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The effect of DPD bandwidth limitation on EVM for a 28 nm WLAN 802.11ac transmitter

机译:DPD带宽限制对28 nm WLAN 802.11ac发射器EVM的影响

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摘要

Digital predistortion (DPD) performance for an IEEE 802.11ac WLAN transmitter in 28 nm CMOS, using 20 and 80 MHz bandwidth with 256QAM modulation, is analyzed under different bandwidth limitations. Due to band-limited conditions in the transmitter chain, the DPD linearization performance may be reduced. For a minimum transmitter error vector magnitude (EVM) requirement of -32 dB (2.5%) for 256QAM modulation, a reduction in the maximum linear output power of 1.6 dB due to bandwidth limitations in the transmitter chain is estimated using simulations and measurement results.
机译:在不同的带宽限制下,分析了使用20和80 MHz调制的IEEE 802.11ac WLAN发射器的数字预失真(DPD)性能。由于发射器链中的带限量条件,可以减少DPD线性化性能。对于256QAM调制的最小发射器误差矢量幅度(EVM)要求-32dB(2.5 %),使用模拟和测量结果估计由于发射机链中的带宽限制而导致的最大线性输出功率的减小。

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