间隔符号

The invention discloses a data transmitting method, a device and a system in a time division duplex system, which is used to solve the problem in the prior art that downlink data among adjacent cells interfere to uplink data; the method comprises that: a blanket channel of a whole cell or a high-power transmit channel is mapped to OFDM symbols of a downlink time slot in a transmit frame, a guard interval in the transmit frame and the OFDM symbol on a time domain space OFDM symbols which are not mapped to any of the blank channel of the whole cell and the high-power transmit channel; an uplink control channel is mapped to OFDM symbols of an uplink time slot in the transmit frame, the guard interval and the OFDM symbols for mapping the uplink control channel on the time domain space OFDM symbols which are not mapped to uplink control channel; the OFDM symbols of the transmit frame are transmitted; the invention is adopted to avoid the interference between the downlink data and the uplink data among the adjacent cells.

本发明公开了一种时分双工系统中发送数据的方法、装置及系统，用以解决现有技术中邻近小区间的下行数据对上行数据产生干扰的问题；该方法包括将全小区覆盖信道或大功率发射信道映射到传输帧中下行时隙的OFDM符号上，并且所述传输帧中的保护间隔与所述OFDM符号在时域上间隔未映射全小区覆盖信道和大功率发射信道中任一信道的OFDM符号；将上行控制信道映射到所述传输帧中上行时隙的OFDM符号上，并且所述保护间隔与映射上行控制信道的OFDM符号在时域上间隔未映射上行控制信道的OFDM符号；发送所述传输帧的OFDM符号；采用本发明可以避免相邻小区间的下行数据和上行数据之间的干扰。

Base on the analysis, an improved training symbol with symmetric and repetitive structure is proposed, and the estimate range of the frequency offset is enlarged by increasing the number of repetitive sequence and shortening the interval of repetitive sequence.

在此基础上，提出了一种改进的训练符号结构，即在SC算法重复结构的训练符号中引入共轭对称结构，同时通过增加重复序列的数目，缩小重复序列之间的间隔，进一步扩大基于单个训练符号的频偏估计范围。

The symbol length of digital pulse interval modulation is variable, so there are some difficulties to analyze error performances of Turbo coded DPIM.

数字脉冲间隔调制的符号长度变化不固定，因而分析该调制方式在Turbo码编码下的差错性能存在困难。

Still have among them space mark, the symbol that I suggest to be not inputted with clavier or what character, it is OK that with Css control A label does a small icon to make background, all purpose is will trashy thing eliminate clean.

还有其中的间隔符号，我建议不要用键盘输入的符号或者什么文字，用css控制a标签弄个小图标做背景就可以，一切的目的是将没用的东西剔除干净。

On the other hand, OFDM is very sensitive to carrier frequency offset and frequency spread for the increasing symbol period or the small subcarrier internal, which result in serious intercarrier interference , and the performance of OFDM system is greatly affected.

另一方面，OFDM符号周期相对增加即子载波间隔的减小会使得OFDM系统较单载波通信系统对载波频率偏移或Doppler扩展更加敏感，使子载波之间的干扰增加，影响系统的性能。

2 The sail shall carry the National Letter, National number and the sailboard insignia, if it has one, in accordance with the ISAF Racing Rules of Sailing.

2.6.2 帆上应有国家代码字母及国家数字及船型级别符号，帆号最小尺寸其字母及数字应为：高度230公厘、间隔45公厘

Their simultaneous use of two calendars with astrology arrayed sets of ratios and sequences yet accounted for each day of the year in a way utterly foreign to the European calendar. The number 360 symbolizes space in a 360-degree circle or sphere.

他们同时使用两种历法，是利用一套占星术的比率编排，序列仍然用作一年内每天的计算，对于欧洲历法来说，是一种完全陌生的方式。360个象征符号把圆周或球体间隔成360度。

The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应，而且减少跟风的可能性。