Title :
Effects of RF impairments in transmitter for the future beyond-3G communications systems
Author :
Woo, Sanghyun ; Yu, Hyeongseok ; Lee, Jeakon ; Lee, Chang-Ho ; Laskar, Joy
Author_Institution :
Commun. & Network Lab., Samsung Adv. Inst. of Technol., Yong-In-Si
Abstract :
In this paper, the performance degradation of a MIMO OFDM-based beyond-3G system, due to various impairments in the radio frequency (RF) circuitry such as AM-AM distortion of power amplifier (PA), in-phase/quadrature-phase (IQ) mismatch effects, is investigated. In order to accurately assess the overall effects of RF impairments on the system performance, constellation diagram and power spectral density (PSD) of the waveform as well as the traditional quantitative figures of merits like error vector magnitude (EVM) of the complete baseband/RF link are used. By analyzing the experimental results, the specification for the RF impairments that ensures a tolerable level of performance can be determined
Keywords :
3G mobile communication; MIMO systems; OFDM modulation; nonlinear distortion; power amplifiers; radio transmitters; AM-AM distortion; MIMO OFDM system; RF impairments; beyond-3G communications systems; constellation diagram; error vector magnitude; in-phase mismatch effect; performance degradation; power amplifier; power spectral density; quadrature-phase mismatch effect; radio frequency circuitry; system performance; Baseband; Circuits; Constellation diagram; Degradation; MIMO; Power amplifiers; Radio frequency; Radio transmitters; Radiofrequency amplifiers; System performance;
Conference_Titel :
Circuits and Systems, 2006. ISCAS 2006. Proceedings. 2006 IEEE International Symposium on
Conference_Location :
Island of Kos
Print_ISBN :
0-7803-9389-9
DOI :
10.1109/ISCAS.2006.1693921
