{'fraction_non_alphanumeric': 0.030139103554868624, 'fraction_numerical': 0.006955177743431221, 'mean_word_length': 5.166666666666667, 'pattern_counts': {'":': 0, '<': 0, '<?xml version=': 0, '>': 0, 'https://': 0, 'lorem ipsum': 0, 'www.': 0, 'xml': 0}, 'pii_count': 0, 'substrings_counts': 0, 'word_list_counts': {'cursed_substrings.json': 0, 'profanity_word_list.json': 0, 'sexual_word_list.json': 0, 'zh_pornsignals.json': 0}}
MIMO channel measurements using optical links on small mobile terminals

Most up-to-date and future communication standards (WiMax, LTE, LTE-A 802.11n) include some sort of Multiple Input Multiple Output (MIMO) scheme for the purposes of boosting the overall throughput in the system. Many of these standards also include small and portable (mobile phone size) device categories [1], where the antenna design is in general challenging due to the fundamental limitation of antennas [2], [3]. It is also well known what if the antenna can be identified as electrically small, measurement cable effects become a significant source of errors in nearly all types of antenna measurements, [4]. The additional antennas required for the MIMO schemes, pose even further challenges to the design as well as performance evaluation. The already scarce space for leading out measurement cables, becomes even less and new problems arise due to the cables (one for each antenna), for example increased coupling. Removing the errors that the conductive measurement cables add, brings the antenna design closer to reality, which can be extremely beneficial since there are no devices available to date supporting the new standards. Moreover, channel sounding data is more complete than any chip receiver anyway.