| 代理机构 |
Birch, Stewart, Kolasch & Birch, LLP |
代理人 |
Birch, Stewart, Kolasch & Birch, LLP |
| 主权项 |
1. A channel estimation method in a multipath channel, the method comprising:
receiving a signal from a channel that is the multipath channel; obtaining information related to a number of paths and synchronization information related to each path from the received signal; estimating a channel using the obtained information related to the number of paths and synchronization information related to each path; calculating a metric using at least one impulse response value of a Square Root Raised Cosine (SRRC) filter and the obtained information; calculating an inverse metric of the calculated metric; and removing an inter-path interference from the estimated channel by multiplying the inverse metric with the estimated channel, wherein the removing of the inter-path interference from the estimated channel is obtained by the following equation:[h1h2h3⋮hL]=[a1,1a1,2a1,3⋯a1,La2,1a2,2a2,3⋯a2,La3,1a3,2a3,3⋯a3,L⋮⋮⋮⋱⋮aL,1aL,2aL,3⋯aL,L]-1[h^1h^2h^3⋮h^L], where hi denotes an i-th path of the multipath channel, an,m denotes the at least one impulse response value of the SRRC filter path, ĥj denotes a j-th path of the estimated channel, L denotes the number of paths, wherein an,m is 1 if n equals m, and wherein an,m represents an interference influence from m-th path to an n-th path if n is different from m, and an,m is set to 0 if a difference between synchronization positions of the m-th path and the n-th path is equal to an integer multiple of a time constant Tc between the m-th path and the n-th path of the SRRC filter. |
