low symbol error rate, which is a prerequisite for high quality noise ratio at the receiver side. 在此情况下,普遍采用的用于信号处理的自适应方法还具有最短的过渡状态持续时间,并且相对于最大的允许出错率可达到尽可能大的系统传输距离。 In this case, for adaptive signal processing methods commonly used in the transient state also has the shortest duration, and with respect to the maximum allowable error rate can be as large as possible to achieve the system transmission distance. 这样,在确定使传输信道(和当时采用的调制方法)具有最大可能数据传输速率的编码和映射方法时,只需要一次性测量即可。 Thus, when determining that the transmission channel (and the modulation method employed at the time) method of encoding and mapping the maximum possible data transfer rate can be only one-time measurement.

如果需要通过不同的调制方法来达到所希望的数据输送率,就要对每个可能的调制方案实施一个测量过程。 If necessary to achieve the desired delivery rate of the data by a different modulation method, it is necessary to implement a measurement process for each possible modulation scheme.

下面说明在系统运行期间本发明传输系统的工作。 Next, the operation of the transmission system of the present invention during system operation. 优选地,基于传输的数据流“在线”地实现传输信道测量。 Preferably, the data stream transmitted based on "on-line" to realize the transmission channel measurements. 因此不需要为实现有效数据之外的传输信道测量而降低净数据传输速率。 It is not necessary to realize the transmission channel other than the measurement data effectively reduce the net data transmission rate. 对实际采用的数据传输速率的信噪比进行测量还足以用来评定使用其它编码及映射规则所实现的数据传输传输速率的传输质量。 SNR actually employed data transmission rate is measured also sufficient to assess the transmission quality of data transmission using other transmission rate coding and mapping rule implemented. 从而,根据利用当前数据传输速率所进行的信噪比测量,系统还可以评定其它数据传输速率的传输特性。 Thus, according to the SNR measured using a current data transmission rate is performed, the transmission characteristics of the system may also be assessed in other data transmission rate. 只要不改变调制方法,就不需要对不同的数据传输速率进行多次迭代测量。 Without altering the modulation method, there is no need for measurement of the number of iterations of different data transmission rates.

只要仅依据新的编码规则及映射规则、而不依据变化的调制方法来改变数据传输速率,则在解调器中采用的自适应方法仍保留在过渡后的状态。 As long as only the encoding rules and based on the new mapping rule, without change according to the modulation method to change a data transmission rate adaptation method is used in the demodulator in the post-transition state is still reserved. 从而可以无间断地变换数据传输速率(“软切换”)。 Can be converted without interruption data transmission rate ( "soft handoff"). 然而,如果通过改变调制方案来匹配数据传输速率,就必须重新对系统进行测量,且不能进行“软切换”。 If, however, to match the data transmission rate by changing the modulation scheme, the system must be re-measured, and can not be "soft handover."

图2讲述了一个实施方案,其中通过在接收机方测定信噪比来确定最大可能的数据传输速率,并将其传递到发送方,发送方基于希望的和最大可能的数据传输速率来确定实际使用的数据传输速率,然后将其转送到发射机和接收机中的相应部件中。 Figure 2 describes an embodiment in which to determine the maximum possible data transfer rate is measured by the receiver side signal to noise ratio, and passes it to the sender, the sender is determined based on the desired and the actual maximum possible data transfer rate using data transmission rate, which is then forwarded to a respective transmitter and receiver components. 与之不同的是,在图3中说明了一个附加地进行发射机功率输出调节的实施例。 The difference is described an additional embodiment of the transmitter power output adjustment performed in FIG. 以下把发送功率同信道和所需传输方法的匹配称作“功率控制”。 The power of the transmission channel and matched with the required transmission method referred to as "power control." 只要图3有图2所示的相同装置,就采用相同的标号。 3 as long as the same apparatus shown in Figure 2, on the use of the same reference numerals. 在此实施方案中,在发射机方对接收机方测量的传输信道11的传输质量28进行分析。 In this embodiment, the analysis of the transmission quality of the transmission channel measurement receiver side 11 of the transmitter side 28. 为此发射机具有装置41,它象图2中的装置29那样测定编码方案及传输信道11的最大数据传输速率。 The transmitter has means 41 for this purpose, the maximum data transmission rate measuring device 29 such as a coding scheme and transmission channel 11 in FIG. 2 as it is.

除了由接收机12测量的、经数据连接40传递到发射机的传输质量28之外,还向装置41馈送为传输数字信息13所需要的数据速率32。 In addition to the measurement of the receiver 12, transmitted via a data connection 40 to transmitter 28 beyond the transmission quality, but also to the feeding means 41 for the transmission of digital information required data rate 13 32. 根据传输各个数字信息13需要的相应最高允许出错率选出具有实际数据传输速率34的编码或映射及调制方法。 Maximum allowable error rate corresponding to the selected data transmission rate with the actual mapping or encoding and modulation method for transmitting digital information 13 each require 34 according to. 如用图2所示的实施方案一样,把这个选出的数据传输速率34转送到信道编码器14和信道解码器20中。 As with the embodiment shown in FIG. 2, like the data transmission rate of the selected channel 34 is transferred to the channel encoder 14 and decoder 20.

由调制器14产生的信号值44还要在发射机10中转送到装置43以控制发送功率。 The signal value generated by the modulator 1444 in the transmitter 10 but also to the relay device 43 to control transmission power. 接着经传输信道11传输由装置43产生的信号45。 11 the transmission signal generated by the means 43 and then through the transmission channel 45. 此外,装置41还测定传输所需的最低发送功率。 In addition, the measurement apparatus 41 also minimum transmission power required for transmission. 测出的发送功率通过发送功率信号42馈送到传输信号放大器43中。 Measured transmission power by transmitting a power signal 42 is fed into the transmission signal amplifier 43.

按照测出的、传输信道11的传输质量46与同所选择的编码或映射及调制方法(具有数据传输速率34和某一最大允许出错率)相对应的传输质量47之间的差,对传输信号放大器43的发送功率进行匹配。 (Maximum allowable error rate and has a data transfer rate 34) corresponding to the difference between the quality of the transmission 47 in accordance with the measured transmission quality of the transmission channel 11 or the coding and modulation method with mapping the selected 46, the transmission the transmission power amplifier 43 matches. 换言之,如果测定的传输信道46的传输信号质量高于所需的传输质量47,则相应地减少发送功率。 In other words, if the transmission quality measurement signal transmission channel 46 is higher than the 47 required transmission quality, the transmission power is correspondingly reduced. 如果要求的传输质量47高于发射机的传输质量,则必须提高发送功率。 If the required transmission quality than the transmission quality of the transmitter 47, the transmission power must be increased.

于是,在此第二实施方案中,测出的信噪比46与为实现某一数据传输速率所需要的信噪比47之间的差便成为了提高还是降低当前发送信号功率的一个量度。 Thus, in this second embodiment, the difference between the measured SNR 47 to SNR 46 to achieve a desired data transfer rate becomes a measure of the increase or decrease of the current transmission signal power. 如果发送模块达不到为实现某一数据传输速率所需要的发送功率,则传输系统至多可以把当前最高可能的数据传输速率实现为数据传输速率。 If the transmission power of the transmission module not to achieve a desired data transmission rate, the transmission system can be up to the current maximum possible data transfer rate to achieve the data transmission rate.

本发明的这种使传输系统同所采用的传输信道相匹配的系统特别适合于与“不对称的数字用户线路”技术一起使用。 This makes the present invention a transmission system with a transmission channel used matches the system is particularly suitable for use with "Asymmetric Digital Subscriber Line" technique. 这种所谓的ADSL技术与其它的XDSL技术一样,可以使常规的铜芯电话线适合作为用于高数据密度应用的高速线路。 This so-called XDSL ADSL technology and other technologies, can make a conventional telephone line Copper is suitable as a high-speed data line high-density applications. 同时在同一线路上保留寻常的语音电话业务。 While retaining extraordinary voice telephony service on the same line. 在已有的电缆敷设基础上,这种技术可提供超出譬如ISDN许多倍的数据速率。 In conventional cable laying basis, this technology can provide many times exceeds such ISDN data rate. 以此消除了现有公共信息网络迄今只能传输语音、文本和低分辨率图象的局限。 In order to eliminate the existing public information network so far only for a limited transmission of voice, text and low-resolution images. 用这种技术可以把常规的铜电缆电话网改造成向所有家庭传输多媒体内容的强大系统。 With this technique can be a conventional copper telephone cable network transformation into a powerful system to all families transmission of multimedia content.

然而,运用常规的电话线要容忍较高的噪音成分,跨接的距离越长,这种噪音成分就越高。 However, the use of conventional telephone line to tolerate higher noise components, the longer the crossover distance, the higher this noise component. 这种技术跨接的距离平均在500米到6公里之间。 This technology across the average distance between 500 meters to 6 kilometers.

但是,噪音成分不仅随着长度增加而增加,且还由于相邻线路的串音而增加。 However, not only the noise component increases with increasing length, and also due to the crosstalk of the adjacent lines is increased. 借助于本发明的自适应性测量和匹配,传输系统可以在这样的方法中自动地与现有传输线路的质量相匹配。 By means of a measurement and adaptive matched, the transmission system of the present invention may be automatically matched to the quality of the transmission line in such conventional methods.

Claims (17)

1. 1. 使数据传输速率与传输信道(11)的传输质量相匹配的装置,具有一个质量测量器(27),用以测定传输信道(11)的传输质量(28),和一个确定装置(29),用以根据所述测定的传输质量(28)来确定传输信道(11)的最高数据传输速率。 Means the transmission quality match the data rate to the transmission channel (11) having a mass measuring device (27) for the transmission quality measurement transmission channel (11) (28), and a determination means (29), for (28) determining a transmission channel (11) of the maximum data transmission rate based on the transmission quality of the measurement.
2. 2. 根据权利要求1的装置,其特征在于,所述确定装置(29)根据某一最大允许的出错率来测定所述的最高数据传输速率(28)。 The apparatus according to claim 1, wherein said determining the maximum data transfer rate is measured (28) according to a certain maximum allowable error rate means (29).
3. 3. 根据权利要求1或2的装置,其特征在于,由所述用于测定所述最高数据传输速率(28)的确定装置(29)来确定相应的编码方法或映射方法。 Apparatus according to claim 1 or claim 2, wherein determining the maximum data transfer rate of the means for (28) determining means (29) to determine the appropriate mapping method or an encoding method.
4. 4. 根据权利要求1至3之一的装置,其特征在于,所述装置还包含一个选择装置(33),用于根据由确定装置(29)测定的最高数据传输速率(30)和根据某一需要的数据传输速率(32)来选择数据传输速率(34)。 The device according to claim 3, characterized in that said apparatus further comprises a selection means (33), according to the measurement by the determining means (29) the maximum data transfer rate (30) and according to some required the data transfer rate (32) to select a data transfer rate (34).
5. 5. 根据权利要求1至4之一的装置,其特征在于,用以选择所述数据传输速率(34)的所述选择装置(33)以某一最大允许出错率来选择编码方法和映射方法。 Apparatus according to any one of claims 1 to 4, wherein said means for selecting the data transfer rate (34) selection means (33) to the maximum allowable error rate to select a coding method and a mapping method.
6. 6. 根据权利要求1至5之一的装置,其特征在于,分别为不同调制方法测定传输质量(28)的质量测量器(27),为每个不同调制方法确定最高数据传输速率(30)的确定装置(29),和附加地选择所采用的调制方法的选择装置(33)。 Determining means to one of claims 1 to 5, characterized in that the transmission quality are measured for different modulation method (28) of the mass measuring unit (27), determine the highest data transfer rate (30) for each of the different modulation methods means (29), and additionally selecting a modulation method used in the selection means (33).
7. 7. 根据权利要求1至6之一的装置,其特征在于,用以经传输信道(11)传输数字信息(13)的发射机(10)含有:一个用于编码数字信息的数字信道编码装置(50),一个用于以符号(16)形式表示数字信息(13)的比特/符号转换器(15)和一个把符号(16)映射到信号值(18)以便经传输信道(11)进行传输的调制器(17),而且,所述接收机(12)含有:一个用于把接收到的信号值(19)转换成检测符号(23)的解调器(55)和一个把接收的符号流(23)转换成编码比特流(53)的符号/比特转换器(24)以及一个把所述检测的符号(23)表示为检测的数字信息(25)的解码装置(24)。 Apparatus according to any one of claims 1 to 6, characterized in that, for transmission of digital information (13) of the transmitter over a transmission channel (11) (10) comprising: a digital channel coding means for encoding the digital information (50 ), a form for showing digital information (13) bit / symbol converter (15) and a the symbol (16) to a signal value (18) at the symbol (16) for transmission via a transmission channel (11) modulator (17) and the receiver (12) comprising: a value for a signal (19) received into detected symbols (23) of the demodulator (55) and a stream of the received symbol (23) into coded symbol bit stream (53) / bit converter (24) and a said detected symbols (23) digital information (25) is detected by the decoding means (24).
8. 8. 根据权利要求1至7之一的装置,其特征在于,所述发射机(10)还包含:一个可调节的传输信号放大器(43)和一个控制装置(41),它用于按照由质量测量器(27)测定的传输信道(11)的传输质量(46)与所采用的具有某一最大允许出错率的数据传输速率所要求的传输质量(47)之间的差别来提高或降低传输信号放大器(43)的发送功率。 The apparatus of one of claims 1 to 7, characterized in that the transmitter (10) further comprises: an adjustable transmit signal amplifier (43) and a control means (41), which is used according to the measurement by a mass the difference between the transmission quality (47) the transmission quality (27) a transport channel (11) is measured (46) and the employed data transmission rate of a certain maximum allowable error rate required to increase or decrease the transmission signal an amplifier (43) transmission power.
9. 9. 用于匹配经传输信道(11)传输数字信息(13)的发送功率的装置,有一个质量测量器(27),它用于测量传输信道(11)的传输质量(28),和一个控制装置(41),它用于按照由质量测量器(27)测定的传输信道(11)的传输质量(46)与为传输数字信息(13)所采用的具有某一最大允许出错率的数据传输速率(34)所需要的传输质量(47)之间的差别来提高或者降低发送功率。 For the transmission of digital information (13) means for transmitting power to match over a transmission channel (11), a mass measuring device (27), which is used to measure the transmission channel (11) of the transmission quality (28), and a control means (41), which is used in accordance with the transmission quality measured by the quality measurement device (27) a transport channel (11) (46) and is having a maximum data transmission rate allowed error rate transmission of digital information (13) used (34) the difference between the transmission quality (47) needed to increase or decrease the transmission power.
10. 10. 使经传输信道(11)传输数字信息(13)的数据传输速率与传输信道(11)的质量相匹配的方法,具有以下步骤:测定所述传输信道(11)的传输质量(28),并且根据所述测定的传输质量和所采用的调制方法(28)来确定传输信道(11)的最高数据传输速率(30)。 So that over a transmission channel (11) for transmitting digital information (13) of the data transmission rate of the transmission channel (11) the method of mass matches, comprising the following steps: determining the transmission channel (11) of the transmission quality (28), and (28) determining a transmission channel (11) of the maximum data transfer rate (30) based on said determined transmission quality and the modulation method used.
11. 11. 根据权利要求10的方法,其特征在于,还根据某一最大允许出错率(61)来确定所述的最高数据传输速率(32)。 The method according to claim 10, characterized in that the further (61) to determine the maximum data transfer rate (32) according to a maximum allowable error rate.
12. 12. 根据权利要求10和11之一的方法,其特征在于,还根据所述确定装置(29)测定的传输信道(11)的最高数据传输速率(30)和根据需要的数据传输速率(32)及最高允许出错率(61)来选择一个数据传输速率(34)、映射算法和相应的编码方法。 The method of one of claims 10 11, characterized in that the further device (29) a transport channel (11) measured maximum data transfer rate (30) according to the determination and the data transmission rate required (32) and maximum allowable error rate (61) to select a data transfer rate (34), and the mapping algorithm corresponding encoding method.
13. 13. 根据权利要求10至12之一的方法,其特征在于,分别为不同的调制方法测定所述的传输质量(28),为各个调制方法确定所述传输信道(11)的最高可能的数据传输速率(30),并且根据为各个调制方法测定的最高数据传输速率(30)来选择需采用的调制方法。 10. The method according to claim 12, wherein, were measured transmission quality (28) according to different modulation methods, determining said transmission channel (11) for respective modulation methods the highest possible data transfer rate (30), and selects the modulation method employed for an individual in accordance with the modulation method is determined maximum data transfer rate (30).
14. 14. 根据权利要求10至13之一的方法,其特征在于,根据测定的传输信道(11)的传输质量(46)与被调节且具有某一最大允许出错率的数据传输速率所需要的传输质量(47)之间的差别来提高或者降低经传输信道(11)传输数字信息(13)的发送功率。 10. The method according to claim 13, characterized in that (11) of the transmission quality (46) is adjusted in accordance with the determined transport channel transmission quality and having a maximum allowable error rate of data transfer rates required ( the difference between the 47) to increase or decrease via a transmission channel (11) for transmitting digital information (13) transmission power.
15. 15. 根据权利要求10至14之一的方法,其特征在于,为传输所述的数字信息(13)执行以下的步骤:以符号(16)的形式表示该数字信息(13),把所述符号(16)映射到在信号值(18)上,经传输信道(11)传输该信号值(18),接收传输的信号值(21),检测接收到的信号值(21)和把该检测的信号值映射到检测符号(23)上,并且把该检测的符号(23)转换成检测的数字信息(25)。 The method according to any one of claims 10 14, characterized in that, to transmit the digital information (13) performs the following steps: indicates the digital information (13) in the form of symbols (16), said symbol ( 16) to a) and the signal on signal values ​​(18), (11) transmitting the signal value (18) via a transmission channel, the received signal value of the transmission (21), the detection signal is received values ​​(21 of the detection detected symbol values ​​are mapped to the (23), and that the detected symbols (23) into a digital detected information (25).
16. 16. 根据权利要求10至15之一的方法,其特征在于,把信噪比确定为传输质量(28)的量度。 The method according to any one of claims 10 15, wherein the SNR is determined as transmission quality (28) measure.
17. 17. 使经传输信道(11)传输数字信息(13)的发送功率与该传输信道(11)的传输质量相匹配的方法,具有以下步骤:测定所述传输信道(11)的信噪比(46),根据所述测定的传输信道(11)的信噪比(46)与为传输数字信息(13)所采用的数据传输速率(34)的信噪比(47)之间的差别来提高或者降低所述的发送功率。 So that over a transmission channel (11) for transmitting digital information (13) the transmission power of the transmission channel (11) of the transmission quality of match channel, comprising the following steps: determining the transmission channel (11) SNR (46) the transmission channel is the difference between the measured (11) SNR (46) with a data transfer rate (34) transmission of digital information (13) used to-noise ratio (47) to increase or decrease the said transmit power.
CN 99812792 1998-08-28 1999-08-27 Method and devie for adapting a transmission data rate or a transmitter power to the transmission quality of a trausmission channel CN1325573A (en)

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