Communication method of coordinated multi-point transmission systems

摘要

A communication method of coordinated multi-point transmission systems. Based on the Zadoff-Chu sequences, multiple training sequences are implemented, and the training sequences are a set of robust orthogonal training sequence (ROTS). Preamble signals that use the set of training sequences can be transmitted from multiple base stations/relay stations at the same time. In the case with the mixture signal of multiple preamble signals, user equipment can still use the received signal to estimate multiple carrier frequency offsets of the corresponding base stations/relay stations.

主权项

1. 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⟨MDk⟩N≈(k-1)⁢NK,and 2≦k≦K;
wherein, MDkN substantially approaches to(k-1)⁢NK; 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, Dk 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.