You can see that approximately no time is spent executing code in user space, so gprof will not really be useful here.
我们可以看出几乎没有多少时间被花费在执行用户空间的代码上，因此gprof在此处不会非常有用。
Little did I know 30 years later, as an embedded firmware engineer, I would still spend much of my time trying to squeeze more code and data into a smaller address space.
没想到30年后，作为嵌入式固件工程师，我还一直花费大量的时间试图将更多的代码和数据挤入较小的地址空间。
This saves disk space and makes it more likely that you correctly spell the [role] in code, which invariably becomes necessary over time.
这将节省磁盘空间，而且便于您正确拼写代码中的[role]，随着时间的推移，这将成为必需的。
The traditional differential space-time block code (DSTBC) suffers from the signal constellation expansion for QPSK modulation.
传统的差分空时分组编码(DSTBC)在QPSK调制时存在着信号星座扩展。
This text establishes a model of space-time block code system at first, and also introduces the theory of maximum likelihood estimate.
文章首先建立了空时分组编码的系统模型，并且介绍了最大似然估计的理论。
During the compiling, it is of importance to have code optimization reduce the operating time and loading space of target code.
编译过程中，代码优化能减少目标代码的运行时间和存储空间，具有重要作用。
The main ideal of this dissertation can be expressed as follows:Firstly, the improvement of the trace criteria (TC) for space-time trellis code (STTC) is studied.
本文的主要研究成果总结如下：首先研究了空时格码（STTC）迹设计准则的改进问题。
The application of this algorithm makes TTA compiler so many advantages, such as the quality of code obtained is high, time and space complexity is low, and implementation is easy.
线性扫描算法的应用使TTA编译器具有生成目标代码质量高、算法的时间和空间复杂度低、易于实现等优点。
Finally, the performance merit of TCMST block code is confirmed by Monte Carlo simulations and compared with other space-time block codes.
给出了TCMST块码的网格球解码算法，并对TCMST块码的性能进行了仿真，与其他空时块码做了比较，证实了TCMST块码的性能优越性。
To combine multilevel code (MLC) with differential space-time modulation (DSTM), a new scheme based on an multilevel low-density parity-check (LDPC) code with iterative decoding is proposed.
提出一种新的结合多级编码和差分空时调制的联合编码调制方案。
Space-time trellis code combining space diversity with code and modulation, can improve efficiency and reliability of communication system in wireless channel efficiently.
发射端分集、编码和调制结合空时格码，可以有效地提高信号在无线衰落信道中传输的有效性和可靠性；
And its hardware circuit and software programming are simple and convenient, so it can economize program code space and CPU running time. It is a sort of standard of serial bus interface used widely.
其硬件电路及软件编程简单、方便，可节省程序代码空间和CPU运行时间，是一种使用广泛的串行总线接口标准。
We propose an adaptive decoding algorithm for space time trellis code (STTC) used in the TDMA downlink.
本文提出一种针对TDMA下行链路的空时格形码自适应解码算法。
The problem of adaptive decoding of space time trellis code (STTC) on the mobile wireless channels is considered in this paper.
本文探讨了无线移动信道中空时格形码的一种自适应解码技术。
Space- time block codes are code technologies which provide a new paradigm for transmitting over Rayleigh fading channels using multiple antennas.
空时编码是最近提出的使用多个天线应用于瑞利衰落信道的编码技术。
Compared with the full rank space-time trellis code (FR-STTC) with the same transmission rate, it can provide a better performance and a lower realization complexity.
与同速率的满秩网格空时码相比，它能获得更好的误码性能，并且实现简单。
Just as different automobiles can park in a parking space at different times, the calling code can pass a different argument to the same parameter every time that it calls the procedure.
就像一个停车位可以在不同时间停放不同的汽车一样，调用代码在每次调用过程时可以将不同的实参传递给同一个形参。
The results of simulation show that space-time block code based on MIMO-OFDM is a highly effective technique against the frequency-selective random fading.
仿真结果表明，将空时编码技术与M IMO-OFDM技术相结合能有效地抵抗频率选择性随机衰落。
Based on OFDM system, a novel space-frequency-time code which combined trellis-coded modulation with differential space-time block code was proposed.
基于OFDM(正交频分复用)系统，提出了一种新的空频时三维编码，将网格编码调制和差分空时分组码进行组合链接设计。
In this paper, after introducing MIMO information theory about sp ace time code, three kinds of space time code are compared and analyzed systematically.
在介绍空时码的MIMO信息论基础上，系统地对三类空时码进行了分析比较。
In the other code, the Nodal Green's Function Method was used to solve space-time dependent neutron diffusion equation.
在另一个程序中，用节块格林函数方法解时-空中子动力学方程。
Space-time code indicates a new idea of providing high transmission rate in wireless communication systems and has recently received considerable attention.
空时码的提出为解决无线通信系统中的传输速率问题提供了一条新思路，目前已经成为通信研究的一个热点。
Differential unitary space-time code(DUSTC) keeps good performance in rapidly fading channels when neither the transmitter nor the receiver knows the channel state information.
差分酉空时码不需要任何信道状态信息，在通信终端处于高速移动环境下的快变衰落信道中仍能保持较好的性能。
For the OFDM system, a scheme of combining space-time code with the adaptive power control technology is proposed with simulation results, which increases the diversity gain and the adaptive gain.
对OFDM系统提出将空时编码与自适应功率控制技术相结合，给出了仿真结果，提高了分集增益和自适应增益。
The performance analysis of the transmitted diversity system that adopts space-time code is a hot spot in research cycle.
采用空时编码的发射分集系统的性能分析是当前移动通信研究领域的热点问题。
In this paper, we mainly compare the performance of the two space-time codes in many aspects, such as design criterion, transmission rate, diversity gain, code gain and arithmetic complexity etc.
在本文中，本文对这两种编码方式在设计准则、传输速率、分集增益、编码增益和算法复杂性等方面进行了较为详尽的比较研究。
This paper analyzed the impact of fading correlation on the noncoherent unitary space-time code, deduced the pair-wise error probability(PWEP) and Chernoff bound under fading correlation.
介绍了空时码在频率非选择性慢衰落信道下各种设计准则的推导过程，并对几种现有空时码进行了性能分析和比较。
The first-event error probability of STC is evaluated, and a new hybrid design criterion of space-time code for time-varying fading channels is proposed based on that probability.
考察了空时码的首事件差错概率，并基于首事件差错概率提出一种新的用于时变衰落信道的空时码混合设计准则。
The first-event error probability of STC is evaluated, and a new hybrid design criterion of space-time code for time-varying fading channels is proposed based on that probability.
考察了空时码的首事件差错概率，并基于首事件差错概率提出一种新的用于时变衰落信道的空时码混合设计准则。
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