查询词典 two-base 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。

Acting decisively in firing his two erstwhile colleagues typifies the management style of Mr Liveris, an Australian every bit as plain-spoken as the blokes back home in Darwin.

果断地采取行动裁撤两位老同事体现了利伟诚的管理风格。这位澳大利亚人完全和家乡达尔文人一样说话耿直坦率。

As for this method, the variation of diamond on the same matrix surfaces in the process of drilling was shot continuously, and the wearing mechanism of diamond bit was observed and analyzed microscopically, from which the two new conclusions had been obtained.

该方法通过连续拍摄钻头钻进过程中同一胎体面上的金刚石变化，从微观上观察分析了金刚石钻头的磨损机理，得出了两个新的结论，可供孕镶金刚石钻头的设计和使用参考。

You can store a single number between zero and 4.2 billion, or use the bit-fields to note up to thirty-two yes-no options.

你可以储存一个0倒4.2十亿的数字，或者使用该位区域注释最多32个yes-no选项（在无符号密匙里只有16个）。

Red Cat and Blue Rabbit's cancellation puzzles, but this is a bit difficult, must be more than two can only be eliminated if the final consumer, but all the boxes.

红猫蓝兔的消图游戏，不过这个也有点难度，必须要两个以上才可以消除，如果最后消不过所有的方块。

In a wireless communication apparatus having the interleave apparatus, a data holding part (1021) two-dimensionally arranges and holds bit sequences.

在具备该交织装置的无线通信装置中，数据保持单元(1021)将比特串二维排列并保持。

Things are now beginning to develop into a two-horse race, between Renault and Ferrari, with McLaren still running a little bit behind them and Honda now clearly struggling to keep up.

事情现在开始演变成两只车队的比赛，即雷诺和法拉利之间的较量，而迈凯轮仍然还有些落后，本田无疑也是在竭力的追赶。

Therefore,never reach thousand-mile place without accumulating one-and-two foot;and never form the huge river and sea without pooling a bit of stream.

所以不积累起一步两步，就无法到达千里之外；不汇积细小的溪流，就不能成为江海。

She said that at about 2:30 pm a Chinese man followed a foreign man into the restaurant. As the foreign man took his food into the restaurant to eat and was turning around a table, the man who followed him suddenly attacked him from the front, stealing his bag."The two struggled for a bit, then he took a knife and stabbed the foreigner a few times, grabbed the bag and ran."

据该负责人介绍，下午2时30分左右，一名中国籍男子尾随一名外国男子进入店内，当外国男子捧着食物走到内侧拐角处座位就餐时，尾随男子突然从正面冲上去，抢夺对方的布袋，&两人拉扯了几下，他拿刀连扎了外国人几下，拽着包就跑。&

Two of my colleagues on the trip—Senator Evan Bayh of Indiana and Congressman Harold Ford, Jr. of Tennessee—had made the trip before, and they warned me that the landings in Baghdad could be a bit uncomfortable: To evade potential hostile fire, military flights in and out of Iraq's capital city engaged in a series of sometimes stomach-turning maneuvers.

两名同事（印地安那州参议员埃文和田纳西州国会议员小哈罗德）与我同行，他们以前曾经去过伊拉克，提醒我说在巴格达降落可能不会太舒服：为了避免可能的敌方射击，军事飞机进出伊拉克的首都有时需要进行一系列倒胃口的飞行动作。

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。