Patent ID: 6549592
Filing Date: 2003-04-15
Classification: H04L

Abstract:
A system for transmitting an OFDM signal via a channel to facilitate receiver synchronization comprising:a transforming stage that transforms a first series of N frequency domain symbols into a first burst of N time domain symbols and that transforms a second series of M frequency domain data symbols into a second burst of M time domain symbols; a cyclic prefix appending stage that appends to a beginning of said first time domain burst a first cyclic prefix duplicating a last segment of said first time domain burst to form a first synchronization burst, and that appends to a beginning of said second time domain burst a second cyclic prefix duplicating a last segment of said second time domain burst to form a second synchronization burst, said first and second cyclic prefixes including a first portion having length v wherein v is greater than or equal to a duration of an impulse response of said channel; and further including a second portion after said first portion to facilitate receiver synchronization; and wherein said first and second synchronization bursts are transmitted concatenated together.