需要研究更加有效的无线资源分配及管理策略，以便在有限的带宽上达到更高频谱效率、更高的发射功率利用率以及更好的系统性能。
A more efficient radio resource allocation and management scheme should be proved to transmit with higher spectrum and power efficiency and higher system performance.
通过子孔径方法，可以有效降低数据率及雷达发射峰值功率，并可解决多普勒中心频率的时变问题。
With the subaperture method, data rate and radar transmit peak power can be effectively reduced, the time variant of Doppler center frequency can be resolved.
结果表明，在接收天线数目多于发射天线数目的情况下，该文提出的功率平衡方法可以有效降低多天线系统接收端的BER值。
Simulation results indicate that power balancing can decrease BER at receiver when the number of receiver antennas is greater than that of transmitter.
所述方法包括：确定功率加权的集合，有效地量化功率加权，并且向发射设备提供功率加权的集合。
The method comprises determining a set of power weightings, efficiently quantizing the power weightings, and providing the set of power weightings the transmitting device.
基于子载波边际效用，提出了一种针对实时业务的资源优化分配算法，在满足其传输速率和误比特率的前提下，有效地降低了系统所需要的发射功率。
After that, a resource optimization method for real-time traffics is proposed, which minimizes the required transmit power while guaranteeing the QoS requirement of real-time traffics.
与通常晶体管相比，FFJ的有效发射极面积对基极面积之比值提高2～3倍，输出功率-阻抗乘积提高5～10倍。
The ratio of effectual emitter area to base area of a FFJ is 2-3 times greater than a usual transistor and the output power-impedance product is 5-10 times greater.
介绍了一种采用自适应技术的开关型稳压电源，对电视发射机大功率发射管的冷态灯丝平滑上电压，有效提高了发射管的使用寿命。
The switch mode regulated power supply using self - adjusting technique is introduced. In TV transmitter, it is used to the large power transmit-ting tubes with variable voltage for cold filament.
介绍了一种采用自适应技术的开关型稳压电源，对电视发射机大功率发射管的冷态灯丝平滑上电压，有效提高了发射管的使用寿命。
The switch mode regulated power supply using self - adjusting technique is introduced. In TV transmitter, it is used to the large power transmit-ting tubes with variable voltage for cold filament.
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