|
|
|
| Frequency Synchronization in OFDM Systems Using Null Subcarriers: Analysis and Improvement |
| Wu Jie; Li Jian-dong |
State Key Lab of ISN and Broadband Wireless Communication Lab of Information Science Institute,
Xidian University, Xi’an 710071, China |
|
|
|
|
Abstract A novel frequency offset estimation algorithm for Orthogonal Frequency Division Multiplexing(OFDM) signals transmitted over frequency-selective channels is analyzed. The algorithm is discussed with channel zeros and arbitrarily assignment of null-subcarriers. The effect of distribution of null subcarriers and channel zeros is discussed. An adaptive assignment of null-subcarriers scheme is proposed. The proposed algorithm performs significantly better than the already existing methods.
|
|
Received: 18 January 2005
|
|
|
|
|
|
|
|
|
2006, Vol. 28 
