铁路交通中 PRACH 规划工具开发的实验研究.

To overcome the preamble collision in multi-RRU combined with same cell and other co-channel network scenario of rail transport, from the key role of random access, we redistribute and design preamble based on the Zadoff-Chu sequence structure. The aim is to promote reuse degree and complete tool development. The design method is related to the actual operation speed and the business needs in railway. Scene division depends on the performance of different frequency bands. In the low speed / high speed scene we determine the root sequence by rational cyclic shift to adapt different cell radius and different running speed. In the super high speed scene we use an adaptive interpolation method to design long sequence. Operational results show that the study can achieve sequence distribution in main interference area of the low speed / high speed scene, the sequence has good self-correlation ami cross correlation of the super high speed scene. So the preamble is fully isolated , and the uncertain factors in random access are effectively controlled. [ABSTRACT FROM AUTHOR]