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Miniaturized Transmitter in Digital Modulation System with Non-constant Envelope for VHF Band
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- Authors
- Heon-Kook Kwon, Sung Jun Lee, Byung-Su Kang, Bonghyuk Park
- Issue Date
- 2015-07
- Citation
- Progress in Electromagnetics Research Symposium (PIERS) 2015 in Prague, pp.210-213
- ISSN
- 1559-9450
- Publisher
- IEEE
- Language
- English
- Type
- Conference Paper
- Abstract
- In this paper, compact transmitter included power amplifier linearization in digital modulation with non-constant envelope for VHF band using cartesian feedback loop is presented. The digital modulation(QPSK/16-QAM/64-QAM) signal is non-constant envelope with constant peak to average power ratio. Digital modulation signal used when linearizing PA is 64-QAM, 70 ksps symbol rate, 0.35 of roll-off factor, and 7.5 dB PAPR. We used the Mitsubishi's Silicon power module, RA60H1317M1A, as a results, obtained an Adjacent Channel Power Ratio(ACPR) of less than -72 dBc, Error Vector Magnitude (EVM) of 2.8% at +39 dBm in VHF band. This technique is utilized to achieve miniaturization of transmitter with high linearity.
- KSP Keywords
- 16-ary quadrature amplitude modulation(16QAM), 64-QAM, Cartesian feedback loop, Constant Envelope(CE), Digital Modulation, High linearity, Peak to average Power ratio(PAPR), VHF band, adjacent channel power ratio(ACPR), error vector magnitude(EVM), modulation signal