Multi-user detection in OFDM systems using CDMA and multiple antennas. - Christoph Degen; Lars Brühl (Eur. Trans. Telecommun., 2003)

On linear predistortion techniques for single-carrier and OFDM SD/CDMA systems. - Christoph Degen; Lars Brühl (PIMRC, 2004)

Linear and successive predistortion in the frequency domain: performance evaluation in SDMA systems. - Christoph Degen; Lars Brühl (WCNC, 2005)

SABA: A Testbed for a Real-Time MIMO System. - Daniel Borkowski; Lars Brühl; Christoph Degen; Wilhelm Keusgen; Gholamreza Alirezaei; Frank Geschewski; Christos Oikonomopoulos; Bernhard Rembold (EURASIP J. Adv. Signal Process., 2006)