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Demand-based power and data rate adjustments to a transmitter to optimize channel capacity and power usage with respect to data transmission traffic over a fixed-bandwidth channel
Demand-based power and data rate adjustments to a transmitter to optimize channel capacity and power usage with respect to data transmission traffic over a fixed-bandwidth channel
In a communication system in which a transmitter transmits data over a communication channel of a fixed bandwidth to a receiver, the method according to which the transmit data rate is continuously adjusted to a rate which is substantially equal to a short-term average data rate. The channel capacity and/or other characteristics of the system, is continuously adjusted, through changes in transmit power, symbol rate and modulation format, to a level at which the ratio of received signal energy per bit to noise spectral density (Eb/N0) at the receiver is close to but above its minimum acceptable level, thereby matching the channel capacity and/or other characteristics of the system to the traffic. The system has further attributes which adjust the transmit data rate responsive to conditions involving at least one of data traffic levels, power reserve emergency, thermal load and message priority.
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机译:在其中发送器通过固定带宽的通信信道向接收器发送数据的通信系统中,根据该方法,将发送数据速率连续地调节为基本上等于短期平均数据速率的速率。通过改变发射功率,符号率和调制格式,将系统的信道容量和/或其他特性连续调整到一个水平,在该水平下,每位接收信号能量与噪声频谱密度的比率(E 接收器处的b Sub> / N 0 Sub>)接近但高于其最小可接受水平,从而使信道容量和/或系统的其他特性与流量相匹配。该系统具有进一步的属性,该属性响应于涉及数据业务量水平,功率储备紧急情况,热负荷和消息优先级中的至少一项的条件来调整发射数据速率。
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