EVM considerations for convergent multi-standard cellular base-station transmitters

Sandeep Kowlgi (1, 2) , Corinne Berland (3) , Timothy Ridgers (2) , Mattheijssen Paul (2)

1 COMELEC - Département Communications & Electronique
2 NXP Semiconductors
3 LaMIPS - Laboratoire de Microélectronique et de Physique des Semiconducteurs

Modern cellular base stations are becoming increasingly multi-carrier and multi-standard/multi-mode for improved efficiency and manageability. Primary among prospective multi-mode base station deployments will be those that are reconfigurable but also capable of simultaneous transmission of several types of cellular signals. However, unified or convergent-transmitter design is challenging, particularly with the small specified tolerances for signal distortion. We present an analysis of the Error Vector Magnitude (EVM) specifications for GSM/EDGE, UMTS and LTE, based on simulated EVM sensitivity to various distortions, focusing on a convergent transmit chain for multi-standard, multi-carrier macro-cell base stations. These analyses illustrate a method of deriving preliminary radio transmitter performance (phase noise, IQ imbalances, noise floor etc.) requirements, alongside helping to expose bottlenecks and performance tradeoffs necessary to optimize power consumption. A preliminary distribution of distortion or performance among the blocks is presented, to achieve the less than 5% multi-mode EVM budget, for worst-case scenarios.

Mots clés: Error vector magnitude; Convergent-transmitter design; Convergent multistandard cellular base-station transmitters; Cellular signals; UMTS; LTE; GSM-EDGE; EVM considerations; Multicarrier macrocell base stations; Multimode base station deployments; Power consumption; Radio transmitter; Noise; GSM; Vectors; Distorsion; Transmitters; OFDM; Base stations; 3G mobile communication; Cellular radio; Long term evolution; Radio transmitters

Domaines: Réseaux et télécommunications [cs.NI]

Sandeep Kowlgi, Corinne Berland, Timothy Ridgers, Mattheijssen Paul. EVM considerations for convergent multi-standard cellular base-station transmitters. IEEE 22nd International Symposium on Personal Indoor and Mobile Radio Communications (PIMRC), 2011, Sep 2011, Toronto, Canada. pp.1865 - 1869, ⟨10.1109/PIMRC.2011.6139832⟩. ⟨hal-00739800⟩