Envelope Factorization with Partial Elimination and Recombination, EF-PER, a New Linear RF Architecture

Antoine Diet (1) , Geneviève Baudoin (2) , Samson Lasaulce (3)

1 GeePs - Laboratoire Génie électrique et électronique de Paris
2 ESYCOM - Electronique, Systèmes de communication et Microsystèmes
3 L2S - Laboratoire des signaux et systèmes

In this paper, a new architecture for efficient linear radio frequency transmitters is proposed; it includes envelope-tracking (ET) and envelope-elimination-and-restoration (EER) architectures as special instances. The proposed technique is referred to as Envelope Factoriza-tion with Partial Elimination and Recombination (EF-PER). It relies on a decomposition of the RF signal before power amplification as a product of two signals, one of them being the envelope signal elevated to an exponent " α ". Compared to ET or EER architectures, the parameter " α " constitutes a new degree of freedom. This allows one to realize good tradeoffs between different performance criteria such as spectrum use, power efficiency, and transmitter linearity. An intuitive aggregate cost function is introduced to capture the desired tradeoff and turns out to be maximized in α = 0.5. The full relevance of EF-PER is sustained both by analytical results and realistic simulations performed for OFDM signals. The EF-PER architecture (with α = 0.5) has been simulated under Agilent-ADS with a non-linear transistor model from Avago (E-PHEMT) and compared with ET and EER.

Mots clés: EER; ET; linearization techniques; power efficiency; PAPR; RF architecture; RF linear transmitter

Domaines: Electronique; Traitement du signal et de l'image [eess.SP]

Antoine Diet, Geneviève Baudoin, Samson Lasaulce. Envelope Factorization with Partial Elimination and Recombination, EF-PER, a New Linear RF Architecture. Radioengineering, 2015, RADIOENGINEERING 24 (4), pp.993-1001. ⟨10.13164/re.2015.0993⟩. ⟨hal-01275673⟩