这需要通过信道估计获得信道状态信息。
It needs channel state information, which is obtained through channel estimation.
当直传路径信道状态最佳时系统不需要利用中继进行传输。
System does not need relay for transmission when the forward pass path channel is in the best state.
提出了基于分组等待时间和信道状态的动态限定轮询多址协议。
Dynamic limited polling multiple access protocol based on waiting time of packets and channel state is proposed.
因此，如何获得准确的MIMO信道状态信息就成为一个关键问题。
Therefore, how to get the MIMO channel information correctly becomes a crucial problem.
本文提出一种收发端均不知道信道状态信息情况下发射分集差分检测新方法。
This paper presents a new differential detection scheme for transmit diversity, when neither the transmitter nor the receiver has the channel state information.
在维特比译码器译码时，应用信道状态信息(CSI)，可以明显提高系统性能。
The performance can be improved greatly by using the channel state information (CSI) in Viterbi decoder.
所述权重值基于所述信号的通信信道状态和传输模式确定，所述权重值是频率的函数。
The weighting values are determined as a function of frequency based upon a state of a communication channel and the transmission mode of the signal.
已知信道状态信息，自适应参数可以被计算，并且可以被编码的输入符号的结构设计中。
Known of channel state information, the adaptive parameter can be calculated, and the input symbols can be coded in the designed structure.
本文所提出的算法不仅具有较小的控制协议开销，而且对信道状态的变化具有自适应能力。
The proposed algorithm not only has lithe overhead but also ADAPTS to the changes of channel state.
对于多发单收天线(MISO)通信系统，考虑发射端信道状态信息的差错(ECSI)。
For a multiple input single output (MISO) communications system, the presence of the erroneous channel state information (ECSI) must be taken into consideration.
通过利用编码中的旋转不变性，数据融合点无需了解信道状态信息(CSI)即可直接解码。
By elegantly exploiting the rotational invariance property of the coding technology, a direct decoding algorithm without knowing channels state information (CSI) is derived in data gathering node.
与一比特信道状态信息回馈的自适应OFDM比较，自适应SC-FDE系统误码性能更好。
The performance of BER of the proposed SC-FDE system overcomes adaptive OFDM system with one bit per subcarrier CSI feedback in the same conditions.
该方法利用DFT迭代算法来重构虚载波的频域信道状态信息，通过时域滤波方法来抑制噪声。
The channel status information was reconstructed by the new algorithm according to a DFT iterative algorithm. Then the channel noise was suppressed by time domain filter methods.
通过对信道状态信息进行判断，利用贪婪算法将用户子载波分配的比特取整，以实现系统功率最小化。
Then, the bit was rounded by the greedy algorithm with the channel state information judgment, to obtain the minimized transmission power of the system.
相比原有的帐篷映射，多帐篷映射具有诸如能满足不同用户需求的灵活的数据速率，对信道状态的适应性等优点。
We find that compared to original tent-map, multi-tent map has some advantages such as flexibility of data rate to satisfy different users' needs and adaptability to channel status.
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。
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.
然而，在低信噪比区间，且已知信道状态信息时利用自适应注水功率分配算法，信道相关性对信道容量具有提升作用。
However, when the channel information at the transmitter is known and the self-adaptive water-filling power allocation algorithm is used, the channel correlation may lead to higher channel capacity.
本文研究了低回馈信道状态信息的自适应OFDM和SC - FDE系统，即利用有限的信道状态信息实现自适应传输。
This thesis focuses on adaptive OFDM and adaptive SC-FDE with low feedback channel state information (CSI), that is, how to carry out adaptive transmission by using limited CSI.
利用物理层的信道状态信息，该算法将物理层（PHY）的子载波分配同数据链路层（DLL）的数据包业务调度结合起来。
This algorithm combined sub-carrier allocation in the physical(PHY) layer with traffic scheduling at the data link layer (DLL) by employing the channel state information.
该算法在给定信道状态模型和存在信道噪声的情况下，可以有效地提高矢量量化器的性能，实现了信道最优矢量量化器的设计。
The evolutionary algorithm is introduced into the design of COVQ to achieve a significant improvement of VQ performance for a given noisy channel status model.
合理的有线链接，自适应传输只是慢的基础上完善的信道状态信息(CSI)在无线系统，可以合理的信道衰落时，才足够缓慢。
Albeit reasonable for wireline links, adaptive transmissions based on perfect channel state information (CSI) in wireless systems can be justified only when the channel fading is sufficiently slow.
深入研究了数字电视地面广播COFDM解调方案中的解映射软判决技术，提出了适用于该系统的信道状态信息CSI提取方法。
This paper investigates the soft decision of de-mapping technique in COFDM de-modulation scheme. It proposes a new method suitable for the scheme for extracting CSI from communication channel.
但由于其符号映射和检测在时域完成，因此在SC -FDE系统中利用信道状态信息来完成自适应调制，并不像OFDM那样直接。
But SC-FDE cannot finish adaptive modulation utilizing CSI directly like OFDM due to it has to make symbol mapping and detecting in time domain.
采用该算法，在给定信道状态模型和信道噪声情况下，可有效地提高矢量量化器的性能，仿真实验结果表明该算法可获得比传统算法更优的性能增益。
The algorithm achieves a significant improvement of COVQ performance for a given noisy channel status model over other conventional VQ design methods, as confirmed by experimental results.
本文在已知信道状态信息的前提下，将MIMO和OFDM技术相结合，提出了一种新的MIMO - OFDM系统的功率分配和自适应调制方法。
In this paper, a novel power allocation and adaptive modulation method is proposed on the basis of the combination of MIMO and OFDM technology.
针对MIMO空分复用系统中利用信道状态信息自适应选择最佳预编码方案能有效提高系统性能，提出了一种基于有限比特反馈的预编码联合优化算法。
In MIMO spatial multiplexing system, channel state information(CSI) is very useful for adaptive selection of the optimal precoding schemes which can enhance system performance effectively.
为了解决在未来无线通信系统中对信道状态信息（CSI）的准确预测问题，分析了CSI与静态环境参数的关系，提出一种基于环境辅助静态参数的参数化信道预测方法。
The relationship between the channel state information (CSI) and the static channel parameters was analyzed to develop a parametric predictor on the basis of auxiliary environmental static parameters.
这样，当试图使用rdch读取信道时，它将会一直阻塞，直到状态可用为止，只有在这时，传输才会完成。
Thus, when you try to read the channel using RDCH, it will block until the status is available, at which point the transfer will be complete.
当一个READY状态的MS使用了DRX, DRX将在为下行数据传递分配数据包信道的时候被考虑进去。
When a GPRS MS in READY state USES DRX, DRX has to be considered when assigning a packet data channel for downlink transfer.
基于一定的解码状态，声码器通过最小均方误差（MMSE）估计的方法估计最优参数，充分降低信道误码对重建语音质量的影响。
The minimum mean square error (MMSE) is computed for each decoding state to estimate optimal parameters and to reduce the influence of the bit error.
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