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As depicted in Fig 1 VSWR variation influences the gain output compression power
VSWR变化影响增益和输出压缩功率,增加设计挑战和功耗。
16波束成形元件,20-dBm峰值功率,30%效率
VSWR功率放大器功耗预算EVM波束成形
▸创新点1:VSWR弹性PA设计减少过度设计(电路创新):通过设计对VSWR变化具有弹性的功率放大器(PA),避免了传统设计中为应对VSWR变化而过度设计PA的需求,从而降低了整体功耗。
▸创新点2:功耗预算优化方法(系统创新):提出了一种基于VSWR变化的功耗预算优化方法,通过计算不同VSWR条件下的峰值功率需求,优化PA的平均输出功率和效率,显著降低了总功耗。
▸创新点3:EVM预算对总功耗的影响分析(系统创新):详细分析了误差矢量幅度(EVM)预算对总功耗的影响,通过量化EVM各组成部分的贡献,优化了发射链路的功耗预算,提升了系统能效。
▸创新点4:高效PA架构优化功耗(电路创新):结合高效PA架构(如Class-B),进一步优化了功耗预算,通过提高PA效率,减少了系统总功耗,提升了整体性能。
Abstract
y-dependent VSWR leads to gain, power, and EVM
deviation over frequency within the modulation bandwidth.
This imposes many design challenges through the link and
increases total power consumption. For instance, the PA must
deliver an average output power (PA VG) to support the specified
EIRP. Hence, the required peak power (P Peak) in the presence
of VSWR can be calculated as
PPeak = PA VG+ PAPR + 1P (1)
where 1P represents the difference between the wc and
50- peak power ( PPeak-wc − PPeak-50