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A new time and frequency synchronization method based on frequency domain correlation for an Orthogonal Frequency Division Multiplexing system is presented.

摘要该文根据频域相关的原理，提出了一种新的用于无线移动信道下的正交频分复用系统的时频同步算法。

Then the design and implementation of the M-ary orthogonal spread spectrum system are discussed in detail.

本系统设计方案中包含了同步支路和数据传输支路两个支路。

Sequence above, the orthogonal frequency division multiplexing system software simulation, a certain reference value.

序以上内容，正交频分复用系统的软件仿真，有一定的参考价值。

Methods of reducing the Peak-to-Average-Power Ratio of the Orthogonal Frequency Dixision Multiplexing system have their advantages and disadvantages.

在降低OFDM系统峰均比的众多方法中，均有其优缺点。

The multiple antenna Orthogonal Frequency Division Multiplexing system model is analyzed in this paper.

摘要该文首先分析了多天线发射和接收的OFDM系统模型。

A new orthogonal system of generalized Legendre rational functions is introduced.

介绍了一类新的广义勒让德有理正交函数系。

In this paper we discuss a block coding scheme for reduction of peak-to-average power ratio of an orthogonal frequency division multiplexing system.

讨论了一种降低正交频分复用系统峰均比的分组编码方法。

By analyzing the receiving performance of Orthogonal Frequency Division Multiplex system, frequency offset and the timing of system are studied.

通过分析现有OFDM系统接收性能，对影响OFDM系统性能的频偏和系统定时等因素进行了研究。

With this concept, a comparison of transmission efficiency between the interested system and traditional orthogonal system can be drawn.

引入ML解调下的必要带宽概念，将所考察系统的传输效率与传统正交系统进行比较。

The optimal power allocation strategy of cognitive orthogonal frequency division multiplexing system is studied.

研究了认知正交频分复用系统的容量极限及最优功率分配策略。

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。