查询词典 cub pilot

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。

Apart from the fun and excitement of Cub Scout activities, the Cub Scout Promise, the Law of the Pack, and the Cub Scout sign, handshake, motto, and salute all teach good citizenship and contribute to a boy's sense of belonging.

除了娱乐和激动外，儿童童子军承诺，遵守童子军的各项规定，握手，信念，致敬，所有这些都为了教育孩子良好的公民精神和归属感。

Armstrong August 5, 1930 Wa Pake was born in Ohio in the United States reached the city of his childhood learning seriously, when the ideal is to grow the pilot, 14-year-old began to receive flight training, 16-year-old pilot certificate to obtain ,1949-1952, he became the Navy The youngest pilots. Armstrong in July 1953 expiry of the service backward Pardew Aviation University of Technology, after graduating from Edwards Air Force Base in any test pilot, later took part in the X-15 rocket plane's flight plan had been 6 flight, highest altitude reached 60,000 meters. In September 1962, a rigorous selection process, Armstrong became the first civilian from the pilot in the selection of one of the 2 astronauts, space industry and from forged a bond.

阿姆斯特朗1930年8月5日生于美国俄亥俄州瓦帕科内达市，他从小学习认真，理想是长大当飞行员，14岁即开始接受飞行训练，16岁获得飞行员证书，1949—1952年成为海军中最年轻的飞行员。1953年7月阿姆斯特朗服役期满后进帕杜大学学习航空技术，毕业后在爱德华兹空军基地任试飞员，后参加过X—15火箭飞机的飞行计划，曾进行过6次试飞，最高飞行高度达到6万米。1962年9月，经过严格挑选，阿姆斯特朗成为首批从文职飞行员中征选的2名宇航员之一，从此与航天事业结下了不解之缘。

The invention discloses a multi-cell pilot frequency distribution method applied in an orthogonal frequency-division multiplexing system, which comprises the following steps: generating at least two different original frequency hopping sequences according to a predetermined pilot frequency domain; generating a combined frequency hopping sequence (having length greater than that of the original frequency hopping sequences) from at least two different original frequency hopping sequences; generating different pilot frequency structures satisfying collision threshold requirements based on the combined frequency hopping sequence; and distributing the generated pilot frequency structures to each cell.

本发明公开了一种多小区导频分配的方法，用于正交频分复用系统，按照预定的导频频域间隔生成至少两种不同的原始跳频序列；将至少两种不同的所述原始跳频序列生成组合跳频序列，所述组合跳频序列的长度大于所述原始跳频序列的长度；基于所述组合跳频序列生成满足碰撞门限要求的不同导频结构；将所述生成的导频结构分配给各小区。

All the jobs including the assignment of pilot, vehicle driver, pilot boat task, the pilot charge, the assess of pilots, vehicle drivers, pilot boats are completed manually at present.

如何架构该系统，尤其是其J2EE框架如何实现，以及在整个框架中，应用程序的可重用性是本论文主要讨论的问题。

Cub Scouting helps parents and sons grow closer, and your involvement as a parent of a Cub Scout is vital.

童子军帮助孩子们和你建立更密切的关系，所以父母的参与对此至关重要。

The Golden Bauhinia Award is the highest award of the Cub Scout Section. It is in recognition of the Cub Scouts' achievement in the areas of

金紫荆奖章是颁予幼童军之最高奖章，以表扬幼童军在户外挑战、历险挑战、分享经验及领袖才能各方面的成就。

The aim of Cub Scout Section is to encourage the physical, mental and spiritual development of children of Cub Scout age, as an integral part of an overall plan of continuous training throughout the age ranges of the Movement.

旨在促进幼童军年龄之少年身心及精神之陶冶与启发，乃贯彻整个童军运动年限的连续性训练计划的一部份。

Cub-carrying also occurs among some other myrmecophagous mammals; therefore one explanation is that cub-carrying is necessitated by myrmecophagy since myrmecophagy entails a low metabolic rate and high energy expenditure in walking between food patches.

幼崽携带行为在其他食昆虫的哺乳动物中也存在；因此，一个解释是幼崽携带行为是食昆虫类哺乳动物所必须的，因为食昆虫类哺乳动物通常新陈代谢率很低而在不同的食物地之间穿行的消耗很高。

Two molecular forms of Xenopus hatching enzyme, 60kD and 40kD molecules, was obtained during preparation and purification. Both of them were verified as the hatching enzyme molecules, using anti GST UVS.2 antibody as the probe. 60kD molecule was digested or autodigested easily into 40kD molecule during purification. It was indicated that 40kD molecule was probably derived from 60kD molecule with its two CUB repeats lost, and the two CUB repeats may play an important role in recognizing and/or modifying of the molecular structure of vitelline envelope.

在分离纯化非洲爪蟾孵化酶时，得到了60kD和40kD两种分子，用孵化酶的特异性抗GST-UVS.2抗体进行Western杂交的结果证明二者均为孵化酶分子。60kD分子很不稳定，在纯化过程中极易降解，40kD分子可能是由60kD分子经过降解或自身降解丢失了两个CUB重复区而形成的，而CUB重复区很可能在对受精膜分子结构的修饰或改造中具有重要作用。

A historical region of southwest France between the Pyrenees and the Garonne River. The duchy of Aquitaine was joined with France after the marriage of Eleanor of Aquitaine to King Louis VII in1137, but its possession was disputed after her subsequent marriage to Henry II of England.

阿基坦法国西南部一个历史地区，位于比利牛斯山和加隆河之间，在1137年阿基坦的埃莉诺与国王路易斯七世结婚之后阿基坦公国加入法国，但当她再嫁英国亨利二世后，其归属权便受到争议

There are moments when I look at the smiling , happy faces of my expectant staff and wonder how they will cope when confronted by an outraged housemaster along with an unrepentant and recalcitrant bleached blond teenager in 18 years ' time .

有时候，我看着那些满怀期待的员工微笑，幸福的脸，想着当他们遇到一位愤怒的宿舍管理员和一位不知悔改，叛逆，而且将头发染成白色的18岁少年时，他们会如何处理。