Coding method of multiuser bidimension combined complementary spread spectrum code used for radio communication
Title：
Coding method of multiuser bidimension combined complementary spread spectrum code used for radio communication
Application Number：
 200310123848
Application Date：
 2003/12/31
Announcement Date：
 2004/12/22
Pub. Date：
Publication Number：
 1556599
Announcement Number：
 1234221
Grant Date：
 2005-12-28
Granted Pub. Date：
 2005-12-28
ApplicationType：
 Invention
State/Country：
 11[China|beijing]
IPC：
 H04J 13/02H03M 13/00H04B 1/707
Applicant(s)：
 Tsinghua Univ.
Inventor(s)：
 Zhang Chao, Lin Xiaokang, Hatori Mitsutoshi
Key Words：
 Coding method, multiuser, bidimension, complementary, spread spectrum code, radio communication
Abstract：
 The invention relates to a coding method for multi-user two-dimension united complementary frequency extending code in wireless communication. At first, when carrying on frequency extending code in multi-carrier code division multiple access communication, two complementary codes with length of 2 are used as seed codes, it is extended to with length of M, and arranged into 2XM matrix, the matrix is transposed, acquires a MX2 transposed matrix, the transposed matrix is extended, acquires a MXN base row vector matrix, assumes there has P users, when the P is more than 1, it generates P extended row vector matrixes of MXN'' repeatedly, the base user matrix of MXN''XP after being overlapped, when the sub-carrier quantity C is more than the extended seed code length M in the multi-carrier, the base user matrix is extended, the multi-user two-dimension united frequency extending matrix of CXN''XP can be acquired. The invention not only makes the relative functions of the frequency extending code in the multi-carrier system form a zero correlating window, upgrades the signal-to-noise ratio, increases the transmitting speed and the utilization rate of bandwidth, at the same time, it reduces the peak-mean ratio of the multi-carrier signal, reduces the cost of device.
Claim：
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PCT：
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