Title :
An efficient algorithm for simulating error vector magnitude in nonlinear OFDM amplifiers
Author :
Yamanouchi, Shingo ; Kunihiro, Kazuaki ; Hida, Hikaru
Author_Institution :
Syst. Devices Res. Labs., NEC Corp., Ibaraki, Japan
Abstract :
We have developed an algorithm for evaluating the error vector magnitude (EVM) from the single-tone distortion of power amplifiers in orthogonal frequency-division multiplexing (OFDM) systems. The developed formulas allow us to simulate EVM using only the single-tone response i.e. without modulation and demodulation; this enables us to easily calculate the EVM using a standard harmonic-balance (HB) simulator. This simulation scheme reduces the processing time by a factor of ten compared with conventional system-level (SL) simulation. The EVM obtained using this scheme agreed well with the results of SL simulation (0.6% error).
Keywords :
OFDM modulation; circuit simulation; error analysis; harmonic analysis; microwave power amplifiers; nonlinear distortion; nonlinear network analysis; 5 GHz; EVM; error vector magnitude simulation; harmonic-balance simulator; nonlinear OFDM amplifiers; orthogonal frequency-division multiplexing; power amplifier single-tone distortion; Demodulation; Discrete Fourier transforms; Frequency division multiplexing; Linearity; OFDM modulation; Peak to average power ratio; Phase distortion; Power amplifiers; Radio frequency; Wireless LAN;
Conference_Titel :
Custom Integrated Circuits Conference, 2004. Proceedings of the IEEE 2004
Print_ISBN :
0-7803-8495-4
DOI :
10.1109/CICC.2004.1358754
