name: SEM
full_form: Spectrum Emission Mask
context: Investigations were done at f=3450MHz using the parameters given in the following table. Table 8.1.1: Measurement parameters Each Pi/2 BPSK waveform was filtered using a 3-tap filter given in table 1. This filter was selected to give waveforms with PAPRs around 2dB which is was thought to be a good compromise between achieving higher output power and limiting excessive filtering of the signal. For each start RB/LCRB combination the PA output was analyzed for IBE, EVM, ACLR, SEM and output power. The table below gives the measured results based on one PA sample. The increase in output power for various pi/2 BPSK waveforms above the PC2 MPR0 power level is given along with the SEM and IBE margins. The pi/2 BPSK output power is constrained by practical implementation considerations. Table 8.1.2: Measured PA results The IBE, EVM, ACLR and SEM were all seen to pass with sufficient margin for these waveforms. Observation 1: Measurements on a PC2 PA revealed that Pi/2 BPSK waveforms can
description: Spectrum Emission Mask (SEM) is a critical network attribute used to measure the power of emissions outside the designated frequency band. It ensures compliance with regulatory requirements and minimizes interference.
explanation: SEM is described as a measurable attribute used to evaluate network performance, specifically focusing on controlling emissions within legal limits.
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