{"publishers": ["Springer"], "languages": [{"key": "/l/eng"}], "subtitle": "Theory And Applications Of OFDM", "source_records": ["amazon:0387225757:23:433569318:274432", "marc:marc_loc_updates/v36.i10.records.utf8:21051343:1252"], "title": "Multi-carrier Digital Communications", "number_of_pages": 418, "created": {"type": "/type/datetime", "value": "2008-04-29T13:35:46.876380"}, "isbn_13": ["9780387225753"], "authors": [{"key": "/a/OL2679986A"}, {"key": "/a/OL2679987A"}, {"key": "/a/OL2679988A"}], "isbn_10": ["0387225757"], "publish_date": "October 7, 2004", "key": "/b/OL7444425M", "last_modified": {"type": "/type/datetime", "value": "2009-05-05T12:22:38.277677"}, "latest_revision": 2, "type": {"key": "/type/edition"}, "id": 10136497, "first_sentence": {"type": "/type/text", "value": "The physical layer of digital communications includes mapping of digital input information into a waveform for transmission over a communication channel and mapping of the received waveform into digital information that hopefully agrees with the original input since the communication channel may introduce various forms of distortion as well as noise [3]."}, "revision": 2}