Automated Large-Signal Load-Pull Characterization of Adjacent-Channel Power Ratio for Digital Wireless Communication Systems

Sevic, John F.; Baeten, Robert; Simpson, Gary M.; Steer, M.B.

doi:10.1109/arftg.1995.327134

Cited by 23 publications

(10 citation statements)

References 2 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…This expression assumes that only third-order nonlinearities determine out-of-band power, although it can be used with some modifications for examining the effects of higher order nonlinearities as well. Experimentally, it has been demonstrated that the IM3 and ACPR track each other closely as predicted by (2), and as the data in [31] demonstrates (see Fig. 8).…”

Section: B Power Amplifiersmentioning

confidence: 56%

Integrated circuit technology options for RFICs-present status and future directions

Larson

1998

IEEE J. Solid-State Circuits

207

View full text Add to dashboard Cite

Abstract-This paper will summarize the technology tradeoffs that are involved in the implementation of radio frequency integrated circuits for wireless communications. Radio transceiver circuits have a very broad range of requirements-including noise figure, linearity, gain, phase noise, and power dissipation. The advantages and disadvantages of each of the competing technologies-Si CMOS and bipolar junction transistors (BJT's), Si/SiGe HBT's and GaAs MESFET's, PHEMTS and HBT's will be examined in light of these requirements.

show abstract

Section: B Power Amplifiersmentioning

confidence: 56%

Integrated circuit technology options for RFICs-present status and future directions

Larson

1998

IEEE J. Solid-State Circuits

207

View full text Add to dashboard Cite

show abstract

“…The efficiency and spectral spreading of a device have both been shown to be functions of the amplifier's load impedance [5,6]. Wu connects ACPR results for broadband signals with predictions based on third-and fifth-order intermodulation results from two-tone tests [7].…”

Section: Introductionmentioning

confidence: 99%

The Smith tube: Selection of radar chirp waveform bandwidth and power amplifier load impedance using multiple-bandwidth load-pull measurements

et al. 2014

View full text Add to dashboard Cite

The operation of a radar system requires a trade-off between detection capabilities, power efficiency, and adjacent channel power minimization.Specifically, wide signal bandwidth is important for range detection. This paper presents how load-pull data taken for multiple linear frequencymodulated chirp waveforms with different bandwidths can be used to select the chirp waveform with the largest bandwidth possible, while meeting adjacent-channel power ratio and power-added efficiency requirements. This approach utilizes plots of adjacent-channel power ratio and power-added efficiency surfaces within a Smith tube, a three-dimensional, cylindrical extrapolation of the traditional Smith chart. A measurement example is given to illustrate the design approach. This approach will be useful in the design of range radars, and also is likely to find use in enabling real-time reconfiguration of future radars for varying spectral environments and efficiency requirements.

show abstract

“…With the advanced improvements in the baseband algorithms as well as the development of more complex modulation techniques, the traditional metrics such as P1dB and IP3 obtained from oneand two-tone stimuli can no longer be used to fully predict the system's performance; this is simply due to the fact that signals represented by discrete spectra do not reflect the complex digitally modulated signals. Furthermore that the performance of a transistor is closely related to the type of signal being used during the measurements [1], [2]. Therefore, it is of significant importance to study the characteristic of transistors under realistic conditions (using modulated RF signals) to obtain a better understanding of the transistor performance.…”

Section: Introductionmentioning

confidence: 99%

Load–Pull Characterization Using Different Digitally Modulated Stimuli

Ghanipour

Stapleton²,

Kim³

2007

IEEE Microw. Wireless Compon. Lett.

View full text Add to dashboard Cite

A large-signal fully automated load-pull system for characterization of wireless communication systems dependant on digitally modulated signals is described. Load-pull measurements are used to determine optimum load impedances for power gain and adjacent-channel power ratio (ACPR) in a laterally-diffused metal oxide semiconductor stimulated with wideband code division multiple access and orthogonal frequency-division multiplexing signals of various peak-to-average ratios. The results are compared to load-pull measurements of gain and third-order intermodulated products (IMD3), based on a two-tone source signal. The results indicate that the optimum match impedance changes depending on whether a two-tone or a digitally modulated source is used as a stimulus. Furthermore, it is shown that the optimum load impedance for power gain and ACPR is also dependant on the desired output power the device. It is shown, that the change in the optimum load match for the different types of signals is significant enough to warrant further investigation.Index Terms-Adjacent channel power ratio (ACPR), digital modulation, load-pull, optimum impedance, peak-to-average ratios (PARs).

show abstract

Automated Large-Signal Load-Pull Characterization of Adjacent-Channel Power Ratio for Digital Wireless Communication Systems

Cited by 23 publications

References 2 publications

Integrated circuit technology options for RFICs-present status and future directions

Integrated circuit technology options for RFICs-present status and future directions

The Smith tube: Selection of radar chirp waveform bandwidth and power amplifier load impedance using multiple-bandwidth load-pull measurements

Load–Pull Characterization Using Different Digitally Modulated Stimuli

Contact Info

Product

Resources

About