Patent ID: 8792446

Claim:
A communication method of coordinated multi-point transmission systems, comprising the steps of: selecting a Zadoff-Chu sequence as a primitive training sequence; generating a set of orthogonal training sequences according to the primitive training sequence gone through with a set of cyclic shifts; allocating the set of orthogonal training sequences to multiple involving base stations; transmitting multiple preamble signals corresponding to the set of orthogonal training sequences from multiple base stations to a user equipment (UE) by a coordinated multi-point (CoMP) transmission method; and receiving a mixture signal of the multiple preamble signals at the UE, wherein the multiple orthogonal training sequences comply with relations of 〈 MD k 〉 N ≈ ( k - 1 ) ⁢ N K , and 2≦k≦K; wherein, MD k N substantially approaches to ( k - 1 ) ⁢ N K ; and N is the length of the orthogonal training sequence, □ N is the modulo-N operator, M is a positive integer parameter of the Zadoff-Chu sequence and relatively prime to N, D k is a cyclic shift, k is a positive integer, K is the number of involving base stations, and ≈ is a “relatively equal” sign indicating an approximation within a range.