Orthogonal Frequency Division Multiplex
{"Image DocumentName": "Orthogonal Frequency Division Multiplex", "Image ImageDescription": "Uses a relatively large number of subcarriers that fill the allocated bandwidth with a low data rate per carrier. Used to minimize multipath problems. DRM Mode A - 24 carriers/kHz = 204 in 9 kHz. Mode B (SW) - 21 carriers/kHz = 182 in 9 kHz. Modulation of each carrier is QAM 4, 16, or 64 states. Synchronization signals are distributed thru each frame to give the receiver a phase and amplitude reference for each carrier.", "Image XResolution": "37", "Image YResolution": "37", "Image ResolutionUnit": "Pixels/Centimeter", "Image Software": "SlidePlayer", "Image YCbCrPositioning": "Centered"}