UPLINK PILOT AND SIGNALING TRANSMISSION IN WIRELESS COMMUNICATION SYSTEMS

摘要

PROBLEM TO BE SOLVED: To provide techniques for efficiently transmitting pilot and signaling on the uplink in an OFDM system.SOLUTION: With subband multiplexing, M usable subbands in the system are partitioned into Q disjoint groups of subbands, which are assigned to different terminals for uplink pilot transmission. Multiple terminals may transmit simultaneously on their assigned subbands. The transmit power for the pilot transmission may be set higher to attain the same total pilot energy even though S instead of M subbands are used for pilot transmission by each terminal. In the pilot transmission from the terminals, a channel estimate is derived for each terminal. The channel estimate comprises a response for additional subbands not included in the assigned group. Subband multiplexing is also used for uplink signaling transmission.