Study of a polar ΔΣ transmitter associated to a high efficiency switched mode amplifier for mobile Wimax.

Fabien Robert (1) , Martha Suarez (1) , Antoine Diet (2) , Martine Villegas (1) , Geneviève Baudoin (1)

1 ESYCOM - Electronique, Systèmes de communication et Microsystèmes
2 L2S - Laboratoire des signaux et systèmes

This paper presents the analysis and simulation of a high efficiency transmitter combining a polar sigma-delta modulator and a high efficiency amplifier. This study is carried out considering high PAPR mobile WiMax signals. Due to its high efficiency, the Class E amplifier was chosen. Performances and behavior of the designed amplifier were validated through simulations. In a second time the amplifier was associated to the polar transmitter to analyze the overall performances. Results confirm the challenges of transmitting high PAPR signals. Perspectives encourage the possibilities of providing efficient power amplification using a polar ΣΔ architecture.

Mots clés: architecture; PA; Sigma Delta

Domaines: Electronique; Electromagnétisme

Fabien Robert, Martha Suarez, Antoine Diet, Martine Villegas, Geneviève Baudoin. Study of a polar ΔΣ transmitter associated to a high efficiency switched mode amplifier for mobile Wimax.. 10th annual IEEE Wireless and Microwave Technology Conference, WAMICON, Apr 2009, Clearwater, United States. pp.T#2. ⟨hal-00445989⟩