查询词典 do one's bit

The paper investigates both block-type pilot linear minimum mean square error algorithm and IEEE802.16 OFDM channel estimation analysis. Simulation results confirm the block-type pilot structure is more suitable for IEEE802.16 system. An optimal pilot setting algorithm, based on space frequency domain, is explored and the pilot chart is presented. The proposed algorithm finds its application in MIMO-OFDM. Simulation results show the algorithm presents a good approximation to the perfect channel state information curve, with about 2dB difference in SNR. The simulation results also demonstrate the algorithm achieves fairly high stability in the environment of fast fading, performance of the proposed algorithm is better that of pilot training channel estimation.3. Taking into account the characteristics of IEEE802.16 OFDM system, OFDM system simulation platform is constructed in Matlab, exploiting simulink as a tool. OFDM modulation and demodulation simulation system are configured on LabVIEW platform. All the system signal processing is simulated, including defining system parameters, designing modulation model, and verifying all the proposed algorithms under different environments, such as white Gaussian noise, multi-path fading, with or without guard interval etc. Bit error performance is evaluated. The research provides valid theoretical basis for practical OFDM system performance evaluation.4. Taking advantage of software radio, the paper designs a hardware platform with both 256-IFFT/FFT and 512-IFFT/FFT OFDM schemes co-existing in one platform. You can predetermine one from the two schemes to carry out almost the same model function with different system performance and parameter setting.5. Referring to IEEE802.16 standard, the paper proposes a design method for generating signals and frames suitable for laboratory investigations implemented in laboratory environment.6. Based on 6701evm digital evaluation card, combined with analogy front-end, the paper designs a DSP software model to deal with baseband signal processing. An overall OFDM scheme, with modulation and demodulation function, is accomplished.

讨论分析了MIMO-OFDM中一种基于空频域的最优导频设置算法，给出了导频图案，通过仿真实验表明，该算法与理想的信道状态信息曲线非常接近，信噪比差距约在2dB左右，并且在快衰落条件下具有较好的稳定性，其性能要优于基于前导训练的信道估计方法。3、根据IEEE802.16OFDM系统特点，论文分别在Matlab中应用Simulink工具构建OFDM系统仿真平台、在LabVIEW平台上实现了OFDM调制解调仿真系统，模拟了整个系统的信号流程，进行了OFDM仿真系统参数的选择和调制模块的仿真设计、论证各算法性能，并根据各种不同的条件：例如高斯噪声、多径衰落、有无保护间隔等，对系统的误码特性进行了评估，为正确评价实际OFDM系统的性能提供了有效的理论依据。4、论文以软件无线电思想作为指导，提出了以256点IFFT／FFT为核心和以512点IFFT／FFT为核心的两种OFDM算法模式并存于同一个硬件平台、且可预选的方案，它们在参数选取和性能指标上有所差异，均实现了相似的模块和功能。5、论文参考IEEE 802.16无线网络标准的参数设置，针对本设计系统的应用环境和系统硬件的性能速率，提出了一种应用于实验室环境的信号结构、帧格式等参数设计。6、论文基于TI公司的6701evm数字评估板卡，结合模拟前端搭建数字中频平台，设计了基带处理的DSP软件模块并进行系统调试，基本实现了一套完整的OFDM调制解调方案。

While the housing system reform will be part of the public housing in accordance with the principle of voluntary sold to individuals, but public housing still accounts for a significant proportion : two urban property management is provided by a State-subsidized low-rent housing welfare, the early 1990s, only one square metre a bit of money, in 1995 a square metre 0.60 billion, Currently about one square metre two yuan money.

虽然推行住房制度改革后将一部分公有住房按照自愿的原则出售给个人，但公有住房仍然占相当的比例：二是城市房地产管理部门提供的是一种国家补贴的低房租的福利性住房，90年代初，一平方米仅几分钱，1995年一平方米0.60元，目前一平方米大约两元钱。

"It's a bit hard to lose one day when you have one week only, and there could also be more delays," Ms. Belbo told The A.P.

&这就有点难失去总有一天，当你有一个星期，可能也会更加延误，Belbo告诉美联社Ms。&

Write down so that once a colleague wants me to help him send bill to the client, I took a piece of bill that wrote a number to do not have affix one's seal however only unexpectedly in haste, the client also did not look carefully at that time, later the following day after the client made a telephone call, the work in the same placing's furious resumptive bill, bang ground take the table in me, that appearance, wanted to eat me it seems that, my this all one's life does not forget that his word, he says, bother you sober place is good, you how so stupid, what can you do, do you have a meal is VIP fed?!

记得有一次一个同事要我帮他给客户送发票，匆忙之中我竟拿了一张只填了数字却没有盖章的发票，客户当时也没仔细看，后来第二天客户打了电话之后，同事气冲冲的取回发票，"啪"地一下拍在我的桌子上，那样子，似乎要吃了我，他的那句话我这辈子都忘不了，他说，麻烦你清醒点好不好，你怎么这么笨啊，你会做什么啊，你是不是吃饭都要人喂啊？！

In this paper,the following assignment problem is considered:there are persons to be assigned to do jobs,where,every person who is assigned to do one job,meanwhile,every job demands one person to do;then,this assignment problem is called standard assignment problem,furthermore,it is called general assignment problem.

考虑了指派问题：有m项工作和n个人。若m与n是相同的，并且每一项工作只能由一个人来做；同时，每一个人只能做一项工作；符合这一条件的指派问题称为标准指派问题；若m与n不相同，则称为非标准指派问题。

One summer he managed to get a job in a butcher's shop during the daytime ,and another in a hospital at night.In the shop he learned to cut meat up quite nicely,so the butcher often left him to do all the serving while he went into a room behind the shop to do the accounts.In the hospital,on the other hand ,he was, of course, allowed to do only the simplest jobs ,like helping to lift people and to carry them from one part of the hospital to another.Both at the butcher's and at the hospital,Tom had to wear white clothes.

有一年夏天，他设法找到工作，在一个肉店白天，而另外一家医院 night.in在店内，他学会了分割肉起来相当漂亮，所以常常屠夫给他留下奋起直追在职的，而他走进一个房间，后面的店做accounts.in医院，另一方面他，当然是可以做的只是最简单的工作，喜欢帮助人解除和携带，从其中的一部分医院another.both在屠夫的，在医院，汤姆不得不穿白色上衣。

To perform an action 做,干 do one's duty do one's homework do sth.

她两年前和丈夫离婚了。

Do one's utmost to + V = do one's best 例句:We should do our utmost to achieve our goal in life.

我们应尽全力去达成我们的人生目标

Do one's utmost to + V = do one's best 例句: should do our utmost to achieve our goal in life.

我们应尽全力去达成我们的人 We 生目标。

Buffett says it's hard to tell if individual drug companies will do well, but that the group should do well over time."We do not pick one-by-one" when it comes to drug companies.

巴菲特表示如果个别的制药公司都经营地不错，的确很难区别，只能看过去整个表现的如何，当碰到制药类公司时，"我们不去一个个挑选"

Diabetes is a social disease that affects several million people worldwide.

糖尿病是一个社会性疾病，全世界有数百万人罹患此病。

I'll call you on Friday to see if we can reschedule our luncheon meeting at your convenience.

我星期五会给您打电话在您方便的时候我们重新安排我们的午餐约会。