HP 5989-0130EN free download

File name 5989-0130EN.pdf

Performing Bit Error Rate Measurements with ADS and Baseband Studio Streaming Connected Solutions Application Bulletin 1476-5 ESG signal generator DUT 896XX VSA Baseband post-processing in ADS receiver for Coded BER .sdf file Baseband Studio Streaming file ADS Coded BER Result ADS signal source Glacier Sim. signal source ADS receiver Introduction Verifying Bit Error Rate (BER) and Block Error Rate (BLER) Another challenge is that RF engineers designing RF performance can present real challenges to RF engineers. receivers may not have access to the baseband func- Two major factors should be considered: (1) the number tionality required to perform coded BER measurements, of bits required to produce a statistically meaningful BER/ which can present a barrier to verifying coded BER - a key BLER result, and (2) the baseband functionality required to receiver design specification with today's digital communi- verify coded BER/BLER. cations signal formats. Arbitrary waveform generator (Arb) based solutions allow The Connected Solutions application described in this waveforms to be downloaded from simulation to the signal note can help in verifying RF BER performance when a generator Arb for BER/BLER testing, but are limited by the large number of data bits are required to achieve a statis- Arb depth of the signal generator. Depending on the appli- tically meaningful BER result. cation, this may or may not be sufficient. Concept A conceptual flow diagram is shown on page 1. The ADS sim- used to post-process the data to compute BER or PER. The ulation signal can be stored to a Baseband Studio Streaming 89601 VSA software with option 105 is useful for reading the data file using a new file writing capability available in ADS recorded signal back into simulation and for performing RF 2003C. The amount of data to be streamed out of the ESG measurements such as error vector magnitude (EVM) in ADS. is determined by the hard disk storage size to store the Baseband Studio Streaming file. Verifying Coded BER/PER Performance After the ADS simulation has been run and the binary Base