WIRELESS TRANSMITTER AND REFERENCE SIGNAL TRANSMISSION METHOD
3 Assignments
0 Petitions
Accused Products
Abstract
Disclosed are a wireless transmitter and a reference signal transmission method that improve channel estimation accuracy. In a terminal (100), which transmits a reference signal using n (n is a non-negative integer 2 or greater) band blocks (which correspond to clusters here), which are disposed with spaces therebetween in a frequency direction, a reference signal controller (106) switches the reference signal formation method of a reference signal generator (107) between a first formation method and a second formation method based on the number (n) of band blocks. In addition, a threshold value setting unit (105) adjusts a switching threshold value based on the frequency spacing between band blocks. Thus, the reference signal formation method can be selected with good accuracy and, as a result, channel estimation accuracy is further improved.
23 Citations
16 Claims
-
1-6. -6. (canceled)
-
7. A radio transmission apparatus that transmits a reference signal using n (n is a natural number of 2 or greater) bandwidth blocks that are positioned at intervals from each other in a direction of frequency, the apparatus comprising:
-
a formation section that forms the reference signal based on one of a first formation method, in which n subsequences are formed as the reference signal by dividing one code sequence into a length to match each bandwidth block, and a second formation method, in which n code sequences are formed as the reference signal by adjusting lengths of n code sequences to match each bandwidth block; and a switch section that switches reference signal formation methods in the formation section between the first formation method and the second formation method based on a switch threshold value and the number of the bandwidth blocks n. - View Dependent Claims (8, 9, 10, 11)
-
-
12. A reference signal transmission method of transmitting a reference signal using n (n is a natural number of 2 or greater) bandwidth blocks that are positioned at intervals from each other in a direction of frequency, the method comprising:
-
forming the reference signal based on one of a first formation method, in which n subsequences are formed as the reference signal by dividing one code sequence into a length to match each bandwidth block, and a second formation method, in which n code sequences are formed as the reference signal by adjusting lengths of n code sequences to match each bandwidth block; and switching reference signal formation methods between the first formation method and the second formation method based on a switch threshold value and the number of the bandwidth blocks n. - View Dependent Claims (13, 14, 15, 16)
-
Specification