Preamble structures for single-input, single-output (SISO) and multi-input, multi-output (MIMO) communication systems

摘要

A communication system is provided herein for transmitting frames across a channel. The frames may be transmitted in single-input, single-output (SISO) and/or multi-input, multi-output (MIMO) communication systems. One such frame includes at least one training symbol, each having a cyclic prefix and a training block. The time length N_I of the training block is equal to an integer fraction I of the time length of a data block, i.e., N_I=N/I. Furthermore, the time length G of the cyclic prefix is an integer fraction of the time length N_I. For example, G may be equal to N_I/4 or 25% of N_I. The training symbols provide coarse and fine time synchronization, coarse and fine frequency synchronization, channel estimation, and noise variance estimation.