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

fYear

2006

fDate

21-24 May 2006

Lastpage

5671

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;

fLanguage

English

Publisher

ieee

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

Type

conf

DOI

10.1109/ISCAS.2006.1693921

Filename

1693921