Method of generating code sequence and method of transmitting signal using the same

Abstract

A method of generating a code sequence and method of adding additional information using the same are disclosed, by which a code sequence usable for a channel for synchronization is generated and by which a synchronization channel is established using the generated sequence. The present invention, in which the additional information is added to a cell common sequence for time synchronization and frequency synchronization, includes the steps of generating the sequence repeated in time domain as many as a specific count, masking the sequence using a code corresponding to the additional information to be added, and transmitting a signal including the masked sequence to a receiving end.

What is claimed is: 
     
       1. A method of transmitting a cell common sequence for synchronization by a transmitter, the method comprising:
 acquiring the cell common sequence generated such that a frequency index with a constant interval is allocated to each sample of the cell common sequence in a frequency domain and the cell common sequence is masked with a code for a specific information; and 
 transmitting the acquired cell common sequence to a receiver. 
 
     
     
       2. The method of  claim 1 , wherein the masking comprises multiplying each sample of the cell common sequence by each sample of the code. 
     
     
       3. The method of  claim 1 , wherein the interval depends on the specific count. 
     
     
       4. The method of  claim 1 , wherein the acquired cell common sequence is transmitted as secondary synchronization channel (S-SCH) signals. 
     
     
       5. The method of  claim 1 , wherein the transmitting comprises transmitting the signal using a plurality of orthogonal subcarriers. 
     
     
       6. The method of  claim 1 , wherein the cell common sequence comprises at least one of
 a first sequence generated such that a frequency index with an even number is allocated to each sample of the first sequence, and 
 a second sequence generated such that a frequency index with an odd number is allocated to each sample of the second sequence. 
 
     
     
       7. The method of  claim 1 , wherein the specific information comprises information indicating a subframe number via which the cell common sequence is transmitted. 
     
     
       8. The method of  claim 1 , wherein the cell common sequence is generated to have guard subcarriers. 
     
     
       9. The method of  claim 1 , wherein the cell common sequence is transmitted such that no sample of the cell common sequence is transmitted via DC subcarrier. 
     
     
       10. A transmitter transmitting a cell common sequence for synchronization, the transmitter comprising:
 a sequence generating module for acquiring the cell common sequence generated such that a frequency index with a constant interval is allocated to each sample of the cell common sequence in a frequency domain and the cell common sequence is masked with a code for a specific information; and 
 a transmitting module for transmitting the acquired cell common sequence to a receiver. 
 
     
     
       11. The transmitter of  claim 10 , wherein the acquired cell common sequence is transmitted as secondary synchronization channel (S-SCH) signals. 
     
     
       12. The transmitter of  claim 10 , wherein the cell common sequence comprises at least one of
 a first sequence generated such that a frequency index with an even number is allocated to each sample of the first sequence, and 
 a second sequence generated such that a frequency index with an odd number is allocated to each sample of the second sequence. 
 
     
     
       13. The transmitter of  claim 10 , wherein the specific information comprises information indicating a subframe number via which the cell common sequence is transmitted. 
     
     
       14. The transmitter of  claim 10 , wherein the cell common sequence is generated to have guard subcarriers. 
     
     
       15. The transmitter of  claim 10 , wherein the cell common sequence is transmitted such that no sample of the cell common sequence is transmitted via DC subcarrier.