A Dual-Band RF All-Digital Transmitter Based on MPWM Encoding

Yang, Si Yuan; Yang, Jun; Huang, Li Ying; Bai, Jin Liang; Zhang, Xiu Yin

doi:10.1109/tmtt.2021.3135858

Cited by 5 publications

(4 citation statements)

References 20 publications

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“…In recent years, the rapid increase in wireless communication requirements has brought challenges to the traditional analog architecture of transmitters, especially as the current trend is to achieve most of the functions of the digital domain by software-defined radio (SDR) techniques [1]. An all-digital transmitter [2][3][4][5] (ADTx) has flexible reconfigurability and programmability and meets the demand of SDR technology. The development of high-speed switching devices, such as the switched-mode power amplifier (SMPA), also brings the possibility of realization of the ADTx.…”

Section: Introductionmentioning

confidence: 99%

A Five-Level RF-PWM Method with Third and Fifth Harmonic Elimination for All-Digital Transmitters

Zhou²,

Li³

et al. 2022

Electronics

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An appropriate pulse-coding algorithm is the key to achieving an efficient switched-mode power amplification in all-digital transmitters. A five-level RF-PWM method with third and fifth harmonic elimination is proposed to relax the requirements of the filter and to reduce the control complexity of the SMPA for all-digital transmitters. By controlling the pulse width and the center position of three-level sub-pulses, third and fifth harmonic elimination is achieved. Meanwhile, the control complexity of the SMPA is reduced by the decrease in the output-signal-level number. Finally, the feasibility of the method is verified by simulation. For the 16QAM signal with a carrier frequency of 200 MHz, the proposed method can achieve third harmonic suppression of −46.24 dBc and fifth harmonic suppression of −54.05 dBc when coding efficiency reaches 77.51%.

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Section: Introductionmentioning

confidence: 99%

A Five-Level RF-PWM Method with Third and Fifth Harmonic Elimination for All-Digital Transmitters

Zhou²,

Li³

et al. 2022

Electronics

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show abstract

“…Introduction: All-digital transmitter [1][2][3] (ADTx) has flexible reconfigurability and programmability and meets the demand of software-defined radio (SDR) technology which implements most of the functions in the digital domain. However, the broadband requirement of SDR is a pressing issue in the engineering implementation of ADTx.…”

mentioning

confidence: 99%

A 5-level RF-PWM method with third and fifth harmonic elimination for all-digital transmitters

Zhou

et al. 2022

Preprint

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To relax the requirement of the filter and reduce the control complexity of the SMPA, this paper proposes a 5-level RF-PWM method for all-digital transmitters with 3rd and 5th harmonic elimination. The method is achieved by changing the threshold signal to control the pulse width of the 3-level sub-pulses. Finally, the feasibility of the method is verified by simulation. For the 16QAM signal with a carrier frequency of 200MHz, the proposed method can achieve -46.24dBc and -54.05dBc respectively when the coding efficiency reaches 77.51%.

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“…Therefore, ADTx can be realized, with highefficiency SMPA. Compared with the traditional analog transmitter, the ADTx [1]- [4] technology has flexible reconfigurability and reprogrammability. Thus, ADTx can meet the needs of software-defined radio (SDR) to achieve most of its functions in the digital domain.…”

mentioning

confidence: 99%

A novel all-digital transmitter with power equalization and harmonic elimination

Zhou

Zhu

et al. 2022

Preprint

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To reduce the loss caused by power imbalance between switched-mode power amplifier (SMPA) units of all-digital transmitters (ADTx), this paper proposes an all-digital transmitter structure with power equalization and harmonic elimination. Based on the third and fifth harmonic cancellation, this structure achieves output power equalization of SMPA by controlling the width of 3-level sub-pulses to be the same. Moreover, the equalization of each switch transistor is realized by outphasing method. Finally, the feasibility of the method is verified by simulation results. For different input signals with a carrier frequency of 200 MHz, the proposed structure achieves the same output power of each SMPA unit.

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A Dual-Band RF All-Digital Transmitter Based on MPWM Encoding

Cited by 5 publications

References 20 publications

A Five-Level RF-PWM Method with Third and Fifth Harmonic Elimination for All-Digital Transmitters

A Five-Level RF-PWM Method with Third and Fifth Harmonic Elimination for All-Digital Transmitters

A 5-level RF-PWM method with third and fifth harmonic elimination for all-digital transmitters

A novel all-digital transmitter with power equalization and harmonic elimination

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