Manuel Dinis José García Valdemar Monteiro Nelson Oliveira Millimetre-wave channel impulse response experimental evaluation and relation between delay spread and channel coherence bandwidth. 2292-2296 2002 PIMRC https://doi.org/10.1109/PIMRC.2002.1046553 conf/pimrc/2002 db/conf/pimrc/pimrc2002.html#DinisGMO02a