Patent ID: 7848436
Filing Date: 2010-12-07
Classification: H04L

Abstract:
1. A method for detecting a symbol timing synchronization of an Orthogonal Frequency Division Multiplexing (OFDM) system, the method comprising: receiving, via the OFDM system configured to support transmissions of signals via radio channels that exhibit multi-path delays, a transmission symbol that has a Cyclic Prefix (CP) or a Cyclic Suffix (CS) inserted in a Orthogonal Frequency Division Multiplexing (OFDM) symbol; and applying either a first timing metric or a second timing metric to the received transmission symbol in order to detect a timing synchronization of the OFDM symbol based on a maximum value of the first or second timing metric, wherein the first timing metric is defined as shown in the following formula when the transmission symbol uses the CP: wherein P wherein the second timing metric is defined as shown in the following formula when the transmission symbol uses the CS: wherein P wherein the correlation metric P wherein the energy of the OFDM symbol R wherein the correlation metric P wherein the energy of the OFDM symbol R new CS(d) is obtained by the following formula, wherein r denotes the reception signal, d denotes the time index, and N denotes the length of the OFDM symbol: