CN100571239C - Synchronous pilot frequency sequence forming system and method in communication system - Google Patents

Synchronous pilot frequency sequence forming system and method in communication system Download PDF

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CN100571239C
CN100571239C CN 200610001081 CN200610001081A CN100571239C CN 100571239 C CN100571239 C CN 100571239C CN 200610001081 CN200610001081 CN 200610001081 CN 200610001081 A CN200610001081 A CN 200610001081A CN 100571239 C CN100571239 C CN 100571239C
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frequency
baseband signal
pilot
sequence
signal sequence
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CN101005470A (en
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皓 刘
孙卫军
杨学志
浩 江
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华为技术有限公司
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Abstract

本发明公开了一种通信系统中的同步导频序列生成系统,该系统包括:基带信号序列生成单元,用于生成基带信号序列;功率调整单元,用于将基带信号序列生成单元所生成的基带信号序列分别乘以不同的系数,使一部分基带信号序列所对应的离散谱线的功率为零,另一部分基带信号序列所对应的离散谱线为单频导频;复用单元,将功率调整单元输出的基带信号序列复用为一路数据传送给随机跳频单元;随机跳频单元,用于在每一帧的同步信道中随机改变单频导频的频谱位置;同步导频序列生成单元,用于根据随机跳频后的数据生成同步导频序列。 The present invention discloses a communication system synchronization pilot sequence generation system, the system comprising: a baseband signal sequence generating unit configured to generate a baseband signal sequence; power adjusting means for the baseband signal sequence generating unit generates a baseband signal sequence are multiplied by different coefficients, so that part of the baseband signal sequence corresponding to the discrete power spectrum is zero, another portion of the baseband signal corresponding to the sequence of discrete single frequency pilot line; multiplexing section, the power adjusting unit the baseband signal sequence output from the random hopping multiplexing unit transmits data to all the way; random hopping means for randomly changing the single-frequency spectral position of the pilot in each frame of the synchronization channel; synchronization pilot sequence generating means, with the data for generating random hopping synchronization pilot sequence. 应用本发明后,所生成的同步导频序列能够显著地提高频率偏移估计性能。 After application of the present invention, the generated pilot sequence synchronization can be remarkably improved frequency offset estimation performance.

Description

通信系统中的同步导频序列生成系统和方法 Communication system synchronization pilot sequence generating system and method

技术领域 FIELD

本发明涉及移动通信技术领域,更具体地,本发明涉及通信系统中的同步导频序列生成系统和方法。 The present invention relates to the technical field of mobile communications, and more particularly, the present invention relates to a communication system a synchronization pilot sequence generation system and method.

背景技术 Background technique

当前,全球数字移动通信系统(GSM)和码分多址(CDMA)移动通信系统在全世界范围内都得到了非常广泛的应用,而宽带码分多址(WCDMA ) 和码分多址2000 (CDMA2000)等移动通信系统也在一定范围内得到了应用。 At present, the global digital mobile communication system (GSM) and Code Division Multiple Access (CDMA) mobile communication systems around the world have been very widely used, and wideband code division multiple access (WCDMA) and Code Division Multiple Access 2000 ( CDMA2000) mobile communication system such also been applied within a certain range. 正交频分复用(OFDM)技术具有对抗符号间干扰(ISI)的能力,同时可以提供很高的频语效率,因此被视为下一代无线移动通信系统最有可能采用的传输技术之一。 Orthogonal frequency-division multiplexing (OFDM) techniques have the ability to combat inter-symbol interference (ISI), and can provide high frequency efficiency language, is seen as one of the next generation of transmission technologies wireless mobile communication system most likely used . OFDM技术已经在数字用户环路、数字音频/视频广播、 无线局域网和无线城域网等诸多领域得到了广泛应用。 OFDM technology has been in a digital subscriber loop, a digital audio / video broadcasting, wireless LAN and wireless metropolitan area networks, and many other fields has been widely used.

同步技术是通信系统中的关键技术之一,而载波频率偏移估计技术又是通信系统同步才支术中必不可少的一种。 Synchronization is a key technology in a communication system, the carrier frequency offset estimation and a communication system is synchronized before performing a necessary surgery. 比如,对于OFDM系统,载波频率偏移会引入载波间干扰(ICI),造成系统的有效信噪比(SNR)下降,使得系统性能恶化。 For example, for an OFDM system, a carrier frequency offset will introduce Inter-Carrier Interference (the ICI), resulting in an effective system SNR (SNR) decreases so that the system performance deteriorates. 为了使SNR下降小于O.ldB,最大频率偏移应该小于子载波间隔的1%。 In order to decrease SNR is less than O.ldB, the maximum frequency shift should be less than 1% of the subcarrier spacing. 在OFDM系统中, 一般采用跟踪环路来执行频率偏移检测, 并估计出频率偏移值,然后再进行频率补偿。 In an OFDM system, the tracking loop is generally used to perform frequency offset detection and the estimated frequency offset value, then the frequency compensation. 频率偏移的估计方法主要包括根据OFDM帧(Frame)中专用的同步块进行分析、根据快速傅立叶变换(FFT )输出的信号进行分析、利用OFDM符号的特性或者频谱进行分析等。 The method of estimating a frequency offset including analyzed according OFDM frame (Frame) dedicated sync blocks, according to a Fast Fourier Transform (FFT) analysis of the signal output, characteristics of the OFDM symbols using spectrum analysis or the like. 目前有一种基于单频导频序列的频率偏移估计方法。 Currently there is a single frequency pilot sequences based on a frequency offset estimation method. 在这种方法中,根据载波频率偏移会引起导频序列的频谱搬移,设计具有梳状频谱的导频序列,从而能够估计出频域偏移。 In this method, the carrier frequency offset according to the spectrum shifting causes pilot sequences, the pilot sequence design having a comb spectrum, so that the offset can be estimated in the frequency domain. 图1为现有技术中基于单频导频序列的同步信号的频i普图。 Figure 1 is based on frequency P i FIG single frequency pilot sequence synchronization signal of the prior art. 如图l所示,导频序列具有梳状频i普,从而可以估计出频域 As shown in FIG. L, the pilot sequence has a comb-like frequency P i, can be estimated in the frequency domain

在这种基于单频导频序列的频率偏移估计方法中,最大可以检测出的频率偏移估计是梳状频点间隔的0.5倍。 In this single frequency offset estimation method based on the pilot sequences in the frequency, the maximum frequency offset that can be detected is estimated comb bins 0.5 times. 但是,如果载波频率偏移超过这个范围,则采用这种单频导频序列的频率偏移方法并不能准确纟全测出频率偏移。 However, if the carrier frequency offset is more than this range, the use of such a single frequency pilot sequence frequency offset method does not accurately measure the frequency offset whole Si. 这种具有梳状频谱的单频导频序列,使得频率偏移精度仅为一个子载波间 This has the single frequency comb spectrum pilot sequence, so that only the accuracy of frequency offset between a subcarrier

隔。 Septum. 对于多载波系统而言,采用这种具有梳状频谱的单频导频序列明显地引入ICI,并不能满足通信系统所要求的较低误码率指标。 For multi-carrier system, with this comb spectrum has a single-frequency pilot sequence significantly the ICI introduced, and can not meet the low BER required in the communication system.

发明内容 SUMMARY

有鉴于此,本发明的主要目的在于提供了一种通信系统中的同步导频序列生成系统,以生成能够提高频率偏移估计性能的同步导频序列。 In view of this, the main object of the present invention to provide a communication system synchronization pilot sequence generation system can be improved to generate a frequency offset estimation performance guide synchronization pilot sequence.

本发明的另一目的在于提供一种通信系统中的同步导频序列生成方法, 以生成能够提高频率偏移估计性能的同步导频序列。 Another object of the present invention is to provide a method for generating a sequence of a communication system to be synchronized pilot, to generate the frequency offset estimation performance can be improved synchronization pilot sequence.

为达到上述目的,本发明的技术方案是这样实现的: To achieve the above object, the technical solution of the present invention is implemented as follows:

一种通信系统中的同步导频序列生成系统,该系统包括: A communication system a synchronization pilot sequence generation system, the system comprising:

基带信号序列生成单元,用于生成基带信号序列; The baseband signal sequence generating unit configured to generate a baseband signal sequence;

功率调整单元,用于将基带信号序列生成单元所生成的基带信号序列分別乘以不同的系数,使一部分基带信号序列所对应的离散镨线的功率为零, 另一部分基带信号序列所对应的离散错线为单频导频; Power adjusting means for the baseband signal sequence of the baseband signal sequence generating unit generates are multiplied by different coefficients, of the power part of the baseband signal sequence corresponding to the discrete praseodymium line is zero, the other part of the baseband signal sequence corresponding to discrete dislocation line is a single frequency pilot;

复用单元,将功率调整单元输出的基带信号序列复用为一路数据传送给随机跳频单元; Multiplexing unit, the baseband signal sequence output from the power adjusting unit to the random hopping multiplexing transmission data into one unit;

随机跳频单元,用于在每一帧的同步信道中随机改变单频导频的频谱位 Random hopping means for randomly changing the single-frequency spectrum of pilot bits in each frame synchronization channel

置; Set;

同步导频序列生成单元,用于根据随机跳频后的数据生成同步导频序 Synchronization pilot sequence generating means, for synchronizing the pilot sequence according to the random data generating hopping

列; Columns;

其中基带信号序列生成单元与功率调整单元连接,功率调整单元与复用单'元连接,复用单元与随机跳频单元连接,随机跳频单元与同步导频序列生成单元连接。 Wherein the baseband signal sequence generating unit and a power adjustment unit is connected, and the power adjustment unit multiplexes a single 'cell connection, multiplexing means connected to the random frequency hopping unit, the synchronization unit and random hopping sequence generator connected to the pilot.

所述基带信号序列生成单元包括: The baseband signal generating unit sequence comprising:

宽带成分生成单元,用于输出所述功率为零的离散镨线所对应的基带信 Broadband component generating unit for outputting said baseband signal discrete power Pr is zero corresponding to the line

号序列; Sequence numbers;

窄带成分生成单元,用于输出所述单频导频的离散语线所对应的基带信号序列。 Narrowband component generating unit for outputting said baseband signal sequence of discrete single frequency pilot line corresponding language.

所述离散镨线为单频导频的镨线为单根。 The discrete line praseodymium praseodymium single frequency line is a single pilot. 所述离散镨线的功率为零的镨线为多根。 The power line zero discrete praseodymium praseodymium plurality of lines.

所述随才几跳频单元用于在每一帧的同步信道中随机改变单频导频的频谱位置,使得单频导频之间的频率间隔大于信道相干带宽。 With only a few of the frequency hopping unit for randomly changing the single-frequency spectral position of the pilot in the synchronization channel of each frame, so that the frequency between the frequency interval greater than a single frequency pilot channel coherence bandwidth. ' '

所述通信系统为OFDM系统。 Said communication system is an OFDM system.

一种通信系统中的同步导频序列生成方法,包括以下步骤: A communication system a synchronization pilot sequence generating method, comprising the steps of:

A、 生成基带信号序列; A, to generate a baseband signal sequence;

B、 将基带信号序列分别乘以不同的系数,使一部分基带信号序列所对应的离散谱线的功率为零,另一部分基带信号序列所对应的离散谱线为单频导频; B, and power of the baseband signal sequence are multiplied by different coefficients, so that part of the baseband signal discrete lines corresponding to the zero sequence, the other part of the baseband signal corresponding to the sequence of discrete single frequency pilot line;

C、 将步骤B输出的基带信号序列复用为一路数据,并在每一帧的同步信道中随机改变单频导频的频谱位置; C, the baseband signal B output sequence of steps multiplexed into one data, and randomly changing the single-frequency spectral position of the pilot in each frame of the synchronization channel;

D、 根据随机跳频后的数据生成同步导频序列。 D, according to the data generating random hopping synchronization pilot sequence.

生成功率为零的离散谱线所对应的基带信号序列;生成所述单频导频的离散谱线所对应的基带信号序列。 The baseband signal sequence to generate a power spectrum corresponding to discrete zero; generating a single frequency pilot sequence in frequency the baseband signal corresponding to a discrete spectrum.

在每一帧的同步信道中随机改变单频导频的频谱位置,'使得单频导频之间的频率间隔大于信道相干带宽。 In the synchronization channel of each frame randomly change the position of single-frequency spectrum pilot, 'such a frequency between the frequency interval greater than a single frequency pilot channel coherence bandwidth.

所述离散谱线为单频导频的谱线为单根。 The discrete frequency spectrum is a single line guide for the single frequency.

所述离散谱线的功率为零的语线为多根。 The discrete power spectral lines to zero plurality of language.

步骤C包括:随机改变单频导频的频谱位置,其中连续的多个帧中的单频导频的频语间隔是不等的。 Step C comprises: randomly changing the position of single-frequency spectrum pilot, wherein a plurality of consecutive frames of speech frequency single frequency pilot spacing is unequal.

步骤C包括:随机改变单频导频的频谱位置,其中连续的多个帧中的单频导频的位置为随机跳频分布。 Step C comprises: randomly changing the position of single-frequency spectrum pilot, wherein a plurality of consecutive frames of a single pilot frequency hopping random distribution location. 所述通信系统为OFDM系统。 Said communication system is an OFDM system.

一种通信系统中的同步导频序列生成系统,包括依次相连的串并转换单元、映射单元、快速傅立叶逆变换(IFFT) /离散傅立叶逆变换(IDFT)单元、并串转换单元; A communication system a synchronization pilot sequence generating system includes a serial parallel conversion unit connected in sequence, a mapping unit, an Inverse Fast Fourier Transform (IFFT) / Inverse Discrete Fourier Transform (IDFT) unit, a parallel-serial conversion means;

串并转换单元用于将接收的一路数据转换为多路并行数据,映射单元用 Parallel conversion means for converting the data received by way of multiple parallel data, mapping unit with

于将多路并行数据以一定规则映射到各个子载波上,IFFT/IDFT单元用于对映射后的数据执行反傅立叶变换后传送给并串转换单元输出;该系统还包括: In the multi-channel parallel data mapped to each subcarrier to a certain rule, IFFT / IDFT unit for transmitting an output to serial conversion unit performs inverse Fourier transform on the mapped data; the system further comprising:

基带信号序列生成单元,用于生成基带信号序列; The baseband signal sequence generating unit configured to generate a baseband signal sequence;

功率调整单元,用于将基带信号序列生成单元所生成的基带信号序列分别乘以不同的系数,使一部分基带信号序列所对应的离散谱线的功率为零, 另一部分基带信号序列所对应的离散谱线为单频导频; Power adjusting means for the baseband signal sequence of the baseband signal sequence generating unit generates are multiplied by different coefficients, so that the discrete spectral lines of the power part of the baseband signal sequence corresponding to zero, another portion of the baseband signal sequence corresponding to discrete single frequency spectrum of pilot;

复用单元,将功率调整单元输出的基带信号序列复用为一路数据传送给串并转换单元; Multiplexing unit, the baseband signal sequence output from the power adjusting unit into one multiplexed transmission data to parallel conversion unit;

随机跳频控制逻辑器,用于向映射单元发送随机跳频命令,映射单元进一步用于根据所述随机跳频命令在每一帧的同步信道中随机改变单频导频的频i普位置; Random hopping control logic, for transmitting a command to the random hopping mapping unit, the mapping unit is further configured according to the random frequency hopping synchronization channel command in each frame randomly change the position P i-frequency single-frequency pilot;

其中随机跳频控制逻辑器与映射单元连接。 Wherein the random hopping control logic connected to the mapping unit.

所述基带信号序列生成单元包括: The baseband signal generating unit sequence comprising:

宽带成分生成单元,用于输出所述幅值为零的离散谱线所对应的基带信号序列; Broadband component generating unit for outputting said baseband signal sequence of discrete amplitude zero spectral line corresponding to;

窄带成分生成单元,用于输出所述单频导频的离散"i普线所对应的基带信号序列。 Narrowband component generating unit for discrete baseband signal sequence P i corresponding to the output line of the single frequency pilot. "

所述通信系统为OFDM系统。 Said communication system is an OFDM system. 上述技术方案中可以看出,在本发明中,同步导频序列生成系统中的功率调整单元,用于将基带信号序列生成单元所生成的基带信号序列分别乘以不同的系数,使一部分基带信号序列所对应的离散谱线的功率为零,另一部 Above technical solutions can be seen, in the present invention, the synchronization pilot power adjustment unit pilot sequence generation system for the baseband signal sequence of the baseband signal sequence generating unit generates are multiplied by different coefficients, so that part of the baseband signal sequence corresponding to the discrete power spectrum is zero, another

分基带信号序列所对应的离散谱线为单频导频;并且还包括随机跳频单元, 用于在每一帧的同步信道中随机改变单频导频的频谱位置。 Partial sequence corresponding to the baseband signal spectrum is discrete single frequency pilot; random hopping, and further comprising means for randomly changing the single-frequency spectral position of the pilot in the synchronization channel of each frame. 由此可见,在本 Thus, in this

发明中,生成的同步导频序列实质上由两部分組成: 一部分是具有零功率谱的成分,另一部分是具有较高功率谱的成分,通过改变单频导频的频谱位置, 比如优选使得单频导频之间的频率间隔大于信道相干带宽,从而可以有效地克服由于频率选择性信道衰落而造成的频率偏移估计误差,进而能够显著地提高频率偏移估计性能。 Invention, a synchronization pilot sequence generated essentially consists of two parts: one is a component having a zero power spectrum, the other part is a component of the spectrum with higher power, by changing the single-frequency spectral position of the pilot, such that preferably a single frequency to the frequency interval between the frequency is greater than the channel coherence bandwidth, which can effectively overcome the frequency offset due to frequency selective fading caused by channel estimation error, and thus can significantly increase the frequency offset estimation performance.

附图说明 BRIEF DESCRIPTION

图1为现有技术中基于单频导频序列的频率偏移估计的同步信号的频谱图。 Figure 1 is a spectrum of a synchronization signal based on the single frequency offset estimation pilot sequence in the frequency of the prior art.

图2为根据本发明一实施例的同步导频序列的离散频率谱线示意图。 FIG 2 is a schematic diagram of a discrete frequency spectrum pilot sequence synchronization guide an embodiment of the present embodiment of the invention. 图3为根据本发明一实施例的连续三帧中同步导频序列的离散频率谱线示意图。 3 is a schematic diagram of a discrete frequency spectrum of three consecutive frame synchronization embodiment the pilot sequence according to an embodiment of the present invention.

图4为根据本发明一实施例的同步导频结构的示意图。 FIG 4 is a schematic configuration of a frequency synchronization according to an embodiment of the guide of the present invention. 图5为根据本发明一实施例的同步导频序列生成系统的结构示意图。 FIG 5 is a schematic view of the embodiment of the timing guide pilot sequence generation system according to an embodiment of the present invention. 图6为根据本发明一实施例的同步导频序列生成方法的示范性流程示意图。 FIG 6 is a schematic flow chart of an exemplary sequence generation method according to a frequency synchronization guide an embodiment of the present invention.

图7为根据本发明一实施例的同步导频序列生成系统的示范性结构示意图。 7 is a schematic view of an exemplary structure of the frequency synchronization sequence generation system according to an embodiment of the guide of the present invention.

具体实施方式 Detailed ways

为使本发明的目的、技术方案和优点表达得更加清楚明白,下面结合附图及具体实施例对本发明再作进一步详细的说明。 For purposes of the present invention, technical solutions and advantages clearer to obtain expression, in conjunction with the accompanying drawings and specific embodiments of the present disclosure is further described in detail. 为了提高频率偏移估计性能,本发明提出一种用于频率偏移估计的同步导频序列。 In order to improve the frequency offset estimation performance, the present invention proposes a frequency offset estimation pilot sequence for synchronization. 图2为根据本发明的同步导频序列的离散频率镨线示意图。 FIG 2 is a schematic diagram of a discrete frequency synchronization praseodymium guide wire of the present invention the pilot sequence. 如图 Figure

2所示,该同步导频序列主要由两部分组成: 一部分是功率谱为零的离散频率谱线,称为宽带成分;另一部分仅包含一根离散频率谱线,即单频导频, 称为窄带成分。 2, the pilot sequence synchronization is mainly composed of two parts: a part of the power spectrum is zero discrete frequency spectrum, referred to as wideband component; comprise only a portion of the other discrete frequency spectrum, i.e. single frequency pilot, said narrowband component.

同步导频序列所包含的单频导频可以通过跳频的方式,即在每一帧的同步信道中改变单频导频的频谱位置,从而克服频率选择性信道衰落,提高接收端的频率偏移估计性能。 The pilot synchronization sequence comprises single frequency pilot can, i.e. in a way changed by frequency hopping synchronization channel spectral position of each frame of the single-frequency pilot to overcome frequency selective fading channel, the receiving side to improve the frequency offset estimation performance. 其中,连续的多个无线帧中的窄带成分的位置可以随机跳频分布,而且连续的多个无线帧中的窄带成分的位置之间的间隔可以是不等间隔的,也可以是等间隔的。 Wherein the continuous components of the plurality of narrowband radio frame may be randomly hopping the position of the distribution, and the spacing between a plurality of successive component positions narrowband radio frame interval can be unequal, may be equally spaced .

优选地,连续的多个无线帧中的窄带成分的位置之间的间隔大于信道的相干带宽,从而有效地克服由于频率选择性信道衰落而造成的频率偏移估计误差。 Preferably, a plurality of consecutive intervals greater than the coherence bandwidth of the channel between the position of the narrowband radio frame components, so as to effectively overcome the frequency selective channel fading due to the frequency offset estimation error caused. 窄带成分的最高频率可以限制在某个频率范围之内,并且宽带成分表现为除了单频导频以外的离散频语。 The highest frequency narrow band component may be limited within a certain frequency range, and in addition to the broadband component showed a single frequency discrete frequency pilot language. 这样,由宽带成分和窄带成分组成的同步导频序列,峰均比非常小,接近于零分贝。 Thus, a broadband pilot component and a synchronization component composition narrowband pilot sequence, PAPR is very small, close to zero decibels.

下面以连续的三个无线帧为例进行说明。 The following three consecutive radio frames as an example. 图3为根据本发明的连续三帧中同步导频序列的离散频率傳线示意图。 3 is a schematic of discrete frequency transmission line according to a pilot sequence according to the present invention, three consecutive frames in the timing guide. 如图3所示,在连续的三个无线帧中,同步导频序列所包含的单频导频可以通过跳频的方式,即在每一帧的同步信道中改变单频导频的频谱位置,从而克服频率选择性信道衰落,提高接收端的频率偏移估计性能。 3, in three consecutive radio frames, the synchronization pilot sequence contains pilots may be single-frequency, i.e., changes in the synchronization channel of each frame by way of a frequency hopping position of the single-frequency spectral pilot to overcome frequency selective fading channel, the receiving side to improve frequency offset estimation performance. 在图3中,Ll表示无线帧1和无线帧2上的单频导频之间的频率间隔,L2表示无线帧2和无线帧3上的单频导频之间的频率间隔。 In FIG. 3, Ll represents a single radio frame 1 and the frame 2 radio frequency to the frequency interval between the frequency, L2 represents a single radio frame 2 on the frame 3 and the radio frequency to the frequency interval between the frequency. 若单频导频之间的频率间隔Ll和L2大于信道相干带宽,就可以有效地克服由于频率选择性信道衰落而造成的频率偏移估计误差。 If the frequency of the single frequency between the frequency spacing guide Ll and L2 is greater than the channel coherence bandwidth, it can be effectively overcome frequency due to frequency selective fading channel estimation error caused by offset.

以上虽然以三帧为例进行了说明,然而,实际上单频导频还可以在三帧以上跳频排列,其中单频导频之间的频率间隔可以相同,也可以不相同。 Although the above has been described as an example in three, however, in practice a single pilot frequency hopping may also be arranged in more than three, wherein the single frequency to the frequency interval between the frequency may be the same, may not be the same.

图4为根据本发明的同步导频结构的示意图。 FIG 4 is a schematic configuration of a frequency synchronization in accordance with the present invention the guide. 在图2中,H1和H2是 In FIG. 2, H1 and H2 are

两段完全相同的序列,用来进行定时同步估计;H3序列用来进行频率偏移估计。 Two identical sequences, used to estimate the timing synchronization; H3 of the sequence used for frequency offset estimation. 其中,序列H3就可以采用上述本发明的同步导频序列,也就是说, 序列H3由两部分组成: 一部分是功率i普为零的离散频率谱线,也就是宽带成分;另一部分仅包含一根离散频率谱线,即单频导频,称为窄带成分。 Wherein, H3 sequence can guide synchronous pilot sequence of the present invention, i.e., H3 sequence consists of two parts: one is the power P i discrete frequency spectrum is zero, i.e. wideband component; comprise only a portion of the other root discrete frequency spectrum, i.e. a single pilot frequency, called narrowband component.

针对本发明的同步导频序列,本发明提供了同步导频序列的生成系统, 如图5所示的同步导频序列生成系统,包括: For synchronous pilot pilot sequence of the present invention, the present invention provides a system generating the synchronization pilot sequences, as shown in FIG. 5 pilot sequence synchronization generation system, comprising:

基带信号序列生成单元,用于生成基带信号序列; The baseband signal sequence generating unit configured to generate a baseband signal sequence;

功率调整单元,用于将基带信号序列生成单元所生成的基带信号序列分别乘以不同的系数,使一部分基带信号序列所对应的离散谱线的功率为零, 另一部分基带信号序列所对应的离散谱线为单频导频;比如,系数al可以为零,从而使得一部分基带信号序列所对应的离散语线的功率为零。 Power adjusting means for the baseband signal sequence of the baseband signal sequence generating unit generates are multiplied by different coefficients, so that the discrete spectral lines of the power part of the baseband signal sequence corresponding to zero, another portion of the baseband signal sequence corresponding to discrete single frequency pilot line; for example, al coefficients may be zero, so that the power part of the baseband signal sequence corresponding to the zero line of discrete words.

复用单元,将功率调整单元输出的基带信号序列复用为一路数据传送给随机跳频单元; Multiplexing unit, the baseband signal sequence output from the power adjusting unit to the random hopping multiplexing transmission data into one unit;

随机跳频单元,用于在每一帧的同步信道中随机改变单频导频的频谱位 Random hopping means for randomly changing the single-frequency spectrum of pilot bits in each frame synchronization channel

置; Set;

同步导频序列生成单元,用于根据随机跳频后的数据生成同步导频序 Synchronization pilot sequence generating means, for synchronizing the pilot sequence according to the random data generating hopping

列; Columns;

其中基带信号序列生成单元与功率调整单元连接,功率调整单元与复用单元连接,复用单元与随机跳频单元连接,随机跳频单元与同步导频序列生成单元连接。 Wherein the baseband signal sequence generating unit and a power adjustment unit is connected, the power adjusting unit multiplexing unit connected to the multiplexing means connected to random hopping unit, the synchronization unit and random hopping sequence generator connected to the pilot.

其中,图5中的基带信号序列生成单元可以包括:窄带成分生成单元, 用于输出所述功率为零的离散谱线所对应的基带信号序列;宽带成分生成单元,用于输出所述单频导频的离散谱线所对应的基带信号序列。 Wherein the 5 baseband signal sequence generating unit may include: a narrow band component generating unit for outputting said baseband signal sequence zero power spectrum corresponding to the discrete; broadband component generation means for outputting said single frequency the baseband signal of the pilot sequence corresponding to a discrete spectrum.

图6为根据本发明实施例的生成同步导频序列的方法的流程示意图。 FIG 6 is a schematic flow chart of the synchronization method of conducting a pilot sequence generated in accordance with an embodiment of the present invention. 如图6所示,该方法包括以下步骤: 6, the method comprising the steps of:

步骤601:生成基带信号序列; Step 601: generate a baseband signal sequence;

步骤602:将基带信号序列分别乘以不同的系数,使一部分基带信号序列所对应的离散谱线的功率为零,另一部分基带信号序列所对应的离散谱线为单频导频; Step 602: The power of the baseband signal sequence are multiplied by different coefficients, so that part of the baseband signal discrete lines corresponding to the zero sequence, the other part of the baseband signal corresponding to the sequence of discrete single frequency pilot line;

在这里,单频导频序列的离散频谱上优选只有单根i普线,而功率为零的离散谱线可以为多根,其中可以将单频导频的最高频率限制在一定的频率范围之内。 Here, the single-frequency pilot sequence preferably only a single discrete spectral line P i, and the power line may be zero discrete plurality of which may be single frequency pilot frequency the highest frequency in a certain frequency range limits of Inside.

步骤603:将基带信号序列复用为一路数据,并在每一帧的同步信道中随机改变单频导频的频谱位置; Step 603: The baseband signal multiplexed into one data sequence, and change the spectral position of the random single-frequency pilot in each frame of the synchronization channel;

在这里,连续的多个无线帧中的窄带成分的位置可以随机跳频分布。 Here, the continuous component of the plurality of narrowband radio frame positions may be randomly distributed hopping. 连续的多个无线帧中的窄带成分的位置之间的间隔是不等间隔的。 An interval between a plurality of successive component positions narrowband radio frame interval is unequal. 连续的多个无线帧中的窄带成分的位置之间的间隔大于信道的相干带宽。 A plurality of consecutive intervals greater than the coherence bandwidth of the channel between the position of the narrowband radio frame component.

步骤604:根据随机跳频后的数据生成同步导频序列。 Step 604: The data generating random hopping synchronization pilot sequence.

在这里,优选将接收的随机跳频后的一路复用数据转换为多路并行数据,然后将多路数据以一定规则映射到各个子载波上,再由IFFT/IDFT单元进行反傅立叶变换后传送给并串转换单元输出,从而生成同步导频序列,由此产生的同步导频序列峰均比非常小,接近于零分贝。 After this, the preferred way to convert the multiplexed data received random hopping parallel data is multiplexed, the multiplexed data is then mapped to a certain rule to each sub-carrier, then the inverse Fourier transform by the IFFT / IDFT unit transmits to-serial conversion unit outputs, thereby generating a pilot sequence synchronization, frequency synchronization pilot sequence resulting PAPR is very small, close to zero decibels. 可选地,还可以在串并转换中、IFFT/IDFT过程、并串转换过程中来执行跳频操作。 Alternatively, and also in the string conversion, IFFT / IDFT process, and the parallel to serial conversion is performed during the hopping operation. 也就是说, 随机跳频操作可以在复用之后的任意时刻执行。 In other words, random hopping operation can be performed at any time after multiplexing.

以上方法可以适用于各种通信系统,尤其适用于OFDM通信系统。 The above method can be applied to various communication systems, especially for an OFDM communication system. 本领域技术人员可以意识到,本发明对于其它的多载波通信系统同样适用。 Those skilled in the art can appreciate that the present invention is equally applicable to other multi-carrier communication system.

图7为根据本发明一实施例的同步导频序列生成系统的示范性结构示意图。 7 is a schematic view of an exemplary structure of the frequency synchronization sequence generation system according to an embodiment of the guide of the present invention. 此处假设该通信系统为OFDM通信系统。 Here it is assumed that the communication system is an OFDM communication system. 如图7所示,该系统包括: 包括依次相连的串并转换单元、映射单元、IFFT/IDFT单元、并串转换单元; As shown, the system 7 includes: a serial-parallel conversion unit connected in sequence, a mapping unit, IFFT / IDFT unit, and the serial conversion unit;

串并转换单元用于将接收的一路数据转换为多路并行数据,映射单元用于将多路并行数据以一定规则映射到各个子载波上,IFFT/IDFT单元用于进行反傅立叶变换后传送给并串转换单元输出;该系统还包括: Parallel conversion means for converting the data received by way of multiple parallel data, parallel data mapping unit configured to multiplex a certain rule to each sub-carrier mapping, IFFT / IDFT unit for performing inverse Fourier transform to the transmission serial conversion unit outputs; the system further comprising:

基带信号序列生成单元,用于生成墓带信号序列; The baseband signal sequence generating means for generating a tomb with a signal sequence;

功率调整单元,用于将基带信号序列生成单元所生成的基带信号序列分别乘以不同的系数,使一部分基带信号序列所对应的离散谱线的功率为零,另一部分基带信号序列所对应的离散谱线为单频导频; Power adjusting means for the baseband signal sequence of the baseband signal sequence generating unit generates are multiplied by different coefficients, so that the discrete spectral lines of the power part of the baseband signal sequence corresponding to zero, another portion of the baseband signal sequence corresponding to discrete single frequency spectrum of pilot;

复用单元,将功率调整单元输出的基带信号序列复用为一路数据传送给串并转换单元; Multiplexing unit, the baseband signal sequence output from the power adjusting unit into one multiplexed transmission data to parallel conversion unit;

随机跳频控制逻辑器,用于向映射单元发送随机跳频命令,映射单元进一步用于根据所述随机跳频命令在每一帧的同步信道中随机改变单频导频的频谱位置。 Random hopping control logic, for transmitting a command to the random hopping mapping unit, the mapping unit is further used for spectral position of the single-frequency pilot random hopping synchronization channel change command randomly according to each frame.

优选地,其中基带信号序列生成单元包括: Preferably, the sequence in which the baseband signal generating means comprises:

宽带成分生成单元,用于输出幅值为零的离散谱线所对应的基带信号序 Broadband component generation unit, a baseband signal amplitude is zero order output corresponding to the discrete spectral lines

列; Columns;

窄带成分生成单元,用于输出单频导频的离散i普线所对应的基带信号序列。 Narrowband component generation means for outputting a single-frequency pilot sequence in frequency the baseband signal discrete lines corresponding to P i.

以上实施例中,随机跳频控制逻辑器向映射单元发送随机跳频命令,由映射单元再根据随机跳频命令在每一帧的同步信道中随机改变单频导频的频谱位置。 In the above embodiment, the control logic sends a random hopping random hopping command to the mapping unit, and then randomly changed according to a random frequency hopping command single-frequency spectral position of the pilot in each frame of a synchronization channel mapping unit. 然而,本发明并不局限于此,还可以在串并转换中、IFFT/IDFT 过程、并串转换过程中执行跳频操作。 However, the present invention is not limited to this, also in the serial to parallel conversion, IFFT / IDFT process, and the string conversion process performs hopping operation. 也就是说,随机跳频操作可以在复用完后的任意时刻执行。 In other words, random hopping operation can be executed at any time after the multiplexing. 因此,随机跳频控制逻辑器可以相应分别连接到串并转换单元或IFFT/IDFT单元或并串转换单元,以发送随机跳频命令。 Thus, the control logic random hopping may be respectively connected to the corresponding parallel conversion unit or IFFT / IDFT unit or a parallel-serial conversion unit to transmit the random frequency hopping command.

以上此处以OFDM系统为例对本发明进行了描述,但是本领域技术人员可以意识到,本发明对于其它的多载波通信系统同样适用。 In the above OFDM system as an example where the present invention has been described, those skilled in the art can appreciate that the present invention is equally applicable to other multi-carrier communication system. 用OFDM为例进行说明仅为示范性的,并不用于对本发明进行限制。 With OFDM as an example is exemplary only, and are not intended to limit the present invention.

以上所述,仅为本发明的较佳实施例而已,并非用于限定本发明的保护范围。 The above are only preferred embodiments of the present invention but are not intended to limit the scope of the present invention. 凡在本发明的精神和原则之内,所作的任何修改、等同替换、改进等, 均应包含在本发明的保护范围之内。 Any modification within the spirit and principle of the present invention, made, equivalent substitutions, improvements, etc., should be included within the scope of the present invention.

Claims (17)

1、一种通信系统中的同步导频序列生成系统,其特征在于,该系统包括: 基带信号序列生成单元,用于生成基带信号序列; 功率调整单元,用于将基带信号序列生成单元所生成的基带信号序列分别乘以不同的系数,使一部分基带信号序列所对应的离散谱线的功率为零,另一部分基带信号序列所对应的离散谱线为单频导频; 复用单元,将功率调整单元输出的基带信号序列复用为一路数据传送给随机跳频单元; 随机跳频单元,用于在每一帧的同步信道中随机改变单频导频的频谱位置; 同步导频序列生成单元,用于根据随机跳频后的数据生成同步导频序列; 其中基带信号序列生成单元与功率调整单元连接,功率调整单元与复用单元连接,复用单元与随机跳频单元连接,随机跳频单元与同步导频序列生成单元连接。 1, a communication system a synchronization pilot sequence generating system, characterized in that the system comprising: a baseband signal sequence generating unit configured to generate a baseband signal sequence; power adjusting means for the generated baseband signal sequence generation unit the base band signal coefficients are multiplied by different sequences, so that part of the baseband signal sequence corresponding to the discrete power spectrum is zero, another portion of the baseband signal corresponding to the sequence of discrete single frequency pilot line; multiplexing unit, the power the baseband signal sequence to adjust the cell output random hopping multiplexing unit transmits data to all the way; random hopping means for randomly changing the single-frequency spectral position of the pilot in each frame of the synchronization channel; synchronization pilot sequence generation unit , the pilot sequence generator for synchronizing data according to random hopping; wherein the baseband signal sequence generating unit and a power adjustment unit is connected, the power adjusting unit multiplexing unit connected to the multiplexing means connected to random hopping unit, random hopping the synchronization unit connected to the pilot sequence generator.
2、 根据权利要求1所述的同步导频序列生成系统,其特征在于,所述基带信号序列生成单元包括:宽带成分生成单元,用于输出所述功率为零的离散谱线所对应的基带信号序列;窄带成分生成单元,用于输出所述单频导频的离散谱线所对应的基带信号序列。 2. The guide of claim 1 frequency synchronization sequence generation system as claimed in claim, wherein said signal sequence generating baseband unit comprising: a broadband component generating unit for outputting the power is zero discrete spectral lines corresponding to the baseband signal sequence; narrowband component generating unit for outputting said baseband signal sequence of discrete single frequency pilot line corresponds.
3、 根据权利要求1所述的同步导频序列生成系统,其特征在于,所述离散谱线为单频导频的谱线为单根。 3, the timing guide according to claim 1, pilot sequence generating system, characterized in that said discrete spectrum is a single frequency pilot line is single.
4、 根据权利要求1所述的同步导频序列生成系统,其特征在于,所述离散谱线的功率为零的谱线为多根。 4. The guide of claim 1 frequency synchronization sequence generation system as claimed in claim, wherein said discrete power spectrum is zero is a plurality of lines.
5、 根据权利要求1所述的同步导频序列生成系统,其特征在于,所述随机跳频单元用于在每一帧的同步信道中随机改变单频导频的频镨位置,使得单频导频之间的频率间隔大于信道相干带宽。 5. The guide of claim 1 frequency synchronization sequence generation system as claimed in claim, wherein the random frequency hopping means for randomly changing the position of praseodymium single frequency pilot synchronization channel in each frame, such that a single frequency between the pilot frequency interval is greater than the channel coherence bandwidth.
6、 根据权利要求1 - 5中任一项所述的同步导频序列生成系统,其特征在于,所述通信系统为正交频分复用OFDM系统。 5 timing guide as claimed in any one pilot sequence generating system, wherein said communication system is a orthogonal frequency-division multiplexing OFDM system - 6, according to claim 1.
7、 一种通信系统中的同步导频序列生成方法,其特征在于,包括以下A、 生成基带信号序列;B、 将基带信号序列分别乘以不同的系数,使一部分基带信号序列所对应的离散谱线的功率为零,另一部分基带信号序列所对应的离散镨线为单频导频;C、 将步骤B输出的基带信号序列复用为一路数据,并在每一帧的同步信道中随机改变单频导频的频镨位置;D、 根据随机跳频后的数据生成同步导频序列。 7, a communication system a synchronization pilot sequence generating method, characterized by comprising A, to generate a baseband signal sequence; B, the baseband signal sequence are multiplied by different coefficients, so that part of the baseband signal sequence corresponding to discrete line power is zero, the other part of the baseband signal sequence corresponding to the single frequency discrete praseodymium pilot line; C, the baseband signal B output sequence of steps multiplexed into one data, and randomly synchronization channel of each frame frequency change position praseodymium single frequency pilot; D, according to the data generating random hopping synchronization pilot sequence.
8、 根据权利要求7所述的方法,其特征在于,步骤A包括:生成功率为零的离散镨线所对应的基带信号序列;生成所述单频导频的离散语线所对应的基带信号序列。 8. The method of claim 7, wherein the step A comprising: generating a sequence of baseband signal power Pr is zero discrete line corresponds; generating a single frequency pilot signal frequency baseband discrete lines corresponding to the language sequence.
9、 根据权利要求7所述的方法,其特征在于,步骤C包括:在每一帧的同步信道中随机改变单频导频的频谦位置,使得单频导频之间的频率间隔大于信道相干带宽。 9. The method of claim 7, wherein the step C comprising: modest frequency changing random position of the pilot in the single frequency synchronization channel of each frame, so that the frequency interval between the frequency is greater than a single frequency channel guide coherence bandwidth.
10、 根据权利要求7所述的方法,其特征在于,所述离散镨线为单频导频的谱线为单根。 10. The method of claim 7, wherein said single frequency discrete line praseodymium pilot line is single.
11、 根据权利要求7所迷的方法,其特征在于,所述离散语线的功率为零的谱线为多根。 11. The method of claim 7 fans, characterized in that said discrete power spectral zero line is a plurality of language.
12、 根据权利要求7所述的方法,其特征在于,步骤C包括:随机改变单频导频的频谱位置,其中连续的多个帧中的单频导频的频谱间隔是不等的。 12. The method of claim 7, wherein the step C comprises: randomly changing the position of single-frequency spectrum pilot, wherein a plurality of consecutive frames of a single-frequency spectral frequency interval ranging guide.
13、 根据权利要求7所述的方法,其特征在于,步骤C包括:随机改变单频导频的频语位置,其中连续的多个帧中的单频导频的位置为随机跳频分布。 13. The method of claim 7, wherein the step C comprises: randomly changing frequency speech single frequency pilot position, wherein the plurality of successive frames of the pilot single frequency hopping random distribution location.
14、 根据权利要求7-13中任一项所述的方法,其特征在于,所述通信系统为OFDM系统。 14. The method as claimed in any one of claims 7-13, wherein the communication system is an OFDM system.
15、 一种通信系统中的同步导频序列生成系统,包括依次相连的串并转换单元、映射单元、快速傅立叶逆变换IFFT/离散傅立叶逆变换IDFT单元、 并串转换单元;串并转换单元用于将接收的一路数据转换为多路并行数据,映射单元用于将多路并行数据以一定规则映射到各个子载波上,IFFT/IDFT单元用于对映射后的数据执行反傅立叶变换后传送给并串转换单元输出;其特征在于, 该系统还包括:基带信号序列生成单元,用于生成基带信号序列;功率调整单元、,用于将基带信号序列生成单元所生成的基带信号序列分别乘以不同的系数,使一部分基带信号序列所对应的离散谱线的功率为零,另一部分基带信号序列所对应的离散谱线为单频导频;复用单元,将功率调整单元输出的基带信号序列复用为一路数据传送给串并转换单元;随机跳频控制逻辑器,用于 15, in a communication system a synchronization pilot sequence generating system includes a serial parallel conversion unit connected in sequence, a mapping unit, an Inverse Fast Fourier Transform IFFT / IDFT means an inverse discrete Fourier transform, a parallel-serial conversion unit; serial-parallel conversion means with the way to convert the received data into multiple parallel data, parallel data mapping unit configured to multiplex a certain rule to each sub-carrier mapping, IFFT / IDFT unit for transmission to perform inverse Fourier transform on the mapped data serial conversion means output; characterized in that the system further comprises: a baseband signal sequence generating unit configured to generate a baseband signal sequence; power adjusting means ,, for the baseband signal sequence of the baseband signal sequence generating unit generates are multiplied by different coefficients of the discrete spectrum of the power part of the baseband signal sequence corresponding to zero, another portion of the baseband signal sequence corresponding to the discrete spectral lines as single frequency pilot; multiplexing unit, the baseband signal sequence power adjustment unit output multiplexing transmission data into one serial to parallel conversion unit; random hopping control logic for 映射单元发送随机跳频命令,映射单元进一步用于根据所述随机跳频命令在每一帧的同步信道中随机改变单频导频的频谱位置;其中随机跳频控制逻辑器与映射单元连接。 Random hopping mapping unit transmits commands, the mapping unit is further for randomly changing random hopping command single-frequency spectral position of the pilot in each frame based on the synchronization channel; wherein the random hopping control logic connected to the mapping unit.
16、根据权利要求15所述的同步导频序列生成系统,其特征在于,所述基带信号序列生成单元包括:宽带成分生成单元,用于输出所述幅值为零的离散谱线所对应的基带信号序列;窄带成分生成单元,用于输出所述单频导频的离散谱线所对应的基带信号序列。 16, 15 according to the guide frequency synchronization sequence generation system as claimed in claim, characterized in that said baseband signal generation unit sequence comprising: a broadband component generation means for outputting said amplitude zero discrete spectral lines corresponding to the the baseband signal sequence; narrowband component generation unit, a baseband signal sequence of discrete frequency spectrum corresponding to the output of the single frequency pilot.
17、根据权利要求15或16所述的同步导频序列生成系统,其特征在于, 所述通信系统为OFDM系统。 17, according to the timing guide 15 or 16 pilot sequence generation system as claimed in claim, wherein the communication system is an OFDM system.
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Families Citing this family (31)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9756874B2 (en) 2011-07-11 2017-09-12 Proteus Digital Health, Inc. Masticable ingestible product and communication system therefor
US9198608B2 (en) 2005-04-28 2015-12-01 Proteus Digital Health, Inc. Communication system incorporated in a container
US8730031B2 (en) 2005-04-28 2014-05-20 Proteus Digital Health, Inc. Communication system using an implantable device
WO2007028035A2 (en) 2005-09-01 2007-03-08 Proteus Biomedical, Inc. Implantable zero-wire communications system
KR20140018439A (en) 2006-05-02 2014-02-12 프로테우스 디지털 헬스, 인코포레이티드 Patient customized therapeutic regimens
EP2083680B1 (en) 2006-10-25 2016-08-10 Proteus Digital Health, Inc. Controlled activation ingestible identifier
US8718193B2 (en) 2006-11-20 2014-05-06 Proteus Digital Health, Inc. Active signal processing personal health signal receivers
MY165532A (en) 2007-02-01 2018-04-02 Proteus Digital Health Inc Ingestible event marker systems
EP3236524A1 (en) 2007-02-14 2017-10-25 Proteus Digital Health, Inc. In-body power source having high surface area electrode
US8932221B2 (en) 2007-03-09 2015-01-13 Proteus Digital Health, Inc. In-body device having a multi-directional transmitter
US8115618B2 (en) 2007-05-24 2012-02-14 Proteus Biomedical, Inc. RFID antenna for in-body device
WO2009042812A1 (en) 2007-09-25 2009-04-02 Proteus Biomedical, Inc. In-body device with virtual dipole signal amplification
EP2215726B1 (en) * 2007-11-27 2018-01-10 Proteus Digital Health, Inc. Transbody communication systems employing communication channels
US8258962B2 (en) 2008-03-05 2012-09-04 Proteus Biomedical, Inc. Multi-mode communication ingestible event markers and systems, and methods of using the same
CA3039236A1 (en) 2008-07-08 2010-01-14 Proteus Digital Health, Inc. Ingestible event marker data framework
CA2746650A1 (en) 2008-12-11 2010-06-17 Proteus Biomedical, Inc. Evaluation of gastrointestinal function using portable electroviscerography systems and methods of using the same
US9439566B2 (en) 2008-12-15 2016-09-13 Proteus Digital Health, Inc. Re-wearable wireless device
US9659423B2 (en) 2008-12-15 2017-05-23 Proteus Digital Health, Inc. Personal authentication apparatus system and method
TWI503101B (en) 2008-12-15 2015-10-11 Proteus Digital Health Inc Body-associated receiver and method
TWI517050B (en) 2009-11-04 2016-01-11 Proteus Digital Health Inc Supply Chain Management System
JP5841951B2 (en) 2010-02-01 2016-01-13 プロテウス デジタル ヘルス, インコーポレイテッド Data collection system
US9439599B2 (en) 2011-03-11 2016-09-13 Proteus Digital Health, Inc. Wearable personal body associated device with various physical configurations
US20140203950A1 (en) 2011-07-21 2014-07-24 Mark Zdeblick Mobile Communication Device, System, and Method
CN102238116B (en) * 2011-08-02 2014-07-09 北京邮电大学 Pilot frequency sequence generation method and system
US9235683B2 (en) 2011-11-09 2016-01-12 Proteus Digital Health, Inc. Apparatus, system, and method for managing adherence to a regimen
JP6043023B1 (en) 2013-09-20 2016-12-14 プロテウス デジタル ヘルス, インコーポレイテッド Method, device and system for receiving and decoding signals in the presence of noise using slicing and warping
WO2015044722A1 (en) 2013-09-24 2015-04-02 Proteus Digital Health, Inc. Method and apparatus for use with received electromagnetic signal at a frequency not known exactly in advance
US10084880B2 (en) 2013-11-04 2018-09-25 Proteus Digital Health, Inc. Social media networking based on physiologic information
CN104717659B (en) * 2013-12-11 2019-08-30 中兴通讯股份有限公司 A kind of transmission method and device of descending pilot frequency
WO2015112603A1 (en) 2014-01-21 2015-07-30 Proteus Digital Health, Inc. Masticable ingestible product and communication system therefor
US10187121B2 (en) 2016-07-22 2019-01-22 Proteus Digital Health, Inc. Electromagnetic sensing and detection of ingestible event markers

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1466292A (en) 2002-06-07 2004-01-07 三星电子株式会社 OFDM transmitter and method for inserting pilot frequency into OFDM signal
CN1658534A (en) 1999-03-15 2005-08-24 Lg电子株式会社 Pilot sequence for frame synchronization and frame synchronization method and device therefor
CN1980205A (en) 2005-11-29 2007-06-13 华为技术有限公司 Series generating system and method, transmitting and synchronizing method and power regulating system

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1658534A (en) 1999-03-15 2005-08-24 Lg电子株式会社 Pilot sequence for frame synchronization and frame synchronization method and device therefor
CN1466292A (en) 2002-06-07 2004-01-07 三星电子株式会社 OFDM transmitter and method for inserting pilot frequency into OFDM signal
CN1980205A (en) 2005-11-29 2007-06-13 华为技术有限公司 Series generating system and method, transmitting and synchronizing method and power regulating system

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