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- A WiMAX system can provide bandwidth efficiency higher than 2 bps/Hz. WiMAX系统能够实现高于2bps/Hz的频带利用率。
- Compared with PC-OFDM,PC/HC-MCM can dramatically improve the bandwidth efficiency of PC-OFDM system. 同PC-OFDM系统相比,PC/HC-MCM能够大幅度提高系统的带宽效率。
- By this way, no redundant signals are added, and the bandwidth efficiency of OFDM system is further increased. 由于采用这种方法无需加入冗馀信息，故进一步提高了系统的传输效率。
- In order to understand the problem, the limit effect of ICI on the bandwidth efficiency of I-UWB was analyzed. 作者分析了码间干扰对I-UWB频谱效率的限制作用。
- Simulation results show that CPQPSK signal has higher bandwidth efficiency than shaped offset OQPSK(SOQPSK) si. 针对导致传统QPSK信号带宽效率和功率效率低的相位跳变问题,提出了连续相位QPSK,CPQPSK调制。
- Cooperative relaying can combat multi-path fading and shadowing effect in wireless networks to enhance communication quality and bandwidth efficiency. 采用中继传输能够抵抗无线信道的多径衰落，克服阴影效应，从而增强通信质量，提高频谱效率。
- Space-time trellis codes can provide the best tradeoff between bandwidth efficiency, diversity gain, constellation size and trellis complexity. 摘要空时网格编码能在频带利用率、分集增益、调制方式与编码网格图复杂度之间达到最佳的折衷。
- OFDM (Orthogonal Frequency Division Multiplex) technique, on which DRM system is based, features with high bandwidth efficiency and robustness to multi-path channel. DRM系统以OFDM(Orthogonal Frequency Division Multiplex)技术为基础,具有高频带利用率和抗多径干扰等特点。
- In recent years, the bandwidth efficiency of Ultra Narrow Bandwidth (UNB) technologies, represented by Very Minimum Shift Keying (VMSK), has reached near a 100 bps/Hz. 近年来,以甚小移键控调制(VMSK:Very Minimum Shift Keying)为代表的超窄带(UNB:Ultra Narrow Bandwidth)技术的带宽效率已达100bps/Hz。
- Aim at the low data rate and poor bandwidth efficiency of DS-CDMA used in traditional SMA multi-access servings of TDRSS,a substituted scheme adopting MC-CDMA was put forward. 针对传统跟踪与数据中继卫星通信系统(TDRSS)SMA多址业务中单载波CDMA数据传输速率和频带利用率低的缺点,提出采用多载波CDMA(MC-CDMA)进行替代的方案,对MC-CDMA在TDRSS中应用需解决的关键技术问题进行分析并提出相应的对策。
- Study shows that MC-CDMA has completely applicability in TDRSS and has the advantage of high data rate and ideal bandwidth efficiency and can remarkably improve the data transmission performance of TDRSS. 研究表明,MC-CDMA完全适用于TDRSS星上系统,数据传输速率和频带利用率高,对提高TDRSS数据传输性能具有十分重要的应用价值。
- According to the simulation result, the bandwidth efficiency brought by different pemodulation filters and the ISI cause by them are analyzed and compared. Then the system error rate performance is also analyzed in the article. 文中通过仿真结果着重分析和比较了不同的预调滤波器带来的带宽效率和码间干扰后，进一步分析了它们对系统误码性能的影响。
- As a breakthrough in the field of wireless communication, MIMO (Multiple Input Multiple Output) can improve system capacity and bandwidth efficiency without the expense of bandwidth and TX power. 多输入多输出(MIMO)技术是新一代无线通信系统的关键技术之一,它既可以增加传输的可靠性,也可以增加传输的速率。
- Simulation results show that CPQPSK signal has higher bandwidth efficiency than shaped offset OQPSK (SOQPSK) signal under same constraints and has almost the same bit error rate(BER) as the latter. 仿真结果表明CPQPSK的带宽效率在同等情况下要高于SOQPSK，而抗误码性能与后者几乎完全相同。
- Extended Binary Phase Shift Keying (EBPSK) is a kind of bandwidth efficient modulations. 摘要扩展的二元相移键控是一种高效调制技术。
- The proposed algorithm can be used to demodulate high data rate and bandwidth efficient QPSK signal, which is used in Tracking and Data Relay Satellite System (TDRSS). 它可应用于中继卫星通信中高速数传且频带有效QPSK的同步解调。
- Blind equalization without training sequence is a bandwidth efficient way to mitigate the intersymbol interference in the field of underwater acoustic communication. 摘要不需要训练序列的盲均衡技术可以有效地节省水声通信带宽，消除码间干扰，提高水声通信效率和质量。
- We must improve our efficiency as soon as possible. 我们必须尽快地提高工作效率。
- Their labor efficiency is very high. 他们的工作效率很高。
- We were most impressed with/by your efficiency. 你的工作效率很高，我们极为钦佩。
