STAGGERED PILOT TRANSMISSION FOR CHANNEL ESTIMATION AND TIME TRACKING

摘要

PROBLEM TO BE SOLVED: To allow a receiving entity to derive a longer channel estimate while limiting overhead. SOLUTION: A transmitting entity transmits a pilot on different groups of subbands at different time intervals. N subbands in a system are arranged into M non-overlapping groups. The transmitting entity transmits the pilot on a different subband group in each time interval, and selects all M subband groups at M time intervals based on a pilot staggering pattern. A receiving entity derives an initial impulse response estimate with P channel taps based on the pilot received on one subband group and two longer impulse response estimates with different lengths used for data detection and time tracking. COPYRIGHT: (C)2011,JPO&INPIT