SYMBOL BOUNDARY DETECTION IN HIGH SPEED WIRELESS LOCAL AREA NETWORK

摘要

A method and an apparatus for detecting a symbol boundary are provided to determine symbol synchronization according to a result by comparing a critical value with a difference between a previous detected peak value and a present detected peak value. A symbol synchronization device calculates a cross-correlation value about a received preamble(101). The symbol synchronization device searches a maximum peak value about a corrected real number component(102). A first peak value is stored in an A register(103). A second peak value is stored in a B register(104). A difference between the first peak value and the second peak value is calculated(105). An absolute value of the peak difference is compared with a first critical value for determining the first peak value as a symbol boundary(106). If the peak difference is less than the first critical value, the first peak value is compared with a second critical value for determining the first peak value as symbol synchronization(107). If the first peak value is larger than the second critical value, a position in which the first peak value is generated is determined as the symbol boundary for the symbol synchronization(108). If the first peak value is less than the second critical value, the second peak value is stored in the A register(109).