Patent ID: 8761128
Filing Date: 2014-06-24
Classification: H04L

Abstract:
1. A method for sending a middle pilot, comprising: selecting a middle pilot sequence set; creating a middle pilot subcarrier union; mapping by a base station a middle pilot sequence in the middle pilot sequence set after modulation, through an OFDMA or OFDM symbol used for transmitting the middle pilot, onto a middle pilot subcarrier in a middle pilot subcarrier union corresponding to each transmission antenna, or, mapping by a base station a middle pilot sequence in the middle pilot sequence set, through an OFDMA or OFDM symbol used for transmitting the middle pilot, onto a middle pilot subcarrier in a middle pilot subcarrier union corresponding to each transmission antenna and then performing modulation on data at the subcarrier, wherein the step of creating a middle pilot subcarrier union comprises: setting a subcarrier in the OFDMA or OFDM symbol, the index of which meets the following condition, as a union of the middle pilot subcarriers, for transmitting the middle pilot sequence, of all wireless communication networking units: the above formula represents that the index increases to in the unit of 1 starting from N start , and then increases to N start +N used −1 in the unit of 1 starting from wherein both N start and N used are positive integers, wherein N used is the number of the subcarriers other than protection band subcarriers in an OFDMA or OFDM system, and represents the integral value by flooring the