Digital Radio Broadcasting Network in the Arctic Region

Varlamov, O. V.; Varlamov, V. O.; Dolgopyatova, A. V.

doi:10.23919/fruct.2019.8711933

Cited by 28 publications

(1 citation statement)

References 6 publications

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“…The trend of continuous growth in the number of communication systems subscribers [ 1 ] and television and radio broadcasting [ 2 , 3 ] systems is accompanied by an increase in data rates, and in some cases occurs with the frequency band usage expansion. Therefore, according to [ 4 ], at the end of 2021, there were around 8.2 billion mobile subscriptions, which will increase to around 9.1 billion by the end of 2027.…”

Section: Introductionmentioning

confidence: 99%

Broadband and Efficient Envelope Amplifier for Envelope Elimination and Restoration/Envelope Tracking Higher-Efficiency Power Amplifiers

Varlamov

Nguyen

Grebennikov³

2022

Sensors

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Increasing the efficiency of transmitters, as the largest consumers of energy, is relevant for any wireless communication devices. For higher efficiency, a number of methods are used, including envelope tracking and envelope elimination and restoration. Increasing the bandwidth of used frequencies requires expanding envelope modulators bandwidth up to 250–500 MHz or more. The possibility of using amplifiers with input signal quantization (AISQ), as an alternative to the most common hybrid envelope tracking modulators, is considered. An approach has been developed for optimizing AISQ characteristics according to the criterion of minimum loss when amplifying modern telecommunication signals with Rayleigh envelope distribution. The optimal quantization levels are determined and the energy characteristics of AISQ are calculated. AISQ loss power is shown to decrease by 1.66 times with two-level quantization, by 2.4 times with three-level quantization, and by a factor of 3.0–3.7 for four–five quantization levels compared to a class B amplifier. With these parameters, AISQ becomes competitive with respect to hybrid envelope tracking modulators but does not have electromagnetic interference from the pulse width modulation (PWM) path.

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Section: Introductionmentioning

confidence: 99%